СПОСОБ ЗАПУСКА ПЛАВИЛЬНОГО ПРОЦЕССА

FIELD: metallurgy. SUBSTANCE: melting device contains the melting vessel, containing the main chamber, that contains the bath of slag and molten metal with the frozen slag layer. At that the method includes the following steps: (a) inserting of the external ignition source into the main chamber of the melting vessel to form the heating zone in the main chamber, (b) start of supply the cold oxygen containing gas into the main chamber and igniting of the combustible material in the main chamber, (c) start of supply the carbonaceous material into the main chamber and temperature increasing in the main chamber, and melting of the frozen slag layer in the main chamber, and (d) start of supply the metal containing material into the main chamber and melting the metal containing material and producing the molten metal in the main chamber. EFFECT: recognition of the necessity to create the essentially large and stable heating zone for ignition of oxygen and coal in the melting vessel main chamber by means of the independent facilities. 21 cl, 2 dwg 2624572 С 2 ко РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (1 з ава в 0 ВО < я о. ЗА # К С2 (51) МПК С21В 1300 (2006.0Т) (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2014124754, 06.12.2012 (24) Дата начала отсчета срока действия патента: 06.12.2012 Дата регистрации: 04.07.2017 Приоритет(ы): (30) Конвенционный приоритет: 06.12.2011 АЗ 2011905072 (43) Дата публикации заявки: 27.01.2016 Бюл. № 3 (45) Опубликовано: 04.07.2017 Бюл. № 19 (85) Дата начала рассмотрения заявки РСТ на национальной фазе: 07.07.2014 (86) Заявка РСТ: АП 2012/001481 (06.12.2012) (87) Публикация заявки РСТ: УГО 2013/082653 (13.06.2013) Адрес для переписки: 191036, Санкт-Петербург, а/я 24, "НЕВИНПАТ" (72) Автор(ы): ПИЛОТ, Жак (АО), ДРАЙ, Родни Джеймс (АП), МЕЙЕР, Хендрикус Конрад Альбертус (МТ. (73) Патентообладатель(и): ТЕКНОЛОДЖИКАЛ РЕСОРСИЗ ПТИ. ЛИМИТЕД (АО) (56) Список документов, цитированных в отчете о поиске: КО ...

Фурма

Herstellung von Kugellagerstahl im basischen Siemens-Martin-Ofen

Verfahren zur Gewinnung von Stahl im SM-Ofen unter Verwendung von Sauerstoff

SIEMENS-MARTIN-OFEN

Schmelzofen zur Herstellung von Stahl und Verfahren zum Betrieb des Ofens

Verfahren zur Entfernung von Schlacken bei der Gewinnung von Flusseisen und -stahl im Herdofen sowie bei der Darstellung von vorgefrischtem Eisen im Herdofen zwecks Weiterverarbeitung in einer beliebigen Vorrichtung unter nachtraeglicher weiterer Zugabe von Eisen zu dem anfaenglich in den Herdofen eingebrachten Eisen

Improvements in or relating to the Production of High Grade Steel and Slag Rich in Soluble Phosphates.

... 19,640. Deutsch - Luxemburgische Bergwerksund H³tten Akt.-Ges., and V÷gler, A. Sept. 4. Ore and cast-iron processes.-Steel and a slag rich in soluble phosphates are obtained in an open hearth or electric furnace by treating the metal with ore and lime until the slag formed has attained the desired percentage in soluble phosphates, removing this finished slag by blowing with air or gas or a mixture of air and gas, forming a finishing slag by further additions, and finishing, and then removing the metal while the finishing slag is retained in the furnace for the treatment of a subsequent charge. The process is carried out in a tilting furnace.

Process for reduction of iron oxides

A process for the reduction of iron oxides, e.g. oxidic iron ore, comprises feeding briquettes of the oxides and the fuel required for the reduction in at one end of an open-hearth furnace having a charge of carbon-containing iron alloy and withdrawing the slag formed at the other end. The briquettes are preferably supplied at the burner end and the slag removed at the flue end. Air, which may be pre-heated, or air enriched with oxygen, is blown into the furnace to burn the carbon monoxide produced by the reduction and the volatile material from the fuel, the furnace burners being used only for initial heating and for regulation of the furnace temperature. The briquettes may be supplied at the longer side of a reverberatory furnace where they pile up and form a trough containing the melt of alloy and slag. In this case, the floor of the furnace at the charging point is disposed so high that only a shallow melt forms. Moreover the oxygen-containing gases are then blown directly through the ...

Method and apparatus for refining molten metal

... 1,127,055. Measuring carbon content of ore electrically. UNITED STATES STEEL CORP. Aug. 11, 1966 [Aug.26, 1965], No.36052/66. Heading G1N. The quantity of carbon removed during the refining of a bath of iron ore in a fuel-fired furnace is determined by measuring the difference between the carbon input to and output from the furnace. The carbon input is determined by positioning a first potentiometer slider 6 in accordance with the mass flow-rate of fuel, followed by a second potentiometer slider 16 positioned in accordance with the predetermined percentage of carbon content of the fuel. Thus the signal at 16 represents the rate of carbon input to the furnace via the fuel. The carbon output is determined by positioning a potentiometer slider 22 in accordance with the percentage of CO 2 in the waste gas, the potentiometer 24 being fed with a voltage derived from a transducer 27 measuring the mass rate of flow of waste gas and modifying this voltage by variable resistors 25, 26 so that the ...

Improvements in or relating to the Treatment of Iron and Steel Turnings, Scrap and the like.

... 126,369. Hadfield, Sir R. A. Jan. 16, 1917. Scrap processes.-The re-melting of iron and steel turnings, scrap, and the like is effected by charging the turnings &c. into an acid-lined openhearth furnace having its bottom and sides covered with a mixture of crushed ferro-silicon and anthracite or other carbonaceous material of good quality. The charge of turnings &c. may be introduced in batches, the first batch being melted quickly, and a layer of the ferro-silicon and carbonaceous mixture is spread on the sides of the furnace before the second and every later batch is charged into the furnace. Ferro-manganese may be added to the molten bath to eliminate sulphur, or the molten metal may be refined in an electric or other separate furnace to reduce the percentage of sulphur by an ordinary refining process. If desired, some iron ore and also a small quantity of pig iron may be charged into the melting furnace.

METHOD OF HEATING OR MELTING METALS

... 1284309 Gas or liquid fuel burners UNION CARBIDE CORP 16 Dec 1969 [17 Dec 1968] 61123/69 Heading F4T [Also in Division C7] A burner for producing a flame containing molten or semi-molten particles for improving heat transfer includes a conduit 12 for a suspension of the particles in a liquid fuel, the conduit communicating through passage 14 with swirl chamber 16 which discharges through orifice 18 into throat 20. Oxygen is supplied through passage 22 and vanes 24 to the throat while coolant is passed through passages 11, 13, 15, 17. The burner is used for melting charges of scrap metal.

Method of reducing the melting time of a charge of ferrous metal or alloy thereof in metallurgical furnaces

The melting time of a charge of ferrous metal or alloy thereof, in a metallurgical furnace, is reduced by directing at the charge a flame and a stream of oxygen and a stream of powdered metallic material which at the melting temperature of the charge undergoes an exothermic reaction. These streams are maintained till the charge has melted substantially level when the streams of metallic material and oxygen are terminated, heating of the charge by the flame being continued till the charge is refined. The metallic material used may be Fe or Si or a mixture of these two or a p mixture of Fe, Ca, Mn, and Si with or without Al.

Improvements in the manufacture of steel

... 872,718. Refining iron. DEMAG A.G, and SCHMITT, W. April 24, 1958, No. 13109/58. Class 72 [Also in Groups XI and XII] Melting down in an open hearth furnace is carried out using a gas burner with a number of fine jets supplied with gas at 1,000-4,000 millimeters water column, the refining being carried out using a long flame produced by the use of a jet of gas, oil, or powdered coal injected into the hot air at low pressure. As shown, burners 10 have their outermost jets directed parallel to the walls of the furnace while the inner jets are progressively increasingly inclined towards the centre.

STEELMAKING IN OPEN HEARTH FURNACES

... 1453051 Burner fired open hearth furnaces BRITISH STEEL CORP 11 Jan 1974 [11 Jan 1973] 1566/73 Heading F4B [Also in Division C7] In the end walls of an open-hearth furnace 1 there are mounted burners 7, 8 which are axially movable towards the charge to follow the "melting front"; they may be downwardly inclined, preferably at 7-11 degrees, and may be fired with fuel and oxygen. Alternatively oxygen may be supplied from a separate lance alongside the burner. During at least part of the melting operation, after scrap charging is complete, both burners are fired simultaneously using oxygen to give a high melting rate, the combustion products being exhausted through both of the offtakes 14, 15.

Improvements in or relating to fuels for furnaces

A fuel for combustion in a furnace wherein at least part of the heat transfer from the flame is by radiation, comprises a residual fuel oil that has been treated with a precipitating agent to give a suspension in the remainder of the fuel oil comprising solid components having a molecular weight greater than 1000. The oil may be treated between 1 second and 24 hours before combustion. The precipitating agent may be a paraffinic hydrocarbon having from 3 to 20 carbon atoms in the molecule, and may be an extracted kerosene fraction. The precipitating agent is added in an amount between 20 and 80% by weight based on the fuel oil. The size of the particles suspended in the oil may be between 0.5 micron and 150 microns, and preferably at least 10% by weight have diameters less than 0.5 micron, and at least 10% by weight greater than 10 microns. The residual fuel may be a bottoms fraction obtained by straight-run distillation of crude petroleum, a cracked product from a crude petroleum or a flashed ...

Process of implementation of metallurgical processes and device allowing the application of this process.

Method of operating metallurgical processes and apparatus for carrying out the method

IN AN [...]rETRACTABLE ONEoXYGEN LANCE FOR FRESH OF STEEL

IN AN [...]rETRACTABLE ONEoXYGEN LANCE FOR FRESH OF STEEL

Procedure for the carbon elimination from liquid pig iron in a spraying fresh plant as well as spraying fresh plant to the execution of the procedure

Procedure for manufacturing steel

Double furnace for the production of steel by carbon elimination of iron with oxygen and/upper air

Procedure for the production of steel by blowing up oxygen

PRODUCING STEEL IN OPEN-HEARTH FURNACES

OPEN HEARTH FURNACE

APPARATUS FOR PROCESSING MOLTEN METAL

Verfahren zur Herstellung von Stahl.

Verfahren zur Herstellung von Stahl.

Verfahren zum Frischen von Roheisen.

Procédé et brûleur pour le chauffage de matières fondues contenues dans la chambre de fusion d'un four

Procédé pour ramener et maintenir la flamme dans l'axe d'un four Martin et dispositif pour la mise en oeuvre de ce procédé

Procédé pour l'affinage de métaux

Procédé d'affinage des métaux

Procédé pour la production de l'acier

Verfahren für die schnelle Aufwärmung von Metall im festen Aggregatzustand

Abdichtungsvorrichtung an einem Tandemofen mit kippbaren Ofengefässen

Lance d'injection d'oxygène

FURNACE WITH INJECTION AT SPEED OF SOUND

STARTING A SMELTING PROCESS

СОСУД ПРЯМОГО ПЛАВЛЕНИЯ, УСТАНОВКА ПРЯМОГО ПЛАВЛЕНИЯ И СПОСОБ ПРЯМОГО ПЛАВЛЕНИЯ

Описан сосуд прямого плавления для оперирования процессом прямого плавления на основе ванны расплава при наличии давления в сосуде. Сосуд имеет подогревательную камеру для непрерывного выпуска жидкого металла из сосуда. Подогревательная камера имеет соединительный канал, который проходит сквозь боковую стенку сосуда внутрь нее. Соединительный канал выполнен для ослабления влияния внезапных изменений давления в сосуде на поток жидкого металла в подогревательной камере, которые могут приводить к нежелательному выбросу жидкого металла с подогревательной камеры. Соединительный канал также выполнен так, что жидкий металл не затвердевает в нем в течение минимум 6 часов, когда он не выпускается из сосуда в подогревательную камеру сквозь соединительный канал.

INITIATION OF MELTING PROCESS

SONIC INJECTION FURNACE

A method for removing slags of metal and steel baths

Improvements in the manufacture of steel for rails of tram and railroads

Process of insulation of the pyridine-carbonic acids

Method for the manufacture of iron and steel, and furnaces for the practice

METHOD FOR IMPROVING THE LIFE OF THE REFRACTORY LINING OF THE REFINING VESSEL OF A SPRAY REFINING PLANT

Metallurgical process and apparatus

Apparatus of carbon analysis

Process for the steelmaking in the open hearth furnace with addition of the scrap melted with the cupola furnace

Process for the furnace pipe Martin

Process of obtaining steel to the open hearth furnace starting from pig iron and cast iron with high silicon content

Process of production to Siemens-Martin the basic furnace of a steel of high tenacity, cold brittleness, and sensitivity to ageing and the rupture with blue, reduced

Steel-making from charge of cold scrap - involves supplying slag-forming material in powder form and in cyclical mode

Process and device improved for the intensive use of oxygen in the open hearth furnaces, for the production of steel

Process of production of a steel on improved surface

Method of abbreviating the duration of loads in the hearth steel making

Molten steel gas treatment appts. - introduces gas and powder through downward inclined fan-line nozzles

A device for treating liquid metal in steel melting vessels with gases or powders consists of a support plate in which a supply tube for the gas or powder, e.g. graphite in a stream of compressed air, is held. The distal end of this tube is spread out fan-like into several outlet branches at an angle to each other and inclined downwards. All outlets lie in the same plane. Another tube in the support plate, concentric or separate, introduces a blast of gas along the tube outside. This keeps the tube clear of spattering metal or slag. Applied to open-hearth or arc furnaces, it raises the productivity, improves the effectiveness of the powder additive, and reduces the price of the molten steel.

Improvements in and relating to the Refining of Iron.

IMPROVEMENTS IN A CHAMBER FOR A FURNACE SIEMENS-MARTIN AND A METHOD TO PRODUCE STEEL IN A FURNACE SIEMENS-MARTIN THAT INCLUDES THIS CHAMBER

IRON MANUFACTURE.

Automatic fuel regulation of open hearth furnaces

КОПИЛЬНИК

1. Копильник для емкости для прямой плавки, содержащей область горна для удержания расплавленного материала, при этом копильник выполнен с возможностью удержания объема расплавленного материала и включает в себя выпускное отверстие в верхней секции для выпуска потока расплавленного материала из копильника, при этом предусмотрено присоединение копильника в нижней секции копильника для подачи потока расплавленного материала в копильник из области горна емкости, причем присоединение копильника содержит переходную летку, имеющую вход переходной летки, предназначенный для того, чтобы расплавленный материал протекал в переходную летку из области горна, и выход переходной летки для подачи потока расплавленного материала из переходной летки в копильник, при этом при пустом копильнике имеется неограниченная линия обзора через присоединение копильника к входу переходной летки, проходящая с местоположения, которое находится с внешней стороны и над уровнем верхней секции копильника. ! 2. Копильник по п.1, в котором переходная летка присоединения копильника включает в себя верхнюю стенку, которая отклонена вверх, если смотреть снаружи от входа переходной летки к выходу переходной летки. ! 3. Копильник по п.2, в котором верхняя стенка присоединения копильника находится под углом 20-40° к горизонтали. ! 4. Копильник по п.2, в котором верхняя стенка присоединения копильника находится под углом 25-35° к горизонтали. ! 5. Копильник по п.1, в котором переходная летка присоединения копильника имеет постоянное поперечное сечение вдоль всей своей длины. ! 6. Копильник по п.1, в котором копильник имеет L-образную форму на виде сбоку, с РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2008 141 768 (13) A (51) МПК C21C 5/04 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21), (22) Заявка: 2008141768/02, 22.03.2007 (71) Заявитель(и): ТЕКНОЛОДЖИКАЛ РЕСОРСИЗ ПТИ. ЛИМИТЕД (AU) (30) Конвенционный приоритет: 22.03.2006 AU 2006901473 (43) ...

Verfahren zur Erzeugung von Stahl aus phosphorreichem Roheisen und Schrott

Verfahren zur Herstellung von Stahl im Herdofen

Apparatus for controlling the operation of multiple combustion zones

... 982,039. Automatic control of air/fuel ratio. UNITED STATES STEEL CORPORATION. May 31, 1962 [June 12, 1961], No. 21053/62. Heading G3R. In a system for automatically controlling the air/fuel ratio of at least two burners, voltages corresponding to the proportion of one compound in the flue gases from each are combined with a voltage dependent on the rate of flow of one of the supplies to the burners and any unbalance between the resulting voltages and voltages dependent on the rates of flow of the other supplies to the burners is utilised to correct the air/fuel ratio. In an open hearth furnace 8 for making steel,a reversing valve 26 supplies liquid tar fuel alternately in opposite directions through burners 20 and 20W and combustion is assured by another, synchronized,reversing valve 18 supplying air alternately through regenerators 4 and 4W. Valve 18 also couples each side of the furnace alternately with a stack for removal of the exhaust gases which are sampled alternately through tubes ...

Improvements in and relating to a process for manufacturing steel having good machining properties

In the process of manufacturing steel as described in Specifications 318,177, [Class 72, Iron &c.], and 340,529, the additions (phosphorus, copper and sulphur or ferrous sulphur) are added to the molten material in the refining furnace or after it leaves that furnace, e.g. in a ladle or as it is being poured into the mould. Specification 339,946, [Class 72, Iron &c.], also is referred to.

Open-Hearth Furnace

... 1,151,707. Burners; open hearth furnaces. W. SCHMITT. 18 Aug., 1966 [19 Aug., 1965],No. 37116/66. Headings F4B and F4T. A burner for an open hearth furnace in which a plurality of divergent separate flames issues from each burner in spray-like fashion has a cooling jacket 1 divided by a cylindrical partition 1a divergent gas nozzles 3 and a central supply pipe 4 with a two-way valve 6 possessing connections for oxygen or a mixture of oxygen and air and for compressed air or steam respectively, the pipe 4 branching into manifolds 5. Liquid fuel or an additive such as iron dust or aluminium dust in finely dispersed form may be supplied to the separate flames.

Improvements in or relating to the manufacture of steels and alloy steels

In a process for the production of steel in the basic open hearth furnace, a charge containing 1,6 to 2,4 per cent of manganese is smelted to produce a steel containing 0,8-1,2 per cent of manganese and then the subsequent oxidation is carried out more rapidly than usual, e.g. for a period not exceeding one-half the normal period so as to transfer the bulk of the manganese to the slag. Basic compounds, such as lime, are then added to the bath and the temperature of the melt is increased to at least 1600 DEG C. so as to transfer the manganese in the slag continuously into the bath. This temperature is maintained for a comparatively long time e.g. 1 1/2 hours, periodical analyses of the content of the bath being made to ensure that the manganese content of the melt is increasing and that therefore the temperature of the bath is being maintained. The heating is continued until the desired carbon content of the steel is reached, and the metal is then tapped. Additions of alloy constituents ...

Improvements relating to the manufacture of steel

In a process for the manufacture of steel there is added to Siemens-Martin steel, steel made by the converter process which, after conversion has been treated outside the converter with silicon and/ or aluminium under a reducing slag. Basic Bessemer steel of which the phosphorus and nitrogen contents have been reduced or acid Bessemer steel which has been dephosphorized may be used. The Bessemer metal may be poured into a first ladle and from this into a second ladle in as large a stream as possible at the same time additions of ferrosilicon and/or aluminium are made under a white slag of finely ground lime and fluorspar. 75-5000 kgs of 90 per cent ferrosilicon and 100-500 kgs of aluminium may be added per 100 tons of steel. The mixed steel produced is stated to be superior to Siemens-Martin steel of the same composition.

Improvements in or relating to electric torches

... 533,011. Battery lamps. HOUGHTON, M. M. July 1, 1939, Nos. 19213/39 and 660/40. [Class 39 (ii)] A battery lamp in which the circuit between the battery 3 and the lamp 14 is completed (as by rotation of a cap 31) to move the battery axially until its contact 23 engages a contact 24 which is connected through a spring 22 to a contact 19 in contact with a lamp terminal 20 is provided with a rubber casing with a rubber plug closure member. The spring 22 acts as a shock absorber and opening of the circuit is effected by a spring 34, returning the battery when the cap 31 is unscrewed. A leaf spring 25 provides a connection between the socket of the lamp and the outer casing of the battery. Instead of using a separate reflector the shaped open end of the rubber casing may be pointed or enamelled to constitute a reflector.

Improvements in steel manufacture

A method of making steel comprises forming a mixture of an oxidizing gas and a diluent gas away from the surface of a steel bath and directing the blast on to the surface of the melt. The mixture may comprise oxygen and steam in equal volumes and the steam may be preheated. The blast may be applied by a lance retractably mounted on the roof of an open hearth furnace the discharge end of the lance being angled so that the mixture strikes the molten metal at an angle to the surface. A description of the lance is included (Group XII). Specification 793,655 is referred to.

Procedure for the carbon elimination from pig irons to steel

Melting furnace, that the production of steel serves and procedures for the enterprise of the same

IN EINEN WANNENOFEN EINFAHRBARE SAUERSTOFF- LANZE ZUM FRISCHEN VON STAHL

Procedure for the improvement of the durability of the fireproof lining of the fresh container of a spraying fresh plant

Procedure for the enterprise of a double furnace for the production of steel as well as double furnace for its execution

Procedure for the protection of the fireproof walls of an industrial furnace against radiation

METHOD OF OPERATING AN OPEN HEARTH FURNACE

STARTING A SMELETING PROCESS

Manufactoring process of steels containing of chromium in the basic Siemens-Martin furnace

Process of setting in ceuvre of the Siemens-Martin furnaces

Improvement with the hearths and process of fusion in these furnaces

Process to protect metals against oxidation and to prevent absorption degaz during fusion and refining

Improvements with the development of fused metals in the metallurgical furnaces with interior flame

Process of treatment of ferrous metals

Industrial furnace

Process for the manufacture of steel Martin-mho

Improvements, in particular with regard to the operations to be executed for their preparation, to metals as well as alloys, such, especially also, that the steel and steel alloys

Process for the production of steel

A method for accelerating refining with oxygen with the Siemens-Martin furnace

Process of pre-heating of grapeshot intended for the electric furnace

Process of formation or fast transformation of a slag to the open hearth furnace

METHOD OF MAKING STEEL

REFINING OF IRON

STARTING A SMELTING PROCESS

A method of starting a molten bath-based process for smelting a metalliferous material is disclosed. The method includes using the heat flux of water-cooled elements in lower parts of a smelting vessel to provide an indication of molten bath temperature during at least an early part of the start-up method and adjusting injection rates of oxygen-containing gas and/or carbonaceous material into the smelting vessel to control the molten bath temperature during start-up without exceeding critical heat flux levels and tripping the start-up method. 1. A method of starting a molten bath-based smelting process for a metalliferous material in a smelting vessel that defines a smelting chamber and producing molten metal , with the method including supplying a charge of hot metal into the smelting chamber , supplying feed materials into the smelting chamber and generating heat and forming molten slag and thereafter increasing the amount of molten slag in the smelting chamber , with the hot metal and the molten slag forming a molten bath in the smelting chamber , monitoring the heat flux of a side wall of the vessel in contact with the molten bath to obtain an indication of the temperature in the molten bath as the amount of slag increases towards the suitable slag inventory , and adjusting the supply rates of solid carbonaceous material and/or oxygen-containing gas into the smelting chamber to adjust the heat input into the smelting chamber and thereby control the temperature of the molten bath so that the bath temperature does not cause high heat fluxes in the side wall that trip the start-up sequence of the smelting process.3. The method defined in includes preheating the smelting chamber claim 2 , the forehearth claim 2 , and the forehearth connection.4. The method defined in includes preheating a hearth of the vessel claim 2 , the forehearth claim 2 , and the forehearth connection such that an average surface temperature of the hearth claim 2 , the forehearth claim 2 , and ...

Charge for steel melting in basic open-hearth furnace

FIELD: metallurgy. SUBSTANCE: invention relates to metallurgy and can be used in melting steels in basic open-hearth furnaces by scrap-process, including steels for car casting. Charge contains, wt%: conversion pig iron and scrap iron 34.0–40.0, steel scrap 60.0–66.0, carb in excess of 100 % 0.5–1.0, wherein as carb it contains slag-coal-graphite flux fraction 10–100 mm, containing, wt%: carbon 50.0–65.0, sulfur not more than 1, flux component based on dump open-hearth slag – the rest. EFFECT: invention increases recovery of carbon from carb, reduces harmful emissions into atmosphere, improves quality of metal, including for car casts, and improves technical and economic indices of melting. 1 cl, 2 tbl, 3 ex РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 731 710 C1 (51) МПК C21C 5/04 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК C21C 5/04 (2020.02); Y02P 10/212 (2020.02) (21)(22) Заявка: 2020110111, 11.03.2020 (24) Дата начала отсчета срока действия патента: Дата регистрации: 08.09.2020 (45) Опубликовано: 08.09.2020 Бюл. № 25 (54) Шихта для выплавки стали в основной мартеновской печи (57) Реферат: Изобретение относится к области металлургии мас. %: углерод 50,0-65,0, серу не более 1, и может быть использовано при выплавке сталей флюсовую составляющую на основе отвального в основных мартеновских печах скрап-процессом, мартеновского шлака остальное. Изобретение в том числе сталей для вагонных отливок. Шихта позволяет повысить усвоение углерода из содержит, мас. %: передельный чугун и чугунный карбюратора, снизить вредные выбросы в лом 34,0-40,0, стальной лом 60,0-66,0, карбюратор атмосферу, повысить качество металла, в том сверх 100% 0,5-1,0, при этом в качестве числе для вагонных отливок, и улучшить техникокарбюратора она содержит флюс шлако-угольноэкономические показатели плавки. 2 табл., 3 пр. графитовый фракции 10-100 мм, содержащий, R U 2 7 3 1 7 1 0 (56) Список документов, цитированных в отчете о поиске: RU ...

Method of producing cast iron with globular graphite

Изобретение относитс  к производству литейного чугуна с шаровидным графитом. Целью изобретени   вл етс  снижение себестоимости и повьшение безопасности работы. Способ заключаетс  в том, что сначала в жидкий чугун ввод т сферовдизатор в количестве, обеспечивающем его содержание в готовом чугуне 0,02 0 ,055 мас.%, а затем перед разливкой дополнительно ввод т магннйсодержащий сплав в количестве 0,251 ,5 мас.%, содержащий 0,8-1,8 мас.% .магни , 3 табл., 1 з.п. ф-лы. This invention relates to the production of nodular cast iron. The aim of the invention is to reduce the cost and increase the safety of work. The method consists in the fact that first the spherical viewer is introduced into the liquid iron in an amount that ensures its content in the finished cast iron 0.02 0.055 wt.%, And then before casting the magnet-containing alloy is added in an amount of 0.251, 5 wt.%, containing 0.8-1.8 wt.%. Magne, 3 tab., 1 Cp. f-ly.

Forehearth

FIELD: metallurgy. SUBSTANCE: reservoir 3 contains forehearth 67 for continuous tapping of melted metal from this reservoir. The forehearth has chamber 91 holding volume of melted metal with outlet port 93 for tapping melted metal from this chamber and open passage 97 running through a side wall of hearth into internal space of reservoir 3, thus communicating chamber 91 and internal space of reservoir 3. Open passage 97 moderates effect of rapid fluctuations of pressure in reservoir 3 to flow of melted metal into forehearth 67 and prevents undesirable slopping of metal from the forehearth. Also design of open passage 97 prevents melted metal freezing in the passage for at least 6 hours, when melted metal is not tapped from reservoir to the forehearth via the open passage. EFFECT: raised operational reliability. 30 cl, 5 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 402 616 (13) C2 (51) МПК C21B 13/00 (2006.01) F27D 3/14 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21), (22) Заявка: 2007143419/02, 26.04.2006 (24) Дата начала отсчета срока действия патента: 26.04.2006 (73) Патентообладатель(и): ТЕКНОЛОДЖИКАЛ РЕСОРСИЗ ПТИ, ЛИМИТЕД (AU) (43) Дата публикации заявки: 10.06.2009 2 4 0 2 6 1 6 (45) Опубликовано: 27.10.2010 Бюл. № 30 (56) Список документов, цитированных в отчете о поиске: RU 2001102322 А, 20.12.2002. US 6399016 В2, 04.06.2002. US 6565798 В2, 20.05.2003. RU 2002135612 А, 20.06.2004. RU 2003104829 А, 27.12.2004. 2 4 0 2 6 1 6 R U (86) Заявка PCT: AU 2006/000545 (26.04.2006) C 2 C 2 (85) Дата перевода заявки PCT на национальную фазу: 26.11.2007 (87) Публикация PCT: WO 2006/113969 (02.11.2006) Адрес для переписки: 129090, Москва, ул.Б.Спасская, 25, стр.3, ООО "Юридическая фирма Городисский и Партнеры", пат.пов. А.В.Мицу, рег.№ 364 (54) КОПИЛЬНИК (57) Реферат: Изобретение относится к емкости для прямой плавки, предназначенной для осуществления способа прямой плавки с использованием ...

PIGGER

1. Емкость для прямой плавки, предназначенная для осуществления прямой плавки с использованием жидкой ванны для плавки рудного исходного материала и получения расплавленного металла в условиях повышенного давления в емкости, причем емкость содержит: ! (а) горн, предназначенный для размещения слоя металла жидкой ванны, причем горн имеет основание и боковую стенку; ! (b) боковую стенку, проходящую вверх от упомянутой боковой стенки горна; ! (с) множество водоохлаждаемых фурм для ввода твердых веществ, которые проходят вниз и внутрь емкости для ввода твердых исходных материалов, таких как рудный исходный материал и/или углеродосодержащий материал, в эту емкость; ! (d) одну или более водоохлаждаемых фурм для ввода кислородосодержащего газа, проходящих вниз в емкость для ввода кислородосодержащего газа в эту емкость; и ! (е) копильник для непрерывного выпуска расплавленного металла из емкости, содержащий (i) камеру для удерживания объема расплавленного металла, имеющую выпускное отверстие для выгрузки расплавленного металла из этой камеры, и (ii) открытый проход, идущий через боковую стенку горна во внутреннее пространство емкости и таким образом соединяющий между собой упомянутую камеру и внутреннее пространство емкости, причем этот открытый проход обеспечивает смягчение влияния внезапных изменений давления в емкости на поток расплавленного металла в копильник, и предотвращение нежелательного выброса расплавленного металла из копильника, причем открытый проход выполнен таким образом, чтобы расплавленный металл не застывал в проходе в течение, по меньшей мере, 6 ч, когда расплавленный металл не выгружается из емко РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2007 143 419 (13) A (51) МПК C21C 5/04 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21), (22) Заявка: 2007143419/02, 26.04.2006 (71) Заявитель(и): ТЕКНОЛОДЖИКАЛ РЕСОРСИЗ ПТИ, ЛИМИТЕД (AU) (30) Конвенционный приоритет: 26.04.2005 AU 2005902093 (43) Дата ...

METHOD OF STARTING THE Smelting Process

1. Способ запуска процесса на основе плавильной ванны для плавки металлоносного загрузочного материала для образования расплавленного металла в плавильном устройстве, причем плавильное устройство содержит плавильный сосуд, содержащий основную камеру, которая содержит ванну расплавленного металла, и при этом способ включает этапы:(a) вставки внешнего источника воспламенения в основную камеру плавильного сосуда для образования зоны нагрева в основной камере,(b) начала подачи холодного содержащего кислород газа в основную камеру и воспламенения горючего материала в основной камере,(c) начала подачи углеродистого материала в основную камеру и увеличения температуры в основной камере, и расплавления застывших материалов в основной камере, и(d) начала подачи металлоносного материала в основную камеру и плавления металлоносного материала и производства расплавленного металла в основной камере.2. Способ по п. 1, отличающийся тем, что включает подачу горючего материала в основную камеру перед этапом (а) вставки внешнего источника воспламенения в основную камеру.3. Способ по п. 2, отличающийся тем, что включает подачу горючего материала в основную камеру путем ручной вставки горючего материала через отверстие в основной камере.4. Способ по п. 1, отличающийся тем, что включает подачу горючего материала в основную камеру после этапа (а) вставки внешнего источника воспламенения в основную камеру и перед этапом (b) начала подачи холодного содержащего кислород газа в основную камеру и воспламенения горючего материала в основной камере.5. Способ по п. 1, отличающийся тем, что включает начало подачи шлака или образующих шлак м� РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (51) МПК C21B 5/00 (13) 2014 124 754 A (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2014124754, 06.12.2012 (71) Заявитель(и): ТЕКНОЛОДЖИКАЛ РЕСОРСИЗ ПТИ. ЛИМИТЕД (AU) Приоритет(ы): (30) Конвенционный приоритет: 06.12.2011 AU 2011905072 (85) Дата начала рассмотрения ...

How to heat or dissolve the contents in a direct flame furnace

본 발명은 장입물 인접층이 장입물과 그 장입물 위쪽으로 지향된 하나이상의 버너로부터 방출하는 연소가스 사이에 형성되며, 그 장입물 인접층은 장입물에 대해 연소가스와는 다른 산화효과를 가지는 직화로에 관한 것이다.

Starting a smelting process

용융조 기반 제련 공정을 시동하는 방법은, 독립적인 수단, 즉, 저온 산소 및 석탄을 주챔버 내로 공급하는 것과 독립적으로 공급하기 전에, 제련 용기의 주챔버에서 산소 및 석탄의 발화를 위한 충분히 크고 안정한 "고온 구간(hot zone)"을 형성하는 단계를 포함한다.

Steel melting device

Steel is prepd. from a metallic charge consisting of scrap and cast iron by a method including successive addition to the furnace of a slagging agent, scrap and cast iron, then melting and adjusting the steel to the desired grade. The metal is carburised during fusion by powdered products blown into the liquid metal using a jet of gas. Specifically, after inserting the slag former into the furnace, a carbonaceous product is inserted along with the scrap. The process is esp. suitable using Martin furnaces fed with liq. cast iron. The time for homogenisation and adjustment to the desired compsn. can be reduced, while the proportion of molten cast iron used is reduced and the scrap increased. Hence, the price of the steel can be lowered. Carbon contents of over 0.3% can be produced in the steel half way through the refining step.

SONIC INJECTION OVEN

Process improvements for metal refining

Process for the treatment of ore fines and product obtained by this process

Process for operating siemens-martin furnaces and burner furnaces, for operating this process or similar process

Improvements to the low-hearth process for the manufacture of steel or pure iron

Steel fabrication

Steel making process

Refining steel in open hearth furnaces

Scrap and flux are added to the melt during blowing and the basic melt is cast onto a flux already in the hearth to form a primary slag. The melt is brought to 1550 degrees-1575 degrees C and blown with O2 while scrap is added at a rate ensuring the maintenance of melt temps. of at least 1500 degrees C. The furnace may be a Martin furnace. The process is quicker than prior art processes.

Process for the economical manufacture of steel in the martin furnace

Improvements in steelmaking

Patent FR2489841B1

High temperature burners

Steel prepn. by refining in a martin furnace - with introduction of scrap steel, coke and molten cast iron, and oxygen blowing with introduction of coke dust

Steel is prepd. from a metallic charge consisting of scrap and cast iron by a method including successive addition to the furnace of a slagging agent, scrap and cast iron, then melting and adjusting the steel to the desired grade. The metal is carburised during fusion by powdered products blown into the liquid metal using a jet of gas. Specifically, after inserting the slag former into the furnace, a carbonaceous product is inserted along with the scrap. The process is esp. suitable using Martin furnaces fed with liq. cast iron. The time for homogenisation and adjustment to the desired compsn. can be reduced, while the proportion of molten cast iron used is reduced and the scrap increased. Hence, the price of the steel can be lowered. Carbon contents of over 0.3% can be produced in the steel half way through the refining step.

Device for using the heat of flue gases in siemensmartin furnaces

Steel making process

Oven lining

Furnace lining consists of a number of groups of heat resistant blocks so formed and arranged that if the blocks are united above and in relation to each other, the horizontal and vertical joints between the blocks over the whole of the thickness of the lining between inner and outer surfaces have a rectangular bend, it prevents a straight passage of hot air or molten metal or glass.

Process for the production of steel or the like

Iron making process

Steel making process

Process for melting or refining metals as well as devices for carrying out the present process or similar process

Steel fabrication process in the siemens-martin furnace

Process for obtaining high percentage iron and titanium alloys

New process for smelting and refining steel in the martin siemens furnace

Basic steel manufacturing process and industrial products thus obtained

Starting a smelting process

A method of starting a molten bath-based process for smelting a metalliferous material is disclosed. The method includes using the heat flux of water-cooled elements in lower parts of a smelting vessel to provide an indication of molten bath temperature during at least an early part of the start-up method and adjusting injection rates of oxygen-containing gas and/or carbonaceous material into the smelting vessel to control the molten bath temperature during start-up without exceeding critical heat flux levels and tripping the start-up method.

Nozzle assembly for a metallurgical furnace

A nozzle assembly constituting a burner or blowing nozzle includes, in the region of the discharge opening thereof, a piston-like member which is displaceable by an actuating means into a position of blocking off the discharge opening thereby to prevent same from becoming clogged by slag or metal splashed thereon. When the assembly is mounted in the wall of a metallurgical furnace, the piston-like member may also be adapted to close off the opening in the wall, which communicates with the nozzle assembly, in order also to keep the wall opening open. At least a part of the piston-like member may be caused to oscillate or at least the part thereof which is towards the interior of the furnace may comprise or be coated with a scale-resistant material or may be coated with a material that is difficult to wet.

sonic injection furnace

a invenção se refere a um forno de loop com baixa nox para a fusão de vidro munido de um queimador aéreo que compreende um conduto de admissão de comburente que compreende 15 a 30 % de oxigênio em sua parede a montante, um conduto de recepção das fumaças de combustão em sua parede a montante, e um sistema de injeção sônica que compreende pelo menos um injetor de um jato de um gás com velocidade pelo menos igual a 80 % da velocidade sônica, dito injetor sônico, que desemboca na parede a montante ou que desemboca no conduto de recepção das fumaças de combustão, o dito injetor sônico injetando seu gás em contracorrente ao fluxo das fumaças de combustão que se dirige para o conduto de recepção das fumaças de combustão, assim como a um processo de preparação de vidro fundido que compreende a fusão de vidro no dito forno. The invention relates to a low nox glass melting loop furnace with an overhead burner comprising a oxidizer inlet conduit comprising 15 to 30% oxygen in its upstream wall, a smoke receiving conduit combustion in its upstream wall, and a sonic injection system comprising at least one gas jet injector with a velocity at least 80% of the sonic velocity, said sonic injector, which flows into the upstream wall or which flows into the combustion fume receiving duct, said sonic injector injecting its gas against the flow of combustion fumes going into the combustion fumes receiving duct, as well as to a molten glass preparation process comprising melting glass in said oven.

Process to refine cast iron

Patent BE473171A

Method and device for removing the slag contained in the slag chambers of martin furnaces or similar furnaces

Improvements relating to smelting furnace assemblies and the method of operating them

<PICT:1071352/C6-C7/1> The flue gases from a melting furnace, heated by the combustion of fuel in technically pure oxygen, are passed to a tank or tanks to preheat the raw material for the next charge, contained therein. The fuel together with an insufficient quantity of a 95% oxygen composition for complete combustion is fed via burner 2 to tiltable furnace 1, the exhaust gases produced passing through a Y' branched, refractory lined open ended flue 3 into tapered tubular tanks 4, having an inlet to outlet area ratio of between 5 to 1 and 2 to 1 to preheat the raw material for the next charge. Additional preheated oxygen-enriched air is provided before the tanks 4 to complete combustion of the fuel. On completion of the melting of the charge, burner 2 and flue 3, now covered by end covers 11 to prevent cooling, are withdrawn, the furnace 1 tapped and the preheated burden skip charged from the tanks 4 by crane lifts 12, 13 to the furnace. Burner 2 and flue 3 are then replaced and a new tank 4 containing a fresh charge to be preheated inserted between flue 3 and abutment 17 leading to the exhaust system through bellows 18 which take up any expansion. During the tapping and charging the Y flue 3 may be repaired by spraying. In a second embodiment Fig.4 (not shown) a furnace fitted with a swivelable cover plate which may be removed as well as the burner and flue, or a cover plate secured to the flue to be removed with it to facilitate charging is disclosed. In this latter case the furnace may be mounted on wheels. A pressure gauge is mounted in the flue 3, the signal from which is used to control the induced draught to within \sB3 mins w.g. of a desired value.

Method of smelting low-alloy vanadium containing steel

FIELD: metallurgy. SUBSTANCE: in the charge, naturally-alloyed vanadium-containing cast iron of batch production is used, and after the melting slag has been loaded, the carbon oxidation is carried out with non-fluxed vanadium-containing pellets serially produced from titanomagnetite raw materials, after which the vanadium is reduced from slags of oxidation periods and "pure" boiling by introducing ferrosilicon in the period of preliminary deoxidation of metal from the calculation of 2-3 kg of silicon per ton of the spent pellets. EFFECT: invention allows to reduce the cost of alloying vanadium steel, to improve the processability of melting and the quality of the metal due to the low sulfur content of vanadium-containing cast iron and vanadium-containing pellets, which practically excludes additional techniques for desulfurizing the metal, while a much lower content of coloured impurities provides additional increasing the quality characteristics of vanadium-containing steels for castings. 4 cl, 3 ex РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 626 110 C1 (51) МПК C21C 5/04 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ФОРМУЛА (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ 2016102102, 22.01.2016 (24) Дата начала отсчета срока действия патента: 22.01.2016 Дата регистрации: Приоритет(ы): (22) Дата подачи заявки: 22.01.2016 (45) Опубликовано: 21.07.2017 Бюл. № 21 2 6 2 6 1 1 0 C 1 (56) Список документов, цитированных в отчете о поиске: SU 1420030 A1, 30.08.1988. RU 2044060 C1, 20.09.1995. RU 2309181 C1, 27.10.2007. GB 369258 A, 15.03.1932. US 4526613 A, 02.07.1985. (54) Способ выплавки низколегированной ванадийсодержащей стали (57) Формула изобретения 1. Способ выплавки низколегированной ванадийсодержащей стали для отливок в основной мартеновской печи скрап-процессом, включающий завалку в печь шихты, включающей чугунную составляющую, стальной лом, флюсующие материалы, плавление шихты, скачивание шлака плавления, окислительный ...

PROCEDURE AND DEVICE FOR THE PROTECTION OF DOORS AND REFRACTORY FITTINGS OF A CUVE

Sonic injection furnace

A low-NOx end-fired furnace for melting glass equipped with an overhead burner includes an inlet duct for oxidizer, including 15% to 30% of oxygen, in its upstream wall, a duct for receiving the combustion flue gases in its upstream wall, and a sonic injection system including at least one injector for injecting a jet of a gas at a speed at least equal to 80% of the speed of sound, referred to as a sonic injector, opening into the upstream wall or opening into the duct for receiving the combustion flue gases, the sonic injector injecting its gas counter-current to the stream of the combustion flue gases that are heading toward the duct for receiving the combustion flue gases.

Advanced steelmaking process

Wire injection lance nozzle insert

A lance nozzle insert for a refractory lance for feeding an additive wire into a quantity of molten metal below the surface of the molten metal surface is made of a material comprising stabilized zirconium oxide and graphite substantially increasing the corrosion resistance of the lance nozzle insert.

Process of melting scrap or another solid metallic charge

Apparatus for processing molten metal

Process and apparatus for protecting the tuyeres and the lining of a vessel for refining molten metal

To protect the nozzles and the refractory lining of a container for the upgrading treatment of liquid metal, a blowing device is used comprising at least three concentric pipes (11, 12, 13) forming annular channels (18, 19) through which a protection fluid is blown in. This fluid is formed by a hydroxyl compound, particularly a mixture of alcohol and water, which is atomized by means of a carrier gas, before entering the respective annular channel or within the latter.

Open hearth charging ore

Heating process and apparatus using oxygen

A method of high energy release for surface heating a charge. The surface of the charge is provided by reacting a reactive material in or above the charge and simultaneously a streamline blanket of oxidizing gas is continuously directed from near a margin of the charge parallel to and hugging its surface. The reaction may take the form of a flame directed onto the charge, from above, through a burner. Alternatively, the charge may be a mixture of combustible and non-combustible material in which case the flame may be developed on the surface of the charge. Apparatus for surface heating includes a containing vessel for receiving a charge of material. An elongated manifold adjacent a margin of the vessel and extending a substantial distance across it not far from the surface of the charge provides means for directing a blanket of oxidizing gas substantially parallel to the surface of the charge. This may include spaced apart nozzles aimed parallel to the surface of the charge. The apparatus may also include at least one fuel injector above the manifold to provide a flame directed over the surface of the charge above the oxidizing gas.

Starting a smelting process

금속 함유 물질을 제련하기 위한 용탕 기반 공정을 시동하는 방법이 개시된다. 상기 방법은 제련 용기 하부의 수냉식 구성 요소들의 열 유속을 이용하여 시동 방법의 적어도 초기 동안 용탕 온도의 표시를 제공하는 단계, 및 제련 용기 내로의 산소 함유 가스 및/또는 탄소계 물질의 주입 속도를 조절하여 임계 열 유속 수준의 초과 및 시동 방법의 비상정지 없이 시동 동안 용탕 온도를 제어하는 단계를 포함한다. A method of starting a molten metal based process for smelting metal containing materials is disclosed. The method utilizes the heat flux of the water-cooled components underneath the smelting vessel to provide an indication of the melt temperature during at least the initial stage of the start-up method, and to regulate the rate of injection of oxygen-containing gas and / or carbon-based material into the smelting vessel. And controlling the melt temperature during start-up without exceeding the critical heat flux level and emergency stop of the start-up method.

Starting a smelting process

A method of starting a molten bath-based process for smelting a metalliferous material is disclosed. The method includes using the heat flux of water-cooled elements in lower parts of a smelting vessel to provide an indication of molten bath temperature during at least an early part of the start-up method and adjusting injection rates of oxygen-containing gas and/or carbonaceous material into the smelting vessel to control the molten bath temperature during start-up without exceeding critical heat flux levels and tripping the start-up method.

SONIC INJECTION OVEN

L'invention concerne un four à boucle à bas NOx pour la fusion de verre muni d'un brûleur aérien comprenant un conduit d'arrivée de comburant comprenant 15 à 30% d'oxygène dans sa paroi amont un conduit de réception des fumées de combustion dans sa paroi amont, et un système d'injection sonique comprenant au moins un injecteur d'un jet d'un gaz à vitesse au moins égale à 80% de la vitesse sonique, dit injecteur sonique, débouchant dans la paroi amont ou débouchant dans le conduit de réception des fumées de combustion, ledit injecteur sonique injectant son gaz à contre-courant du flux des fumées de combustion se dirigeant vers le conduit de réception des fumées de combustion, ainsi qu'un procédé de préparation de verre fondu comprenant la fusion de verre dans ledit four. The invention relates to a low NOx loop furnace for melting glass provided with an overhead burner comprising an oxidizer inlet duct comprising 15 to 30% oxygen in its upstream wall, a flue gas receiving duct. in its upstream wall, and a sonic injection system comprising at least one injector of a jet of a gas at a speed at least equal to 80% of the sonic velocity, said sonic injector, opening into the upstream wall or opening into the flue gas reception duct, said sonic injector injecting its gas countercurrently with the stream of flue gases directed towards the flue gas reception duct, as well as a process for the preparation of molten glass comprising the smelting of glass in said oven.

Desulfurization and decarburization of iron and iron alloys

Process for the production of steel in the hearth furnace, from liquid phosphorous iron

Process for melting and / or refining metals.

Smelting furnace for the production of steel

Method of melting solid charges in open hearth furnace

Open hearth utilization

Starting a smelting process

Iron making process

Nerton dyer

Method of making steel

533,911. Open-hearth furnaces. TRIGGS, W. W. (Emulsions Process Corporation). July 6, 1939. No. 19681. [A Specification was laid open to inspection under Sect. 91 of the Acts, April 29, 1940]. [Class 51 (i)] [Also in Group II] Molten high carbon iron is converted to steel by injecting on to the top of a pool of the iron 'an atomized stream of water in the presence of an atomized fuel so as to cause a turbulence of the upper portion of the pool while forming ferric oxide and reducing the carbon, undue chilling of the iron being prevented by bringing fuel in close to the point at which the stream contacts with the pool. The process may be carried out in an open hearth furnace, and the water and fuel are fused in the form of an emulsion in which the water content is over 5 per cent. and up to 35 per cent. In carrying out the process scrap steel is first melted with or without lime, cold iron introduced and melted or molten pig iron added before the emulsion is introduced. Alternatively the hearth of the furnace may be lined with ferric scrap metal and a slag-producing agent, and then a charge of hot iron is poured in prior to the introduction of the emulsion. The charge 35 to be treated is contained in the hearth 35 of a furnace which is heated by burners 39 through which are also introduced the jets of atomized fuel oil and water with or without or the emulsion of water and oil alternating through the openings in the opposite ends of the furnace. When using the emulsion, the latter is fed to the burners from an emulsifying mill by valved pipes 40 and steam is fed into the mixing chambers of the burners by pipes 42. Roof burners 44 extending through openings 49 in the roof of the furnace are also provided, and are supplied from the pipes 41, 42. The emulsifying mill used may be that described in U.S.A. Specification 2,059,535 and the proportioning pump which controls the proportions of oil and water supplied to the emulsifying mill may be that described in U.S.A. ...

Method of heating open-hearth furnaces

Improvements in steelmaking

Method and apparatus for manufacturing steel

Method and device for improving the efficiency of martin-siemens furnaces

Patent FR2324738B1

Metallurgical melting and refining installation

Metallurgisches Schmelz- und Frischaggregat (21) mit dem Schrott, Eisenschwamm, festes und flüssiges Roheisen in beliebigem Mischungsverhältnis verarbeitet und als Energiequelle Kohle, Öl, Gase oder elektrische Energie eingesetzt werden können. Zu diesem Zweck und im Hinblick auf niedrige Investitionskosten ist das Ofengefäß (22) in Form eines runden Herdofens ausgebildet mit einem Verhältnis der Innenabmessungen Durchmesser (d) zu Höhe (h) des Ofengefäßes zwischen 0,8 und 2,5 und es ist zu beiden Seiten des Abstichloches (10) jeweils eine Düsenbank (33) für erste Düsen (24) vorgesehen, die unterhalb des Schmelzspiegels münden. Ferner münden in das Ofengefäß oberhalb des Schmelzspiegels zweite Düsen (25), die als Brenner ausgebildet sind. Durch einen Schrottvorwärmer (27) dessen Boden aus gasdurchlässigen Rostteilen (30, 31) besteht, die sich von der Mitte aus öffnen lassen, läßt sich das Einsatzmaterial vorwärmen und gezielt chargieren. Metallurgical melting and fresh aggregate (21) with which scrap, sponge iron, solid and liquid pig iron can be processed in any mixing ratio and coal, oil, gases or electrical energy can be used as an energy source. For this purpose and in view of low investment costs, the furnace vessel (22) is designed in the form of a round hearth furnace with a ratio of the inside dimensions diameter (d) to height (h) of the furnace vessel between 0.8 and 2.5 and it is both On each side of the tap hole (10), a nozzle bank (33) is provided for first nozzles (24) which open below the melting level. Furthermore, second nozzles (25), which are designed as burners, open into the furnace vessel above the melting level. The feed material can be preheated and specifically charged by means of a scrap preheater (27) whose base consists of gas-permeable grate parts (30, 31) that can be opened from the center.

Process for the direct manufacture of steel and installation for the application of said process

Process for the preparation of steel in hearth furnaces

Process for the production of steel in siemens-martin furnaces and furnace installation for the implementation of this process

Improvements to the heating of martin ovens

Method of operating an open hearth furnace

Starting a smelting process

Improvements in Alloys and in the Manufacture thereof.

5015. Allison, C. A., [International Metal Products Co.]. Feb. 28. [Addition to 27,201/09.] Cast-iron and scrap processes; ore, oxide, castiron, and scrap processes.-The purification of iron by prolonged treatment in the basic openhearth furnace, as described in the parent Specification, is continued until the aggregate content of carbon, silicon, sulphur, phosphorus, and manganese does not exceed À10 per cent, and the oxygen content, after degasification, does not exceed À04 per cent.

Forehearth of reservoir for direct melting and reservoir for direct melting

A forehearth (5) for containing a volume of molten material and a direct smelting vessel (3) that includes the forehearth are disclosed. The forehearth includes a forehearth connection (15) for connecting the foreheath with a smelting chamber (4) of a smelting vessel (8) so that molten material can flow from the smelting chamber into the forehearth. The forehearth connection is formed so that there is an unrestricted line of sight through the forehearth connection from a location that is external to the forehearth. This makes it possible to unblock the forehearth connection by a mechanical drill or other equipment extending into the forehearth connection and operated externally of the forehearth.

Wire injection lance nozzle insert

A lance nozzle insert for a refractory lance for feeding an additive wire into a quantity of molten metal below the surface of the molten metal surface is made of a material comprising stabilized zirconium oxide and graphite substantially increasing the corrosion resistance of the lance nozzle insert.

Synthetic ore

Improvements in or relating to steel production

In a process for producing low-hydrogen steel in an electric furnace, finely divided lime for slag-forming is charged pneumatically into the furnace, the lime having been protected from moisture since its production. The lime is of a particle size less than 100m ; each addition should comprise not more than 20 mgm./sq. metre of bath surface, the proportion of carrier gas to lime being suitably 3-6 litres per mgm. Supply velocity should not exceed 100-200 mgm. lime per minute.

Forehearth mixing ladle

FIELD: metallurgy. SUBSTANCE: forehearth mixing ladle 5 comprises its joint element 15 for connection to smelting chamber 4 of smelting container 8. Forehearth mixing ladle connection is implemented so that there is an unlimited line of observation via said forehearth mixing ladle connection from position on the forehearth mixing ladle outer side. EFFECT: possibility to punch forehearth mixing ladle connection by drill or similar equipment controlled from its outer side. 18 cl, 7 dwg

Patent BE546861A

Patent JPS56501810A

Patent BE509667A

Patent BE373374A

Method and apparatus for supplying solids and oxygen in a martin type hearth furnace

Starting a smelting process

A method of starting a molten-bath based melting process includes establishing a sufficiently large and stable "hot zone" by inserting an external ignition source for ignition of oxygen and coal in a main chamber of a smelting vessel by independent means, i.e. independently of and before supplying cold oxygen and coal into the main chamber.

Process for protecting the tuyeres and the lining of a vessel for refining molten metal