REINFORCED DISTRIBUTOR FOR POST-COMBUSTION LANCE

A distributor for a post-combustion lance, comprising: an annular member, an inner reinforcing sleeve and an outer sleeve, wherein the annular member and the inner reinforcing sleeve may be made from different materials and the annular member and the outer sleeve each may be made from a first material. The annular member and the outer sleeve each may be made from a first material and the inner reinforcing sleeve may be made from a second material, a plurality of longitudinal ribs are spaced around an inner surface of the inner reinforcing sleeve and/or one or more of the plurality of longitudinal ribs is made of steel or other high strength material. Further, a plurality of longitudinal ribs may be spaced around an inner surface of the outer sleeve and may be made from steel or other high strength material. The annular member defines a plurality of openings that permit gas flow from within a gas passageway of the lance to flow through the annular member and outside of the lance and the inner reinforcing sleeve may define a plurality of first openings and the annular member may define a plurality of second openings, wherein each of the first and second openings are in fluid communication, directly or indirectly, with a first cooling fluid passageway of the lance. Further, each of the first openings is contiguous with and in direct fluid communication with one of the second openings Additionally, the annular member may define a plurality of third openings, wherein each of the third openings is in fluid communication with a second cooling fluid passageway of the lance. 1. A distributor for a post-combustion lance , comprising:an annular member, an inner reinforcing sleeve and an outer sleeve.2. The distributor for a post-combustion lance of wherein the annular member and the inner reinforcing sleeve are made from different materials.3. The distributor for a post-combustion lance of wherein the annular member and the outer sleeve are each made from a first material.4. ...

GAS INJECTION NOZZLE REFRACTORY AND GAS INJECTION NOZZLE

A gas injection nozzle refractory with one or more gas injection small metal tubes buried therein has improved durability. The gas injection nozzle refractory includes a MgO-C central refractory with a small metal tube buried therein, and a MgO-C peripheral refractory surrounding the central refractory. The central refractory on a plane of the gas injection nozzle refractory has an external shape of a circle with a radius in the range of R+10 to R+150 mm concentric with a virtual circle with a minimum radius surrounding all buried small metal tubes, R mm being a radius of the virtual circle. 1. A gas injection nozzle refractory with at least one gas injection small metal tube buried in a carbon-containing refractory , the gas injection nozzle comprising:a central refractory with the at least one small metal tube buried therein, the central refractory being a MgO-C refractory with a carbon content in the range of 40% to 80% by mass, a metal Al content in the range of 3% to 8% by mass, and a mass ratio of a metal Si content to the metal Al content in the range of 0.30 to 1.0, anda peripheral refractory surrounding the central refractory, the peripheral refractory being a MgO-C refractory with a carbon content in the range of 10% to 25% by mass,wherein the central refractory on a plane of the gas injection nozzle refractory has an external shape of a circle with a radius in the range of R+10 to R+150 mm concentric with a virtual circle with a minimum radius surrounding the at least one buried small metal tube, R mm being a radius of the virtual circle.2. The gas injection nozzle refractory according to claim 1 , wherein the external shape is a circle with a radius in the range of R+40 to R+70 mm concentric with the virtual circle.3. The gas injection nozzle refractory according to claim 1 , wherein the metal Al content is in the range of 5% to 7% by mass.4. The gas injection nozzle refractory according to claim 1 , wherein the metal Al content is in the range of 5% to ...

Tuyere for a basic oxygen furnace

A tuyere comprising an inner tube including a lower section having a first diameter, an upper section having a second diameter smaller than the first diameter, and a converging transition section having a converging angle Θ from 15° to 35° connecting the lower section to the upper section, the inner tube terminating in an inner nozzle at a downstream end of the upper section; and an outer tube surrounding the inner tube so as to create an annulus there between, the outer tube including a lower section having a third diameter larger than the first diameter, an upper section having a fourth diameter smaller than the third diameter but larger than the second diameter, and a converging transition section having connecting the lower section to the upper section, the outer tube terminating in an outer nozzle at a downstream end of the upper section.

METHOD FOR REFINING HOT METAL IN CONVERTER

A method for refining hot metal in a converter using a top-blowing lance having a refining powder supply channel, a combustion oxidizing gas supply channel, and a refining oxidizing gas supply channel that are separate from each other includes supplying at least one of a lime-based flux, iron oxide, and a combustible material as a refining powder from the refining powder supply channel to a surface of the hot metal using a fuel gas or a mixture of the fuel gas and an inert gas as a carrier gas while supplying a combustion oxidizing gas from the combustion oxidizing gas supply channel to form a flame below a leading end of the top-blowing lance, and supplying a refining oxidizing gas from the refining oxidizing gas supply channel to the surface of the hot metal. 1. A method for refining hot metal in a converter using a top-blowing lance having a refining powder supply channel , a combustion oxidizing gas supply channel , and a refining oxidizing gas supply channel that are separate from each other , the method comprising supplying at least one of a lime-based flux , iron oxide , and a combustible material from the refining powder supply channel to a surface of the hot metal in the converter using a fuel gas or a mixture of the fuel gas and an inert gas as a carrier gas while supplying a combustion oxidizing gas from the combustion oxidizing gas supply channel to form a flame with the combustion oxidizing gas and the fuel gas below a leading end of the top-blowing lance , and supplying a refining oxidizing gas from the refining oxidizing gas supply channel to the surface of the hot metal in the converter.2. The method for refining hot metal in a converter according to claim 1 , wherein the volume fraction of the fuel gas in the carrier gas is 10% or more.3. The method for refining hot metal in a converter according to claim 1 , wherein the flow rate of the combustion oxidizing gas supplied from the combustion oxidizing gas supply channel is adjusted depending on the ...

METHOD OF DETECTING SLAG IN MOLTEN STEEL FLOW

A method of detecting slag in a molten steel flow includes an image capturing step of sequentially capturing a molten steel flow which is directed from a converter toward a ladle and includes molten steel and slag to acquire a plurality of captured images of the molten steel flow, a histogram creation step of creating a histogram for each captured image, a maximum peak point detection step of detecting a maximum peak point, in which the number of pixels is an absolute maximum value, for each histogram, and a maximum peak point type determination step of determining to which of the slag or the molten steel the maximum peak point of each histogram corresponds. 1. A method of detecting slag in a molten steel flow , comprising:an image capturing step of sequentially capturing a molten steel flow which is directed from a converter toward a ladle and includes molten steel and slag to acquire a plurality of captured images of the molten steel flow;a histogram creation step of creating a histogram, in which a density parameter corresponding to a density of each pixel constituting each captured image is shown on a horizontal axis and the number of pixels that is a total number of pixels each having the density parameter is shown on a vertical axis, for each captured image;a maximum peak point detection step of detecting a maximum peak point, in which the number of pixels is an absolute maximum value, for each histogram; anda maximum peak point type determination step of determining to which of the slag or the molten steel the maximum peak point of each histogram corresponds,{'sub': 'n', 'wherein when a maximum peak point Pof a histogram of an nth (n≥2) captured image is determined in the maximum peak point type determination step,'}{'sub': n', 'n', 'n-1', 'n-1', 'n, 'in a case where a variation ΔT of a density parameter Tat the maximum peak point Pwith respect to a density parameter Tat a maximum peak point Pin a histogram of an n−1th captured image is equal to or more than ...

METALLURGICAL FURNACE HAVING AN INTEGRATED OFF-GAS HOOD

An apparatus is disclosed for a metallurgical furnace having a roof with an integrated off-gas hood. The roof has a hollow metal roof section. The hollow metal roof section has a top and a bottom surface. The hollow metal roof section has a center opening configured for one or more electrodes to pass therethrough. An enclosed space is disposed between the top and the bottom surface. A spray-cooled system is disposed in the enclosed space and configured to spray-coolant on the bottom surface of the roof. The integrated off-gas hood has an inlet open to the center opening. The spray-cooled system is also configured to cool the integrated off-gas hood. 1. A spray-cooled roof for a ladle metallurgical furnace , the spray-cooled roof comprising: a top surface and a bottom surface;', 'an opening configured for one or more electrodes to pass therethrough;', 'an enclosed space disposed between the top and the bottom surface; and', 'a spray-cooled system disposed in the enclosed space and configured to spray-coolant on the bottom surface of the roof;, 'a hollow metal roof section, the hollow metal roof section comprisingan integrated off-gas hood has an inlet open to the opening in the hollow metal roof section2. The spray-cooled roof of wherein the spray-cooled system is also configured to cool the integrated off-gas hood.3. The spray-cooled roof of wherein the opening further comprises:a sidewall, wherein the inlet is disposed on the sidewall of the opening.4. The spray-cooled roof of further comprising:a channel fluidly coupled to the inletan outlet fluidly coupled to the channel opposite the inlet.5. The spray-cooled roof of wherein the channel has a step therein such that the inlet is vertically further from a plane of the top surface than the outlet.6. The spray-cooled roof of wherein the top surface is flat at or near the opening.7. The spray-cooled roof of further comprising:a door operable between an open position and a closed position wherein the door in the closed ...

METHOD FOR IMPROVING THE REDUCTION DEGREE IN THE SMELTING OF FERROALLOY

The invention relates to a method for improving the reduction degree of metal components in a chromite concentrate when smelting ferroalloy suitable for manufacturing of stainless steel. The chromite concentrate is fed together with nickel-containing raw material so that by means the amount of nickel-containing raw material it is achieved a desired reduction degree for the metal components of ferroalloy. 1. Method for improving the reduction degree of metal components in a chromite concentrate when smelting ferroalloy suitable for manufacturing of stainless steel , characterized in that the chromite concentrate is fed together with nickel-containing raw material so that by means the amount of nickel-containing raw material it is achieved a desired reduction degree for the metal components of ferroalloy.2. Method according to the claim 1 , characterized in that the nickel-containing raw material is fed 5-25 weight % claim 1 , advantageously 10-20 weight % of the total amount of the material to be fed into the smelting furnace.3. Method according to claim 1 , characterized in that during the smelting it is reduced at least 2.6% of chromium containing in the chromite concentrate.4. Method according to claim 1 , characterized in that during the smelting it is reduced at least 37.4% of iron containing in the chromite concentrate.5. Method according to claim 1 , characterized in that at least one part of the nickel-containing raw material is fed into the smelting furnace within pellets produced from the chromite concentrate.6. Method according to claim 1 , characterized in that at least one part of the nickel-containing raw material is pretreated separately from the chrome concentrate pellets before feeding into the smelting furnace.7. Method according to claim 1 , characterized in that it is fed into the smelting furnace as the nickel-containing raw material at least partly nickel oxide.8. Method according to claim 1 , characterized in that it is fed into the smelting ...

Metallurgical furnace having an integrated off-gas hood

An apparatus is disclosed for a metallurgical furnace having a roof with an integrated off-gas hood. The roof has a hollow metal roof. The hollow metal roof has a top, a bottom, an outer sidewall and an inner sidewall. An opening extends from the top to the bottom and is defined by the inner sidewall. The opening is configured for one or more electrodes to pass therethrough. An enclosed space is defined between the top, the bottom, the inner sidewall and the outer sidewall. A spray-cooled system is disposed in the enclosed space and configured to spray coolant in the enclosed space on the bottom surface of the hollow metal roof. A channel having walls is disposed through the enclosed space, wherein the spray-cooled system extends between the top of the hollow metal roof and the wall of the channel.

ZINC-MODIFIED FERRITIC STAINLESS STEELS AND MANUFACTURING METHOD THEREOF

The present invention discloses zinc-modified ferritic stainless steels and a manufacturing method thereof. The chemical composition of the ferritic stainless steels comprises 14-16 wt % chromium, 0.001-4 wt % zinc, 0.001-0.02 wt % nitrogen, 0.003-0.015 wt % carbon and the remaining of weight percentage of the composition is iron. By adding zinc into the composition, the ferritic stainless steels of the present invention have stronger capacity of corrosion resistance and lower manufacturing cost, as compared to the conventional stainless steels. 1. A zinc-modified ferritic stainless steel , comprising:carbon being in a range of 0.003-0.015 weight percent;nitrogen being in a range of 0.001-0.02 weight percent;chromium being in a range of 14-16 weight percent;zinc being in a range of 0.001-4 weight percent; andrest of weight percentage of compositions being iron.2. A zinc-modified ferritic stainless steel , comprising:carbon being in a range of 0.003-0.015 weight percent;nitrogen being in a range of 0.001-0.02 weight percent;chromium being in a range of 14-16 weight percent;zinc being in a range of 0.001-4 weight percent;tin being in a range of 0.001-10 weight percent; andrest of weight percentage of compositions being iron.3. A zinc-modified ferritic stainless steel , comprising:carbon being in a range of 0.003-0.015 weight percent;nitrogen being in a range of 0.001-0.02 weight percent;chromium being in a range of 14-16 weight percent;zinc being in a range of 0.001-4 weight percent;tin being in a range of 0.001-10 weight percent;copper being in a range of 0.001-0.05 weight percent; andrest of weight percentage of compositions being iron.4. A manufacturing method of zinc-modified ferritic stainless steels claim 1 , which is used to produce any kind of the zinc-modified ferritic stainless steels described in claim 1 , comprising the following steps of:providing a test piece and proceeding a cold briquetting process;putting the test piece into a mould after proceeding ...

METHOD TO CONTROL SLAG FOAMING IN A SMELTING PROCESS

A method to control slag foaming in a smelting process in a vessel for smelting an iron-containing feed material including the steps of: 1. A method to control slag foaming in a smelting process in a vessel for smelting an iron-containing feed material comprising the steps of:measuring vibration of the metallurgical vessel with an accelerometer at one or more positions on the vessel to obtain accelerometer data,comparing values derived from the accelerometer data with a threshold value which indicates the onset of a slag foaming incident, andadjusting the smelting process if the value derived from the accelerometer data passes a predefined alarm value,wherein the smelting process is adjusted by adjusting the amounts of the gaseous and/or the solid components injected in the smelting process.2. The method according to claim 1 , wherein said adjusting the smelting process comprises adjusting the amount of oxygen injected in the smelting process.3. The method according to claim 1 , wherein said adjusting step comprises adjusting the amount of coal injected in the smelting process.4. The method according to claim 1 , wherein said adjusting step comprises adjusting the amount of iron-containing feed material injected in the smelting process.5. The method according to claim 1 , wherein said adjusting step comprises adjusting the amount of lime injected in the smelting process.6. The method according to claim 1 , wherein the basicity of the slag is monitored and the amount of lime injected in the smelting process is adjusted to keep the basicity of the slag in a predefined range or restore the basicity of the slag to within the predefined range.7. The method according to claim 2 , wherein the adjusting step comprises adjusting the amounts of gaseous and solid components by reducing the amounts of gaseous and solid components when the value derived from the accelerometer data is in the alarm range.8. The method according to claim 7 , wherein the method further comprises ...

Lance and method for determining reaction data of the course of a reaction

A lance and a method determine reaction data of the course of a reaction, in which a reaction gas is top-blown by at least one lance onto a metallic melt in a metallurgical vessel and measured data are determined in this way, reaction data for the course of the reaction are determined as a function of these, where the lance for determining measured data blows out a gas which is conveyed separately from the reaction gas through at least one outlet opening of at least one measuring conduit. The lance for determining measured data blows out the gas which is conveyed separately from the reaction gas laterally through at least one outlet opening of at least one measuring conduit and the internal pressure of at least one gas bubble of this gas formed at this outlet opening of the respective measuring conduit is measured.

Method for Recycling-Processing of Dust Generated in Converter Furnace, and Method for Manufacturing Steel

A method for recycling processing of dust generated in a converter furnace, includes: crushing and drying a cake formed by adding a binder to a slurry containing iron powder-containing dust that is generated at the time of converter blowing and wet-collected to produce a mixed slurry and subjecting the produced mixed slurry to a dehydration treatment in a filter press; accumulating the cake in an accumulation tank; and charging the cake into a converter furnace 10, the crushed product in the accumulation tank 25 is kept at a temperature of less than 90° C. by forcibly passing air into the accumulation tank 25 and charged into a converter furnace according to the converter operation.

CONVERTER SLAGGING MONITORING METHOD AND SYSTEM

A converter slagging monitoring method and device. The method comprises: acquiring converter smelting data containing converter noise data and oxygen lance vibration data in real time; based on a pre-established slagging monitoring model, calculating the thickness of slags in a converter molten bath by virtue of the acquired converter smelting data; comparing the calculated thickness of slags with a splashing threshold value and a drying threshold value which are contained in the slagging monitoring model, judging whether a comparison result characterizes the occurrence of splashing or drying, and when the comparison result characterizes the occurrence of splashing or drying, acquiring corresponding splashing information or drying information; and finally, according to the splashing information or drying information, making a corresponding splashing control scheme or drying control scheme to guide a subsequent slagging operation so as to achieve the smooth control of the lance position. 1. A method for monitoring converter slagging , comprising:acquiring converter smelting data in a real time manner, wherein the converter smelting data comprises slagging noise data and oxygen lance vibration data;calculating slag thickness of a converter molten bath from the slagging noise data and the oxygen lance vibration data based on a pre-established converter slagging monitoring model, wherein the converter slagging monitoring model comprises an association relationship between the slag thickness of the converter molten bath, a slagging noise sound intensity feature and an oxygen lance vibration feature, and the converter slagging monitoring model further comprises a splashing threshold value and a drying threshold value as evaluation references for the slag thickness;comparing the calculated slag thickness with the splashing threshold value and the drying threshold value to obtain a comparison result;determining whether the comparison result indicates that splashing or ...

METHOD FOR ELUTING CALCIUM FROM STEEL SLAG AND METHOD FOR RECOVERING CALCIUM FROM STEEL SLAG

The purpose of the present invention is to provide a method for eluting calcium from steel slag such that more calcium can be eluted into an aqueous solution containing carbon dioxide from the steel slag. The present invention comprises carrying out, in the following order, a step of subjecting a calcium compound contained in the steel slag to hydration and a step of bringing the steel slag subjected to the hydration into contact with the aqueous solution containing carbon dioxide. Furthermore, in the present invention, the aqueous solution containing carbon dioxide is brought into contact with the steel slag while the steel slag is being pulverized or the surface of the steel slag is being ground. As a result of these methods, more calcium can be easily eluted into the aqueous solution containing carbon dioxide from the steel slag. 1. A method for eluting calcium from steelmaking slag , the method comprising:subjecting the steelmaking slag to hydration treatment;wherein, in the hydration treatment, the steelmaking slag is immersed in water containing 300 mg/l of carbon dioxide or less and left to stand, or water and the steelmaking slag are mixed and kneaded into a paste, followed by leaving the paste to stand; andbringing the steelmaking slag that has been subjected to the hydration treatment into contact with an aqueous solution containing carbon dioxide.2. (canceled)3. (canceled)4. (canceled)5. (canceled)6. (canceled)7. The method according to claim 1 , wherein claim 1 , in the bringing the steelmaking slag into contact with the aqueous solution containing carbon dioxide claim 1 , the steelmaking slag in contact with the aqueous solution containing carbon dioxide is fractured or pulverized claim 1 , or a surface of the steelmaking slag in contact with the aqueous solution containing carbon dioxide is ground.8. A method for eluting calcium from steelmaking slag claim 1 , the method comprising:bringing the steelmaking slag into contact with an aqueous solution ...

TILTING MECHANISM FOR A VESSEL

The invention relates to a tilting mechanism for a tilting metallurgical vessel, in particular a converter, around a horizontal axis, comprising a rotatable shaft and at least one tilting drive mechanism for rotating the vessel about the axis, the at least one tilting drive mechanism has a fixed part and a moving part, wherein the moving part of the at least one tilting drive mechanism is directly connected to one end of the rotatable shaft. 1. Tilting mechanism for a tilting metallurgical vessel , in particular a converter , around a fixed horizontal axis , comprising two trunnions centered on the horizontal axis and at least one tilting drive mechanism for rotating the vessel about the axis , the at least one tilting drive mechanism has a fixed part and a moving part wherein the moving part of the at least one tilting drive mechanism is directly connected to one end of one of the two trunnions and wherein the tilting drive mechanism is a motor and does not include any gears.2. A tilting mechanism according to claim 1 , wherein the tilting drive mechanism is a hydraulic motor.3. A tilting mechanism according to claim 1 , comprising a trunnion ring arranged to carry the vessel and two trunnions connected to the trunnion ring wherein the trunnions extends opposite sides of the the trunnion ring and along the horizontal axis claim 1 , and wherein the trunnions are journaled in bearings means which are in turn supported on fixed supports claim 1 , optionally the tilting mechanism further includes a breaking assembly.4. A tilting mechanism according to claim 1 , wherein there is provided two tilting means arranged at either side of the vessel directly connected to the two trunnions.5. A tilting mechanism according to claim 2 , wherein a hydraulic system is provided for feeding the hydraulic motor claim 2 , the hydraulic system comprises an adjustable pump claim 2 , a flow control unit and a shut-off valve interposed between the pump and the control unit.6. A tilting ...

CONVERTER

A converter for the production of steel by a blowing process from a substantially liquid raw material, in particular pig iron, includes several injectors which are dispersed in the sidewall of the converter about the converter inner circumference and directed towards the bath level for refining the pig iron. The injectors are designed as supersonic nozzle, which are surrounded by a ring nozzle forming an enveloping gas jet. The injectors are oriented at an angle of max. 43° in relation to the bath surface, with oxygen being introduced through the supersonic nozzle and a mixture of compressed air and natural gas being introduced through the ring nozzle. The jet pulse for the oxygen jet fed through the supersonic nozzle is dimensioned such that an infiltration of the oxygen jet into the melt bath is ensured. 16.-. (canceled)7. A converter for the production of steel by a blowing process from a substantially liquid raw material , said converter comprising:a vessel having a sidewall;a plurality of injectors dispersed in the sidewall about an inner circumference of the vessel and directed towards a bath level of a melt bath for refining the raw material, said injectors being embodied as supersonic Laval nozzle and oriented at an angle of max. 43° in relation to a bath surface for introducing an oxygen jet of oxygen into an interior of the vessel at supersonic speed which is greater than 1.5× the sound of speed, with a jet pulse for the oxygen jet fed through the supersonic nozzle being dimensioned such that an infiltration of the oxygen jet into the melt bath is ensured; anda ring nozzle surrounding the injectors and forming an enveloping gas jet, said ring nozzle being constructed to introduce a mixture of compressed air and natural gas into the interior of the vessel.8. The converter of claim 7 , wherein the raw material is pig iron.9. The converter of claim 7 , wherein the injectors are configured for a switching over to a burner mode with long flame and an injector ...

PURGE PLUG

A refractory device, such as a replacement purge plug containing a refractory material, is configured to be inserted in the bottom of a ladle for introducing purging gas through a heat of molten metal in a ladle. One or more geometrical features on the lateral surface of the purge plug facilitate the installation of the purge plug into a housing block that has been subjected to erosion. 119-. (canceled)20. A refractory device comprising a supply end , a working end , and a lateral surface joining the supply end and the working end , wherein the lateral surface comprises an anchoring geometric feature protruding from or indented into the lateral surface , and wherein the device is tapered from the supply end to the working end.21. The refractory device of claim 20 , wherein the refractory device comprises a purge plug.22. The purge plug of claim 21 , wherein the purge plug has a shape selected from the group consisting of a truncated cone and a truncated pyramid.23. The purge plug of claim 21 , wherein the anchoring geometric feature is located proximal to the working end of the refractory device.24. The purge plug of claim 21 , further comprising an inlet in communication with the supply end of the plug.25. The purge plug of claim 21 , wherein the inlet is in fluid communication with the working end.26. The purge plug of claim 25 , wherein a structure providing fluid communication is selected from the group consisting of porosity and channels.27. The purge plug of claim 21 , further comprising a housing enclosing the lateral surface of the purge plug.28. The purge plug of claim 21 , wherein the geometric feature comprises at least one protrusion.29. The purge plug of claim 21 , wherein the geometric feature comprises at least one indentation.30. The purge plug of claim 21 , wherein the geometric feature comprises at least one rigid anchor.31. The purge plug of claim 21 , wherein the geometric feature comprises at least one flexible anchor.32. The purge plug of claim ...

METHOD FOR MONITORING A STEELMAKING PROCESS AND ASSOCIATED COMPUTER PROGRAM

A monitoring method of a steelmaking process in a steelmaking vessel, wherein matters Mn, each having its respective properties PMn, are charged into said steelmaking vessel so as to produce a liquid steel and a slag. 121-. (canceled)22. A method of a steelmaking process in a steelmaking vessel , wherein matters M , each having respective properties P , are charged into the steelmaking vessel so as to produce a liquid steel and a slag , the method comprising the steps of:{'sub': 'Y', 'a. defining at least one set of target characteristics TCSof the liquid steel to be produced;'}{'sub': X', 'X, 'b. defining at least two slag targets ST, each of the slag targets STcomprising values representative of slag properties of the slag,'}{'sub': X', 'YX', 'Y', 'Mn', 'YX', 'YX', 'n', 'n, 'c. calculating, for each slag target ST, a matter amount AMto be charged into the steelmaking vessel allowing to reach the at least one defined set of target characteristics TCS, taking into account respective properties of each matter P, the matter amount AMcomprising the individual amount aMof each matter Mto be charged, and'}{'sub': 'YX', 'd. selecting the matter amount AM.'}23. The method as recited in wherein coefficient n is superior or equal to 2.24. The method as recited in wherein the target characteristics TCSof the liquid steel to be produced or the at least two slag targets STare defined with a meshing method.25. The method as recited in wherein the meshing method does not have a constant pitch.26. The method as recited in wherein the target characteristics TCSincludes at least a liquid steel temperature at an end of the steelmaking process claim 22 , a liquid steel composition at the end of the steelmaking process or a liquid steel weight at the end of the steelmaking process.27. The method as recited in wherein each slag target STincludes at least a value representative of slag basicity claim 22 , an iron content in the slag or a manganese oxide content in the slag.28. The method ...

METHOD FOR PREDICTING SLOPPING IN CONVERTER, METHOD FOR OPERATING CONVERTER, AND SYSTEM FOR PREDICTING SLOPPING IN CONVERTER

A method and system for predicting slopping in a converter occurring during decarburization refining in the converter in which molten steel is produced from a molten pig iron by blowing oxidizing gas to the molten pig iron in the converter from a top blowing lance, or optionally further blowing oxidizing gas or inert gas from a bottom blowing tuyere to perform the decarburization refining of the molten pig iron. The method includes measuring an emission spectrum of a throat combustion flame blowing out from a throat of the converter, calculating emission intensity of the measured emission spectrum at a wavelength in a range of 580 to 620 nm, and predicting the occurrence of the slopping based on a time-series change of the calculated emission intensity. 1. A method for predicting slopping in a converter occurring during decarburization refining in the converter in which molten steel is produced from molten pig iron by blowing oxidizing gas to the molten pig iron in the converter from a top blowing lance , and optionally further blowing oxidizing gas or inert gas from a bottom blowing tuyere , to perform the decarburization refining of the molten pig iron , the method comprising:measuring an emission spectrum of a throat combustion flame blowing out from a throat of the converter;calculating emission intensity of the measured emission spectrum at a wavelength in a range of 580 to 620 nm; andpredicting occurrence of the slopping based on a time-series change of the emission intensity calculated.2. The method for predicting the slopping in the converter according to claim 1 , further comprising:detecting an inflection point at which the emission intensity increases again after a second reduction among a plurality of reductions; andpredicting the occurrence of the slopping upon detection of the inflection point.3. The method for predicting the slopping in the converter according to claim 1 , wherein the time-series change of the emission intensity is determined using a ...

PGM CONVERTING PROCESS AND JACKETED ROTARY CONVERTER

PGM converting process and jacketed rotary converter. The process can include low- or no-flux converting; partial pre-oxidation of PGM collector alloy; using a refractory protectant in the converter; magnetic separation of slag; recycling part of the slag to the converter; smelting catalyst material in a primary furnace to produce the collector alloy; and/or smelting the converter slag in a secondary furnace with slag from the primary furnace. The converter can include an inclined converter pot mounted for rotation; a refractory lining; an opening in a top of the pot to introduce converter feed; a lance for injecting oxygen-containing gas into the alloy pool; a heat transfer jacket adjacent the refractory lining; and a coolant system to circulate a heat transfer medium through the jacket to remove heat from the alloy pool in thermal communication with the refractory lining. 1. A process for converting platinum group metal (PGM) collector alloy , comprising the steps of: (i) 100 parts by weight of a collector alloy comprising no less than 0.5 wt % PGM, no less than 40 wt % iron, and no less than 0.5 wt % nickel, based on the total weight of the collector alloy; and', '(ii) if an added flux material comprises 10 wt % or more of silica and 10 wt % or more of calcium oxide, magnesium oxide, or a combination of calcium oxide and magnesium oxide, by weight of the added flux material, less than 20 parts by weight of the added flux material;, '(a) introducing a converter feed into a pot of a converter holding a molten alloy pool, wherein the converter feed comprises(b) injecting oxygen-containing gas into the alloy pool to convert iron and one or more other oxidizable elements from the collector alloy to the corresponding oxides and enrich PGM in the alloy pool;(c) allowing a slag comprising the iron oxide to collect in a low-density layer above the alloy pool;(d) tapping the low-density layer to recover the slag from the converter; and(e) tapping the alloy pool to recover ...

BLOWING LANCE TIP

A blowing lance tip includes a central stirring gas-supply tube, an inner coolant-inlet tube ending, at one end thereof facing the bath, in a second front wall and having a central opening, an outer coolant-outlet tube, a heat exchange space, and a stirring gas-outlet pipe leading from each opening in the front wall, wherein the second front wall has, at the central opening, an edge which is curved in axial cross-section such that a height (H) is defined between a leading face of said edge and the third front wall, and such that, in the heat exchange space, a predetermined minimum height (H) is present on the side facing the central opening. 1. A blowing lance tip for bath stirring , comprising:a central tube configured for supplying stirring gas, closed at a bath end by a first front wall provided with at least two openings;an internal tube forming with the central tube a first annular cavity for the passage of a cooling liquid and ended at a bath end by a second front wall, having a central opening and one passage orifice per opening provided in said first front wall;an external tube forming with the internal tube a second annular cavity for the passage of the cooling liquid and closed at a bath end by a third front wall having one outlet orifice per opening provided in said first front wall and having an internal surface comprising a tapered central area which is directed towards said central opening and which has a curved enveloped surface in an axial section;a heat exchange space located between a) said second front wall and said third front wall and b) said central opening and said second annular cavity, and in which the cooling liquid flows; andan injector leaving each opening in said first front wall and extending to said corresponding outlet orifice passing through said corresponding passage orifice in a cooling liquid-tight manner,{'b': 3', '1', '1', '3, 'wherein said second front wall has an edge in an axial section at the central opening which is curved ...

METHOD FOR THE TREATMENT OF STEELWORK SLAG AND HYDRAULIC MINERAL BINDER

The invention relates to a method for processing steel slag to produce a hydraulic mineral binder with a high hardening potential and to recover iron. There is provision for this purpose to provide a feed product comprising steel slag with MnO. This feed product is further processed as a melt by introducing reducing agent into the melt. A lime saturation factor of between 90 and 110 is hereby to be achieved in the mineral melt portion. Subsequently the melt is cooled in a defined manner and elementary iron is mechanically separated from the solidified melt. The solidified melt is then supplied for use as hydraulic mineral binder. Furthermore the invention relates to a hydraulic mineral binder. 1. Method for processing steel slag to produce a hydraulic mineral binder with high hardening potential and to recover iron , comprising the steps:providing a feed product comprising steel slag with iron compounds, in particular in oxide form, and MnO, wherein the MnO may be contained in the steel slag,processing the feed product as melt,incorporating reducing agent into the melt to reduce the iron compounds in order to achieve a lime saturation factor in the mineral melt part of between 90 and 110, wherein the incorporation of the reducing agent is carried out in a non-oxidising atmosphere,defined cooling, wherein the melt solidifies in 15 minutes at the earliest,mechanical separation of elementary iron from the solidified melt, andsubsequent supply of the solidified melt with a reduced iron content for use as hydraulic mineral binder.2. Method according to claim 1 ,characterised in thatthe feed product has 0.1 to 10 wt. % of MnO.3. Method according to one of the or claim 1 ,characterised in that{'sub': 2', '3', '2, 'up to 5 wt. % of AlOand/or 30-50 wt. % of CaO and/or 10 to 20 wt. % of SiOare contained in the feed product.'}4. Method according to one of the to claim 1 ,characterised in thatthe melt has a temperature of approximately 1600° C. to approximately 1800° C. before ...

FLUXING AGENT, PROCESS OF ITS PRODUCTION, AGGLOMERATION MIXTURE AND USE OF SLUG FROM SECONDARY METALLURGY

The invention relates to fluxing agents for the agglomeration process based on slag from the secondary metallurgy, the use of these fluxing agents in the process of agglomeration in the manufacture of the agglomerate designed for the use as a metallic charge in blast furnaces and a process of production of fluxing agents based on slag from the secondary metallurgy or based on a mixture of slag from the secondary metallurgy with other materials. 1. A fluxing agent for agglomeration based on slags from the secondary metallurgy , characterized in that it contains remelted mixtures of oxides CaO , AlO , SiO , MgO , MnO , FeO and other compounds forming eutectics , the smelting temperature of which is lower than 1600° C. , and the total content of said oxides is higher than 75% by weight , wherein the content of CaO is higher than 40% by weight , and the content of sulphur is lower than 2.5% by weight , wherein at least 90% by weight of the fluxing agent shows the grain size under 100 mm and optimally under 10 mm.2. A fluxing agent for agglomeration based on slags from the secondary metallurgy according to claim 1 , characterized in that the fluxing agent further contains lime claim 1 , limestone claim 1 , dolomite claim 1 , dolomite limestone claim 1 , magnesite claim 1 , undersize coke claim 1 , waste materials of by-products of metallurgical or cement industry claim 1 , and the ratio of CaO/SiOand CaO/AlOof the resulting fluxing agent is higher than 1.25.3. A process of production of a fluxing agent for agglomeration based on slag from the secondary metallurgy claim 1 , characterized in that the slag from the secondary metallurgy is gradually cooled at a cooling rate up to 200 degrees Celsius per hour to a temperature below the solidification point claim 1 , when the slag disintegrates spontaneously and optionally the remaining part of the slag is adjusted to the granulometry such that at least 90 percent by weight of the resulting fluxing agent has the grain size ...

Metal making lance with infrared camera in lance head

An oxygen blowing lance comprising: a lance body including an oxygen conduit and cooling water inlet and outlet conduits surrounding said oxygen conduit; a lance head connected to said lance body and comprising a nozzle body, said nozzle body including a central strut having bore hole, a plurality of nozzles arranged about said central strut, and a plurality of cooling chambers arranged about said central strut, wherein said plurality of nozzles are in fluid communication with said oxygen conduit for discharging oxygen from said oxygen conduit onto a metal bath in a converter vessel, and wherein said plurality of cooling chambers are in fluid communication with said cooling water inlet and outlet conduits; a temperature probe or camera assembly, such as an optical or infrared camera assembly, received in said bore hole for monitoring the temperature of said lance head or molten heat in which the lance is inserted; signal lines connected to said temperature probe for conveying signals from said temperature probe whereby operation of said blowing lance is regulated in response to said signals; and a protective pipe pressurized with a gas disposed in the bore and surrounding said temperature probe assembly and the signal lines.

METHOD FOR OPERATING CONVERTER

When the decarburization refining of molten iron is performed by top-blowing oxygen gas from the top blowing lance, the oscillation of molten iron, a bubble burst, and spitting due to the bubble burst are suppressed. A refining method for a converter includes decarburizing molten iron in the converter with a top blowing lance having Laval nozzles disposed at the lower end thereof by blowing oxygen gas on the surface of the molten iron in the converter through the Laval nozzles, in which one or both of an oxygen feeding rate from the top blowing lance and lance height LH are adjusted in such a manner that an oxygen accumulation index S(F) is 40 or less. 2. The method for operating a converter according to claim 1 , wherein:an actual value of the oxygen accumulation index S(F) calculated from Formula (2) and an amount of unidentified oxygen are monitored during the blowing to determine the constant α,the amount of unidentified oxygen is defined by a difference between an amount of oxygen input and an amount of oxygen output,the amount of oxygen input is defined by a sum of: (i) an amount of the oxygen gas supplied from the top blowing lance and (ii) an amount of oxygen in an auxiliary raw material charged into the converter, and{'sub': 2', '2, 'the amount of oxygen output is defined by a sum of: (i) amounts of oxygen present as CO gas, COgas, and oxygen gas in an exhaust gas from the converter and (ii) an amount of oxygen consumed by a desiliconization reaction and present as SiOin the converter.'} This application relates to a method for operating a converter by blowing oxygen gas on hot metal through multiple Laval nozzles provided on a top blowing lance to produce molten steel from molten iron while preventing the spouting of the hot metal to the outside of the converter. The term “molten iron” used here refers to hot metal or molten steel. When hot metal and molten steel are clearly distinguishable from each other, “hot metal” or “molten steel” is used.In ...

Alloy refining methods

A method of decarburizing a molten alloy may generally comprise injecting a first gas comprising at least one of argon, carbon dioxide, and oxygen through a first fluid-conducting portion of a tuyere into the molten alloy below the surface of the molten alloy, and injecting a second gas comprising at least one of argon and carbon dioxide through a second fluid-conducting portion of the tuyere into the molten alloy below the surface of the molten alloy. The tuyere may comprise an inner portion concentrically aligned within an outer portion to define an annulus therebetween. The first gas may be injected through the inner portion, and the second gas may be injected through the annulus.

Gas purging element and associated gas feed line

The invention relates to a gas purging element at a metallurgical vessel as well as a corresponding gas supply pipe.

MOLTEN METAL COMPONENT ESTIMATION DEVICE, METHOD OF ESTIMATING MOLTEN METAL COMPONENT, AND METHOD OF MANUFACTURING MOLTEN METAL

A molten metal component estimation device including: an input device configured to receive measurement information about a refining facility including measurement results regarding an optical characteristic; a model database that stores model expressions and model parameters, regarding a blowing process reaction, including a model expression and model parameters representing a relation between the oxygen efficiency in decarburization and a carbon concentration in a molten metal in the refining facility; and a processor configured to: estimate component concentrations of the molten metal including the carbon concentration in the molten metal by using the measurement information, the model expressions and the model parameters; estimate the carbon concentration in the molten metal based on the measurement results; and determine the model expression and the model parameters to be used when estimating the component concentrations of the molten metal, based on the estimation result of the carbon concentration in the molten metal.

REFRACTORY CERAMIC GAS PURGING PLUG AND A PROCESS FOR MANUFACTURING SAID GAS PURGING PLUG

The invention relates to a refractory ceramic gas purging plug, with a gas inlet at a first end, the so-called cold end, a gas outlet at a second end, the so-called hot end, and a peripheral surface extending between first and second end. 110101010101014142010iopi,opp. Refractory ceramic gas purging plug with a gas inlet at a first end () , a gas outlet at a second end () and a peripheral surface () extending between first and second end () , which peripheral surface () being at least partially covered by a metal casing () , wherein said metal casing () features a refractory coating () , which extends at least partially along its peripheral surface ().220. Gas purging plug according to claim 1 , wherein the refractory coating () has a thickness<2.5 mm.320. Gas purging plug according to claim 1 , wherein the refractory coating () has a thickness<1.0 mm.420. Gas purging plug according to claim 1 , wherein the refractory coating () has a thickness<0.5 mm.520. Gas purging plug according to claim 1 , wherein refractory coating () is made of a material which reacts under temperatures above 800° C. with the material of the metal coating claim 1 , thereby forming a chemical compound with a melting temperature above 1 claim 1 ,300° C.620. Gas purging plug according to claim 1 , wherein the refractory coating () is made of a material which reacts under temperatures above 800° C. with the material of the metal coating claim 1 , thereby forming a spinel with a melting temperature above 1 claim 1 ,300° C.720. Gas purging plug according to claim 1 , wherein the refractory coating () comprises a lacquer coat with a thickness of less than 0.5 mm.8. Gas purging plug according to claim 7 , wherein the lacquer coat is made of a resin based lacquer.92022. Gas purging plug according to claim 7 , wherein the refractory coating () comprises discrete refractory grains () claim 7 , protruding the lacquer coating.1020. Gas purging plug according to claim 1 , wherein the refractory coating () ...

LANCES FOR TOP SUBMERGED INJECTION

A lance (), for conducting a pyrometallurgical operation by top submerged lancing (TSL) injection, wherein the lance () has at least an inner pipe () and outer pipe () which are substantially concentric. The lower outlet of the inner pipe () is set at a level relative to the lower, outlet end of the outer pipe () required for pyrometallurgical operation. The lance () further includes a shroud () through which the outer pipe () extends and which is mounted on and extends along an upper portion of the outer pipe () to define with the outer pipe () a passageway () along which gas is able to be supplied for flow towards the outlet end of the outer pipe () for discharge exteriorly of the lance (). The shroud () is longitudinally adjustable relative to the outer pipe () to enable substantial maintenance of or variation in, a longitudinal spacing between the outlet ends of the shroud () and the outer pipe (). 1. A lance , for conducting a pyrometallurgical operation by top submerged lancing (TSL) injection , wherein the lance has at least inner and outer substantially concentric pipes with the lower outlet end of the inner or at least the next innermost pipe set at a level relative to the lower , outlet end of the outer pipe required for the pyrometallurgical operation; and wherein the lance further includes a shroud through which the outer pipe extends and which is mounted on and extends along an upper portion of the outer pipe to define with the outer pipe a passageway along which gas is able to be supplied for flow towards the outlet end of the outer pipe for discharge exteriorly of the lance , and the shroud is longitudinally adjustable relative to the outer pipe to enable substantial maintenance of , or variation in , a longitudinal spacing between the outlet ends of the shroud and the outer pipe.2. The lance of claim 1 , wherein movement of the shroud relative to the outer pipe is enabled so as to maintain a substantially constant longitudinal spacing between the ...

Alloy refining methods

A method of decarburizing a molten alloy may generally comprise injecting a first gas comprising at least one of argon, carbon dioxide, and oxygen through a first fluid-conducting portion of a tuyere into the molten alloy below the surface of the molten alloy, and injecting a second gas comprising at least one of argon and carbon dioxide through a second fluid-conducting portion of the tuyere into the molten alloy below the surface of the molten alloy. The tuyere may comprise an inner portion concentrically aligned within an outer portion to define an annulus therebetween. The first gas may be injected through the inner portion, and the second gas may be injected through the annulus.

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 , ...

REFRACTORY PURGING DEVICES

A device for blowing gas into a metallurgical vessel contains at least one gas flow channel fluidly connecting a gas inlet located at one end to a gas outlet located at the opposite end. The channel is in the shape of a slit. The gas channel contains a series of continuous concave bridges connecting the opposing surfaces defining the channel, with their concave side oriented towards the gas outlet. The concave bridges are disposed in a staggered arrangement, such that any shortest line running from the gas outlet to the gas inlet of the channel necessarily intercepts the concave side of at least one bridge. The device is resistant to clogging by infiltrated molten metal or slag. 119-. (canceled)20. A refractory purging device for blowing gas into molten metal in a metallurgical vessel , the refractory purging device comprising a refractory main body which defines a gas inlet at a first longitudinal end for receiving purging gas , a gas outlet at a second longitudinal end for the purging gas to enter the molten metal , and a gas passage channel interconnecting the gas inlet and the gas outlet; wherein a plurality of molten metal receptacles for capturing or intercepting and retaining molten metal that flows reversely from the gas outlet into the gas passage channel is distributed in the gas passage channel , wherein ,each molten metal receptacle comprises a pocket portion or a miniaturized reservoir to retain the molten metal that is captured or intercepted at the molten metal capture aperture,the receptacles are forming bridges connecting first and second opposing surfaces defining the channel andthe gas passage channel defines a gas flow direction and a metal flow direction which is opposite the gas flow direction, and wherein the molten metal receptacles comprise a wall portion which protrudes into the gas passage channel in a direction orthogonal or substantially orthogonal to the metal flow direction to define the molten metal capture aperture and the pocket ...

Plant complex for producing steel and a method for operating the plant complex

A plant complex for producing steel, having a blast furnace for producing pig iron; a converter steel works for producing crude steel; a gas pipeline system for gases that occur in the production of pig iron and/or the production of crude steel; a chemical plant and/or a biotechnology plant which are/is connected to the gas pipeline system, wherein the plant complex additionally includes a biogas plant which is connected to the gas pipeline system.

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 ...

METHODS FOR CONTROLLING THE POSITION OF FURNASE LANCES

Methods for controlling the position of a lance supplying oxygen to a furnace containing a bath of molten metal. The methods include the steps of continuously detecting actual conditions associated with the furnace, continuously comparing the actual conditions to target parameters corresponding to the actual conditions, and continuously adjusting the position of the lance with respect to the furnace based on the comparison of the actual conditions to the target parameters. 1. A method for controlling the position of a lance supplying oxygen to a furnace containing a bath of molten metal , comprising the steps of:evaluating a resistivity of the bath when the lance is electrically insulated with a first measuring device that detects resistance of the bath;continuously comparing the resistivity of the bath to a first resistivity target parameter corresponding to the resistance of the bath; andcontinuously adjusting the position of the lance with respect to the furnace based on the comparison of the resistivity of the bath to the first resistivity target parameter.2. The method of claim 1 , further comprising the steps of:evaluating a resistivity of the bath when the lance is not electrically insulated with a second measuring device that detects resistance of the bath;continuously comparing the resistivity of the bath to a second resistivity target parameter corresponding to the resistance of the bath; andcontinuously adjusting the position of the lance with respect to the furnace based on the comparison of the resistivity of the bath to the second resistivity target parameter.3. The method of claim 1 , further comprising the steps of:evaluating a furnace vibration frequency with a third measuring device that detects frequency of vibrations of the furnace;continuously comparing the furnace vibration frequency to a furnace vibration target parameter corresponding to the frequency of vibrations of the furnace; andcontinuously adjusting the position of the lance with ...

BOTTOM STIRRING TUYERE AND METHOD FOR A BASIC OXYGEN FURNACE

A method of operating a BOF bottom stir tuyere having an inner nozzle surrounded by an annular nozzle, including during a hot metal pour phase and a blow phase, flowing an inert gas through both nozzles; during a tap phase, initiating a flow of a first reactant through the inner nozzle and a flow of a second reactant through the annular nozzle, and ceasing the flow of inert gas through the nozzles, wherein the first and second reactants includes fuel and oxidant, respectively, or vice-versa, such that a flame forms as the fuel and oxidant exit the tuyere; during a slag splash phase, continuing the flows of fuel and oxidant to maintain the flame; and after ending the slag splash phase and commencement of another hot metal pour phase, initiating a flow of inert gas through both nozzles and ceasing the flows of the first and second reactants. 1. A method of operating a bottom stir tuyere in a basic oxygen furnace for steel making , wherein the bottom stir tuyere has a concentric nozzle arrangement with an inner nozzle surrounded by an annular nozzle , the method comprising:(a) during a hot metal pour phase, flowing an inert gas through both nozzles of the bottom stir tuyere;(b) during a blow phase, continuing to flow the inert gas through both nozzles of the bottom stir tuyere;(c) during a tap phase, initiating a flow of a first reactant and ceasing the flow of inert gas through the inner nozzle of the tuyere, and initiating a flow of a second reactant and ceasing the flow of inert gas through the annular nozzle of the tuyere, wherein the first reactant includes one of fuel and oxidant and the second reactant includes the other of fuel and oxidant, such that a flame forms as the fuel and oxidant exit the tuyere;(d) during a slag splash phase, continuing the flows of fuel and oxidant to maintain the flame; and(e) after ending the slag splash phase and commencement of another hot metal pour phase, initiating a flow of inert gas through both nozzles of the bottom stir ...

METHOD FOR OPERATING AN OXYGEN BLOWING LANCE IN A METALLURGICAL VESSEL AND A MEASUREMENT SYSTEM FOR DETERMINING A MEASUREMENT SIGNAL USED IN THE METHOD

A method for operating a blowing lance for blowing a gas in a metallurgical vessel, wherein the head of the blowing lance includes at least one supersonic nozzle, operating parameter measurement signals used for the purpose of process control are continuously acquired. The inlet pressure and/or the inlet temperature of the gas at the supersonic nozzle and/or the vibration amplitude and/or the vibration frequency of the blowing lance and/or the time at which ignition occurs during the oxygen blowing process and/or the location at which ignition occurs during the oxygen blowing process is detected and/or measured in the head of the lance by a detector or sensor arranged in the head of the lance near the supersonic nozzle during operation of the blowing lance. The measurement signal(s) are transmitted to a control unit connected to the detector or sensor and made available for controlling the operation of the blowing lance. 1. A method for operating a blowing lance for blowing a gas in a metallurgical vessel , wherein a replaceable head of the blowing lance comprises at least one supersonic nozzle , the method comprising the steps of: detecting and/or measuring inlet pressure and/or inlet temperature of the gas at the at least one supersonic nozzle and/or vibration amplitude and/or vibration frequency of the blowing lance and/or a time at which ignition occurs during an oxygen blowing process and/or a location at which ignition occurs during the oxygen blowing process , in the head of the lance with a detector or sensor arranged in the head of the lance in an area of the supersonic nozzle during operation of the blowing lance; and transmitting measurement signal(s) thus acquired during the operation of the blowing lance , to an evaluation and/or process control unit connected to the detector or sensor and making the signals available for controlling the operation of the blowing lance.2. The method according to claim 1 , wherein the inlet pressure of the gas at an ...

Method for reducing slag

Disclosed herein is a method of reducing slag, including the steps of: examining the components of slag to be reduced, and setting a target composition ratio after reduction; determining the mixing ratio and input amount of a complex reducing agent of a plurality of reducing agents in accordance with the set target composition ratio to determine the complex reducing agent; and supplying the complex reducing agent into molten slag to reduce the slag. The method is advantageous in that the reduction efficiency of slag can be maximized, various kinds of reducing agents can be efficiently used, and the recovery amount of valuable metals can be increased, thus reducing cost.

WATER-BASED HEAT TRANSFER FLUID COOLING SYSTEMS INTRINSICALLY SAFE FROM BOILING LIQUID EXPANDING VAPOR EXPLOSION (BLEVE)IN VARIOUS PYROMETALLURGICAL FURNACE APPLICATIONS

A cooling system for use in support of a pyro-metallurgical furnace includes a liquid heat transfer fluid blend of 10%-50% water with monoethylene glycol (MEG), diethylene glycol (DEG), or triethylene glycol (TEG), and corrosion inhibitors. When using such glycols, a minimum of 10% water prevents the heat transfer fluid from becoming too viscous for economical pumping, and a maximum of 50% water prevents BLEVE incidents inside the furnace. Such intrinsically safe cooling system circulates the liquid heat transfer fluid blend with an optimally sized pump, filtration, pressurization, and at flow velocities sufficient to avoid film boiling. 1. A water-based heat transfer fluid cooled system that is intrinsically safe from BLEVE when used in a pyro-metallurgical furnace , comprising:at least one water-cooled appliance comprising a vertical lance, a subsonic top submerged lance (TSL), a sonic lance, a torch, a tuyere, and a burner block, as are variously included in both ferrous and nonferrous pyro-metallurgical furnaces;a coolant circulation network disposed in, jacketed around, or embedded within the water-cooled appliance of the furnace and providing for intrinsically safe liquid cooling of the appliance;a coolant comprising a blended mixture of a single phase organic compound of glycol alcohol, water, and a corrosion inhibitor, wherein the water is limited to a range of about 10% to 50% of the total by weight, and wherein all of the water is fully absorbed in the glycol alcohol; anda pump with a particular critically sized minimum capacity dependent on the viscosity and specific heat of the coolant and that circulates the coolant through the coolant circulation network at a predetermined minimum volume and velocity to preclude film boiling;wherein, the coolant continually physically absorbs the water and desiccates the interior passages of the coolant circulation network such that a leak of the coolant into the pyro-metallurgical furnace cannot cause a BLEVE with ...

METAL MAKING LANCE WITH SPRING-LOADED THERMOCOUPLE OR CAMERA IN LANCE TIP

An oxygen blowing lance comprising: a lance body including an oxygen conduit and cooling water inlet and outlet conduits surrounding said oxygen conduit; a lance head connected to said lance body and comprising a nozzle body, said nozzle body including a central strut having bore hole, a plurality of nozzles arranged about said central strut, and a plurality of cooling chambers arranged about said central strut, wherein said plurality of nozzles are in fluid communication with said oxygen conduit for discharging oxygen from said oxygen conduit onto a metal bath in a converter vessel, and wherein said plurality of cooling chambers are in fluid communication with said cooling water inlet and outlet conduits; a temperature probe or camera assembly received in said bore hole for monitoring the temperature of said lance head or molten heat in which the lance is inserted; signal lines connected to said temperature probe for conveying signals from said temperature probe whereby operation of said blowing lance is regulated in response to said signals; and a protective pipe pressurized with a gas disposed in the bore and surrounding said temperature probe assembly and the signal lines. 1. An oxygen blowing lance comprising:a lance body including an oxygen conduit and cooling water inlet and outlet conduits surrounding said oxygen conduit;a lance head connected to said lance body and comprising a nozzle body, said nozzle body including a central strut having bore hole, a plurality of nozzles arranged about said central strut, and a plurality of cooling chambers arranged about said central strut, wherein said plurality of nozzles are in fluid communication with said oxygen conduit for discharging oxygen from said oxygen conduit onto a metal bath in a converter vessel, and wherein said plurality of cooling chambers are in fluid communication with said cooling water inlet and outlet conduits;a temperature probe assembly received in said bore hole for monitoring the temperature ...

Blowing Spear for Fabrication of Metals and Maintenance of Loading and Blowing Operational Conditions

The current invention refers to a blowing spear () used in the primary refining process for obtainment of steel, developed in such a way to maintain the loading and blowing operational conditions, comprising at the base a copper nozzle () to which is welded in its extremity a tube (), comprising yet a module () with cleaning output () and positioned above module () a steel tube () and on its upper extremity, the head () that comprises a cooling liquid inlet (), a gases inlet () and a cooling liquid outlet (), comprising yet the spear () in its interior the inner tube () responsible for the gas passage and the intermediate tube () responsible for the division between the cooling liquid inlet flow and its outlet passing mandatorily through the copper nozzle (). 1100101102125103125118107115116117100122123101. “BLOWING SPEAR FOR FABRICATION OF METALS AND MAINTENANCE OF LOADING AND BLOWING OPERATIONAL CONDITIONS” characterized for comprising a set () having at the base a copper nozzle () to which is welded on its extremity a tube () , having yet a module () with the cleaning outlets () and positioned above module () a steel tube () and on its upper extremity , head () , which comprises a cooling liquid inlet () , a gases inlet () and a cooling liquid outlet () , having yet the spear () in its interior the inner tube () responsible for the gas passage and the intermediate tube () responsible for the division between the cooling liquid inlet flow and its outlet , passing mandatorily through the copper nozzle ().2101118102101. Spear according to claim 1 , characterized for having between the copper nozzle () and the steel tube () claim 1 , the conical form tube () claim 1 , haying its smaller diameter welded to the copper nozzle extremity ().3102. Spear according to claim 1 , racterized by the conical tube () being preferably manufactured copper.4103125. Spear according to characterized for having cleaning outlets () distributed in a copper module ().5103. Spear according ...

DRY DUST REMOVAL FROM FURNACE GAS

A process and a plant for cleaning furnace gas includes utilizing one or more sensors to continuously monitor one or more parameters indicative for an expected temperature peak in the blast furnace gas flow. The gas flow is then passed through a conditioning tower. In case the measured parameter exceeds a predefined limit value, a coolant, such as water, is sprayed into the blast furnace gas flow in the conditioning tower. Subsequently the flow of blast furnace gas passes one or more filter stations. 1. A process for cleaning furnace gas , comprising the following steps:one or more sensors are used to continuously monitor one or more parameters indicative for an expected temperature peak in the furnace gas flow;the furnace gas flow is then passed through a conditioning tower;in case the measured parameter exceeds a predefined limit value, a coolant, e.g., water, is sprayed into the furnace gas flow in the conditioning tower;subsequently the flow of furnace gas passes one or more filter stations.2. The process of claim 1 , wherein the coolant is sprayed co-currently with the furnace gas flow.3. The process of claim 1 , wherein the parameter includes a temperature of the furnace gas flow measured at an off-take of a blast furnace.4. The process of claim 1 , wherein the mean residence time of the furnace gas in the conditioning tower is at least 3 seconds.5. The process of claim 1 , wherein the furnace gas flows downwards through the conditioning tower.6. A plant for metal production claim 1 , such as the production of steel or iron claim 1 , the plant comprising a furnace with an off take for furnace gas and a downstream conditioning tower comprising nozzles connected to a coolant supply line.7. The plant of claim 6 , wherein at least a part of the nozzles are directed in a flow direction.8. The plant of claim 6 , wherein nozzles are positioned at an upstream end of a conical section of the conditioning tower claim 6 , which conical section widens in flow direction.9. ...

BLOW LANCE ASSEMBLY FOR METAL MANUFACTURING AND REFINING

The instant invention relates to a blow lance assembly for metal manufacturing and refining, developed so as to control slag formation and oxidation, as well as the heat capacity of the reactor, and the conservation of the operational conditions during charging and blowing, having, in its lower part, two groups of gas outlets which determine two blowing conditions, the first group consisting of oxygen passage nozzles having a converging-diverging shape, main responsible for the oxidation reactions and for the conveyance of the basic solid material, mainly calcium oxide, for initial slag formation, and dephosphorization at the final stages during batch refining; the second group consisting of secondary jets with various functions during each blowing stage, the first function, at the beginning of the process as an afterburning agent, through the reaction of oxygen with carbon monoxide generated by the main jets, and the second function being that of accelerating the reaction with carbon by increasing oxygen jet speed, accelerating scrap melting in the early stages and, finally, incrementing the oxidation of the elements of the metal bath, iron, in order to reduce the phosphorus content in the final stages of batch refining. 1114101116117115105119. A blow lance assembly for manufacturing and refining metals , comprising a lower afterburning module () built into a copper nozzle () , and including secondary outlets for lower oxygen () and combustible gases () , which surround a converging-diverging primary oxygen outlet () , and in which a main oxygen pipe () contains in its interior a pulverized solid material injection pipe ().2116117. The blow lance assembly claim 1 , according to claim 1 , in which said assembly has secondary outlets for oxygen () and combustible gases () claim 1 , with independent control of primary oxygen.3119. The blow lance assembly claim 1 , according to claim 1 , in which injection of the pulverized solid material through the pipe () is carried ...

METHOD FOR REDUCING CO2 EMISSIONS IN THE OPERATION OF A METALLURGICAL PLANT

The invention relates to a method for reducing COemissions in the operation of a metallurgical plant which comprises at least one blast furnace for producing crude iron and a converter steel mill for producing crude steel. According to the invention, at least a partial amount of the blast-furnace top gas that occurs in the blast furnace in the production of crude iron and/or a partial amount of the converter gas that occurs in the production of crude steel is taken for producing syngas that is used for producing chemical products. At the same time, the energy demand of the metallurgical plant is at least partly covered by using electricity that is obtained from renewable energy. 19.-. (canceled)10. A method for reducing COemissions in the operation of a metallurgical plant which comprises at least one blast furnace for producing crude iron and a converter steel mill for producing crude steel , the method comprising:a) producing syngas from a partial amount of the blast-furnace top gas that occurs in the blast furnace in the production of pig iron and a partial amount of the converter gas that occurs in the production of crude steel, the syngas being used for producing chemical products, wherein 1% to 60% of the raw gases that occur as blast-furnace top gas and converter gas are used for producing the syngas; andb) covering the energy demand of the metallurgical plant at least partly by using electricity that is obtained from renewable energy.11. The method according to claim 10 , wherein 10% to 60% of the raw gases that occur as blast-furnace top gas and converter gas are used for producing syngas.12. The method according to claim 10 , wherein the metallurgical plant is operated in combination with a coke-oven plant claim 10 , and wherein at least a partial amount of a coke-oven gas that occurs in the coke-oven plant is used for producing syngas.13. The method according to claim 10 , wherein 1% to 60% of the raw gases that occur as blast-furnace top gas claim 10 , ...

Methods for producing improved steels by injecting iron containing by-products of an iron ore production process into liquid steel

Disclosed herein are methods and compositions for producing improved steels comprising injecting iron containing by-products of an iron ore production process into a liquid steel, wherein the iron containing by-products of an iron ore production process further comprise direct reduced iron (DRI) fines. The resulting improved steel exhibits lower nitrogen content than one measured for a substantially identical reference composition produced in the absence of the direct reduced iron fines.

METHOD AND DEVICE FOR PREDICTING, CONTROLLING AND/OR REGULATING STEELWORKS PROCESSES

The present invention relates to a method for predicting, controlling and/or regulating steelworks processes, comprising the steps of monitoring at least two input variables related to a target variable, determining the relationship between the at least two input variables and at least one target variable by means of regression analysis or classification methods, and using the determined target variable for predicting, controlling and/or regulating the steelworks process. 1. A method for predicting , controlling and/or regulating steelworks processes , comprising the steps:monitoring of at least two input variables related to one target variable,determination of the correlation between the entities to input variables and at least one target variable by means of regression analysis or classification method, andutilization of the determined target variable for predicting, controlling and/or regulating the steelworks process, wherein a SVM (Support Vector Machine) method is used for determining the target variable, and wherein the SVM is provided both input variables as well as also dynamic input variables.2. The method according to claim 1 , wherein the method is carried out in real time.3. (canceled)4. The method according to claim 1 , wherein multiple input variables and a lesser number of target variables are correlated to one another by means of the SVM method.5. The method according to claim 1 , wherein results from model calculations of the SVM method are provided claim 1 , preferably for broadening the database.6. (canceled)7. The method according to claim 1 , wherein preprocessing of the input variables is carried out such that static and/or dynamic input variables are combined claim 1 , dynamic input variables are transformed claim 1 , and or dynamic claim 1 , combined and/or transformed input variables are aggregated.8. The method according to claim 1 , wherein measuring data are weighted differently claim 1 , in order to counteract a continuous variation of ...

GAS PURGING ELEMENT AND CORRESPONDING GAS SUPPLY LINE

The invention relates to a gas purging element at a metallurgical vessel as well as a corresponding gas supply pipe. 110. Gas purging element () for metallurgical applications with the following characteristics:{'b': 10', '10', '10, 'i': k', 'u', 'o, 'a) a ceramic fireproof body () with a first end () and a second end (),'}{'b': '10', 'i': 'o', 'b) the second end () is in the mounted position of the gas purging element in contact with a metal melt,'}{'b': 10', '12', '16', '20', '20', '20', '1', '20', '2, 'i': 'u', 'c) the first end () is covered by a metal coat (), which features an opening () to which a gas supply adapter () connects, the gas supply adapter () has a first end (.) and a second end (.),'}{'b': 10', '10', '20', '20', '10', '10', '10, 'i': k', 'k', 'k', 'o, 'd) the gas purging element (), the body () and the gas supply adapter () are designed in such a way that a treatment gas which is supplied via the gas supply adapter () flows through the body () and exits the body () at the second end (),'}{'b': 20', '2', '20', '22', '12', '20', '1', '20', '30, 'e) at the second end (.) the gas supply adapter () is connected via a gas connection area () to the metal coat (), and at the first end (.) the gas supply adapter (/) is designed as a plug or as a socket of a push-fit connection for connection to a corresponding socket or a corresponding plug of the gas supply pipe (), wherein'}{'b': '20', 'f) the gas supply adapter (), which is designed as a socket, features one of the following geometric shapes on the outside: negative cone, negative frustocone, negative prism.'}21020102212k. Gas purging element () according to claim 1 , wherein the gas supply adapter () extends away from the ceramic body () claim 1 , starting from the connection area () to the metal coat ().31020102212k. Gas purging element () according to claim 1 , wherein the gas supply adapter () extends towards the ceramic body () claim 1 , starting from the gas connection area () to the metal coat ...

Method and apparatus for controlling the pressure in the exhaust gas duct of a converter

The invention relates to a method and an apparatus for controlling the pressure in the exhaust gas duct of a converter in a steel mill using a pressure control loop. To optimize the defined pressure setpoint for the pressure control loop so as to prevent excessive amounts of outside air from being drawn in via the converter mouth, the pressure setpoint is determined according to the invention by adapting a raw value based on the extent to which smoke or flames is/are formed at the mouth () of the converter (). 112-. (canceled)13110100. A method for controlling pressure in an exhaust gas duct () of a converter () in a steel mill to a defined pressure setpoint by the appropriate adjustment of control variables , characterized by the following steps for determining the pressure setpoint:{'b': 122', '120, 'defining a raw value for the pressure setpoint dependent on a measured degree of openness of an adjustment ring () at a converter mouth (), and'}{'b': '120', 'determining the pressure setpoint by adaptation of the raw value in form of an increase of the raw value when an extent of smoke or flame formation at the mouth () of the converter is reduced, and vice versa.'}14120. The method according to claim 13 , characterized in that the extent of smoke and flame formation is determined by analyzing image material that shows the current smoke and flame formation at the mouth () of the converter during a converter operation.15. The method according to claim 14 , characterized in that claim 14 , in the image material analysis claim 14 , essentially only portions in the infrared spectral range are analyzed claim 14 , while interference signals in the visible spectral range are suppressed.16. The method according to claim 13 , characterized in that the raw value is further adapted so that the raw value is decreased when the quantity of oxygen that is supplied is increased claim 13 , and vice versa.17112112114. The method according to claim 13 , characterized in that the ...

PROCESS AND SYSTEM FOR ELIMINATING THE POTENTIAL FOR LD AND EAF STEEL SLAG EXPANSION

The present invention relates to a process and to a system for eliminating the expandability of steel-plant slag, which comprises a primary crusher () to reduce the fragments according to their granulometry; a magnetic separator () to remove metallic fragments bigger than a determined granulometry (); a rotary dryer () to dry slag free from bigger metallic fragments; an impact mill () to disaggregate and fragment slag particles that are bigger than a predetermined granulometry; a classifier () for aero-classification and drag of fine and superfine particles; a cooler () for cooling slag particles bigger than a predetermined granulometry by means of heat exchange and removal of the fine and superfine particles that were not collected by the impact mill (); a vibrating sieve () provided with two or more decks ( and ) with screens of predetermined sizes; low-intensity magnetic separators ( and ), with generation of non-magnetic slag fractions free from metallic iron and from iron monoxide, and of magnetic fractions composed by metallic iron and iron monoxide; and low-intensity magnetic separators ( and ) to reprocess the magnetic fractions with generation of concentrate with high metallic iron contents and a product with high concentration of iron monoxide. 1. A process for eliminating the expandability of steel-plant slag , characterized by comprising the steps of:{'b': '1', 'claim-text': [{'b': '3', 'b) feeding a primary crusher () to reduce the fragments depending on their gain size, which takes place by virtue of the natural moisture of the slag;'}, {'b': 3', '4', '5, 'c) collecting the material processed by the primary crusher () and transporting it to a magnetic separator (), in which metallic fragments bigger than a determined grain size () are removed;'}, {'b': 5', '6, 'd) drying the slag free from bigger metallic fragments () in a rotary dryer ();'}, {'b': 10', '11, 'e) feeding the dry slag () to an impact mill () that discharges and fragments bigger slag up ...

Jacketed Rotary Converter and PGM Converting Process

Jacketed rotary converter. The converter includes an inclined pot mounted for rotation about a longitudinal axis, a refractory lining for holding a molten alloy pool, an opening in a top of the pot for introducing feed, a lance for injecting oxygen-containing gas, a heat transfer jacket for the pot adjacent the refractory lining, and a coolant system to circulate a heat transfer medium through the jacket to remove heat from the alloy pool in thermal communication with the refractory lining. Also disclosed is a PGM converting process using the jacketed rotary converter. The process can also include low- or no-flux converting; refractory protectant addition; slag separation; partial feed pre-oxidation; staged slagging; and/or smelting the slag in a secondary furnace with primary furnace slag. 1. A rotary converter , comprising:an inclined converter pot mounted for rotation about a longitudinal axis;a refractory lining in the pot for holding a molten alloy pool;an opening in a top of the pot to introduce a converter feed into the pot with the alloy pool;a lance for injecting oxygen-containing gas into the alloy pool;a heat transfer jacket for the pot adjacent the refractory lining; anda coolant system to circulate a heat transfer medium through the jacket to remove heat from the alloy pool in thermal communication with the refractory lining.2. The rotary converter of claim 1 , further comprising a tap to recover slag and alloy from the pot.3. The rotary converter of claim 1 , further comprising a control system to adjust the coolant supply and oxygen-containing gas injection for maintaining a temperature in the alloy pool between 1250° C. and 1800° C.4. The rotary converter of claim 3 , wherein the control system maintains a temperature of 1450° C. or more.5. The rotary converter of claim 3 , wherein the coolant is aqueous.6. The rotary converter of claim 1 , further comprising:a shaft and a motor to drive the rotation of the pot; anda rotary coupling to supply and ...

Converting Process with Slag Separation and Recycle

Converting process with slag separation and recycle to the converter. The process includes introducing converter feed into the pot holding a molten alloy pool, oxygen injection into the pool, tapping the slag, and tapping the PGM-enriched alloy. The collector alloy contains no less than 0.5 wt % PGM, 40 wt % iron, and 0.5 wt % nickel, and no more than 3 wt % sulfur and 3 wt % copper, and the recovered slag is separated into recycle and non-recycle portions. The recycle slag portion preferably contains more PGM than the non-recycle portion. The process can also include low- or no-flux converting; using a refractory protectant in the converter; magnetic separation of slag; partial pre-oxidation of the converter feed; smelting catalyst material in a primary furnace to produce the collector alloy; and/or smelting the converter slag in a secondary furnace with slag from the primary furnace.

EFFICIENT LONG-SERVICE-LIFE BLOWING METHOD AND SYSTEM FOR VANADIUM EXTRACTION-DECARBURIZATION DUPLEX CONVERTERS

An efficient long-service-life blowing method include the steps of introducing vanadium extraction converter flue gas and decarburization converter flue gas into an oxygen combustor; obtaining first-purity CO—Nmixed gas through the vanadium extraction converter flue gas; obtaining second-purity CO—Nmixed gas through the decarburization converter flue gas; obtaining O—CO—Nmixed gas through the decarburization converter flue gas; obtaining first-purity COgas through the second-purity CO—Nmixed gas; and using the first-purity CO—Nmixed gas for bottom blowing of the vanadium extraction converter, using the second-purity CO—Nmixed gas as a carrier gas for blowing iron ore powder into the vanadium extraction converter, and using the O—CO—Nmixed gas and the first-purity COgas as a carrier gas for bottom blowing of the decarburization converter and bottom injecting of lime powder into the decarburization converter. 1. An efficient long-service-life blowing method for vanadium extraction-decarburization duplex converters , wherein a staged control strategy is adopted in a smelting process of a vanadium extraction converter and a decarburization converter , the proportion and flow rate of gas media with different purities are adjusted in stages , and the method comprises the following steps:introducing vanadium extraction converter flue gas and decarburization converter flue gas into an oxygen combustor separately;{'sub': 2', '2, 'carrying out complete combustion on the vanadium extraction converter flue gas in an oxygen atmosphere to obtain a first-purity CO—Nmixed gas;'}{'sub': 2', '2, 'carrying out complete combustion on the decarburization converter flue gas in an oxygen atmosphere to obtain a second-purity CO—Nmixed gas;'}{'sub': 2', '2', '2, 'carrying out oxygen-excess combustion on the decarburization converter flue gas in an oxygen atmosphere to obtain a O—CO—Nmixed gas;'}{'sub': 2', '2', '2, 'introducing a first part of the second-purity CO—Nmixed gas into a ...

PRODUCTION METHOD FOR SMELTING CLEAN STEEL FROM FULL-SCRAP STEEL USING DUPLEX ELECTRIC ARC FURNACES

A production method for smelting clean steel from full-scrap steel using duplex electric arc furnaces, which belongs to the field of electric arc furnace steelmaking. This method makes electric arc furnaces located in two positions be connected in series, wherein the electric arc furnace in a first position is dephosphorization electric arc furnace, and the electric arc furnace in a second position is decarbonization electric arc furnace. 1. A production method for smelting clean steel from full-scrap steel using duplex electric arc furnaces , characterized in that , smelting is conducted by combining 1 decarbonization electric arc furnace and 1˜3 dephosphorization electric arc furnaces; the specific process is as follows:(1) a charging period of dephosphorization electric arc furnace: adding scrap steel for smelting, lime, slag in the decarbonization electric arc furnace, auxiliary material and carbon powder or block into the dephosphorization electric arc furnace;wherein, the scrap steel is brought into the furnace using any one or several ways of continuous charging, shaft charging and basket charging; the lime, the slag in the decarburization electric arc furnace, the auxiliary material and the scrap steel are all added into the dephosphorization electric arc, furnace; an amount of addition of the lime is 0-50 kg per ton of steel; an amount of addition of the slag in the decarburization electric arc furnace is 0-50 kg per ton of steel; the carbon powder is added into furnace hearth through a charging bin, and an amount for adding or injecting carbon material is 0-200 kg per ton of steel;(2) a melting period of the scrap steel: melting scrap steel through power-on and switching furnace wall cluster oxygen lance to the burner mode, to increase the temperature in the furnace hearth to melt the scrap steel; meanwhile injecting high speed powder-air flow of carrier gas and carbon powder to an interior of molten steel by submerged spray lance to reduce melting point ...

CONTROLLING OPERATION AND POSITION OF A LANCE AND NOZZLE ASSEMBLY IN A MOLTEN METAL BATH IN A VESSEL

The present invention preferably comprises a system and method for operating and/or positioning a lance and nozzle assembly relative to a molten metal bath in a vessel. Specifically, at least one temperature sensor is provided proximate a tip of the lance and nozzle assembly and at least one temperature sensor is provided on or in the vessel. A processing unit is configured to receive at least one signal from each of the temperature sensors, process the signals to determine the active position of the lance and nozzle assembly relative to the metal bath, and move the lance and nozzle assembly to a preferred position the corresponds to a stage of operation in the vessel. 1. A method for operating and/or positioning a lance and nozzle assembly relative to a molten metal bath in a vessel , the method comprising:providing a first temperature sensor proximate to a tip of the lance and nozzle assembly, wherein the first temperature sensor is housed by the lance and nozzle assembly, wherein the first temperature sensor is configured to detect a temperature of the tip of the lance and nozzle assembly, and wherein the temperature is converted to tip temperature data;providing a second temperature sensor on or within the vessel, wherein the second temperature sensor is configured to detect a temperature of the molten metal bath, and wherein the temperature is converted to bath temperature data;transmitting the tip temperature data and the bath temperature data to a processing unit;exchanging information between the processing unit and a process operations data module, wherein the information comprises the tip temperature data, the bath temperature data, and process operations data;mapping the tip temperature data and the bath temperature data to a corresponding active elevation of the lance and nozzle assembly;comparing the active elevation to a preferred elevation of the lance and nozzle assembly; andmoving the lance and nozzle assembly from the active elevation to the ...

TILTABLE EXCHANGEABLE METALLURGICAL VESSEL AND METHOD FOR FIXING AND RELEASING A TILTABLE METALLURGICAL VESSEL

The invention relates to the subject area of metallurgical systems, in particular a metallurgical vessel which is fixed on a support ring. The object of the invention is to provide a metallurgical vessel having a support ring and a method for fixing and releasing, which prevents constraint forces. The tiltable metallurgical vessel having a round cross-section is at least partially surrounded by a support ring. The support ring is at a distance from the metallurgical vessel in the radial direction. The metallurgical vessel has at least three brackets, each having a respective pin. The support ring has at least three receiving openings which receive the pins. These receiving openings permit a shifting of the pin in the radial direction. The pins are secured against falling out of the receiving opening and the bracket by at least three locking devices floatingly mounted and arranged inside the support ring. 114-. (canceled)15. A tiltable metallurgical vessel comprising:a round cross section; andat least three brackets, each having a respective pin;wherein the metallurgical vessel is at least partially surrounded by a support ring, and the support ring is at a distance from the metallurgical vessel in the radial direction, the support ring having at least three receiving openings suitable for receiving the pins; andwherein the receiving openings permit shifting of the pin in the radial direction, and there are at least three locking devices floatingly mounted and arranged inside the support ring, which secure the pins against falling out of the receiving opening and the bracket.16. The tiltable metallurgical vessel as claimed in claim 15 , wherein:the pin has a wedge pressure surface;the floatingly mounted locking devices have a wedge; andthe floatingly mounted locking device is suitable for bringing the wedge into connection with the wedge pressure surface to secure the pin against falling out of the receiving opening and the bracket.17. The tiltable metallurgical ...

PROCESS FOR INJECTING PARTICULATE MATERIAL INTO A LIQUID METAL BATH

The invention relates to a process for injecting particulate material into a liquid metal bath wherein the liquid metal bath contains species to be oxidized, wherein the particulate material is carried to the liquid bath by means of a first gas stream. The solids injection rate is controlled such that the liquid bath temperature and/or the evolution of the liquid bath temperature is maintained within a pre-defined temperature range and the penetration depth of the first gas stream into the liquid bath is controlled by adjusting the flow of the first gas stream. At least one second gas stream is injected into the liquid, wherein the first and the second gas streams are an oxidizing gas, in particular oxygen, and the sum of the gas flows of the first and the second gas streams is determined based on the mass of the species to be oxidized and on the desired time for oxidizing the mass of the species. 2. Process according to claim 1 , characterized in that the lance is provided at a lance height above the liquid bath claim 1 , the lance height being defined as the distance in axial direction between the outlet of the solids injection pipe and the surface of the liquid bath claim 1 , and that the penetration depth of the first gas stream is controlled by adjusting the lance height and/or the flow of the first gas stream.3. Process according to claim 1 , characterized in that the first gas stream is provided at a velocity between 340 m/s and 1100 m/s claim 1 , preferably between 500 m/s and 900 m/s.4. Process according to claim 1 , characterized in that the second gas streams are provided at a velocity between 340 m/s and 1100 m/s claim 1 , preferably between 500 m/s and 900 m/s.5. Process according to claim 1 , characterized in that the penetration depth is less than 75% of the depth of the liquid bath claim 1 , preferably less than 50% of the depth of the liquid bath claim 1 , more preferred less than 25% of the depth of the liquid bath.6. Process according to claim 1 , ...

METHOD FOR OXYGEN-BLOWING REFINING OF MOLTEN IRON AND TOP-BLOWING LANCE

In a method for oxygen-blowing refining of molten iron, an oxygen-containing gas as a main supply gas is supplied from an inlet side of a blowing nozzle for the oxygen-containing gas passing through an outer shell of the top-blowing lance and blown from the blowing nozzle while a control gas is jetted toward inside of the blowing nozzle for at least part of a period of the oxygen-blowing refining from a spout arranged in a side face of the nozzle at a site where the cross-sectional area of the nozzle minimum takes the minimum in the axial direction of the nozzle or a neighborhood thereof so that at least part of the spout exists in each space formed by dividing into two portions by an arbitrary plane passing through a central axis of the nozzle. 1. A method for oxygen-blowing refining of molten iron by blowing an oxygen-containing gas from a top-blowing lance onto molten iron charged in a reaction vessel to conduct oxygen-blowing refining of the molten iron , characterized in thatthe oxygen-containing gas as a main supply gas is supplied from an inlet side of a blowing nozzle for the oxygen-containing gas passing through an outer shell of the top-blowing lance and blown from the blowing nozzle while a control gas is jetted toward inside of the blowing nozzle for at least a part of a period of the oxygen-blowing refining from a spout arranged in a side face of the nozzle at a site where a cross-sectional area of the nozzle takes the minimum in the axial direction of the nozzle or a neighborhood thereof so that at least a part of the spout exists in each space formed by dividing the nozzle into two by an arbitrary plane passing through a central axis of the nozzle.2. The method for oxygen-blowing refining of molten iron according to claim 1 ,wherein the neighborhood of the site where the cross-sectional area of the nozzle takes the minimum in the axial direction of the nozzle is a site where the cross-sectional area of the nozzle is not more than 1.1 times of the ...

BLOW LANCE WITH WELDED NOZZLE HEAD FOR INFLATING GAS ON BATH

METHOD FOR MANUFACTURING MOLTEN IRON WITH ELECTRIC ARC FURNACE

A method for manufacturing molten iron by melting a cold iron source in an electric arc furnace having a carbonaceous material-injecting device. The method includes, in the carbonaceous material-injecting device, while a carbonaceous material is injected with a carrier gas through a central portion of the carbonaceous material-injecting device, injecting a fuel and a combustion-supporting gas through respective outer peripheral portions of the carbonaceous material-injecting device. The carbonaceous material injected through the central portion passes through a cylindrical combustion flame generated by a combustion reaction between the fuel and the combustion-supporting gas and is injected into molten slag and molten iron. 1. A method for manufacturing molten iron with an electric arc furnace , in which a cold iron source is melted to manufacture molten iron , the electric arc furnace having a carbonaceous material-injecting device , the method comprising:in the carbonaceous material-injecting device, while a carbonaceous material is injected with a carrier gas through a central portion of the carbonaceous material-injecting device, injecting a fuel and a combustion-supporting gas through respective outer peripheral portions of the carbonaceous material-injecting device,wherein the carbonaceous material injected through the central portion passes through a cylindrical combustion flame generated by a combustion reaction between the fuel and the combustion-supporting gas and is injected into molten slag and molten iron.2. The method for manufacturing molten iron with an electric arc furnace according to claim 1 , wherein injection flow velocities of the fuel and the combustion-supporting gas in the carbonaceous material-injecting device are higher than an injection flow velocity of the carrier gas of the carbonaceous material in the carbonaceous material-injecting device.3. The method for manufacturing molten iron with an electric arc furnace according to claim 1 , ...

Bottom blown steel converter and means for controlling injection of powdered material with process gasses therein

In connection with the bottom blown oxygen method of making steel, gases and powdered materials such as fluxes and additives are injected into the hot metal of the converter through tuyeres in the bottom of the vessel. The powdered materials are stored in pressure vessels and selectively transported to the converter by entraining the materials in high pressure process gases such as oxygen. Means are provided for maintaining constant material flow rates independent of gas pressure and flow variations. A rotary metering valve assembly is adapted for preventing back-flow of materials when gases are injected without entrained materials or when a second material is injected through a common entrainment point.

Werkwijze voor het bedrijven van een gasterugwinningssysteem.

一种转炉底喷石灰石粉炼钢的系统及其方法

本发明公开了一种转炉底喷石灰石粉炼钢的系统及其方法，包括粉罐车、环缝阀组、主吹阀组、喷粉罐、转炉，所述喷粉罐进料端设有安全阀和泄压阀，所述喷粉罐中下部设有流态化装置，所述流态化装置通过流态化管与环缝阀组连接，所述喷粉罐的底部出料端设有喷射器，所述喷射器与喷粉罐之间设有下料控制阀，所述喷射器一端通过主吹气管与主吹阀组连接，所述喷射器的另一端通过输料管道与转炉底部安装的双层套管式底吹喷枪连接，通过双层套管式底吹喷枪将制备的钝化石灰石粉由转炉底部喷入转炉内，根据转炉冶炼前、中、后期冶炼过程调整石灰石粉喷吹量，石灰石与钢水直接接触面积大大增加，极大地改善转炉的搅拌条件，从而大大提高石灰石的利用效率。

Method of monitoring the endpoint when refining low carbon steel in the oxygen converter

Patent FR2525632B1

Combination bottom- and top-blown steel smelting converter

1. СТАЛЕПЛАВИЛЬНЫЙ КОНВЕРТЕР С КОМБИНИРОВАННОЙ ПОДАЧЕЙ ДУТЬЯ СВЕРХУ И СНИЗУ В РАСПЛАВ, содержащий корпус с цапфами и днище, оборудованное устройством дл  подачи дуть  снизу в расплав, отличающийс  тем, что, с целью обеспечени  максимального перемешивани  металла при продувке, устройство дл  подачи дуть  снизу в расплав выполнено в виде периферийной группы газопроницаемых огнеупорных элементов , радиально расположенных в области днища со стороны цапф непосредственно у вертикальной боковой стенки корпуса, при этом указанные элементы размещены симметрично относительно проекции оси цапф на днище, проход щей через ось конвертера , и удалены -от проекции осу цапф на рассто ние, не превышающее половины радиуса днища конвертера. 2. Конвертер по п. 1, отлиЭ чающийс  тем, что днище обоV рудовано дополнительной группой гас зопроницаемых огнеупорных элементов, симметрично расположенных относительно линии, проход щей через ось конвертера перпендикул рно проекции оск цапф на днище, и удаленных от указанной проекции оси цапф на рассто ние , не превышающее половины ра диуса днища конвертера, при этом к каждой группе газопроницаемьпс огнеупорных элементов вьшолнен незави ( симый подвод газа. Х 1. STEEL-MOLDING CONVERTER WITH COMBINED BOTTOMING OF BOTTOM FROM TOP AND BOTTOM TO MASTER, comprising a housing with trunnions and a bottom, equipped with a device for feeding blowing from below into the melt, characterized in that, in order to ensure maximum mixing of the metal during blowing, the device for blowing is blown down the melt is made in the form of a peripheral group of gas-permeable refractory elements radially located in the bottom area from the trunnion side directly at the vertical side wall of the casing, with the specified elements s are arranged symmetrically with respect to the projection axis of the pins on the bottom, passing through the axis of the vessel, and removed -from projection wasp pivots by a distance not exceeding half the radius of the bottom of the ...

用于搅拌熔池的带有焊制喷枪头的风嘴

一种冶金或化工用的吹氧风嘴，包括一指向一冶金熔池喷枪头(1)。风嘴包括一前表面(40)和一至少由两个基本同中心轴的管子(20、30)组成的组件，所述前表面(40)由电解铜制成。所述前表面(40)与所述管子(20、30)的连接(52)由高能量焊接实施，所述喷枪头由多个喷枪头元件组成，且根据各喷枪头元件选择材料，所述诸喷枪头元件之间的连接由高能量焊接实现。

用于搅拌熔池的带有焊制喷枪头的风嘴

一种冶金或化工用的吹氧风嘴,包括一指向一冶金熔池喷枪头(1)。风嘴包括一前表面(40)和一至少由两个基本同中心轴的管子(20、30)组成的组件,所述前表面(40)由电解铜制成。所述前表面(40)与所述管子(20、30)的连接(52)由高能量焊接实施,所述喷枪头由多个喷枪头元件组成,且根据各喷枪头元件选择材料,所述诸喷枪头元件之间的连接由高能量焊接实现。

Treating method for converter slag

Lance for refining

Manufacture of ultralow-carbon steel

Refining ferroalloys

Method for reducing the amount of impurities in molten steel

Method for reducing the amount of impurities in molten steel wherein the molten steel is at least partially covered by a layer of slag and the slag layer comprises at least one component and wherein at least some of the slag layer is entrained into the molten steel and a component or components of the slag layer react with at least one type of impure element in the molten steel characterised in that at least some of the slag layer is entrained into the molten steel by means of at least one gas jet emitted from above the molten steel.

Method and system for delivering gas and granular material for melting facility

FIELD: metallurgy. SUBSTANCE: invention relates to metallurgy and can be used for loading of granular material in melting facility through a tuyere system. Device contains a metallurgic tuyere with inner bore communicated with the tuyere head and tuyere collector, inlet pipe for granular material, auxiliary pipe for gas-carrier, outer pipe with its first end freely communicated with inner barrel in the tuyere collector and its second end tightly coupled with the outer side of inlet pipe for granular material, the first part of inlet pipe is located coaxially to the outer pipe, and on the second part protruding from the external pipe there is a shut-off valve, the first end of the auxiliary pipe for carrier gas is freely connected to the outer pipe, at the second end there is at least one pressure control valve, the first end of the auxiliary pipe is located between the place of sealed joint of the external pipe with inlet pipe for granular material and the first end of said inlet pipe. EFFECT: invention allows to reduce time of heating in the process related to optimization of the rate of dissolution lime additive, service life of the tuyere head is extended, since lime will protect the head from the bath radiation. 14 cl, 10 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 598 429 C2 (51) МПК C21C 5/46 (2006.01) C21C 5/28 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ 2013153157/02, 30.04.2012 (24) Дата начала отсчета срока действия патента: 30.04.2012 Приоритет(ы): (30) Конвенционный приоритет: (72) Автор(ы): ВАЙТ, Якоб, Й. (US), ВАЛЕНТАС, Луис, С. (US), СМИТ, Тодд, Г. (US) 29.04.2011 US 61/480,982 (43) Дата публикации заявки: 10.06.2015 Бюл. № 16 R U (73) Патентообладатель(и): БЕРРИ МЕТАЛ КАМПАНИ, США (US) (45) Опубликовано: 27.09.2016 Бюл. № 27 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 29.11.2013 (86) Заявка PCT: 2 5 9 8 4 2 9 (56) Список документов, цитированных в отчете о ...

Procédé et appareil pour introduire un courant de gaz de traitement dans un bain de métal en fusion

금속및금속합금제조방법및그장치

본 발명에 따르면, 금속층및 용재층을 갖는 용융조를 포함하는 야금 용기내에서 금속 산화물로 부터 금속및 금속 합금을 제조하는 방법및 그 장치가 개시된다. 상기 방법은 캐리어 가스및 고체 탄소함유 물질및/또는 금속 산화물및/또는 다른 고체 물질이 용융조에 침투하여 용탕(鎔湯)이 상기 용융조의 표면위의 가스 공간속으로 방출되어 전이 구역이 형성될 수 있도록 상기 캐리어 가스및 고체 탄소함유 물질및/또는 금속 산화물및/또는 다른 고체 물질을 상기 용융조와 접촉및/또는 상기 용융조위로 부터 접촉하는 상기 야금 용기의 측단면부위를 통해 상기 용융조의 내부로 주입하는 것에 그 특징이 있다. 또한, 상기 방법은 상기 용융조로 부터 전이 구역속으로 방출된 반응 가스를 후연소(後燃燒)시키기 위해 산소 함유 가스를 가스 공간속으로 주입하는 것에 그 특징이 있다.

Converter control method

Refining method for molten steel controlling blowing out manganese

Explosion preventing device of converter non-combustion type exhaust gas treating apparatus

金属および金属合金を製造する方法

(57)【要約】 金属層およびスラグ層を有する溶融浴を収容する冶金容器において、金属酸化物から金属および金属合金を製造する方法および装置が開示される。この方法は、遷移領域を形成するために、固体が溶融浴を貫通して溶融浴の上方のガス空間内に溶融金属を放出させるように、搬送ガスおよび固体炭素質材料および／または金属酸化物を溶融浴に接触する前記容器の側部から、または溶融浴の上方から、溶融浴中に送入することによって特徴づけられる。また、この方法は、遷移領域内に溶融浴から放出される反応ガスを再燃焼するように酸素含有ガスをこのガス空間内に送入することによって特徴づけられる。

Method for protecting bottom refractory of bottom blown converter

Refractory of bottom blowing tuyere of converter

Method of obtaining hydrogen and carbon monoxide from hydrocarbons

Manufacturing apparatus for molten metal and method thereof

본 발명은 강의 제조 장치 및 그 방법에 관한 것으로, 정련 용기에 장입된 용선을 정련하여 강을 제조하는 방법으로서, 공기에 산소를 혼합하는 1차 산소부화 과정과; 상기 산소가 혼합된 공기를 열풍로에서 가열하여 열풍을 제조하는 과정과; 상기 열풍로에서 제조된 열풍을 상기 열풍로에 연결되는 열풍 공급배관으로 배출하는 과정과; 상기 열풍 공급배관에 산소를 공급하여 상기 열풍에 산소를 혼합하는 2차 산소부화 과정과; 상기 산소가 혼합된 열풍을 상기 열풍 공급배관에 연결되는 랜스를 통해 상기 정련 용기에 취입하는 과정;을 포함하여, 제강공정에서 발생하는 배가스량을 저감시키고, 원료를 용해시키는데 필요한 열원을 확보할 수 있다.  The present invention relates to an apparatus and a method for manufacturing steel, and a method for manufacturing steel by refining a molten iron charged in a refining vessel, comprising: a primary oxygen enrichment process for mixing oxygen with air; Heating the air mixed with oxygen in a hot air furnace to produce hot air; Discharging hot air produced in the hot air path to a hot air supply pipe connected to the hot air path; A secondary oxygen enrichment process for supplying oxygen to the hot air supply pipe to mix oxygen with the hot air; And a step of blowing the hot air mixed with the oxygen into the refining vessel through a lance connected to the hot air supply pipe, thereby reducing the amount of exhaust gas generated in the steelmaking process and securing a heat source necessary for dissolving the raw material have.

Method for intensifying the reactions in metallurgical reaction vessels

본 발명은 배스 표면의 상부 및 하부로 반응제가 공급되는 용융배스를 포함하는 야금반응용기 내의 반응을 증대시키는 방법에 관한 것으로, 금속 배스로부터 새어나온 가스는 이 가스공간으로 주입된 산화 가스에 의하여 용융물 상부의 공간에서 재연소되고, 그 결과 발생된 열은 용융 배스로 전달되며, 이것에 의하여 방울, 비말 또는 용융물의 커다란 입자의 형태로서 용융물의 파편은 상기 야금 반응 용기의 가스 공간으로 탄도 궤도를 따라서 이동하여, 하부배스 송풍관을 경유하여 유도된 가스양을 통하여 분수처럼 용융물로부터 분출된다 . The present invention relates to a method of augmenting a reaction in a metallurgical reaction vessel including a molten bath in which a reactant is supplied to the upper and lower portions of the bath surface, wherein the gas leaked from the metal bath is melted by the oxidizing gas injected into the gas space. Reburned in the upper space, and the resulting heat is transferred to the molten bath, whereby fragments of the melt in the form of droplets, droplets or large particles of the melt follow the ballistic trajectory into the gas space of the metallurgical reaction vessel. It moves and is ejected from the melt like a fountain through the amount of gas induced via the lower bath blower.

一种大型转炉喷吹工艺方法

本发明涉及一种大型转炉喷吹工艺方法，所述转炉设有喷吹系统，喷吹系统包括设于转炉顶部的旋流氧枪及设于转炉底部的水平缝式底吹元件；所述旋流氧枪、水平缝式底吹元件用于向转炉内喷入气体或弥散态的固体颗粒，固体颗粒包括CaO固体颗粒或稀土元素固体颗粒；所述旋流氧枪喷入的气体包括氧气、氩气或氮气；所述水平缝式底吹元件喷入的气体包括CO2、氩气、氮气或氧气。本发明通过设于转炉顶部的旋流氧枪及转炉底部的水平缝式底吹元件选择性地向转炉内吹入空气或固体颗粒，有利于降低废气排放，减少冶炼时间，提高化渣效果，减少石灰消耗量。

Recovering apparatus for sensible heat of cooling water in converter waste gas treating equipment

Controlling method for bottom blown gas

Steel making by pure oxygen bottom blast converter

Manufacturing apparatus for molten metal and method thereof

The present invention relates to a manufacturing apparatus for steel and a method thereof, wherein the method comprises the following steps of: preparing a scrap; putting the scrap into a refining container; inserting molten iron into the refining container; and injecting gas having hot air and oxygen with a lance provided in an upper portion of the refining container. Therefore, a heat source required for melting the scrap can be effectively secured to improve productivity.

Recovery control method of converter exhaust gas

Method for subsurface gas refining of steel

1. СПОСОБ.ПОДПОВЕРХНОСТНОГО ГАЗОВОГО РАФИНИРОВАНИЯ СТАЛИ, включавощий подачу в расплав через фурму глубинной продувки кислородсодержащего газа, содержащего до 90% газаразбавител , и введение в качестве сгорающих окисл емых добавок алюмини  при одновременном контролировании температуры расплава, отличающийс  тем, что, с целью предотвращени  выбросов, алюминий ввод т в расплав при содержании в нем углерода 0,28%. 2. Способ поп.1,отличающ и и с   тем, что до 35% алюмини  ввод т в расплав до того, как расплав обезуглерожен до содержани  углерода . СО 1. METHOD.SUBSURFACE GAS REFINING OF STEEL, including the supply of oxygen-containing gas containing up to 90% of the gas of the diluent into the melt through the lance of the deep purge of the oxygen, while controlling the temperature of the melt, which is out of the way, the sample will burn as oxidizing aluminum, while controlling the temperature of the melt which is in the free-flowing gas of the melt. The aluminum is introduced into the melt at a carbon content of 0.28%. 2. Method pop.1, distinguished by the fact that up to 35% of aluminum is introduced into the melt before the melt is decarbonated to a carbon content. WITH

Blowing method for converter

Комплекс установок для производства стали и способ эксплуатации комплекса установок

Изобретение относится к металлургии. Технический результат – повышение экономичности производства стали. Комплекс установок для производства стали содержит доменную печь для производства чугуна, конвертерную сталеплавильную установку для производства сырой стали и газопроводную систему для газов, выделяющихся при производстве чугуна и/или при производстве сырой стали. Согласно изобретению комплекс установок снабжен подключенной к газопроводной системе химической установкой или биотехнологической установкой, а также накопителем энергии для покрытия по меньшей мере части потребности электрического тока для комплекса установок. 8 н. и 19 з.п. ф-лы, 2 ил. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 670 513 C1 (51) МПК F27D 17/00 (2006.01) C21B 5/06 (2006.01) C21C 5/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК F27D 17/00 (2006.01) (21)(22) Заявка: 2016128079, 11.12.2014 (24) Дата начала отсчета срока действия патента: Дата регистрации: 23.10.2018 12.12.2013 DE 10 2013 113 950.7 (45) Опубликовано: 23.10.2018 Бюл. № 30 (73) Патентообладатель(и): ТИССЕНКРУПП АГ (DE) (85) Дата начала рассмотрения заявки PCT на национальной фазе: 12.07.2016 (56) Список документов, цитированных в отчете о поиске: EP 2657215 A1, 30.10.2013. DE 102011077819 A1, 20.12.2012. WO 2011018124 A1, 17.02.2011. RU 2353659 C2, 27.04.2009. WO 2010/136313 A1, 02.12.2010. (86) Заявка PCT: 2 6 7 0 5 1 3 R U (87) Публикация заявки PCT: WO 2015/086152 (18.06.2015) C 1 C 1 EP 2014/003318 (11.12.2014) 2 6 7 0 5 1 3 Приоритет(ы): (30) Конвенционный приоритет: R U 11.12.2014 (72) Автор(ы): АХАЦ, Райнхольд (DE), ВАГНЕР, Йенс (DE), ОЛЕС, Маркус (DE), ШМЁЛЕ, Петер (DE), КЛЯЙНШМИДТ, Ральф (DE), МАЙСНЕР, Кристоф (DE), БРЕДЕМЕЙЕР, Нильс (DE), ФЁЛЬКЛЬ, Йоханнес (DE) Адрес для переписки: 109012, Москва, ул. Ильинка, 5/2, ООО "Союзпатент" (54) КОМПЛЕКС УСТАНОВОК ДЛЯ ПРОИЗВОДСТВА СТАЛИ И СПОСОБ ЭКСПЛУАТАЦИИ КОМПЛЕКСА УСТАНОВОК (57) Реферат: Изобретение относится ...

Способ и устройство для регулирования выбросов окиси углерода электродуговой печи

Изобретение относится к металлургии. Технический результат - повышение качества регулирования и оптимизация дожигания окиси углерода. Согласно способу регулирования выбросов окиси углерода электродуговой печи определяют высоту вспененного шлака в по меньшей мере трех зонах корпуса печи на основе измерения корпусного шума и соотносят с содержанием окиси углерода в отходящем газе электродуговой печи. Ввод углерода и/или подачу кислорода в по меньшей мере одной из по меньшей мере трех зон регулируют таким образом, что высота вспененного шлака поддерживалась ниже максимального значения, коррелированного с допустимым предельным значением для окиси углерода в дожигаемом отходящем газе. 2 н. и 18 з.п. ф-лы, 5 ил. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 510 480 (13) C2 (51) МПК F27B 3/28 (2006.01) C21C 5/52 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2011133683/02, 30.07.2009 (24) Дата начала отсчета срока действия патента: 30.07.2009 (72) Автор(ы): МАЧУЛЛАТ Томас (DE), РИГЕР Детлеф (DE) (73) Патентообладатель(и): СИМЕНС АКЦИЕНГЕЗЕЛЛЬШАФТ (DE) R U Приоритет(ы): (30) Конвенционный приоритет: 03.02.2009 DE 102009007575.5 (43) Дата публикации заявки: 10.03.2013 Бюл. № 7 2 5 1 0 4 8 0 (45) Опубликовано: 27.03.2014 Бюл. № 9 (56) Список документов, цитированных в отчете о поиске: SU 1497432 A1, 30.07.1989. RU 2086873 C1, 10.08.1997. RU 2213919 C2, 10.10.2003. DE 102006050888 A1, 30.04.2008. 2 5 1 0 4 8 0 R U (86) Заявка PCT: EP 2009/059873 (30.07.2009) C 2 C 2 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 05.09.2011 (87) Публикация заявки РСТ: WO 2010/088972 (12.08.2010) Адрес для переписки: 129090, Москва, ул. Б. Спасская, 25, стр.3, ООО "Юридическая фирма Городисский и Партнеры" (54) СПОСОБ И УСТРОЙСТВО ДЛЯ РЕГУЛИРОВАНИЯ ВЫБРОСОВ ОКИСИ УГЛЕРОДА ЭЛЕКТРОДУГОВОЙ ПЕЧИ (57) Реферат: Изобретение относится к металлургии. Технический результат - повышение качества регулирования и оптимизация дожигания ...

Method for melting converter sludge in dc arc furnace

FIELD: metallurgy. SUBSTANCE: invention relates to a method for melting converter sludge in a DC arc furnace. The method includes melting, when adjustable rectified operating voltage from 20 Volts to 130 Volts is supplied from a power source with rectified DC power from 0.3 kA to 10.0 kA, the supply of which is supported by a brush short arc with a length from 0.5 to 5 mm and the movement of graphite electrodes at a speed from 10 to 15 m/min, with the creation of a direct electric field directed to the cathode, when metal contacts an anode spot of an electric arc with a current density of 2-5 KAm 2 and a specific heat flux of 10-15 kW. EFFECT: effective balance of energy saving and environmental improvement is ensured due to the reduction in harmful emissions of process gases, dust and harmful substances during the smelting of non-ferrous and ferrous metals. 1 cl, 9 dwg, 1 ex РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 766 937 C2 (51) МПК C21C 5/38 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК C21C 5/38 (2021.05) (21)(22) Заявка: 2020123192, 07.07.2020 (24) Дата начала отсчета срока действия патента: Дата регистрации: 16.03.2022 (43) Дата публикации заявки: 12.01.2022 Бюл. № 2 (45) Опубликовано: 16.03.2022 Бюл. № 8 (54) Способ плавки конверторного шлама в дуговой печи постоянного тока (57) Реферат: Изобретение относится к способу плавки направленного к катоду постоянного конверторного шлама в дуговой печи электрического поля при контакте металла с постоянного тока. Способ включает проведение анодным пятном электрической дуги с плавки при подаче от источника питания плотностью тока 2-5 кАм2 и удельным тепловым регулируемого выпрямленного рабочего потоком 10-15 кВт. Обеспечивается эффективное напряжения от 20 Вольт до 130 Вольт с силой сбалансирование энергосбережения и улучшение выпрямленного постоянного тока от 0,3 кА до экологии за счет сокращения вредных выбросов 10,0 кА, подачу которого поддерживают ...

Converter steelmaking method

MANUFACTURING OF NONCORROSIVE STEEL OF FERRITIC STEEL GROUP AISI 4xx IN CONVERTER AKP

FIELD: metallurgy. ^ SUBSTANCE: invention relates to metallurgy field. Particularly it relates to the method of noncorrosive steel manufacturing from the group of ferrite steel AISI 4xx on the basis of liquid cast iron and solid materials with ferrochromium. Method includes feeding into converter liquid cast iron without slag, its heating till the level preliminary 1150C, slag flushing and following finishing of metal while insufflations of oxygen of corresponding intensity for preventing of metal discharge from the converter, melt decarbonisation with high-performance oxygen insufflations from the top. Then it is implemented deoxidisation, final correction and finishing of treated steel melt in ladle. ^ EFFECT: providing of efficient production by means of process control and minimisation of deoxidiser consumption. ^ 8 cl, 5 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 353 663 (13) C2 (51) МПК C21C 5/28 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21), (22) Заявка: 2007118927/02, 11.11.2005 (24) Дата начала отсчета срока действия патента: 11.11.2005 (73) Патентообладатель(и): СМС ДЕМАГ АГ (DE) R U (30) Конвенционный приоритет: 14.07.2005 DE 102005032929.2 (72) Автор(ы): РАЙХЕЛЬ Йоханн (DE) (43) Дата публикации заявки: 27.11.2008 2 3 5 3 6 6 3 (45) Опубликовано: 27.04.2009 Бюл. № 12 (56) Список документов, цитированных в отчете о поиске: JP 57060012 А, 10.04.1982. GB 1430375 А, 31.03.1976. RU 2103379 C1, 27.01.1998. RU 2066689 C1, 20.09.1996. SU 467115 A1, 15.04.1975. 2 3 5 3 6 6 3 R U (86) Заявка PCT: EP 2005/012081 (11.11.2005) C 2 C 2 (85) Дата перевода заявки PCT на национальную фазу: 21.05.2007 (87) Публикация PCT: WO 2006/050963 (18.05.2006) Адрес для переписки: 129090, Москва, ул. Б.Спасская, 25, стр.3, ООО "Юридическая фирма Городисский и Партнеры", пат.пов. А.В.Мицу (54) ИЗГОТОВЛЕНИЕ НЕРЖАВЕЮЩЕЙ СТАЛИ ГРУППЫ ФЕРРИТНЫХ СТАЛЕЙ AISI 4xx В КОНВЕРТЕРЕ АКР (57) Реферат: Изобретение ...

Nozzle with a welded lance head for melt agitation

야금학적 용해체로 지향하기 위한 산소 랜스 헤드(1)를 포항하고 있는 야금학 또는 화학적 산소 노즐에 관한 것이다. 상기 노즐은 전면부(40)와 2개 이상의 거의 동심을 이루는 관(20, 30)으로 이루어진 어셈블리를 포함하고 있고, 상기 전면부(40)는 전기동으로 제조된다. 상기 전면부(40)는 고에너지 용접에 의해서 상기 관들(20, 30)에 결합되고, 상기 헤드는 각각의 헤드 구성 요소에 적합하게 명확히 선택되어 있는 재료로 이루어져 있는 다수의 헤드 구성 요소로 제조되어 있으며, 상기 헤드 구성 요소들은 고에너지 용접에 의해서 일체로 결합되어 있다. A metallurgical or chemical oxygen nozzle containing an oxygen lance head 1 for directing to a metallurgical melt. The nozzle comprises an assembly consisting of two or more substantially concentric tubes 20, 30 with the front part 40, the front part 40 being made of electrophoresis. The front portion 40 is joined to the tubes 20 and 30 by high energy welding, and the head is made of a plurality of head components made of a material that is clearly selected for each head component. The head components are integrally joined by high energy welding.

Tuyere for blowing gases into molten metal bath container

A blowing tuyere to be embedded in a bottom of side wall of a molten metal bath container for blowing a gas thereinto, the tuyere including a cylindrical core body fixedly located at the center of the tuyere and an outer tube fixed concentrically around the core body with a gap of a predetermined width to form an annular blowing passage therebetween.