ПРОВОЛОКА ДЛЯ РАСКИСЛЕНИЯ И ЛЕГИРОВАНИЯ МЕТАЛЛА И ТЕХНОЛОГИЧЕСКАЯ ЛИНИЯ ДЛЯ ЕЕ ПОЛУЧЕНИЯ

1. Проволока для раскисления и легирования металла, которая состоит из металлической оболочки и наполнителя, отличающаяся тем, что металлическая оболочка выполнена из вторичного алюминия или его сплавов, а наполнитель выполнен из металлического сердечника, при этом внешний диаметр металлической оболочки и диаметр сердечника связаны между собой соотношением (2-5): 1, а по длине сердечника металлическая оболочка разделена по поперечному сечению до поверхности сердечника на отрезки равные 5÷10 внешнего диаметра металлической оболочки. 2. Проволока по п.1, отличающаяся тем, что металлический сердечник выполнен из углеродистой марки стали. 3. Проволока по п.1, отличающаяся тем, что металлический сердечник выполнен из низколегированной марки стали. 4. Проволока по п.1, отличающаяся тем, что металлический сердечник выполнен из легированной марки стали. 5. Проволока по п.1, отличающаяся тем, что металлический сердечник выполнен из высоколегированной марки стали. 6. Проволока по любому из п.п.2-5, отличающаяся тем, что металлический сердечник выполнен из стальной проволоки диаметром 2÷4 мм. 7. Технологическая линия для получения проволоки с алюминиевой оболочкой, содержащая размоточные и намоточные аппараты, емкость для расплава алюминия, отличающаяся тем, что емкость установлена за размоточным аппаратом и снабжена внутри направляющими роликами, а в донной части емкость сочленена с металлоприемником, который в свою очередь соединен с кристаллизатором, по линии оси которого снизу установлен делитель с входными и выходными прижимными центрирующими роликами. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 43 872 (13) U1 (51) МПК C21C 1/02 (2000.01) C21C 7/00 (2000.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ (21), (22) Заявка: 2004124123/22 , 09.08.2004 (24) Дата начала отсчета срока действия патента: 09.08.2004 (45) Опубликовано: 10.02.2005 (72) Автор(ы): Мальцев В.П. (RU) (73) Патентообладатель(и): Мальцев ...

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ЛИТНИКОВАЯ СИСТЕМА ДЛЯ МОДИФИЦИРОВАНИЯ ЖИДКОГО ЧУГУНА

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ЧУШКА ДЛЯ РАСКИСЛЕНИЯ ЧУГУНА И СТАЛИ

1. Чушка для раскисления чугуна и стали, содержащая литую матрицу из алюминия или его сплава, армирующий наполнитель и связующее, отличающаяся тем, что матрица содержит армирующий наполнитель в виде частиц сплава на основе железа с поверхностной оболочкой из связующего на основе интерметаллида алюминия. 2. Чушка по п.1, отличающаяся тем, что соотношения массовых долей матричного и армирующего составляющих равно соответственно 30/70-50/50. 3. Чушка по п.1, отличающаяся тем, что связующее используют в виде интерметаллид-соединения FeAl и(или) FeAl. 4. Чушка по п.1, отличающаяся тем, что наполнитель используют в виде металлической дроби со средним диаметром частиц (d) 2,0-10 мм. 5. Чушка по п.1, отличающаяся тем, что толщина (t) поверхностной оболочки связующего связана с размером частиц (d) соотношением t=(0,09-0,2)d. 6. Чушка по п.1, отличающаяся тем, что соотношение закрытой и открытой пористостей в ней равно 5:1. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 128 882 U1 (51) МПК C21C 7/06 (2006.01) C21C 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ 2012153137/02, 07.12.2012 (24) Дата начала отсчета срока действия патента: 07.12.2012 (72) Автор(ы): Гаглоев Александр Григорьевич (RU), Майер Артем Викторович (RU) (45) Опубликовано: 10.06.2013 Бюл. № 16 1 2 8 8 8 2 R U Формула полезной модели 1. Чушка для раскисления чугуна и стали, содержащая литую матрицу из алюминия или его сплава, армирующий наполнитель и связующее, отличающаяся тем, что матрица содержит армирующий наполнитель в виде частиц сплава на основе железа с поверхностной оболочкой из связующего на основе интерметаллида алюминия. 2. Чушка по п.1, отличающаяся тем, что соотношения массовых долей матричного и армирующего составляющих равно соответственно 30/70-50/50. 3. Чушка по п.1, отличающаяся тем, что связующее используют в виде интерметаллидсоединения Fe3Al и(или) FeAl. 4. Чушка по п.1, отличающаяся тем, что наполнитель используют в ...

ПОРОШКОВАЯ ПРОВОЛОКА ДЛЯ ПРИСАДКИ МАГНИЯ В РАСПЛАВЫ НА ОСНОВЕ ЖЕЛЕЗА

1. Порошковая проволока для присадки магния в расплав на основе железа, состоящая из металлической оболочки и наполнителя из механической смеси порошков магния и пассивирующей добавки, отличающаяся тем, что в качестве пассивирующей добавки использован огнеупорный материал с температурой плавления не ниже 1580°С, причем отношение между порошком магния и огнеупорным материалом в наполнителе составляет (0,25-1,95):1, а соотношение между составными частями порошковой проволоки составляет, в мас. %: 2. Порошковая проволока по п. 1, отличающаяся тем, что огнеупорный материал с температурой плавления не ниже 1580°С представляет собой магнезит, периклаз, дистен-силлиманитовый концентрат, карборунд, корунд, обожженный доломит, известь или плавленую смесь с содержанием СаО≥50,0 мас. %. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 163 760 U1 (51) МПК C21C 7/00 (2006.01) C21C 1/10 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ 2015146035/02, 26.10.2015 (24) Дата начала отсчета срока действия патента: 26.10.2015 (72) Автор(ы): Кисиленко Владимир Васильевич (UA), Бородина Татьяна Александровна (RU) (45) Опубликовано: 10.08.2016 Бюл. № 22 наполнитель 32-65 металлическая оболочка 35-68. 2. Порошковая проволока по п. 1, отличающаяся тем, что огнеупорный материал с температурой плавления не ниже 1580°С представляет собой магнезит, периклаз, дистенсиллиманитовый концентрат, карборунд, корунд, обожженный доломит, известь или плавленую смесь с содержанием СаО≥50,0 мас. %. R U 1 6 3 7 6 0 Формула полезной модели 1. Порошковая проволока для присадки магния в расплав на основе железа, состоящая из металлической оболочки и наполнителя из механической смеси порошков магния и пассивирующей добавки, отличающаяся тем, что в качестве пассивирующей добавки использован огнеупорный материал с температурой плавления не ниже 1580°С, причем отношение между порошком магния и огнеупорным материалом в наполнителе составляет (0,25-1,95):1, ...

Комбинированная инжекционная проволока

Полезная модель относится к черной металлургии, а именно к инжекционным проволокам для обработки чугуна и стали. Технический результат заключается в высокой эффективности активных реагентов инжекционной проволоки при внепечной обработке металлургических расплавов. Для достижения технического результата инжекционная проволока содержит комбинированный наполнитель, расположенный внутри стальной оболочки, причем наполнитель имеет в своем составе несколько реагентов и как минимум один из реагентов имеет форму монолитной проволоки. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 169 359 U1 (51) МПК C21C 7/04 (2006.01) C21C 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ (21)(22) Заявка: 2015153314, 14.12.2015 (24) Дата начала отсчета срока действия патента: 14.12.2015 15.03.2017 Приоритет(ы): (22) Дата подачи заявки: 14.12.2015 (56) Список документов, цитированных в отчете о поиске: FR 2610331 A, 05.08.1988. RU Адрес для переписки: 115682, Москва, Задонский пр-д, 22, кв. 76, Караханянцу Араму Михайловичу 1 6 9 3 5 9 R U Стр.: 1 достижения технического результата инжекционная проволока содержит комбинированный наполнитель, расположенный внутри стальной оболочки, причем наполнитель имеет в своем составе несколько реагентов и как минимум один из реагентов имеет форму монолитной проволоки. U 1 (54) Комбинированная инжекционная проволока (57) Реферат: Полезная модель относится к черной металлургии, а именно к инжекционным проволокам для обработки чугуна и стали. Технический результат заключается в высокой эффективности активных реагентов инжекционной проволоки при внепечной обработке металлургических расплавов. Для 1 6 9 3 5 9 2152834 С1, 20.07.2000. RU 2011685 С1, 30.04.1994. RU 2118379 C1, 10.09.1996. DE 102006048028 B3, 27.03.2008. US 4435210 A, 06.03.1984. (45) Опубликовано: 15.03.2017 Бюл. № 8 R U (73) Патентообладатель(и): Неретин Александр Алексеевич (RU), Караханянц Арам Михайлович (RU) Дата регистрации: U 1 (72) Автор ...

Инжекционная проволока для обработки металлургических расплавов

Полезная модель относится к черной металлургии, в частности к инжекционным проволокам для обработки чугуна и стали. С целью эффективного применения активных реагентов для легирования и рафинирования металлургических расплавов, модифицирования неметаллических включений и повышения чистоты стали инжекционная проволока состоит из наполнителя и внешней оболочки, при этом между внешней оболочкой и наполнителем расположена дополнительная оболочка в форме замкнутого кольца или кольцевого сектора. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 184 357 U1 (51) МПК C21C 7/00 (2006.01) C21C 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ (52) СПК C21C 7/00 (2006.01); C21C 1/00 (2006.01) (21)(22) Заявка: 2017128580, 11.08.2017 (24) Дата начала отсчета срока действия патента: (73) Патентообладатель(и): Караханянц Арам Михайлович (RU), Неретин Александр Алексеевич (RU) Дата регистрации: 23.10.2018 (56) Список документов, цитированных в отчете о поиске: FR 2610331 A, 05.08.1988. RU 2011685 С1, 30.04.1994. RU 2152834 C1, 20.07.2000. US 4435210 A, 06.03.1984. (45) Опубликовано: 23.10.2018 Бюл. № 30 R U 1 8 4 3 5 7 (54) Инжекционная проволока для обработки металлургических расплавов (57) Реферат: Полезная модель относится к черной неметаллических включений и повышения металлургии, в частности к инжекционным чистоты стали инжекционная проволока состоит проволокам для обработки чугуна и стали. С из наполнителя и внешней оболочки, при этом целью эффективного применения активных между внешней оболочкой и наполнителем реагентов для легирования и рафинирования расположена дополнительная оболочка в форме металлургических расплавов, модифицирования замкнутого кольца или кольцевого сектора. Стр.: 1 U 1 U 1 Адрес для переписки: 115682, Москва, Задонский пр-д, 22, кв. 76, Караханянцу Араму Михайловичу 1 8 4 3 5 7 Приоритет(ы): (22) Дата подачи заявки: 11.08.2017 R U 11.08.2017 (72) Автор(ы): Караханянц Арам Михайлович (RU), Неретин Александр ...

Инжекционная проволока для обработки металлургических расплавов

Полезная модель относится к черной металлургии, в частности к инжекционным проволокам для обработки стали и чугуна. Для эффективного применения активных реагентов для легирования и рафинирования металлургических расплавов, модифицирования неметаллических включений и повышения чистоты стали инжекционная проволока состоит из наполнителя и внешней оболочки, при этом между внешней оболочкой и наполнителем расположена дополнительная оболочка в форме кольца. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 207 918 U1 (51) МПК C21C 7/00 (2006.01) C21C 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ (52) СПК C21C 7/00 (2021.05); C21C 1/00 (2021.05) (21)(22) Заявка: 2020139854, 04.12.2020 (24) Дата начала отсчета срока действия патента: (73) Патентообладатель(и): Караханянц Арам Михайлович (RU), Неретин Александр Алексеевич (RU) Дата регистрации: 24.11.2021 (56) Список документов, цитированных в отчете о поиске: FR 2821626 A1, 06.09.2002. RU 184357 U1, 23.10.2018. RU 2660785 С2, 09.07.2018. US 6508857 B2, 21.01.2003. (45) Опубликовано: 24.11.2021 Бюл. № 33 R U 2 0 7 9 1 8 (54) Инжекционная проволока для обработки металлургических расплавов (57) Реферат: Полезная модель относится к черной неметаллических включений и повышения металлургии, в частности к инжекционным чистоты стали инжекционная проволока состоит проволокам для обработки стали и чугуна. Для из наполнителя и внешней оболочки, при этом эффективного применения активных реагентов между внешней оболочкой и наполнителем для легирования и рафинирования расположена дополнительная оболочка в форме металлургических расплавов, модифицирования кольца. Стр.: 1 U 1 U 1 Адрес для переписки: 115682, Москва, Задонский пр-д, 22, кв. 76, Караханянцу Араму Михайловичу 2 0 7 9 1 8 Приоритет(ы): (22) Дата подачи заявки: 04.12.2020 R U 04.12.2020 (72) Автор(ы): Караханянц Арам Михайлович (RU), Неретин Александр Алексеевич (RU) U 1 U 1 2 0 7 9 1 8 2 0 7 9 1 8 R U R U Стр.: 2 RU 5 10 15 ...

METHOD FOR REMOVING IMPURITIES IN MOLTEN CAST IRON, AND CAST IRON RAW MATERIAL

There is provided a method for obtaining a pure melt in which the impurities Mn, Al, Ti, Pb, Zn, and B are removed from molten cast iron and depletion of useful C and Si is suppressed, the method wherein an excess oxygen flame having a theoretical combustion ratio of fuel and oxygen (amount of oxygen (volume)×5/amount of fuel (volume)) of 1 to 1.5 is directly exposed to the surface of pre-melted molten cast iron, the temperature of the molten cast iron is held at 1250° C. or more and less than 1500° C. while the melt surface is superheated and an acidic slag is brought into contact with the melt, and an oxygen-containing gas is injected into the interior of the molten cast iron. 1. A method for removing impurities including manganese (Mn) while suppressing the depletion of carbon (C) and silicon (Si) included in pre-melted molten cast iron , the method for removing impurities in molten cast iron characterized in comprising: holding the temperature of the molten cast iron at 1250° C. or more and less than 1500° C.; and directly exposing a surface of the molten cast iron to an excess oxygen flame having a theoretical combustion ratio of fuel and oxygen (amount of oxygen (volume)×5/amount of fuel (volume)) of 1 to 1.5 while allowing the melt and an acidic slag layer to come into contact with each other to superheat the surface.2. The method for removing impurities in molten cast iron of claim 1 , characterized in being a method in which (ΔC/ΔMn) or (ΔSi/ΔMn) is 2.5 or less when the removal efficiency per unit time of the manganese (Mn) is (ΔMn/h) claim 1 , the removal efficiency per unit time of the carbon (C) is (ΔC/h) claim 1 , and the removal efficiency per unit time of the silicon (Si) is (ΔSi/h).3. The method for removing impurities in molten cast iron of or claim 1 , characterized in that an oxygen-containing gas is injected from the interior of the molten cast iron to a surface of the molten cast iron on which the excess oxygen flame is directly exposed.4. The ...

Method for producing nodular cast iron

A method for producing nodular cast iron by using a nodulizer and a spheroidizing device, the method including spheroidizing, the spheroidizing including the following steps: a) placing an integrated rare earth magnesium ferrosilicon nodulizer coated with a rectangular steel tube at a preset position inside a spheroidizing ladle, disposing a strut head on the spheroidizing ladle, and fixing the strut head; b) inputting a ferrosilicon inoculant into the spheroidizing ladle; c) inputting melted iron into the spheroidizing ladle for spheroidizing; and d) removing the strut head from the spheroidizing ladle after spheroidizing.

Rotary degasser and rotor therefor

A device for dispersing gas into molten metal includes an impeller, a drive shaft having a gas-transfer passage therein, and a first end and a second end, and a drive source. The second end of the drive shaft is connected to the impeller and the first end is connected to the drive source. The impeller includes a first portion and a second portion with a plurality of cavities. The first portion covers the second portion to help prevent gas from escaping to the surface without entering the cavities and being mixed with molten metal as the impeller rotates. When gas is transferred through the gas-transfer passage, it exits through the gas-release opening(s) in the bottom of the impeller. At least some of the gas enters the cavities where it is mixed with the molten metal being displaced by the impeller. Also disclosed are impellers that can be used to practice the invention.

Method for desulfurizing hot metal

In a method for desulfurizing hot metal by analyzing S concentration of a sample taken out from the hot metal, the S concentration is analyzed rapidly and precisely by a method comprising a high frequency induction heating step of oxidizing the sample under a high frequency induction heating in a pure oxygen atmosphere to convert S in the hot metal to SO 2 and an analysis step of analyzing SO 2 -containing gas generated in the high frequency induction heating step through an ultraviolet fluorescence method to quantify S concentration in the sample, whereby S concentration after the desulfurization is controlled precisely and hence fault of S concentration is prevented but also the increase of the cost due to the excessive addition of a desulfurization agent and step disruption at steel-making step are prevented.

METHOD FOR PRELIMINARY TREATMENT OF MOLTEN IRON

There is proposed a method for preliminary treatment of molten iron wherein heat source for dissolving scrap is ensured sufficiently to improve iron yield while decreasing phosphorus concentration efficiently by suppressing the amount of flux solvent used in the process of desiliconization, dephosphorization and decarburization. In the method for preliminary treatment of molten iron by conducting desiliconization and dephosphorization of molten iron with a converter type container, molten iron is first charged into the converter type container to conduct desiliconization and then intermediate slag removal is conducted, and subsequently a lime-based flux solvent is added to the container while blowing oxygen to conduct dephosphorization of the molten iron, and thereafter newly untreated molten iron is charged into the container to conduct desiliconization, and subsequently the above treatments are repeatedly conducted with the same container. 1. A method for preliminary treatment of molten iron by conducting desiliconization and dephosphorization of molten iron with a converter type container wherein molten iron tapped from a blast furnace is first charged into the converter type container to conduct desiliconization and then the molten iron and a part of a slag after the desiliconization are retained in the container to conduct intermediate slag removal and subsequently the molten iron and slag retained in the container after the desiliconization is added with a lime-based flux solvent while blowing oxygen to conduct dephosphorization of the molten iron , wherein not less than 30 mass % of a slag having a slag basicity of not less than 1.2 after the dephosphorization is retained in the converter type container , and then at least untreated molten iron is charged into the container containing the slag after the dephosphorization to conduct desiliconization , and silicon concentration of molten iron at the end of the desiliconization is made to not more than 0.2 mass ...

HEATING DEVICE AND HEATING METHOD OF TORPEDO CAR

A heating device of a torpedo car which heats an inside of the torpedo car under a state where a torpedo car main body is turned in such a manner that a mouth is located at a lateral side of the torpedo car main body, the heating device comprising: a burner which is inserted into the inside of the torpedo car from the mouth; and a lid which partially covers a lower side of the mouth so that an opening of the mouth has an open area ratio set in advance in a side view. 18-. (canceled)9. A heating device of a torpedo car which heats an inside of the torpedo car under a state where a torpedo car main body is turned in such a manner that a mouth is located at a lateral side of the torpedo car main body , the heating device comprising:a burner which is inserted into the inside of the torpedo car from the mouth; anda lid which partially covers a lower side of the mouth so that an opening of the mouth has an open area ratio set in advance in a side view.10. The heating device of the torpedo car according to claim 9 , whereinthe open area ratio is 10% to 80% of an area where a cross-sectional area of the burner is excluded from an opening area of the mouth.11. The heating device of the torpedo car according to claim 9 , whereinthe lid is supported by an elastic body having elasticity in a horizontal direction toward the mouth.12. The heating device of the torpedo car according to claim 10 , whereinthe lid is supported by an elastic body having elasticity in a horizontal direction toward the mouth.13. The heating device of the torpedo car according to claim 9 , whereina refractory having elasticity is attached to a surface of the lid on the mouth side at a part where the lid and the torpedo car are in contact.14. The heating device of the torpedo car according to claim 10 , whereina refractory having elasticity is attached to a surface of the lid on the mouth side at a part where the lid and the torpedo car are in contact.15. The heating device of the torpedo car according to ...

Desulfurization Agent Containing Bitumen, Method for the Production Thereof, and Use Thereof

An agent for desulfurizing and/or for pre-desulfurizing, in particular for desulfurizing and/or pre-desulfurizing molten pig iron or molten steel, contains calcium oxide and bitumen. 123-. (canceled)24. An agent for desulfurizing and/or pre-desulfurizing which contains calcium oxide , bitumen as well as between 0.01 and 10% by weight of at least one flux agent , wherein the at least one flux agent is selected from the group of members consisting of multivalent alcohols , bituminous coal , silicone oils and mixtures thereof , and wherein the agent does not contain any calcium carbide , any magnesium or any magnesium alloy.25. The agent in accordance with claim 24 , wherein the bitumen is selected from the group of members consisting of road construction bitumen claim 24 , hard road construction bitumen claim 24 , soft bitumen claim 24 , modified bitumen claim 24 , distillation bitumen claim 24 , high-vacuum bitumen claim 24 , polymer-modified bitumen claim 24 , special bitumen claim 24 , industrial bitumen claim 24 , oxidation bitumen claim 24 , hard bitumen claim 24 , blended bitumen claim 24 , cold bitumen claim 24 , fluxed bitumen claim 24 , flux bitumen claim 24 , natural asphalt and any desired mixtures of two or more of the aforesaid compounds.26. The agent in accordance with containing 0.1 to 20% by weight of bitumen.27. The agent in accordance with further containing a mixture of two or more calcium compounds which contains at least 20% by weight calcium oxide and a remainder to 100% by weight being one or more compounds selected from the group of members consisting of calcium hydroxide claim 24 , calcium carbonate claim 24 , and any desired mixtures of the aforesaid compounds.28. The agent in accordance with claim 27 , wherein the mixture of calcium compounds is composed of at least 50% by weight calcium oxide.29. The agent in accordance with containing calcium oxide as the only calcium compound.30. The agent in accordance with claim 27 , wherein the calcium ...

METHOD FOR MANUFACTURING HIGH STRENGTH FLAKE GRAPHITE CAST IRON, FLAKE GRAPHITE CAST IRON MANUFACTURED BY THE METHOD, AND ENGINE BODY COMPRISING THE CAST IRON FOR INTERNAL COMBUSTION ENGINE

The present disclosure relates to a flake graphite cast iron simultaneously having high strength, good machinability, and fluidity, to a method for manufacturing same, and to an engine body comprising the flake graphite cast iron for an internal combustion engine and, more particularly, to a method for manufacturing a flake graphite cast iron, for an engine cylinder block and head having improved castability, a low possibility of the occurrence of chill due to ferroalloy, stable tensile strength and yield strength, and good machinability by adding a trace of strontium in a cast iron including carbon (C), silicon (Si), manganese (Mn), sulfur (S), and phosphorus (P), which are five elements of the cast iron, molybdenum (Mo), a high strengthening additive, and copper (Cu) while controlling the ratio (S/Sr) of the sulfur (S) content to the strontium (Sr) content in the cast ion. 1. A method for manufacturing a high-strength flake graphite cast iron , the method comprising:(i) manufacturing molten cast iron that includes 3.2 to 3.5% of carbon (C), 1.9 to 2.3% of silicon (Si), 0.4 to 0.9% of manganese (Mn), 0.06 to 0.1% of sulfur (S), 0.06% or less of phosphorous (P), 0.6 to 0.8% of copper (Cu), 0.15 to 0.25% of molybdenum (Mo), and a remainder of iron (Fe) with respect to a total weight %;(ii) adding strontium (Sr) to the melted molten cast iron such that a ratio (S/Sr) of the content of the sulfur (S) to the content of the strontium (Sr) is in a range of 16 to 98; and(iii) tapping the molten cast iron in a ladle to put the tapped molten cast iron in a casting mold.2. The method of claim 1 , wherein an additive content of the strontium (Sr) is in a range of 0.001 to 0.005% with respect to a total weight of the molten cast iron.3. The method of claim 1 , wherein the molten cast iron of the step (i) is manufactured by adding 0.6 to 0.8% of copper (Cu) and 0.15 to 0.25% of molybdenum (Mo) to molten cast iron manufactured by melting a cast iron material that includes 3.2 to ...

AGENT FOR TREATING MOLTEN METALS, METHOD FOR THE PRODUCTION AND USE THEREOF

The invention relates an agent for treating molten metals, in particular for desulphurizing pig iron melts, containing at least calcium oxide, optionally at least one other element in the elementary and/or bound state, selected from the group including alkali metals, alkaline earth metals or earth metals and bitumes in an amount between 1-30 wt.-% or a mineral oil and/or paraffin oil, in an amount between 1-25 wt. %. Said agent is suitable, in particular, for treating pig iron melts, according to a mono-, co- or multi-injection method, but also for stirring, for example, according to the KR stirring method. 118.-. (canceled)19. Use of an agent for dephosphorization of a pig iron melt by blowing in , stirring in or adding the fine-grained agent into a treatment vessel , wherein the agent at least contains calcium oxide , and either i) bitumen in a quantity of 1 to 30% by weight or ii) a mineral oil and/or paraffinic oil , in a quantity of 1 to 25% by weight.20. Use of the agent in accordance with claim 19 , wherein the agent further comprises at least one further element in an elementary and/or bound state claim 19 , said at least one further element being selected from the group containing alkaline metals claim 19 , alkaline earth metals and earth metals.21. Use of the agent in accordance with claim 19 , wherein the agent additionally contains at least one further element in the elementary and/or bound state selected from the group containing calcium carbide claim 19 , calcium cyanamide claim 19 , calcium hydroxide claim 19 , calcium carbonate claim 19 , calcium sulfate claim 19 , dolomite claim 19 , barium oxide claim 19 , barium sulfate and alkaline carriers.22. Use of the agent in accordance with claim 19 , wherein the agent additionally contains an agent for improving the flowability.23. Use of the agent in accordance with claim 22 , wherein the agent for improving the flowability is selected from the group of members containing saturated claim 22 , ...

METHOD FOR PRODUCING MOLD STEEL, MOLD STEEL, METHOD OF PRODUCING PRE-HARDENED MOLD MATERIAL, AND PRE-HARDENED MOLD MATERIAL

A method of producing a mold steel, the method including a first process of preparing a molten steel A that is obtained after vacuum refining and has a component composition including from 0.005% to 0.1% by mass of C, from 1.0% to 5.0% by mass of Ni, from 3.0% to 8.0% by mass of Cr, more than 0% but less than or equal to 2.0% by mass of Mo, more than 0% but less than or equal to 3.5% by mass of Cu, and more than 0% but less than or equal to 2.0% by mass of Al, in which an amount of O is 0.005% by mass or less and an amount of N is 0.03% by mass or less; a second process of reducing the amount of O and the amount of N in the molten steel A, by slag refining the molten steel A, to obtain a molten steel B; and a third process of casting the molten steel B, is provided. 1. A method of producing a mold steel , the method comprising:a first process of preparing a molten steel A that is obtained after vacuum refining and has a component composition comprising from 0.005% to 0.1% by mass of C, from 1.0% to 5.0% by mass of Ni, from 3.0% to 8.0% by mass of Cr, more than 0% but less than or equal to 2.0% by mass of Mo, more than 0% but less than or equal to 3.5% by mass of Cu, and more than 0% but less than or equal to 2.0% by mass of Al, wherein an amount of O is 0.005% by mass or less and an amount of N is 0.03% by mass or less;a second process of reducing the amount of O and the amount of N in the molten steel A, by slag refining the molten steel A, to obtain a molten steel B; anda third process of casting the molten steel B.2. The method of producing a mold steel according to claim 1 , wherein the molten steel B comprises more than 0% but less than or equal to 0.05% by mass of S.3. The method of producing a mold steel according to claim 1 , wherein claim 1 , in the molten steel B claim 1 , the amount of O is 0.001% by mass or less and the amount of N is 0.01% by mass or less.4. The method of producing a mold steel according to claim 1 , wherein the molten steel B comprises ...

INOCULANT WITH SURFACE PARTICLES

The present invention relates to a particulate inoculant for treating liquid cast-iron, comprising, on the one hand, support particles made of a fusible material in the liquid cast-iron, and on the other hand, surface particles made of a material that promotes the germination and the growth of graphite, disposed and distributed in a discontinuous manner at the surface of the support particles, the surface particles presenting a grain size distribution such that their diameter d50 is smaller than or equal to one-tenth of the diameter d50 of the support particles. 1. A powdered particulate inoculant for treating liquid cast-iron , comprising:support particles made of a fusible material in the liquid cast-iron, andsurface particles made of a material that promotes germination and growth of graphite, disposed and distributed in a discontinuous manner at a surface of the support particles,wherein the surface particles present a grain size distribution such that their diameter d50 is smaller than or equal to one-tenth of a diameter d50 of the support particles.2. The inoculant according to claim 1 , wherein the support particles are made of a material that promotes the association of carbon with iron in the form of graphite.3. The inoculant according to claim 1 , wherein the support particles are made of a silicon and/or carbon based material.4. The inoculant according to claim 3 , wherein the support particles contain at least 40% by mass of silicon relative to the mass of said particles.5. The inoculant according to claim 1 , wherein the support particles are made from a ferrous alloy.6. The inoculant according to claim 1 , wherein the support particles comprise claim 1 , in an alloyed form claim 1 , at least one additive element between 0.2 and 5% by mass for each additive element claim 1 , relative to the mass of the support particles.7. The inoculant according to claim 1 , wherein the support particles comprise in an alloyed form claim 1 , at least one element for ...

ROTARY DEGASSERS AND COMPONENTS THEREFOR

Disclosed are degassers, couplings, impeller shafts and impellers for use in molten metal. One such coupling transfers gas into an impeller shaft, the coupling having a smooth, tapered internal surface to align with a corresponding surface on the impeller shaft and help prevent gas leakage and to assist in preventing damage to the impeller shaft. Improved impellers for shearing and mixing gas are also disclosed, as is a degasser including one or more of these components. 1. A shaft for use in a rotary degasser , the shaft comprising:a first end, a second end, an outer sidewall, and an inner passage for transferring gas, wherein the first end is tapered, and at least one groove is formed adjacent the tapered first end, wherein the tapered first end mates with an inner tapered portion in a coupling, and one or more retainers that are threadingly received in the coupling are each threadingly received in an opening of the coupling positioned such that each of the one or more retainers is positioned to be received in and to apply pressure to one or more of the grooves, in order to apply driving force from the coupling to the shaft.2. The shaft of that has a plurality of grooves.3. The shaft of that is comprised of graphite.4. The shaft of wherein the grooves are not vertically aligned.5. The shaft of wherein the at least one groove is vertical.6. The shaft of wherein the at least one groove is circular.7. The shaft of that is coupled with a metal coupling having a first claim 1 , tapered end that receives the tapered first end of the shaft and a second end that receives the adjacent portion of the shaft containing the at least one groove claim 1 , the second end including one or more openings through which retainers may be received to contact at least one of the one or more grooves to apply driving force to the shaft.8. The shaft of wherein there is a plurality of grooves and a plurality of openings with each opening corresponding to one groove.9. The shaft of wherein ...

Method for manufacturing manganese raw material and method for manufacturing manganese-containing molten steel

A manufacturing method includes a first pulverization step of compressively pulverizing a manganese oxide-containing material containing at least manganese, calcium, silicon, iron, and phosphorus, which is used as a raw material, to form a composite in which a compound phase of nCaO.P2O5 is combined with at least one phase of a spinel phase and a calcium ferrite phase, which are ferromagnetic materials, and produce a first pulverized manganese oxide-containing material containing the composite; a first magnetic separation step of separating the first pulverized manganese oxide-containing material produced in the pulverization step into a magnetic substance and a non-magnetic substance under a magnetic force; and a step of recovering the non-magnetic substance separated in the first magnetic separation step as a manganese raw material.

Green process for the preparation of pure iron

The present invention relates to an eco-friendly and single step process for the preparation of high purity iron by using hydrogen plasma in a suitable smelting reactor furnace. Reduction of iron oxide in excess of 99% can be achieved by reducing the iron ore in hydrogen plasma smelting system. The product quality is greatly improved as there is no instance of coke inclusion which otherwise would have carried carbon, sulphur, phosphorous, silica, etc. with it. In addition, this greatly diminishes carbon dioxide emission thereby making the process highly eco-friendly in nature. Apart from these, the process produces water as the only by-product. The process takes care of the green house effect with the non-involvement of gases like carbon dioxide, carbon monoxide during the operation. Thus, the present process is developed to produce high pure iron in a hydrogen plasma reactor without using carbon as reductant which thereby reduces the carbon dioxide emission drastically.

Spheroidal Graphite Cast Iron Excellent in Gas Defect Resistance

There is provided with spheroidal graphite cast iron having excellent gas defect resistance where gas defects such as pinholes attributable to the free N are small in number and having mechanical characteristics and machinability equal to or greater than the conventional ones. The spheroidal graphite cast iron consists of, in mass ratio, C: 3.3 to 4%; Si: 2 to 3%; P: not more than 0.05%; S: not more than 0.02%; Mn: not more than 0.8%; Cu: not more than 0.8% (0 is not included); Mg: 0.02 to 0.06%; Ti: 0.01 to 0.04%; V: 0.001 to 0.01%; Nb: 0.001 to 0.01%; and N: 0.004 to 0.008%, with the remnant substantially consisting of Fe and an inevitable impurity. 15-. (canceled)6. A spheroidal graphite cast iron excellent in gas defect resistance consisting of , in mass ratio:C: 3.3 to 4%;Si: 2 to 3%;P: not more than 0.05%;S: not more than 0.02%;Mn: not more than 0.8%;Cu: not more than 0.8% (0 is not included);Mg: 0.02 to 0.06%;Ti: 0.01 to 0.04%;V: 0.001 to 0.01%;Nb: 0.001 to 0.01%; andN: 0.004 to 0.008%,with the remnant substantially consisting of Fe and an inevitable impurity.7. The spheroidal graphite cast iron according to claim 6 , {'br': None, '0.8≤(0.29Ti+0.27V+0.15Nb)/N≤2.0\u2003\u2003(1)'}, 'wherein the spheroidal graphite cast iron contains, in mass ratio, 0.015 to 0.045% Ti, V and Nb in total and further, contains Ti, V, Nb and N so as to satisfy the following expression (1)here, the element symbols in the expression (1) represent the contents [mass ratio (%)] of the elements in the spheroidal graphite cast iron.8. The spheroidal graphite cast iron according to claim 6 ,wherein the spheroidal graphite cast iron contains, in mass ratio, not less than 0.005% P and not less than 0.005% S.9. The spheroidal graphite cast iron according to claim 6 ,wherein the spheroidal graphite cast iron contains, in mass ratio, not less than 0.2% Mn and not less than 0.1% Cu.10. The spheroidal graphite cast iron according to claim 6 ,wherein the spheroidal graphite cast iron is not less ...

METHOD FOR REMOVING PHOSPHORUS FROM PHOSPHORUS-CONTAINING SUBSTANCE

Proposed is a method for removing phosphorus from a phosphorus-containing substance which is applicable in an industrial scale so as to effectively reduce phosphorus contained in the phosphorus-containing substance. In this method, the phosphorus-containing substance used as a raw material for metal smelting or metal refining is reacted with a nitrogen-containing gas at a treatment temperature T (° C.) which is lower than a melting temperature (T) of the substance, so that phosphorus is removed preferably in the form of phosphorus nitride (PN). In this regard, a nitrogen partial pressure and an oxygen partial pressure in the nitrogen-containing gas are preferably controlled, thereby reducing a load of dephosphorization process, for example. 1. A method for removing phosphorus from a phosphorus-containing substance ,{'sub': 'm', 'characterized in that the phosphorus-containing substance used as a raw material for metal smelting or metal refining is reacted with a nitrogen-containing gas at a treatment temperature T (° C.) which is lower than a melting temperature (T) of the substance.'}2. The method for removing phosphorus from a phosphorus-containing substance according to claim 1 ,wherein phosphorus nitride (PN) is formed by a reaction of the phosphorus-containing substance with the nitrogen-containing gas and removed.3. The method for removing phosphorus from a phosphorus-containing substance according to claim 1 ,{'sub': N2', 'O2, 'wherein the reaction of the phosphorus-containing substance with the nitrogen-containing gas is performed under control of a nitrogen partial pressure Pand an oxygen partial pressure Pin the nitrogen-containing gas.'}4. The method for removing phosphorus from a phosphorus-containing substance according to claim 1 ,{'sub': 'N2', 'claim-text': [{'br': None, '[Formula 1]'}, {'br': None, 'i': 'P', 'sub': 'N2', '0.2≤≤0.9\u2003\u2003(1)'}], 'wherein the nitrogen partial pressure P(atm) in the nitrogen-containing gas is controlled to satisfy ...

Method for producing die-cast product of spherical graphitic cast iron including ultrafine spherical graphite, and spheroidizing treatment agent

The present invention provides a die-cast product producing method and a spheroidizing agent of a spherical graphite cast iron with ultrafine spherical graphite by simple method and good reproducibility. The present invention provides a sand mold producing method and a spheroidizing agent capable of producing an ultrafine spherical graphite cast iron with good reproducibility even in a sand mold thin walled spherical graphite cast iron, which has solidification cooling conditions equivalent to those of a metal mold. The present invention provides a producing method of a die-cast product of a spherical graphite cast iron using a spheroidizing agent, in which a C amount is 0.5 mass % or more, a total nitrogen amount N is 150 ppm (by mass) or less, and a nitrogen amount generated during melting is 15 ppm (by mass) or less, in a producing method of a sand mold cast product of a thin walled spherical graphite cast iron having a melting process, a spheroidizing process, an inoculation process, and a casting process.

PHYSICAL PROPERTY IMPROVEMENT OF IRON CASTINGS USING CARBON NANOMATERIALS

A method is provided for fabricating iron castings for metallic components. The method for fabricating the iron castings may include forming a molten solution by melting carbon and iron and combining carbon nanomaterials with the molten solution. A first portion of the carbon nanomaterials combined with the molten solution may be dispersed therein. The method may also include cooling the molten solution to solidify at least a portion of the carbon thereof to fabricate the iron castings. The first portion of the carbon nanomaterials may be dispersed in the iron castings. 1. A method for fabricating iron castings for a metallic component , comprising:forming a molten solution by melting carbon and iron;combining carbon nanomaterials with the molten solution, a first portion of the carbon nanomaterials dispersed in the molten solution; andcooling the molten solution to solidify at least a portion of the carbon thereof, thereby fabricating the iron castings, the first portion of the carbon nanomaterials dispersed in the iron castings.2. The method of claim 1 , further comprising dissolving a second portion of the carbon nanomaterials in the molten solution claim 1 , the second portion of the carbon nanomaterials having a defect density greater than a defect density of the first portion of the carbon nanomaterials.3. The method of claim 1 , wherein the carbon nanomaterials are selected from the group consisting of carbon nanotubes claim 1 , buckyballs claim 1 , fullerenes claim 1 , and combinations thereof.4. The method of claim 1 , further comprising functionalizing the carbon nanomaterials such that one or more chemical moieties are associated therewith.5. The method of claim 1 , wherein the carbon nanomaterials increase nucleation sites for the solidification of the at least a portion of the carbon dissolved in the molten solution.6. The method of claim 1 , wherein the carbon nanomaterials comprise carbon nanotubes claim 1 , the carbon nanotubes having a tubular ...

ROTARY DEGASSERS AND COMPONENTS THEREFOR

Disclosed are degassers, couplings, impeller shafts and impellers for use in molten metal. One such coupling transfers gas into an impeller shaft, the coupling having a smooth, tapered internal surface to align with a corresponding surface on the impeller shaft and help prevent gas leakage and to assist in preventing damage to the impeller shaft. Improved impellers for shearing and mixing gas are also disclosed, as is a degasser including one or more of these components. 1. A shaft that cannot be threadingly connected to a corresponding coupling for use in a rotary degasser , the shaft comprising:a first end, a second end, an outer sidewall, a center portion between the first end and the second end, and an inner passage for transferring gas, wherein the first end is tapered and not threaded, and one or more grooves that are not threads formed adjacent the tapered first end between the center portion and the tapered first end; wherein the shaft is configured to be received in the corresponding coupling so that the tapered first end mates with an inner tapered portion in the coupling, and one or more retainers are received in the coupling such that each is positioned to be pressed against one of the one or more grooves, in order to apply driving force from the coupling to the shaft.2. The shaft of that has a plurality of grooves.3. The shaft of wherein the grooves are not vertically aligned.4. The shaft of wherein the at least one groove is vertical.5. The shaft of wherein the at least one groove is circular.6. The shaft of wherein at least two of the plurality of grooves are each configured to align with an opening on the coupling.7. The shaft of wherein the second end of the shaft is threaded.8. The shaft of wherein the second end of the shaft is configured to threadingly connect to a rotor.9. The shaft of wherein the taper is at an angle between 20° and 45°.10. The shaft of wherein the one or more grooves are not vertically aligned.11. The shaft of wherein the one ...

DEVICE AND METHOD FOR CONTINUOUS DESULPHURISATION OF LIQUID HOT METAL

A device and a method for continuous desulphurisation of liquid iron provided by a blast furnace process or a direct reduction process. 1. A device for continuous desulphurisation of liquid iron comprising a desulphurisation reactor or a plurality of consecutive desulphurisation reactors ,wherein the desulphurisation reactor or reactors each comprise an entry section for receiving liquid iron from liquid iron production means or from the desulphurisation reactor immediately preceding the subsequent desulphurisation reactor, and a reaction section for removing the sulphur from the liquid iron,wherein the entry section and the reaction section in the desulphurisation reactors act as communicating vessels, wherein a passage is provided between the entry section and the reaction section to allow, in use, the liquid iron to flow from the entry section to the reaction section,wherein supply means for the liquid iron into the first or only desulphurisation reactor are provided in the entry section, and wherein means for introducing reagents into the liquid iron in the reaction section or in the entry section are provided and wherein the means for introducing reagents into the liquid iron comprise a submerged lance, and (i) a return passage is provided between the reaction section of desulphurisation reactor and the entry section of said desulphurisation reactor, and/or', '(ii) wherein a return passage is provided between the first and the second desulphurisation reactor, wherein the return passage connects the entry section of the second reactor to the reaction section of the first desulphurisation reactor,, 'wherein an outlet is provided in the reaction section, to allow desulphurised liquid iron to exit the reaction section, and wherein'}to increase, in use, the residence time of the liquid iron in the device.2. The device according to claim 1 , wherein slag removal means are provided for separating the slag that claim 1 , in use claim 1 , is floating on top of the ...

METHOD AND APPARATUS FOR DEPHOSPHORISING LIQUID HOT METAL SUCH AS LIQUID BLAST FURNACE IRON

A method for dephosphorising liquid hot metal, such as liquid blast furnace iron or liquid metal with a composition equivalent to blast furnace iron. A pouring stream of the hot metal discharges from a vessel containing the hot metal into a refining unit. In the refining unit one or more streams of additives for forming a molten slag and one or more gaseous streams for breaking up the pouring stream of hot metal into molten metal droplets are directed into the pouring stream. One or more of the gaseous streams and/or one or more of the streams of additives includes oxygen in gaseous form or in compounded form, to allow a dephosphorisation reaction between the metal droplets. The oxygen and molten slag during the fall of the molten droplets before collection into a receiving vessel positioned below the refining unit. An apparatus for performing the method. 1. Method for dephosphorising liquid hot metal comprising ,discharging a pouring stream of the hot metal from a vessel containing the hot metal into a refining unit,in the refining unit directing into the pouring stream one or more streams of additives for forming a molten slag and one or more gaseous streams for breaking up the pouring stream of hot metal into molten metal droplets,wherein one or more of the gaseous streams and/or one or more of the streams of additives comprises oxygen in gaseous form or in compounded form, to allow a dephosphorisation reaction between the metal droplets, the oxygen and the molten slag during the fall of the molten droplets before being collected into a receiving vessel positioned below the refining unit.2. Method according to , wherein the liquid hot metal is desulphurised prior to dephosphorising according to .3. Method according to claim 1 , wherein the one or more streams of additives and/or the one or more gaseous streams are provided by means of one or more individual multi purpose burner modules or nozzles containing one or more injection features for injecting one or more ...

METHOD AND DEVICE FOR TREATING A METAL OR A MOLTEN METAL ALLOY USING AN ADDITION AGENT

Method and device for treating a metal or a molten metal alloy using an addition agent The invention relates to a method and device for treating a metal or a molten metal alloy using an addition agent, wherein the addition agent () is deposited in a local cavity () arranged at the bottom of a treatment ladle () and surrounded by a small protruding wall (), and a closing member () connected to movement means () is able to form, with the bottom of the treatment ladle, in a low insulating position, a chamber () including said local cavity and comprising an intermediate annular space () around the small wall. Application to the treatment of a molten cast iron using pure magnesium or a magnesium alloy. 1. A process for treating a molten metal or metal alloy using an additive agent , comprising:{'b': 37', '10', '2', '11, 'depositing the additive agent () in at least one local cavity () made in the bottom of a treatment ladle () and delimited by a low annular wall () that protrudes with respect to this bottom,'}{'b': 13', '17', '4', '2', '23', '11', '25', '10, 'lowering down to a bottom position at least one closure member () comprising a closure bell () so that this closure bell surrounds, at a distance, said low wall and so that its frontal edge bears against the bottom () of the treatment ladle (), creating an annular bearing zone () around and at a distance from the low wall () and that is located below the upper edge of the low wall, forming a chamber () that includes said local cavity (),'}{'b': '38', 'at least partially filling the treatment ladle with the molten metal (),'}{'b': '13', 'raising the closure member () so as to bring the molten metal and the additive agent into contact.'}2. An application of the process as claimed in claim 1 , for the treatment of a molten cast iron using pure magnesium or a magnesium alloy.3. An application of the process as claimed in claim 1 , for the treatment of a molten steel using calcium metal claim 1 , a ferrosilicon or a ...

SPHERICAL GRAPHITE CAST IRON SEMI-SOLID CASTING METHOD AND SEMI-SOLID CAST PRODUCT

The present invention provides a casting method and cast product of spherical graphite cast iron, in which, even with a small modulus, there is no chill, the spherical graphite in the tissue is further made ultrafine, the dispersion of the particle diameter is small, and the number of the particles is several times that of the conventional one in the as cast state where heat treatment is not carried out. 1. A semi-solidification casting method for casting a spheroidal graphite cast iron cast product comprises;a melting step in which a raw material made of cast iron is heated and melted to obtain a molten metal,a spheroidizing treatment step of spheroidizing the molten metal,an inoculation step of inoculating the molten metal, anda casting step of pouring the molten metal after inoculation from the pouring port, passing through the runner, and filling the product space through the gate,wherein the amount of nitrogen in the molten metal is adjusted so that the amount of nitrogen generated during melting of the casting is 0.9 ppm (mass) or less,the pouring being performed at a temperature between (liquidus temperature+10° C.) and (liquidus line temperature+40° C.), andthe molten metal poured from the pouring port is cooled in the runner and filled at the gate at a temperature within the solid-liquid coexistence temperature region.2. A semi-solidification casting method according to claim 1 , wherein the cooling rate of the molten metal from the pouring temperature to the liquidus temperature after the pouring is 20° C./sec or more.3. A semi-solidification casting method according to claim 1 , wherein a temperature in the solid-liquid coexistence temperature region is 1140 to 1170° C.4. A semi-solidification casting method according to claim 1 , wherein after the filling claim 1 , pressurization is performed.5. A semi-solidification casting method according to comprise claim 1 ,a step of heating a raw material to obtain a molten metal,a step of heating the molten metal ...

GRAY CAST IRON INOCULANT

A ferrosilicon inoculant for gray cast iron containing between 0.1 to 10% by weight strontium, less than 0.35% by weight calcium, 1.5 to 10% by weight aluminum and 0.1 to 15% zirconium. The inoculant, method for producing the inoculant, method for inoculating the melt and a gray cast iron inoculated with the inoculant are covered. 1. A ferrosilicon inoculant for cast iron consisting essentially of about 15 to 90% by weight silicon; about 0.1 to 10% by weight strontium; less than about 0.35% by weight calcium; about 1.5 to 10.0% by weight aluminum; about 0.1 to 15% by weight zirconium , and a balance of iron , with residual impurities in the ordinary amount.2. The ferrosilicon inoculant according to claim 1 , wherein the silicon is present in an amount of about 40 to 80% by weight.3. The ferrosilicon inoculant according to claim 1 , wherein the aluminum is present in about 2-6% by weight.4. The ferrosilicon inoculant according to claim 1 , wherein the aluminum is present in about 2-4% by weight.5. A method for inoculating gray cast iron comprising adding the ferrosilicon inoculant of to molten cast iron.6. The method of claim 5 , wherein no other inoculant is added to the molten gray cast iron in the transfer ladle.7. The method of claim 5 , wherein no other inoculant is added to the molten gray cast iron in the pouring unit.8. The method of claim 5 , wherein no other inoculant is added to the molten gray cast iron in in the pouring stream to the mold.9. The method of claim 5 , wherein a single addition of the ferrosilicon inoculant of is made to the molten cast iron in the poring unit during the casting process. The invention relates to the manufacture of cast iron and more particularly to an inoculant for gray cast iron to improve the overall properties thereof.Cast iron is typically produced in a cupola or induction furnace, and generally has about 2 to 4 percent carbon. The carbon is intimately mixed in with the iron and the form which the carbon takes in the ...

SPHEROIDIZING TREATMENT METHOD FOR MOLTEN METAL OF SPHEROIDAL GRAPHITE CAST IRON

A graphite spheroidizing agent containing: 30-80 wt % of Si; Mg; RE (rare earth element) which comprises Ce with a purity level of 80-100 wt % or La with a purity level of 80-100 wt %; Ca; and Al is used. The graphite spheroidizing agent is added so as to satisfy the conditions that an amount of RE equivalent to 0.001-0.009 wt % of the total weight of the molten metal, an amount of Ca equivalent to 0.001-0.02 wt % of the total weight of the molten metal, and an amount of Al equivalent to 0.001-0.02 wt % of the total weight of the molten metal are added to the molten metal, and that the molten metal contains 0.03-0.07 wt % of Mg after the graphite spheroidizing treatment. It is possible to suppress crystallization of chunky graphite in a thick section of spheroidal graphite cast iron and deterioration of mechanical properties, with a low cost. 1. A spheroidizing treatment method for spheroidizing graphite by addition of a graphite spheroidizing agent to a molten metal , wherein:the graphite spheroidizing agent contains: 30-80 wt % of Si; Mg; RE (rare earth element) which comprises Ce with a purity level of 80-100 wt % or La with a purity level of 80-100 wt %; Ca; and Al; andthe graphite spheroidizing agent is added so as to satisfy the conditions that an amount of RE equivalent to 0.001-0.009 wt % of the total weight of the molten metal, an amount of Ca equivalent to 0.001-0.02 wt % of the total weight of the molten metal, and an amount of Al equivalent to 0.001-0.02 wt % of the total weight of the molten metal are added to the molten metal, and that the molten metal contains 0.03-0.07 wt % of Mg after the graphite spheroidizing treatment.2. The spheroidizing treatment method according to claim 1 , wherein the graphite spheroidizing agent further contains S claim 1 , and the graphite spheroidizing agent is added such that an amount of RE equivalent to 0.002-0.008 wt % of the total weight of the molten metal is added claim 1 , and a ratio of the amount of RE added to ...

NODULAR GRAPHITE CAST IRON AND METHOD FOR FABRICATING VANE USING THE SAME

A nodular graphite cast iron, a method for fabricating a vane for a rotary compressor using nodular graphite cast iron, and a vane for a rotary compressor using the same are provided. The nodular graphite cast iron includes 3.4 wt % to 3.9 wt % of carbon (C), 2.0 wt % to 3.0 wt % of silicon (Si), 0.3 wt % to 1.0 wt % of manganese (Mn), 0.1 wt % to 1.0 wt % of chromium (Cr), 0.04 wt % to 0.15 wt % of titanium (Ti), less than 0.08 w % of phosphorus (P), less than 0.025 wt % of sulphur (S), 0.03 wt % to 0.05 wt % of magnesium (Mg), 0.02 wt % to 0.04 wt % of rare earth resource, iron (Fe) and impurities as the remnants, and includes a bainite matrix structure, nodular graphite, and 15 vol % to 35 vol % of carbide. 1. A method for fabricating a vane for a compressor , the method comprising:melting a molten metal including 3.4 wt % to 3.9 wt % of carbon (C), 2.0 wt % to 3.0 wt % of silicon (Si), 0.3 wt % to 1.0 wt % of manganese (Mn), 0.1 wt % to 1.0 wt % of chromium (Cr), 0.04 wt % to 0.15 wt % of titanium (Ti), less than 0.08 w % of phosphorus (P), less than 0.025 wt % of sulphur (S), 0.03 wt % to 0.05 wt % of magnesium (Mg), 0.02 wt % to 0.04 wt % of rare earth resource, iron (Fe) and impurities as the remnants;injecting the molten metal into a mold in a casting operation;cooling the mold to obtain a semi-product including nodular graphite and 15 vol % to 35 vol % of carbide;grinding the cooled semi-product to have a predetermined shape in a grinding operation; andthermally treating the grinded product in a heat treatment to transform an austenite matrix structure into a bainite matrix structure.2. The method of claim 1 , further comprising: taking out the molten metal; andapplying a spheroidizing agent to the molten metal.3. The method of claim 1 , wherein the heat treatment comprises:heating the grinded semi-product to 880° C. to 950° C.;maintaining the semi-product at the temperature for 30 to 90 minutes;maintaining the semi-product in a liquid having a temperature ...

Cored wire for out-of-furnace treatment of metallurgical melts

A wire for out-of-furnace treatment of metallurgical melts comprises a metallic sheath which encloses a core comprising at least one element selected from the group consisting of Ca, Ba, Sr, Mg, Si and Al, wherein at least one layer of a composite coating is applied to an inner and/or outer surface of said sheath, which coating consists of a lacquer paint material and contains high-melting ultrafine particles selected from compounds of metal carbides and/or nitrides and/or carbonitrides and/or silicides and/or borides. The composite coating comprises a protector material, for which ferroalloys and/or flux agents are used. The metals contained in the high-melting compounds are titanium and/or tungsten and/or silicon and/or magnesium and/or niobium and/or vanadium. Said coating is applied evenly onto the surface of the sheath.

CASTING SOLIDIFICATION ANALYSIS METHOD, CASTING METHOD, AND ELECTRONIC PROGRAM

A casting solidification analysis method, which can analyze positions of shrinkage cavities more accurately than in the past, a casting method using the above method, and an electronic program are provided. 1. A casting solidification analysis method , wherein an amount of expansion/shrinkage for each solidification step length separated by inflection points in a cooling curve is determined , by setting a solid phase ratio at a completion of pouring to 0 , setting a solid phase ratio at an end of solidification to 1.0 , and determining the expansion/shrinkage amount for the each solidification step length by proportionally distributing the each solidification step length to the total solid phase ratio length.2. The casting solidification analysis method according to claim 1 , wherein a cast product is a thick cast product having a thick part of 50 mm or more.3. The casting solidification analysis method according to claim 1 , wherein the casting is a spheroidal graphite cast iron casting.4. A casting method for performing casting based on the result of analysis by the casting solidification analysis method according to any one of .5. An electronic program comprised from; a step claim 1 , in which inflection points are determined from the cooling curve claim 1 , and each solidification step length separated by the inflection points is determined; and a step claim 1 , in which a solid phase ratio at a completion of pouring is set to 0 claim 1 , a sold phase ratio at an end of solidification is set to 1.0 claim 1 , and an expansion/shrinkage amount for the each solidification step length is determined by proportionally distributing the each solidification step length to the total solid phase ratio length.6. A solidification analysis method claim 1 , which analyses shrinkage and expansion temperatures at an early stage of solidification and shrinkage temperature at an end of solidification by connecting a latent heat pattern released during solidification by a straight ...

METHOD FOR TREATING MOLTEN CAST IRON

A method for treating molten cast iron includes, performing an inoculation treatment to the molten cast iron, with the use of an inoculant containing: 15 to 80 wt % Si; either 80 to 100 wt % purity La or 80 to 100 wt % purity Ce as RE; Ca; Al; and the balance Fe with inevitable impurities, by adding the inoculant to the molten cast iron such that: the addition amount of La or Ce relative to the molten cast iron is 0.001 to 0.009 wt %; the addition amount of Ca relative to the molten cast iron is 0.001 to 0.02 wt %; and the addition amount of Al relative to the molten cast iron is 0.001 to 0.02 wt %. 1. A method for treating molten cast iron including , performing an inoculation treatment to the molten cast iron , with the use of an inoculant containing: 15 to 80 wt % Si; either 80 to 100 wt % purity La or 80 to 100 wt % purity Ce as RE; Ca; Al; and the balance Fe with inevitable impurities , by adding the inoculant to the molten cast iron such that: the addition amount of La or Ce relative to the molten cast iron is 0.001 to 0.009 wt %; the addition amount of Ca relative to the molten cast iron is 0.001 to 0.02 wt %; and the addition amount of Al relative to the molten cast iron is 0.001 to 0.02 wt %.2. The method for treating molten cast iron according to claim 1 , wherein claim 1 , in the inoculant claim 1 , the content of the Si is 30 to 80 wt % claim 1 , the content of said 80 to 100 wt % purity La or said 80 to 100 wt % purity Ce is 0.1 to 0.6 wt % claim 1 , the content of the Ca is 0.1 to 1.3 wt % claim 1 , and the content of the Al is 0.1 to 2.0 wt %.3. The method for treating molten cast iron according to claim 1 , wherein in the inoculant claim 1 , the content of the Si is 30 to 80 wt/% claim 1 , the content of said 80 to 100 wt % purity La or said 80 to 100 wt % purity Ce is 0.3 to 1.8 wt % claim 1 , the content of the Ca is 0.1 to 6.0 wt % claim 1 , and the content of the Al is 0.1 to 6.0 wt %.4. The method for treating molten cast iron according to claim ...

CAST IRON INOCULANT AND METHOD FOR PRODUCTION OF CAST IRON INOCULANT

An inoculant for the manufacture of cast iron with lamellar, compacted or spheroidal graphite is disclosed. The inoculant has a particulate ferrosilicon alloy having about 40 to 80 wt % silicon, about 0.1 to 10 wt % calcium, 0 and 10% by weight of rare earths, for example cerium and/or lanthanum, and up to 5 wt % aluminium the balance being iron and incidental impurities in the ordinary amount, wherein the inoculant additionally has 0.1 to 10 wt %, based on the total weight of inoculant, antimony oxide where said antimony oxide is in particulate form and is mixed or blended with the ferrosilicon alloy particles, or is simultaneously added to cast iron together with the particulate ferrosilicon alloy particles. 1. An inoculant for the manufacture of cast iron with lamellar , compacted or spheroidal graphite wherein said inoculant comprises a particulate ferrosilicon alloy comprising between about 40 to 80 wt % silicon , between about 0.1 to 10 wt % calcium , between 0 and 10% by weight of rare earths , for example cerium and/or lanthanum , and up to 5 wt % aluminium the balance being iron and incidental impurities in the ordinary amount , wherein said inoculant additionally comprises 0.1 to 10 wt % SbO , based on the total weight of inoculant , where said SbOis in particulate form.2. Inoculant according to claim 1 , wherein the ferrosilicon alloy comprises between 45 and 60% by weight of silicon.3. Inoculant according to claim 1 , wherein the ferrosilicon alloy comprises between 60 and 80% by weight of silicon.4. Inoculant according to claim 1 , wherein the ferrosilicon alloy comprises between 0.5 and 5% by weight of calcium.5. Inoculant according to claim 1 , wherein the ferrosilicon alloy comprises between 0.5 and 5% by weight aluminum.6. Inoculant according to claim 1 , wherein the ferrosilicon alloy comprises up to 6% by weight of rare earths.7. Inoculant according to claim 1 , wherein the inoculant comprises 0.2 to 5% by weight of particulate SbO.8. Inoculant ...

MOLTEN IRON REFINING METHOD AND DEVICE THEREOF

Provided are a molten metal refining device and method. The molten metal refining method includes: preparing molten metal; dipping an impeller into the molten metal; supplying a liquid dephosphorization agent on top of the molten metal; and stirring the molten metal by rotating the impeller, wherein a solid dephosphorization agent in a powder state is supplied through the lower portion of the impeller in the stirring of the molten metal, thereby improving the stirring efficiency of the molten metal and efficiently controlling the phosphorus concentration in the molten metal. 1. A device for refining molten metal , comprising:an impeller extending in a vertical direction over a ladle in which the molten metal is charged; anda liquid dephosphorization agent supply part disposed over the ladle to supply a molten state liquid dephosphorization agent to a top portion of the molten metal, an impeller body;', 'blades provided on an upper outer circumferential surface of the impeller body;', 'a supply pipe which is disposed inside the impeller body along a lengthwise direction of the impeller body and through which a solid dephosphorization agent in a powder state and a transfer gas are supplied; and', 'blowing nozzles partially passing through a lower portion of the impeller body and communicating with the supply pipe., 'wherein the impeller comprises2. The device of claim 1 , wherein the blades are positioned above approximately the midpoint of a total depth of the molten metal claim 1 , and the blowing nozzles are positioned under approximately the midpoint of the total depth of the molten metal.3. The device of claim 2 , wherein the blades are disposed in a region of approximately 10% to approximately 30% with respect to a total depth of the molten metal from a molten metal surface of the molten metal.4. The device of claim 1 , wherein the liquid dephosphorization agent supply part is connected to a discharge pipe provided with a heater to heat the liquid ...

Method and apparatus for the production of cast iron, cast iron produced according to said method

A method for the production of cast iron starting from pre-reduced iron ore (DRI) with an electric arc furnace includes the steps of preparing a charge of pre-reduced iron ore DRI having a metallization higher than 90% and containing over 2.8% by weight of carbon, wherein at least 80% of the carbon is combined with the iron to form iron carbide FeC; charging the charge of pre-reduced iron ore into the electric arc furnace; and melting the DRI charge to form liquid cast iron having at least 80% by weight of actual carbon content deriving from the carbon in the charge of pre-reduced iron ore, the melting step being in a reducing atmosphere and in a melting chamber of the electric arc furnace subjected to a positive internal pressure generated by the gases produced by reduction reactions that develop during melting. 1. A method for production of cast iron starting from pre-reduced iron ore (DRI) with an electric arc furnace (EAF) , comprising the following steps:{'sub': '3', 'a. preparing a charge of the pre-reduced iron ore (DRI) having a metallization higher than 90% and containing up to 6.5% by weight of carbon, wherein at least 80% of said carbon is combined with iron to form iron carbide (FeC);'}b. charging the charge of the pre-reduced iron ore (DRI) into the electric arc furnace (EAF) without adding free carbon; andc. melting the DRI charge to form liquid cast iron,wherein said liquid cast iron has a predetermined actual content of carbon, at least 80% by weight of said actual carbon content of the liquid cast iron deriving from the carbon in the charge of the pre-reduced iron ore (DRI), andwherein step c. is carried out in a reducing atmosphere and in a melting chamber of the electric arc furnace (EAF) subjected to a positive internal pressure generated by gases produced by reduction reactions that develop in step c.2. The method according to claim 1 , wherein at least 90% of said carbon in the charge of the pre-reduced iron ore (DRI) is combined with iron as ...

TOP-BLOWING LANCE AND METHOD FOR REFINING MOLTEN IRON USING THE SAME

A top-blowing lance includes a refining oxygen gas blowing nozzle having a plurality of ejection openings through which oxygen gas is blown into an iron bath in a reaction vessel, the ejection openings being disposed along a circular orbit at intervals, and a burner nozzle having an axis coaxial with the central axis of the circular orbit, forming a flame inside the refining oxygen gas blowing nozzle, and having ejection openings for blowing a powder heated by the flame into the iron bath, wherein an indicator A that indicates the positional relationship between the ejection openings of the refining oxygen gas blowing nozzle and the ejection openings of the burner nozzle satisfies the specified conditions. 111.-. (canceled)12. A top-blowing lance having a burner function , comprising:a refining oxygen gas blowing nozzle having a plurality of ejection openings through which oxygen gas is blown into an iron bath in a reaction vessel, the ejection openings being disposed along a circular orbit at intervals; anda burner nozzle having an axis coaxial with the central axis of the circular orbit, forming a flame inside the refining oxygen gas blowing nozzle, and having ejection openings that blow a powder heated by the flame into the iron bath, {'br': None, 'i': A=', 'R−r−d/', 'L+, '1.7(2)/tan(θ−12°)−0.0524>0'}, 'wherein an indicator A that indicates a positional relationship between the ejection openings of the refining oxygen gas blowing nozzle and the ejection openings of the burner nozzle satisfieswhere R denotes a pitch circle radius of the ejection openings of the refining oxygen gas blowing nozzle (mm),r denotes a radius of the ejection openings of the burner nozzle (mm),d denotes a diameter of the ejection openings of the refining oxygen nozzle (mm),θ denotes an angle (inclination) between an axis of the refining oxygen gas blowing nozzle and a central axis of the circular orbit (°), andL denotes a lance height (mm).13. The top-blowing lance according to claim 12 , ...

Cast iron inoculant and method for production of cast iron inoculant

An inoculant for manufacturing cast iron with lamellar, compacted or spheroidal graphite is disclosed. The inoculant has a particulate ferrosilicon alloy 40 and 80% by weight of silicon, 0.5 and 5% by weight of calcium and/or strontium and/or barium, 0 and 10% by weight of rare earths, 0 and 5% by weight of magnesium, less than 5% by weight of aluminium, 0 and 10% by weight of manganese and/or zirconium, and the balance being iron, wherein the inoculant additionally contains 0.1 to 10% by weight of particulate bismuth oxide particles and optionally 0.1 and 10% by weight of one or more particulate metal sulphides and/or one or more particulate iron oxides, where the particulate bismuth oxide is mixed or blended with the ferrosilicon particles, or is simultaneously added to cast iron together with the particulate ferrosilicon particles.

Method for Desulfurizing

The method employs a desulfurization agent that is introduced into a smelt of one of molten pig iron and molten steel. The desulfurization agent contains calcium oxide, bitumen and at least one flux agent, with the agent containing 1 to 10% by weight bitumen. 1. A method for slag treatment comprising the step ofadding a desulphurization agent to a melt of at least one of a molten pig iron and a molten steel, said agent containing calcium oxide, bitumen as well as between 0.01 and 10% by weight of at least one flux agent, wherein the at least one flux agent is selected from the group of members consisting of multivalent alcohols, bituminous coal, silicone oils and mixtures thereof, and wherein the agent does not contain any calcium carbide, any magnesium or any magnesium alloy.2. A method in accordance with claim 1 , wherein the agent is introduced into the molten pig iron or into the molten steel by an immersion lance process using a transport gas or by a stirring-in process.3. A method in accordance with claim 1 , wherein the agent is provided in the form of one or more briquettes and is added into the molten pig iron or into the molten steel for pre-sulfurizing and/or for the slag treatment of molten pig iron or of molten steel.4. A method for treating pig iron comprising the steps ofobtaining a smelt of one of molten pig iron and molten steel;introducing a desulfurization agent into said smelt composed of calcium oxide or a mixture which contains at least 20% by weight of calcium oxide and one or more compounds selected from the group consisting of calcium hydroxide, calcium carbonate, and any desired mixtures of the aforesaid compounds;1 to 10% by weight bitumen;0.01 to 10% by weight of a flux agent to increase the flow behavior of said calcium oxide, said flux agent being selected from the group consisting of multivalent alcohols, bituminous coals, silicone oils glycols, organopolysiloxanes, any desired mixtures thereof, and polymethylhydrogensiloxane; andup to ...

CONVERTER STEELMAKING METHOD

A method of producing molten steel supplies gaseous oxygen from a top blowing lance into a converter to perform decarburization refining of molten iron while adding a CaO-containing powdery dephosphorizing agent to simultaneously decarburize and dephosphorize the molten iron and includes supplying the dephosphorizing agent to a bath surface of the molten iron together with at least one gas jet from the top blowing lance and a dynamic pressure determined when a gas jet blown from respective lance nozzles of the top blowing lance impinges onto the bath surface of the molten iron is controlled to not more than 0.50 kgf/cm. 16-. (canceled)7. A converter steelmaking method of producing molten steel by supplying gaseous oxygen from a top blowing lance into a converter to perform decarburization refining of molten iron while adding a CaO-containing powdery dephosphorizing agent to simultaneously decarburize and dephosphorize the molten iron , comprising supplying the dephosphorizing agent to a bath surface of the molten iron together with at least one gas jet from the top blowing lance and a dynamic pressure determined from formulae (1)-(4) when a gas jet blown from respective lance nozzles of the top blowing lance impinges onto the bath surface of the molten iron is controlled to not more than 0.50 kgf/cm:{'br': None, 'i': P=', '×ρg', 'U', '×de×P', '/Lh, 'sup': −11', '2, 'sub': 0', '0, '3.13×10×()\u2003\u2003(1)'}{'br': None, 'i': U', '/P, 'sub': 0', '0, 'sup': 2/7', '1/2, '=740(1−(1.033))\u2003\u2003(2)'}{'br': None, 'i': P', '=Fj', '×dt, 'sub': '0', 'sup': '2', '/(0.456)\u2003\u2003(3)'}{'br': None, 'i': g=ρj+Vp', 'Fj/, 'ρ/(60)\u2003\u2003(4)'}wherein{'sup': '2', 'P: dynamic pressure at a center of the jet exerted on the bath surface of the molten iron by the gas jet blown from the lance nozzle [kgf/cm]'}{'sup': '3', 'ρg: density of the gas jet [kg/Nm]'}{'sub': '0', 'U: velocity of the gas jet blown from the lance nozzle [m/sec]'}de: outlet diameter of the lance nozzle ...

Method for ironmaking by smelting reduction in stir-generated vortex

A method for ironmaking by smelting reduction in a stir-generated vortex includes: (1) placing a pig iron in an induction furnace, and then heating the pig iron to a molten state to form a molten iron, and maintaining the molten iron to be greater than or equal to 1450° C.; (2) stirring a center of the molten iron to form a vortex with a height-to-diameter ratio of 0.5-2.5, and continuously performing stirring; (3) mixing and grinding on an iron-containing mineral, a reducing agent and a slag-forming agent in a mass ratio of 1:(0.1-0.15):(0.25-0.4) to obtain a powder mixture, spraying and blowing the powder mixture to a center of the vortex, performing a reduction reaction, and stopping the stirring after the molten iron and molten slags are obtained, wherein a waste gas is produced; and (4) discharging the molten iron and the molten slags respectively, and exhausting a treated waste gas.

Method of dechromizing molten iron and method of manufacturing phosphate fertilizer raw material

On molten iron having the P concentration of 2 to 4 mass % and having the Cr concentration of 0.3 to 1.2 mass %, a dechromization treatment is performed by adjusting a basicity (CaO mass %)/(SiO2 mass %) of slag to greater than 0.1 and 1 or less and supplying an oxygen source with a molten iron temperature falling within a range of 1250 to 1500° C. to manufacture molten iron having the P concentration of 1.9 to 3.8 mass % and having the Cr concentration of less than 0.2 mass %.

CONTROL MATERIAL, AND METHOD FOR PRODUCING SAME

The invention has for its object to provide a control material that is used with a wire injection process for graphite spheroidization in ductile cast iron production for the purpose of gaining control of the reaction of magnesium and achieving weight reductions. In the wire injection process for graphite spheroidization, the control material characterized by comprising a porous, volcanic silicate mineral containing 70 to 75% by weight of SiOis filled together with a magnesium alloy in the wire. 1. A control material that is filled together with a magnesium alloy in a wire in a wire injection process for graphite spheroidization , characterized by being a porous , volcanic silicate mineral containing 70 to 75% by weight of SiO.2. The control material according to claim 1 , characterized by having a porosity of 60 to 80%.3. The control material according to claim 1 , characterized by having an Ig. loss of 0.5% or less.4. The control material according to claim 2 , characterized by having an Ig. loss of 0.5% or less.5. The control material according to claim 1 , characterized by having a specific gravity of 0.5 to 1.0 g/cm.6. The control material according to claim 2 , characterized by having a specific gravity of 0.5 to 1.0 g/cm.7. The control material according to claim 3 , characterized by having a specific gravity of 0.5 to 1.0 g/cm.8. The control material according to claim 4 , characterized by having a specific gravity of 0.5 to 1.0 g/cm.9. The control material according to claim 1 , characterized by being a fired spherical member having a diameter of less than 5 mm or a fired rod member having a length of less than 5 mm.10. The control material according to claim 2 , characterized by being a fired spherical member having a diameter of less than 5 mm or a fired rod member having a length of less than 5 mm.11. The control material according to claim 3 , characterized by being a fired spherical member having a diameter of less than 5 mm or a fired rod member ...

PROCESS FOR PRODUCING SPHEROIDAL-GRAPHITE CAST IRON, AND SPHEROIDAL-GRAPHITE CAST IRON MEMBER OBTAINED FROM SAID SPHEROIDAL-GRAPHITE CAST IRON

A process for producing spheroidal graphite cast iron includes a spheroidization treatment, an inoculant treatment and a pouring inoculation treatment. A molten iron is subjected to the spheroidization treatment using a spheroidizing agent of an Fe—Si—Mg—Ca-based alloy which contains a given amount of Ba and contains substantially no rare-earth element. 1. A process for producing spheroidal graphite cast iron which contains substantially no rare-earth element , the process comprising:(a) a step of adding a spheroidizing agent of an Fe—Si—Mg—Ca-based alloy that contains, in terms of % by mass, 3.0 to 6.0% of Mg, 1.0 to 2.0% of Ca, 0.5 to 3.5% of Ba, and 0.3% or less of Al and that contains substantially no rare-earth element to a molten iron in an amount of 0.8 to 2.0%, in terms of % by mass based on the molten iron, to conduct a spheroidization treatment of the molten iron in a ladle;(b) a step of conducting an inoculation treatment using a first Fe—Si—Ca-based inoculant or Ca—Si-based inoculant, either simultaneously with the step (a) or after the step (a); and(c) a step of adding a second Fe—Si—Ca-based inoculant containing, in terms of % by mass, 45 to 75% of Si and 1.0 to 3.0% of Ca to the molten iron after the step (b) and before the molten iron is cast into a casting mold, in an amount of 0.2 to 0.4% in terms of % by mass based on the molten iron which has not undergone the spheroidization treatment, to conduct a pouring inoculation treatment,wherein the spheroidal graphite cast iron to be obtained has a composition which contains, in terms of % by mass, 3.0 to 4.5% of C, 3.0 to 4.0% of Si, 0.2 to 0.4% of Mn, 0.006 to 0.020% of S, 0.08 to 0.30% of Cu, 0.020 to 0.040% of Sn, 0.015 to 0.050% of Mg, 0.03% or less of Al, and 0.01% or less of Zn, with the remainder being Fe and unavoidable impurities.2. A spheroidal graphite cast iron member comprising spheroidal graphite cast iron obtained by the production process according to claim 1 ,{'sup': '−3', "the ...

IMPELLER AND METHOD OF MELT-POOL PROCESSING METHOD USING THE SAME

An impellor for stirring a melt pool includes: an impellor body extending in the length direction; a blowing nozzle which is provided in such a way as to pass through one part at the bottom end of the impellor body; and a blade provided on the upper part of the impellor body. As a result, when the impellor is used, a stirring flow produced due to the blade and a stirring flow due to substances blown into the melt-pool via the blowing nozzle correspond to each other, and the two flows are combined such that the overall stirring force is improved. Consequently, it is possible to improve the efficiency of stirring by the impeller as compared with hitherto, and, as a result, refining efficiency in the refining step is improved as the rate of reaction between the melt-pool and additives is increased. 1. An impeller for stirring melt-pool , comprising:an impeller body extending in a longitudinal direction;a blowing nozzle configured to pass through a portion of a lower portion of the impeller body; anda blade installed at an upper portion of the impeller body.2. The impeller of claim 1 , wherein the impeller body is submerged in a container containing the melt-pool claim 1 , andthe impeller body is submerged at least from a bath surface of the melt-pool to a lower region of the melt-pool.3. The impeller of claim 2 , further comprising a supply tube which is configured to longitudinally pass through an inside of the impeller body and has a lower end communicating with the blowing nozzle.4. The impeller of claim 2 ,wherein when it is assumed that the melt-pool contained in the container has a height of H,the blade is positioned at a region above a (½)H position from a bottom surface of the container, andthe blowing nozzle is positioned at a region under the (½)H position from the bottom surface of the container.5. The impeller of claim 4 ,wherein the blade is installed adjacent to the bath surface of the melt-pool and the blowing nozzle is provided adjacent to the bottom ...

Vermicular Cast Iron Alloy and Internal Combustion Engine Head

The present invention relates to the technological field of cast iron alloys for automotive and similar applications. Problem to be solved: Presently, structural parts of internal combustion engines are made of gray cast iron alloys that rarely have a tensile strength limit range greater than 350 MPa or vermicular cast iron alloys that do not remain stable at high temperatures. Solution of the problem: It is disclosed a vermicular cast iron alloy that, due to the addition of amounts of Molybdenum, Copper and Tin, with Hot Resistance Factor from 0.5 to 1.7% (HRF=3×(% Mo)+1×(% Sn)+0.25×(% Cu)) achieves a tensile strength limit of 500 to 550 MPa at room temperature and up to 300° C., and a tensile strength limit of 430 to 450 MPa at 400° C.

INOCULANT ALLOY FOR THICK CAST-IRON PARTS

The present invention relates to an inoculant alloy for treating thick ferrosilicon-based cast-iron parts, containing between 0.005 and 3% by weight of Rare Earths, characterized in that it also contains between 0.2 and 2% by weight of Antimony. 1. An inoculant alloy for treating thick ferrosilicon-based cast-iron parts , containing between 0.005 and 3% by weight of Rare Earths , characterized in that it also contains between 0.2 and 2% by weight of Antimony.2. The inoculant alloy according to claim 1 , characterized in that it also comprises magnesium and constitutes a nodularizer alloy.3. The inoculant alloy according to claim 1 , characterized in that it does not contain magnesium.4. The inoculant alloy according to claim 1 , characterized in that the ratio of rare earths to antimony is comprised between 0.9 and 2.2.5. The inoculant alloy according to claim 1 , characterized in that the proportion by weight of antimony is higher than 0.3%.6. The inoculant alloy according to claim 1 , characterized in that the proportion by weight of antimony is lower than 1.5%.7. The inoculant alloy according to claim 1 , characterized in that the rare earths comprise Lanthanum.8. The inoculant alloy according to claim 1 , characterized in that the proportion by weight of rare earths is higher than 0.2%.9. The inoculant alloy according to claim 1 , characterized in that the proportion by weight of rare earths is lower than 1.2%.10. A use of an inoculant according to claim 1 , characterized in that said inoculant is introduced in the form of a powder.11. The use of an inoculant according to claim 1 , characterized in that said inoculant is introduced in the form of a solid insert placed in a casting mold.12. The use of an inoculant according to for manufacturing cast-iron parts having portions with thicknesses larger than 6 mm.13. The inoculant alloy according to claim 5 , characterized in that the proportion by weight of antimony is higher than 0.5%.14. The inoculant alloy ...

Method and apparatus for the production of cast iron, cast iron produced according to said method

A method for the production of cast iron starting from pre-reduced iron ore (DRI) with an electric arc furnace includes the steps of preparing a charge of pre-reduced iron ore DRI having a metallization higher than 90% and containing over 2.8% by weight of carbon, wherein at least 80% of the carbon is combined with the iron to form iron carbide FeC; charging the charge of pre-reduced iron ore into the electric arc furnace; and melting the DRI charge to form liquid cast iron having at least 80% by weight of actual carbon content deriving from the carbon in the charge of pre-reduced iron ore, the melting step being in a reducing atmosphere and in a melting chamber of the electric arc furnace subjected to a positive internal pressure generated by the gases produced by reduction reactions that develop during melting. 1. A method for production of cast iron starting from pre-reduced iron ore (DRI) with an electric arc furnace (EAF) , comprising the following steps:{'sub': '3', 'a. preparing a charge of the pre-reduced iron ore (DRI) having a metallization higher than 90% and containing over 2.8% by weight of carbon, wherein at least 80% of said carbon is combined with iron to form iron carbide (FeC);'}b. charging the charge of the pre-reduced iron ore (DRI) into the electric arc furnace (EAF); andc. melting the DRI charge to form liquid cast iron,wherein said liquid cast iron has a predetermined actual content of carbon, at least 80% by weight of said actual carbon content of the liquid cast iron deriving from the carbon in the charge of the pre-reduced iron ore (DRI), andwherein step c. is carried out in a reducing atmosphere and in a melting chamber of the electric arc furnace (EAF) subjected to a positive internal pressure generated by gases produced by reduction reactions that develop in step c.2. The method according to claim 1 , wherein said charge of pre-reduced iron ore (DRI) contains up to 6.5% by weight of carbon.3. The method according to claim 1 , wherein ...

Nodular cast alloy

A nodular cast alloy, a casting made therefrom, and a production process therefor, which has a perlitic-ferritic microstructure for cast iron products and has a high strength combined with good ductility and toughness even in the cast state, including, as nonferrous constituents, C, Si, Ni, Mn, Cu, Mg, Cr, Al, P, S and normal impurities, characterized in that the nodular cast alloy in the cast state without subsequent heat treatment achieves a high static strength of a 0.2% offset yield strength of ≥600 MPa and a tensile strength of ≥750 MPa combined with good ductility of an elongation at break A5 of from 2 to 10%.

Combined system for producing steel and method for operating the combined system

The invention relates to a plant complex for steel production comprising a blast furnace for producing pig iron, a converter steel mill for producing crude steel and a gas-conducting system for gases that occur in the production of pig iron and/or in the production of crude steel. According to the invention, the plant complex additionally has a chemical or biotechnological plant connected to the gas-conducting system and a plant for producing hydrogen. The plant for producing hydrogen is connected to the gas-conducting system by a hydrogen-carrying line. Also the subject of the invention is a method for operating the plant complex.

Gray cast iron inoculant

A ferrosilicon inoculant for gray cast iron containing between 0.1 to 10% by weight strontium, less than 0.35% by weight calcium, 1.5 to 10% by weight aluminum and 0.1 to 15% zirconium, The inoculant, method for producing the inoculant, method for inoculating the melt and a gray cast iron inoculated with the inoculant are covered.

SPHERICAL GRAPHITE CAST IRON SEMI-SOLID CASTING METHOD AND SEMI-SOLID CAST PRODUCT

The present invention provides a casting method and cast product of spherical graphite cast iron, in which, even with a small modulus, there is no chill, the spherical graphite in the tissue is further made ultrafine, the dispersion of the particle diameter is small, and the number of the particles is several times that of the conventional one in the as cast state where heat treatment is not carried out. 1. A semi-solid casting method of a spherical graphite cast iron comprised from;a melting process, in which raw material composed of cast iron is melted and original molten metal is obtained;a spheroidizing treatment process, in which the original molten metal is spheroidized;an inoculation process, in which an inoculant is added to the spheroidized original molten metal; anda casting process, in which the original molten metal after the inoculation process is poured and filled up to a product space through a gate of a metal mold;wherein the original molten metal before being filled up to the product space is controlled to a semi-solidification temperature range;the pouring temperature is controlled to (melting point+40° C.) or less; and a temperature of the raw material when passing through the gate is set to 1140-1170° C.2. The semi-solid casting method of the spherical graphite cast iron according to claim 1 , wherein an amount of nitrogen at the time of melting of the cast iron is controlled to 0.9 ppm (mass) or less.3. The semi-solid casting method of the spherical graphite cast iron according to claim 1 , wherein the semi-solidification temperature range is set before the gate by controlling the amount of heat released from the molten metal.4. The semi-solid casting method of the spherical graphite cast iron according to claim 1 , wherein a temperature of the raw material when passing through the gate is controlled to a constant temperature in the semi-solidification temperature range.5. (canceled)6. (canceled)7. The semi-solid casting method of the spherical ...

METHOD FOR CASTING IRON OR STEEL, A CHARGE FOR USE IN THE METHOD, AND A METHOD FOR PRODUCING A CHARGE

Casting of iron or steel is performed by assembling a charge () of plate-like charge elements (. . . ) with known compositions and dimensions by placing them on top of each other, and of an alloying component entity () with known composition, such as alloying component pieces or an alloying component cartridge, by means of which the composition of the charge is balanced to the desired precise composition. The charge is melted in a furnace () and cast to form a casting with an exactly known composition. 1. A method for casting iron or steel , wherein a charge containing raw materials for a casting is melted and cast into an object of desired shape , wherein the charge is assembled of plate-like charge elements with known compositions and dimensions by placing them on top of each other , and of an alloying component entity with a known composition , by means of which the composition of the charge is balanced to the desired precise composition.2. The method according to claim 1 , wherein the charge elements are made of iron or steel claim 1 , and the alloying component entity contains claim 1 , for the most part claim 1 , metal other than iron claim 1 , and/or non-metal.3. The method according to claim 2 , wherein the alloying component entity contains at least one of the following: molybdenum claim 2 , chromium claim 2 , nickel claim 2 , silicon claim 2 , carbon.4. The method according to claim 1 , wherein the plate-like charge elements are disc-like elements provided with a central hole.5. The method according to claim 4 , wherein the disc-like elements are stacked on top of each other around a vertical guiding element so that the vertical guiding element extends through the holes.6. The method according to claim 5 , wherein the lower end of the vertical guiding element is fixed to a bottom element supporting the charge elements claim 5 , and it constitutes a lifting arm claim 5 , by means of which the charge elements are placed in a furnace claim 5 , in which the ...

Method for recycling used or discarded portable electric batteries

A method for upgrading used or rejected electric battery cells, which include upgradable compounds, such as iron, zinc, manganese, copper, and fixed and volatile carbon, and heavy metals and dangerous compounds. The used or rejected battery cells are introduced as a load into a furnace for melting metal, such as a cupola furnace, a free arc furnace, or an induction furnace. A device for purifying gases produced by the furnace and for capturing and removing noxious elements, such as mercury, chlorides, and fluorides, and heavy molecules such as dioxins, furans, and aromatic substances, is provided in a discharge route of the hot gases, downstream from the melting furnace.

GRAY CAST IRON INOCULANT

A ferrosilicon inoculant for gray cast iron containing between 0.1 to 10% by weight strontium, less than 0.35% by weight calcium, 1.5 to 10% by weight aluminum and 0.1 to 15% zirconium, The inoculant, method for producing the inoculant, method for inoculating the melt and a gray cast iron inoculated with the inoculant are covered. 1. A method for inoculating gray cast iron comprising adding a ferrosilicon inoculant to molten cast iron , wherein the ferrosilicon inoculant consist of essentially of about 15 to 90% by weight silicon; about 0.1 to 10% by weight strontium; less than about 0.35% by weight calcium; about 1.5 to 10.0% by weight aluminum; about 0.1 to 15% by weight zirconium , and a balance of iron , with residual impurities in the ordinary amount.2. The method of claim 1 , wherein no other inoculant is added to the molten gray cast iron in the transfer ladle.3. The method of claim 1 , wherein no other inoculant is added to the molten gray cast iron in the pouring unit.4. The method of claim 1 , wherein no other inoculant is added to the molten gray cast iron in the pouring stream to the mold.5. The method of claim 1 , wherein a single addition of the ferrosilicon inoculant is made to the molten cast iron in the pouring unit during the casting process.6. The method of claim 1 , wherein the silicon in the ferrosilicon inoculant is present in an amount of about 40 to 80% by weight.7. The method of claim 1 , wherein the aluminum in the ferrosilicon inoculant is present in about 2-6% by weight.8. The method of claim 1 , wherein the aluminum in the ferrosilicon inoculant is present in about 2-4% by weight. This Application is a Divisional of U.S. application Ser. No. 15/099,897, filed on Apr. 15, 2016, the contents of which is incorporated by reference.The invention relates to the manufacture of cast iron and more particularly to an inoculant for gray cast iron to improve the overall properties thereof.Cast iron is typically produced in a cupola or induction ...

Hypereutectic white iron alloys comprising chromium and nitrogen and articles made therefrom

Disclosed are a hypereutectic white iron alloy and articles such as pump components made therefrom. Besides iron and unavoidable impurities the alloy comprises, in weight percent based on the total weight of the alloy, from 2.5 to 6.5 C, from 0.04 to 1.2 N and from 18 to 58 Cr and, optionally, one or more of Mn, Ni, Co, Cu, Mo, W, V, Mg, Ca, Si, rare earth elements, Nb, Ta, Ti, Zr, Hf, Al, B.

KR DESULFURIZATION STIRRING PADDLE CASTING MATERIAL AND PREPARATION METHOD THEREFOR

Provided are a Kanbara Reactor (KR) desulfurization stirring paddle casting material and a preparation method therefor. The casting material consists of a base material and an additive; the base material consists of the following raw materials in weight percentages: M70 sintered mullite 60-80%, flint clay 5-20%, fine powder 5-20%, and pure calcium aluminate cement 1-5%. The percentages of each component of the additive based on the weight of the base material are as follows: water reducing agent 0.05-0.2%, and heat-resistant stainless steel fiber 1-5%. The main raw materials are M70 sintered mullite and a small amount of flint clay so as to ensure good thermal shock resistance; the medium temperature and high temperature strength are controlled at 100-180 MPa so as to ensure good erosion resistance; the content of AlOin the casting material is 60-70% so as to ensure good corrosion resistance; the ratio of high temperature strength to medium temperature strength is controlled at 1-1.2, which further improves the thermal shock resistance and peeling resistance of the casting material, thereby extending the service life of the stirring paddle. The casting material is lower in cost and has a good practical furnace usage effect; in addition, a paddle blade has less chance of cracking and peeling, while a bottom portion of the stirring paddle is less eroded, thus the frequency of paddle blade repair is low, and service life is significantly improved. 1. A casting material for a stirring paddle for KR desulfurization , consisting of a base material of the casting material and additives ,wherein the base material of the casting material consists of the following ingredients by weight percentage: 60-80% of M70 sintered mullite, 5-20% of flint clay, 5-20% of micropowder, and 1-5% of pure calcium aluminate cement; andwherein the additives comprise the following ingredients by weight percentage based on the weight of the base material of the casting material: 0.05-0.2% of a ...

METHOD FOR PRODUCING ROCK WOOL AND RECOVERABLE CAST IRON

The invention relates to a method for producing rock wool and cast iron by melting a mixture of materials such as basalt, blast-furnace slag, coke and components necessary for melting, with an admixture containing alumina, said admixture making it possible to adjust the alumina content in order to obtain a rock wool having the following composition (as wt %): Al2O3: 18-22; SiO2: 40-50; CaO: 10-15; MgO: <10; FeO: <2; Na2O: <4; K2O: <2. The method includes the following operations: producing by melting a slag and a cast iron, separating the slag and the cast iron, and performing a fibring operation on the slag followed by a bonding operation in order to obtain the rock wool. According to the invention, at least one spent adsorbent and/or catalyst is used as an admixture, said catalyst containing alumina in Al2O3 form. Said adsorbent and/or catalyst preferably contains at least one metal, and said metal is retrieved in the cast iron. 1. A method for producing rock wool and cast iron by melting a mixture of materials such as basalt , blast-furnace slag , coke and components necessary for melting , with an admixture containing alumina , said admixture making it possible to adjust the alumina content to obtain rock wool having the following composition (in wt %): Al2O3: 18-22; SiO2: 40-50; CaO: 10-15; MgO: <10; FeO<2; Na2O<4; K2O<2 , the method comprising the operations of producing slag and cast iron by melting , separating the slag and the cast iron and subjecting the slag to a fiber forming operation and then bonding to obtain rock wool , characterized in that at least one spent catalyst and/or at least one spent adsorbent is used as admixture , said catalyst and/or adsorbent containing alumina in the form of Al2O3.2. The method as claimed in claim 1 , characterized in that said catalyst and/or adsorbent contains at least one metal claim 1 , and in that said metal is recovered in the cast iron.3. The method of claim 1 , characterized in that the admixture comprises one ...

Methods for manganese removal of cast iron

The present invention does not require a demanganese agent such as a sulfide or a combustible gas in the removal of manganese of cast iron. The method for removing manganese of cast iron according to the present invention is implemented by performing the removal of a manganese component by allowing a furnace to be in an oxygen atmosphere, and by blowing air into a molten cast iron in the furnace, while a carbon component in the molten cast iron is being maintained at an approximately constant amount. Alternatively, the method for removing manganese of cast iron according to the present invention is implemented by performing the removal of the manganese component by allowing the furnace to be in an oxygen atmosphere and by stirring the molten cast iron in the furnace, while the carbon component in the molten cast iron is being maintained at an approximately constant amount.

Process for Dephosphorization of Molten Metal During a Refining Process

Process for dephosphorization of molten metal during a refining process using a lime composition in the form of compacted particles having a Shatter Test Index of less than 20%, leading to a refined metal reduced in phosphorus components to the extent that the refined metal reduced in phosphorus is showing a phosphorus content lower than 0.02 w % based on the total weight of the refined metal reduced in phosphorus. 1. Process for dephosphorization of molten metal during a refining process comprising the steps ofcharging a vessel with hot metal and optionally scrapcharging said vessel with a first lime composition.blowing oxygen into said vesselforming slag with said first lime composition charged into said vesseldephosphorization of hot metal to form a refined metal reduced in phosphorus components, and {'br': None, 'sub': 3', '3, 'aCaCO·bMgCO·xCaO·yMgO·uI,'}, 'discharging said refined metal reduced in phosphorus components characterized in that said first lime composition comprises at least OM first calcium-magnesium compound fitting the formula'}wherein I represents impurities, a, b and u each being mass fractions ≧0 and ≦50%, x and y each being mass fractions ≧0 and ≦100%, with x+y≧50% by weight, based on the total weight of said at least one calcium-magnesium compound, said at least one calcium-magnesium compound being in the form of particles, said first lime composition having a cumulative calcium and magnesium content in the form of oxides greater than or equal to 20% by weight based on the total weight of the first lime composition, and being in the form of compacts, each compact being formed with compacted and shaped particles of calcium-magnesium compounds, said compacts having a Shatter Test Index of less than 20%, and in that said dephosphorization step of hot metal leads to a refined metal reduced in phosphorus component to the extent that the refined metal reduced in phosphorus is showing a phosphorus content lower than 0.02 w % based on the total ...

CAST IRON INOCULANT AND METHOD FOR PRODUCTION OF CAST IRON INOCULANT

An inoculant for the manufacture of cast iron with spheroidal graphite is disclosed, the inoculant has a particulate ferrosilicon alloy having 2. The inoculant according to claim 1 , wherein the ferrosilicon alloy comprises between 45 and 60% by weight of Si.3. The inoculant according to claim 1 , wherein the ferrosilicon alloy comprises between 60 and 80% by weight of Si.4. The inoculant according to claim 1 , wherein the rare earth metals include Ce claim 1 , La claim 1 , Y and/or mischmetal.5. The inoculant according to claim 1 , wherein the inoculant comprises 0.5 to 8% by weight of particulate SbO.6. The inoculant according to claim 1 , wherein the inoculant comprises from 0.1 to 10% of particulate BiO claim 1 ,7. The inoculant according to claim 1 , wherein the inoculant comprises from 0.5 to 3% of one or more of particulate FeO claim 1 , FeO claim 1 , FeO claim 1 , or a mixture thereof claim 1 , and/or from 0.5 to 3% of one or more of particulate FeS claim 1 , FeS claim 1 , FeS claim 1 , or a mixture thereof.8. The inoculant according to claim 1 , wherein the total amount of the particulate SbOand the at least one of BiO claim 1 , and/or one or more of particulate FeO claim 1 , FeO claim 1 , FeO claim 1 , or a mixture thereof claim 1 , and/or one or more of particulate FeS claim 1 , FeS claim 1 , FeS claim 1 , or a mixture thereof is up to 20% by weight claim 1 , based on the total weight of the inoculant.9. The inoculant according to claim 1 , wherein the inoculant is in the form of a blend or a physical mixture of the particulate ferrosilicon alloy and the particulate SbOand the at least one of particulate BiO claim 1 , and/or one or more of particulate FeO claim 1 , FeO claim 1 , FeO claim 1 , or a mixture thereof claim 1 , and/or one or more of particulate FeS claim 1 , FeS claim 1 , FeS claim 1 , or a mixture thereof.10. The inoculant according to claim 1 , wherein the particulate SbOand the at least one of particulate BiO claim 1 , and/or one or more of ...

HIGH-STRENGTH FLAKE GRAPHITE CAST IRON, MANUFACTURING METHOD THEREOF, AND ENGINE BODY FOR INTERNAL COMBUSTION ENGINE INCLUDING CAST IRON

The present disclosure relates to a manufacturing method of high-strength flake graphite cast iron, the high-strength flake graphite cast iron manufactured by the method, and an engine body including the cast iron, and more particularly, to flake graphite cast iron and a manufacturing method thereof, wherein the flake graphite cast iron has a uniform graphite shape and low probability of forming chill and has high tensile strength of at least 350 MPa and excellent workability and fluidity by controlling the content of manganese (Mn) and a trace of strontium (Sr), which are included in the cast iron, within a specific ratio. 1. A flake graphite cast iron comprising 3.0 to 3.2% of carbon (C) , 2.0 to 2.3% of silicon (Si) , 1.3 to 1.6% of manganese (Mn) , 0.1 to 0.13% of sulfur (S) , 0.06% or less of phosphorus (P) , 0.6 to 0.8% of copper (Cu) , 0.25 to 0.35% of molybdenum (Mo) , 0.003 to 0.006% of strontium (Sr) , and the balance iron (Fe) satisfying 100% as a total weight % , and having a chemical composition , in which a ratio (Mn/Sr) of the content of manganese (Mn) to the content of strontium (Sr) is in a range of 216 to 515.2. The flake graphite cast iron of claim 1 , wherein the flake graphite cast iron has a chemical composition claim 1 , in which the ratio (Mn/Sr) of the content of manganese (Mn) to the content of strontium (Sr) is in a range of 299 to 451.3. The flake graphite cast iron of claim 1 , wherein the flake graphite cast iron has a tensile strength of 355 to 375 MPa.4. The flake graphite cast iron of claim 1 , wherein the flake graphite cast iron has a Brinell hardness (BHW) of 245 to 279.5. The flake graphite cast iron of claim 1 , wherein a wedge test specimen has a chill depth of 3 mm or less.6. The flake graphite cast iron of claim 1 , wherein a fluidity test specimen has a spiral length of 730 mm or more.7. The flake graphite cast iron of claim 1 , wherein the flake graphite cast iron has a carbon equivalent (CE) in a range of 3.70 to 4.0.8. An ...

METHOD FOR PRODUCING DIE-CAST PRODUCT OF SPHEROIDAL GRAPHITE CAST IRON HAVING ULTRAFINE SPHEROIDAL GRAPHITE, AND DIE-CAST PRODUCT OF SPHEROIDAL GRAPHITE CAST IRON

For the purpose of providing a method of die cast product of spheroidal graphite cast iron and a die cast product of spheroidal graphite cast iron having the number of spherical graphites of 3000/mmor more in an as cast state, there is disclosed a method of die cast product of ultrafine spheroidal graphite cast iron, including the steps of: a melting step of heating and melting raw materials made of cast iron to obtain source melting metal; a spheroidizing treatment step in which a spheroidizing treatment is performed; an inoculation step of inoculating; and a casting step of casting in a die mold. The amount of nitrogen is adjusted so that the amount of nitrogen generated in the time of melting becomes 0.9 ppm (mass) or less. 1. method of die cast product of ultrafine spheroidal graphite cast iron having steps;a melting step of heating and melting raw materials made of cast iron to obtain source melting metal,a spheroidizing treatment step in which a spheroidizing treatment is performed,an inoculation step of inoculating,a casting step of casting in a die mold,wherein the amount of nitrogen is adjusted so that the amount of nitrogen generated in the time of melting becomes 0.9 ppm (mass) or less.2. A method of die cast product of ultrafine spheroidal graphite cast iron according to claim 1 ,whereinobtaining source melting metal by heating and melting raw materials made of cast iron,heating the source melting metal to a predetermined temperature of 1500° C. or higher,stopping heating,and holding at that temperature for a certain period of time to remove oxygen from the source melting metal, then slowly cooling the source melting metal to reduce the nitrogen in the source melting metal,then spheroidizing, inoculating and casting.3. A method of die cast product of ultrafine spheroidal graphite cast iron according to claim 1 , wherein said spheroidizing treatment is carried out at an oxygen content of 20 ppm (mass) or less.4. A method of die cast product of ultrafine ...

Method for dephosphorization of molten iron, and refining agent

When performing dephosphorization treatment of hot metal by adding a refining agent as a lime source and an oxygen source (dephosphorizing agent(s) and a gaseous oxygen source into the hot metal accommodated in a hot metal holding container, the refining agent used is a refining agent having an Ig-loss value of from 4.0% by mass to 35.0% by mass and including 60% by mass or more of quicklime.

CAST IRON INOCULANT AND METHOD FOR PRODUCTION OF CAST IRON INOCULANT

An inoculant for the manufacture of cast iron with spheroidal graphite is disclosed, the inoculant has a particulate ferrosilicon alloy having 2. The inoculant according to claim 1 , wherein the ferrosilicon alloy comprises between 45 and 60% by weight of Si.3. The inoculant according to claim 1 , wherein the ferrosilicon alloy comprises between 60 and 80% by weight of Si.4. The inoculant according to claim 1 , wherein the rare earth metals include Ce claim 1 , La claim 1 , Y and/or mischmetal.5. The inoculant according to claim 1 , wherein the inoculant comprises 0.2 to 12% by weight of particulate rare earth metal oxide(s).6. The inoculant according to claim 1 , wherein the rare earth metal oxide(s) is (are) CeOand/or LaOand/or YO.7. The inoculant according to claim 1 , wherein the inoculant comprises from 0.3 to 10% of particulate BiO.8. The inoculant according to claim 1 , wherein the inoculant comprises from 0.3 to 10% of particulate BiS.9. The inoculant according to claim 1 , wherein the inoculant comprises from 0.3 to 10% of particulate SbO.10. The inoculant according to claim 1 , wherein the inoculant comprises from 0.3 to 10% of particulate SbS.11. The inoculant according to claim 1 , wherein the inoculant comprises from 0.5 to 3% of one of more of particulate FeO claim 1 , FeO claim 1 , FeO claim 1 , or a mixture thereof claim 1 , and/or from 0.5 to 3% of one of more of particulate FeS claim 1 , FeS claim 1 , FeS claim 1 , or a mixture thereof.12. The inoculant according to claim 1 , wherein the total amount of the particulate rare earth metal oxide(s) and the at least one of particulate BiO claim 1 , and/or particulate BiS claim 1 , particulate SbO claim 1 , and/or particulate SbS claim 1 , and/or one of more of particulate FeO claim 1 , FeO claim 1 , FeO claim 1 , or a mixture thereof claim 1 , and/or one of more of particulate FeS claim 1 , FeS claim 1 , FeS claim 1 , or a mixture thereof is up to 20% by weight claim 1 , based on the total weight of the ...

CAST IRON INOCULANT AND METHOD FOR PRODUCTION OF CAST IRON INOCULANT

An inoculant for the manufacture of cast iron with spheroidal graphite is disclosed, the inoculant has a particulate ferrosilicon alloy having 1. An inoculant for the manufacture of cast iron with spheroidal graphite , wherein said inoculant comprises 0.02-10% by weight Ca;', '0-15% by weight rare earth metal;', '0-5% by weight Al;', '0-5% by weight Sr;', '0-5% by weight Mg;', '0-12% by weight Ba;', '0-10% by weight Zr;', '0-10% by weight Ti;', '0-10% by weight Mn;, 'a particulate ferrosilicon alloy consisting of between about 40 to 80% by weight Si;'}wherein at least one, or the sum, of elements Ba, Sr, Zr, Mn, or Ti is (are) present in an amount of at least 0.05% by weight, the balance being Fe and incidental impurities in the ordinary amount,{'sub': 2', '3, 'wherein said inoculant additionally contains, by weight, based on the total weight of inoculant: 0.1 to 15% by weight of particulate SbO.'}2. The inoculant according to claim 1 , wherein the ferrosilicon alloy comprises between 45 and 60% by weight of Si.3. The inoculant according to claim 1 , wherein the ferrosilicon alloy comprises between 60 and 80% by weight of Si.4. The inoculant according to claim 1 , wherein the rare earth metals include Ce claim 1 , La claim 1 , Y and/or mischmetal.5. The inoculant according to claim 1 , wherein the inoculant comprises 0.5 to 10% by weight of particulate SbO.6. The inoculant according to claim 1 , wherein the inoculant is in the form of a blend or a physical mixture of the particulate ferrosilicon alloy and the particulate SbO.7. The inoculant according to claim 1 , wherein the particulate SbOis present as a coating compound on the particulate ferrosilicon alloy.8. The inoculant according to claim 1 , wherein the inoculant is in the form of agglomerates or briquettes made from a mixture of the particulate ferrosilicon alloy and the particulate SbO.9. The inoculant according to claim 1 , wherein the particulate ferrosilicon based alloy and the particulate SbOis added ...

Cast iron inoculant and method for production of cast iron inoculant

An inoculant for the manufacture of cast iron with spheroidal graphite is disclosed, the inoculant has a particulate ferrosilicon alloy having between 40 and 80% by weight of Si; 0.02-8% by weight of Ca; 0-5% by weight of Sr; 0-12% by weight of Ba; 0-15% by weight of rare earth metal; 0-5% by weight of Mg; 0.05-5% by weight of Al; 0-10% by weight of Mn; 0-10% by weight of Ti; 0-10 by weight of Zr; the balance being Fe and incidental impurities in the ordinary amount, wherein the inoculant additionally contains, by weight, based on the total weight of inoculant: 0.1 to 15% of particulate Sb 2 S 3 , and optionally between 0.1 and 15% of particulate Bi 2 O 3 , and/or between 0.1 and 15% of particulate Sb 2 O 3 , and/or between 0.1 and 15% of particulate Bi 2 S 3 , and/or between 0.1 and 5% of one or more of particulate Fe 3 O 4 , Fe 2 O 3 , FeO, or a mixture thereof, and/or between 0.1 and 5% of one or more of particulate FeS, FeS 2 , Fe 3 S 4 , or a mixture thereof, a method for producing such inoculant and use of such inoculant.

CAST IRON INOCULANT AND METHOD FOR PRODUCTION OF CAST IRON INOCULANT

An inoculant for the manufacture of cast iron with spheroidal graphite is disclosed, the inoculant has a particulate ferrosilicon alloy having 2. The inoculant according to claim 1 , wherein the ferrosilicon alloy comprises between 45 and 60% by weight of Si.3. The inoculant according to claim 1 , wherein the ferrosilicon alloy comprises between 60 and 80% by weight of Si.4. The inoculant according to claim 1 , wherein the rare earth metals include Ce claim 1 , La claim 1 , Y and/or mischmetal.5. The inoculant according to claim 1 , wherein the inoculant comprises between 0.5 and 10% by weight of particulate BiS.6. The inoculant according to claim 1 , wherein the inoculant comprises between 0.1 and 10% of particulate BiO.7. The inoculant according to claim 1 , wherein the inoculant comprises between 0.1 and 8% of particulate SbO.8. The inoculant according to claim 1 , wherein the inoculant comprises between 0.1 and 8% of particulate SbS.9. The inoculant according to claim 1 , wherein the inoculant comprises between 0.5 and 3% of one or more of particulate FeO claim 1 , FeO claim 1 , FeO claim 1 , or a mixture thereof claim 1 , and/or between 0.5 and 3% of one or more of particulate FeS claim 1 , FeS claim 1 , FeS claim 1 , or a mixture thereof.10. The inoculant according to claim 1 , wherein the total amount of the particulate BiS claim 1 , and the optional particulate BiO claim 1 , and/or particulate SbO claim 1 , and/or particulate SbS claim 1 , and/or one or more of particulate FeO claim 1 , FeO claim 1 , FeO claim 1 , or a mixture thereof claim 1 , and/or one or more of particulate FeS claim 1 , FeS claim 1 , FeS claim 1 , or a mixture thereof is up to 20% by weight claim 1 , based on the total weight of the inoculant.11. The inoculant according to claim 1 , wherein the inoculant is in the form of a blend or a physical mixture of the particulate ferrosilicon alloy and the particulate BiS claim 1 , and the optional particulate BiO claim 1 , and/or particulate SbO ...

Process for the preparation of a cast iron melt

Verfahren zum regenerieren von entschwefelungsschlacke

Способ получения чугунных мелющих тел

Изобретение относится к производству чугунных изделий, в частности к получению чугунных мелющих тел, и может быть использовано для утилизации отходов медеплавильного производства. Способ включает подготовку шихты, содержащей в своем составе отходы медеплавильного производства, ее плавление с получением чугуна, разливку его в формы и извлечение из них чугунных отливок в виде мелющих тел. В качестве исходных материалов шихты используют смесь из шлака от медеплавильного производства, содержащего медь от 0,7 до 2,4%, и углеродистого восстановителя, из полученной массы изготавливают окатыши, которые высушивают и обжигают в восстановительной среде до получения металлизированных окатышей, которые загружают в дуговую печь и плавят с получением чугуна. Изобретение позволяет снизить стоимость изготовления мелющих шаров из чугуна, содержащего серу в количестве до 2%, при обеспечении их высокой износостойкости. 2 пр., 2 табл. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 634 535 C1 (51) МПК C21C 1/08 (2006.01) C22C 37/00 (2006.01) B02C 17/20 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2016134485, 23.08.2016 (24) Дата начала отсчета срока действия патента: 23.08.2016 Дата регистрации: Приоритет(ы): (22) Дата подачи заявки: 23.08.2016 (45) Опубликовано: 31.10.2017 Бюл. № 31 Адрес для переписки: 454014, г. Челябинск, а/я 2562 (56) Список документов, цитированных в отчете о поиске: RU 2016077 C1, 15.07.1994. BY 2 6 3 4 5 3 5 R U (54) Способ получения чугунных мелющих тел (57) Реферат: Изобретение относится к производству чугунных изделий, в частности к получению чугунных мелющих тел, и может быть использовано для утилизации отходов медеплавильного производства. Способ включает подготовку шихты, содержащей в своем составе отходы медеплавильного производства, ее плавление с получением чугуна, разливку его в формы и извлечение из них чугунных отливок в виде мелющих тел. В качестве исходных материалов шихты используют ...

Device for teeming molten metal

A casting device, particularly a converter (1) for casting and/or post-treating molten metal, is provided with a tipping mechanism. A tipping arm (5) comprises at least two rotation or tipping axes (3, 6), while a guiding segment (14) associated to the tipping arm (5) has a plurality of bends corresponding to the tipping axes (3, 6). This segment (14) is actuated by a motor and is surrounded by at least one chain (17).

Dephosphorization method for molten iron

Способ дроблени свободно вытекающей струи расплава

Machining with mechanical mixing of fused chromium-bearing iron

FIELD: process engineering. SUBSTANCE: invention relates to metallurgy and can be used at refining during mechanical mixing of chromium-bearing fused iron in container for refining. Said container features inner wall horizontal cross-section composed of blade mixer. The latter is composed by an integral part with axial rod coated with refractory material and revolving about horizontal axis of axial rod with vertical rotational axis. At mixing, regularly or irregularly, mixing mode is changed from concentric mixing of fused iron with centring over the container central axis of mixer rotational axis and eccentric mixing with decentring relative to container central axis. EFFECT: longer life. 12 cl, 1 tbl, 6 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 556 195 C2 (51) МПК C21C 1/02 (2006.01) C21C 7/064 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ 2012133630/02, 08.12.2010 (24) Дата начала отсчета срока действия патента: 08.12.2010 Приоритет(ы): (30) Конвенционный приоритет: (72) Автор(ы): СУГИУРА,Масаюки (JP), МОРИ,Масакадзу (JP), ЙОСИНО,Такахиро (JP) 07.01.2010 JP 2010-002408 (43) Дата публикации заявки: 20.02.2014 Бюл. № 5 R U (73) Патентообладатель(и): НИССИН СТИЛ КО., ЛТД. (JP) (45) Опубликовано: 10.07.2015 Бюл. № 19 933719 A, 07.06.1982. SU 436091 А, 15.07.1974; . SU 865931 А, 23.09.1981. JP 2001-262212 A, 26.09.2001. (85) Дата начала рассмотрения заявки PCT на национальной фазе: 07.08.2012 2 5 5 6 1 9 5 (56) Список документов, цитированных в отчете о поиске: JP 2009-114506 A, 28.05.2009. SU 2 5 5 6 1 9 5 R U JP 2010/072051 (08.12.2010) C 2 C 2 (86) Заявка PCT: (87) Публикация заявки PCT: WO 2011/083655 (14.07.2011) Адрес для переписки: 129090, Москва, ул. Б.Спасская, 25, стр.3, ООО "Юридическая фирма Городисский и Партнеры", пат.пов. Ю.Д.Кузнецову, рег.N 595 (54) СПОСОБ ОБРАБОТКИ С МЕХАНИЧЕСКИМ ПЕРЕМЕШИВАНИЕМ ХРОМСОДЕРЖАЩЕГО РАСПЛАВЛЕННОГО ЖЕЛЕЗА (57) Реферат: Изобретение относится к области ...

一种球墨铸铁生产用球化装置及球化工艺

本发明公开了一种球墨铸铁生产用球化装置及球化工艺，球化装置包括封盖，封盖包括从上到下依次连接的顶板、储料机构、承托板、卸料机构、底板，底板上设有能够通到顶板上方的中心筒，顶板设有往储料机构中补充硅铁粒的进料口，承托板设有让储料机构中的硅铁粒卸到底板上的卸料口，顶板设有与卸料口连通的通风口，底板设有能够将硅铁粒散布到球化筒内的散料口，卸料机构用于调节散料口敞开或闭合的状态。球化工艺：先将混合铁水倒入球化筒内，盖上封盖；打开储料机构，让硅铁粒落到卸料机构和底板上；敞开卸料口，使硅铁粒落到混合铁水的表面进行浮硅孕育；将球化包芯线从走线通道送入混合铁水进行球化反应。本发明能够提高工人的操作安全性。

Dephosphorizing agent for molten iron

Модификатор дл чугуна

Область применени  - производство чугунных отливок без отбела. Сущность предложенного решени  заключаетс  в дополнительном вводе в состав модификатора цир- кони  и/или титана при следующем соотношении компонентов, мас.%: Sr 0,1- 10 Са менее 0,1; Si 15-90; Zr и/или 110,3-10 и Fe и примеси - остальное. При этом оптимальным  вл етс  следующий состав, мас.%: SrO,4-1,0; Са менее 0,1; Si 15-90; Zr 0,5-5,0; Ti 0,3-2,5 и Fe и примеси остальное. Дополнительный ввод в состав модификатора Zr и/или TI обеспечивает уменьшение степени отбела в отливках из чугуна, 1 з.п. ф-лы, ТО табл.

Sintered body for use of desulfurization of molten iron and its manufacture

Method of melt treatment with magnesium

FIELD: metallurgy. SUBSTANCE: to produce melt treated with magnesium and containing nonmetallic inclusions in the amount of less than 100 g/t, magnesium is introduced to depth from surface of melt of not less than 200 mm. Magnesium evaporation is regulated with production of mixing energy of not less than 100 W/cu.m. Formed above melt surface in reaction vessel is nonoxidizing atmosphere. Magnesium may be introduced in the form of pure lumpy or granulated magnesium or in mixture with reaction-neutral substance, for instance, iron fillings with content of magnesium in mixture of not less than 40%. EFFECT: higher efficiency. 7 cl, 2 dwg ОС АСТсС ПЧ Го РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (19) ВИ "” 2 127 320. 13) СЛ 51) МК’ С 24 С 1/10, С 22 С 33/40 12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21), (22) Заявка: 4894810/02, 21.11.1990 (30) Приоритет: 28.11.1989 СН 4258/89 (46) Дата публикации: 10.03.1999 (56) Ссылки: ОО, 242637, А, 04.02.87. ЗЦ 133418, А, 15.11.62. 5Ц 95348, А, 08.03.57. $4 411388, А, 03.09.75. $Ц 1475929, АЛ, 30.04.89. 54 1379313, АД, 07.03.88. $4 1081212, А, 23.03.84. ОЕ 36032771, А, 06.11.86. СВ 2162203, А, 29.06.86. Ц$ 3788624, А, 29.01.74. 4Р 52-16964, А, 12.05.77. ЕР, 0041680, АЛ, 16.12.81. ЕР, 0058999, АЛ, 01.09.82. \!О 82038715, АТ, 11.11.82. (98) Адрес для переписки: 103735, Москва, ул.Ильинка, 5/2, Союзпатент, Патентному поверенному Дудушкину С.В. (71) Заявитель: Георг Фишер АГ (СН) (72) Изобретатель: Иво Хених (СН) (73) Патентообладатель: Георг Фишер АГ (СН) (54) СПОСОБ ОБРАБОТКИ РАСПЛАВА МАГНИЕМ (57) Реферат: Изобретение относится к области металлургии. По способу обработки расплава магнием для получения обработанного расплава, содержащего неметаллические включения в количестве менее 100 г/т, магний вводят на глубину от поверхности расплава не менее 200 мм. Регулируют испарение магния с получением энергии смещения не менее 1000 Вт/мЗ3 Над поверхностью расплава в реакционном сосуде создают неокислительную атмосферу. ...

提高重轨钢洁净度的冶炼方法

本发明公开了一种提高重轨钢洁净度的冶炼方法，属于钢铁冶金技术领域。本发明解决的技术问题是现有国内重轨钢洁净度难以满足高速铁路的要求。该方法包括铁水预处理、转炉冶炼、LF精炼、RH精炼和连铸，该方法在转炉冶炼过程以活性石灰、石英砂、高镁石灰、炼钢污泥球和纯碱为造渣材料对铁水进行吹炼，将P含量控制在0.003％以内。本发明通过上述步骤可控制钢轨中P≤0.0060％、S≤0.0030％、O≤0.0010％、N≤0.0050％以及H≤0.00015％，P+S+O+N+H≤160ppm，夹杂物各类评级≤1.0级，显著提高了重轨钢洁净度，具有一定的社会效益，值得推广应用。

Electric steel sheet and refining method for electric steel sheet

본 발명은 중형발전기, 범용모터, 소형모터 등의 소재로 널리 사용되며, 철손의 범위가 2.7~3.5W/Kg으로 낮게 형성되는 저 철손 무 방향성 고급 전기강판 및 제조 방법에 관한 것으로서, 보다 상세하게는 제강공정에서 탄소(C) 30ppm 이하, 실리콘(Si) 1.5~3.0중량%, 망간(Mn) 0.1~0.4중량%, 인(P) 0.02중량% 이하, 황(S) 30ppm 이하, 알루미늄(Al) 0.2~0.6중량%, 질소(N) 40ppm 이하 및 티타늄(Ti) 30ppm 이하를 함유하고, 잔부가 Fe 및 불순물로 된 저 철손 무 방향성 전기강판 및 제조 방법에 관한 것이다. The present invention is widely used as a medium power generator, a general-purpose motor, a small motor, and the like, and relates to a low iron loss non-oriented high-grade electrical steel sheet and a manufacturing method of which iron loss ranges as low as 2.7 to 3.5 W / Kg. In the steelmaking process, carbon (C) 30 ppm or less, silicon (Si) 1.5-3.0 wt%, manganese (Mn) 0.1-0.4 wt%, phosphorus (P) 0.02 wt% or less, sulfur (S) 30 ppm or less, aluminum (Al) The present invention relates to a low iron loss non-oriented electrical steel sheet containing 0.2 to 0.6% by weight, 40 ppm or less of nitrogen (N), and 30 ppm or less of titanium (Ti), the balance being Fe and impurities. 철손, 무 방향성, 전기강판, 용선, 용강, 전로, 래들, 슬래그, 전로정련. Iron loss, non-directional, electrical steel, molten iron, molten steel, converter, ladle, slag, converter.

溶銑の脱リン方法

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Desulfurizing agent for molten iron

融鉄の脱硫剤及びその製法

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Spheroidal graphite cast iron

[Problem] To provide a spheroidal graphite cast iron having higher strength and higher ductility [Solution] A spheroidal graphite cast iron containing, in terms of mass%, 3.3 to 4.0% C, 2.1 to 2.7% Si, 0.20 to 0.50% Mn, 0.005 to 0.030% S, 0.20 to 0.50% Cu, and 0.03 to 0.06% Mg with the remainder being Fe and unavoidable impurities, the tensile strength being 550 MPa and elongation being 12% or more.

熔融还原炼铁的电弧炉装置

本发明涉及熔融还原炼铁的方法和装置，将原料成型物置于熔融炼铁装置中，加热还原成金属铁，原料中的各种铁的氧化物被还原金属化率达到40～95％后，对还原炉产品继续进行加热并熔化，生产直接还原钢水或类似高炉生产的铁水。所述原料为呼吸壳或半呼吸壳或敞开壳，或三者的结合。呼吸壳、半呼吸壳和敞开壳的包壳用氧化钙或碳酸钙或碳化钙，或上述材料的结合，加入粘接剂制成。本发明提供的装置为电弧炉、埋弧电弧炉、转炉和感应炉等。还原产品加热熔化后，向电弧炉内吹入氧气或惰性气体，以便于除渣。采用包壳技术，有效的防止被还原物质在过程中氧化，避免成型物间因接触而造成粘结，结合吹入气体，利于造渣，渣铁分离效果好，生产的钢铁产品质量好。

一种基于资源综合利用手段生产稀土镁硅铁合金的方法

本发明公布了一种基于资源综合利用手段生产稀土镁硅铁合金的方法，其针对目前稀土硅铁合金冶炼废渣难以资源化利用的难题，并克服硅热法生产稀土镁硅铁合金传统工艺上的诸多不足，提供一种基于针对稀土硅铁合金冶炼废渣进行资源综合利用，采用硅热法一步制备得到具有高镁特征的稀土镁硅铁合金，且工艺流程简便，冶炼废渣中稀土回收率高、镁元素的还原率及合金得率高的方法。本发明方案解决了长期以来稀土硅铁合金冶炼废渣存在环境影响和难以资源化利用的产业症结，提供了一种生产稀土镁硅铁合金的新工艺途径，在产业实践方面具有经济和技术可行性。

Apparatus for treating molten material

気体酸素吹込みによる溶銑の優先脱Ｓｉ方法

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

大型厚断面缸筒球铁件的铸造方法和铸造结构

一种大型厚断面缸筒球铁件的铸造方法和铸造结构，该方法包括：砂型铸造：将铸件型腔分成A部铸型、B部铸型、C部铸型和D部铸型四段组成；铁液制备：称取以下质量百分比的原料：生铁35％～45％，废钢30％～35％，回炉料25％～30％，增碳剂：生铁、废钢、回炉料总量的0.6％～1.0％；球化、孕育，将铁液扒渣、静置，当温度降至1270℃～1360℃时将铁液浇注至铸造结构中以形成铸件；浇注同时用孕育粉进行随流孕育，孕育粉的加入量为原铁液总量的0.1％～0.12％；待铸件冷却后，得到本发明的球墨铸铁缸筒铸件。具有“堆积木式”铸造方法，模具制作、配箱操作都非常方便，而且不易出现缩孔、缩松、夹砂等铸造缺陷的优点。

Compacted agent for roller melt treating

FIELD: metallurgy. SUBSTANCE: compacted agent contains, wt %: calcium carbide 20-30, ash of soda 10-15, fluorspar 15-30, magnesium addition alloy is the rest. The alloy containing 50% silica, 10% calcium, 10% magnesium, the rest is iron is used as the magnesium addition alloy. EFFECT: invention makes it possible to obtain the high-alloyed cast iron with minimal sulfur content in its composition, nonmetallic inclusions, with the homogeneous structure and properties, which guarantees the increase of the performance criteria of the rolls. 2 cl, 2 tbl РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 625 379 C1 (51) МПК C22C 33/08 (2006.01) C21C 1/08 (2006.01) B22D 25/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ФОРМУЛА (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ 2016107868, 03.03.2016 (24) Дата начала отсчета срока действия патента: 03.03.2016 Дата регистрации: Приоритет(ы): (22) Дата подачи заявки: 03.03.2016 (45) Опубликовано: 13.07.2017 Бюл. № 20 (56) Список документов, цитированных в отчете о поиске: SU 1822444 A3, 15.06.1993. RU 2315814 С2, 27.01.2008. DD 226905 A, 04.09.1985. DE 2852380 A, 19.06.1980. 2 6 2 5 3 7 9 R U (57) Формула изобретения 1. Компактированный реагент для обработки чугунного расплава, содержащий компоненты при следующем соотношении, мас. %: карбид кальция 20-30, кальцинированная сода 10-15, плавиковый шпат 15-30, магниевая лигатура - остальное, отличающийся тем, что в качестве магниевой лигатуры используют железо-кремнийкальций-магниевый сплав, содержащий, мас.% : кремний 50, кальций 10, магний 10, железо - остальное. 2. Компактированный реагент по п. 1, отличающийся тем, что он имеет коэффициент усвоения магния чугунным расплавом η=0,45-0,8. Стр.: 1 C 1 C 1 (54) Компактированный реагент для обработки валкового расплава 2 6 2 5 3 7 9 Адрес для переписки: 241035, Брянск, б-р 50-летия Октября, 7, ГОУ ВПО "Брянский государственный технический университет", патентная группа (73) Патентообладатель(и): ФЕДЕРАЛЬНОЕ ...

Method for producing fibre-forming copolymers of acrylonitrile

1457234 Two-stage spheroidization of iron DEERE & CO 20 May 1975 [20 May 1974] 21429/75 Headings C7A and C7D Spheroidal graphite iron is produced by treating iron initially with a spheroidizing agent to provide a residual content of 0À02-0À055% and subsequently treating it with a second agent containing 0À8-1À8% of magnesium whereby the result corresponds to that which would have been obtained from 0À03-0À075% of the initial agent. The latter may be a conventional Mg - containing material, while the secondary treatment may be carried using a Ni-Mg alloy or one containing, in percentage by weight: - the amount of the alloy added being 0À4 to 0À8% of the melt.

Gray cast iron inoculant

본 발명은 0.1 내지 10중량%의 스트론튬, 0.35 중량% 미만의 칼슘, 1.5 내지 10 중량%의 알루미늄 및 0.1 내지 15 중량%의 지르코늄을 함유하는, 회주철용 규소철 접종제에 관한 것이다. 접종제, 접종제를 제조하는 방법, 용융물을 접종시키는 방법 및 접종제로 접종한 회주철이 포함된다. The present invention relates to a silicon iron inoculum for gray cast iron containing 0.1 to 10% by weight of strontium, less than 0.35% by weight of calcium, 1.5 to 10% by weight of aluminum and 0.1 to 15% by weight of zirconium. It includes an inoculum, a method of preparing an inoculum, a method of inoculating a melt, and a gray cast iron inoculated with an inoculum.

混銑車の運用方法およびその設備

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。