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| Number | Title | Issue Date |
| 7727304 | Smelting process for the production of iron A process for producing iron metal and slag by smelting iron-containing source material, having iron present as oxide and/or a partially metalized state, in a reactor containing a molten bath comprising or having a slag phase, utilises injection of fuel/reductant an... | 06/01/2010 |
| 6939391 | Direct smelting process and apparatus A molten bath-based direct smelting process for producing ferrous metal from a ferrous feed material is disclosed. The process is characterised by injecting pro-heated air downwardly into metallurgical vessel at an angle of 20 to 90° C. relative to a horizontal axi... | 09/06/2005 |
| 6328784 | Method of desulfurizing molten iron alloy A process for desulfurizing a molten iron alloy in which a desulfurizing agent is applied to the molten iron alloy under agitation. Concurrently, a gas containing a hydrocarbon gas is blown onto the bath surface of the molten iron alloy, or a substance ge... | 12/11/2001 |
| 6241806 | Recovering vanadium from petroleum coke as dust A continuous process for recovering vanadium values from petroleum coke is disclosed. A vanadium containing coke is charged to a molten metal bath to which oxygen containing gas is added in an amount sufficient to heat balance the process and produce off ... | 06/05/2001 |
| 6231640 | Dissolving petroleum coke in molten iron to recover vanadium metal A process for the recovery of vanadium from a petroleum coke or heavy hydrocarbon feed comprising dissolving the feed in a molten metal bath to which oxygen containing gas is added to maintain heat balance and bum off carbon. Preferably the feed is added ... | 05/15/2001 |
| 6106587 | Process for separating tin as well as, if required, copper from scrap melts, in particular, tinplate melts or metallic melts In a process for separating tin as well as, if required, copper from scrap melts, in particular, tinplate melts or metallic melts as formed in the working up of waste or metal-oxide-containing combustion residues, the carbon content of the melt is adjuste... | 08/22/2000 |
| 5931985 | Process and device for blowing oxygen-containing gas with and without solid material on a metal melt in a metallurgical vessel A process for blowing oxygen-containing gas, with and without solid material, on a metal melt in a metallurgical vessel, a process for generating a burner flame and corresponding devices. The inventive process and lance suitable for such process provides,... | 08/03/1999 |
| 5743938 | Method of decarburizing refining molten steel containing Cr A method of decarburizing refining molten steel containing Cr in such a manner that oxygen gas, inert gas or a mixture of inert gas and oxygen gas is blown to the surface of bath of molten steel containing Cr in a refining chamber and to a position below ... | 04/28/1998 |
| 5366539 | Process for the desulphurization treatment of pig iron melts The invention relates to a process for the desulphurization treatment of a pig iron melt in a container. The characterizing feature of the invention is that the treatment is performed in three phases: In the initial phase such solids are injected that deoxidiz... | 11/22/1994 |
| 5135572 | Method for in-bath smelting reduction of metals A method of in-bath smelting reduction comprises the step of selectively supplying powder materials into a gas upflow region or a gas downflow region within a furnace during the time that oxygen-containing gas is concurrently being blown into the furnace ... | 08/04/1992 |
| 5084093 | Method for manufacturing molten pig iron A method for manufacturing molten pig iron is disclosed which comprises: forming a packed bed of coke in a vertical furnace having a charging port in an upper portion thereof for charging raw materials and discharging gases, one or more primary tuyeres in its ... | 01/28/1992 |
| 5078785 | Method of operating in-bath smelting reduction furnace A method of operating an in-bath smelting reduction furnace comprises the step of forming a slag zone in an in-bath smelting reduction furnace supplied with oxygen through a top lance and with agitation gas by bottom bubbling through tuyeres below the met... | 01/07/1992 |
| 5049357 | Method for manufacturing iron-boron-silicon alloy A method for economically manufacturing an iron-boron-silicon alloy through simple steps, which comprises the steps of: adding a boron raw material and a carbonaceous reducing agent to a molten iron received in a vessel; blowing oxygen gas into the molten... | 09/17/1991 |
| 4957546 | Direct steelmaking process from 100% solid charge of multiple reducing and oxidizing alternating periods The present invention relates to a new steelmaking process and apparatus which operates on an intermittent basis where several cycles composed of reducing and oxidizing periods are performed to create sufficient energy for melting of solid metallic charge... | 09/18/1990 |
| 4957545 | Smelting reduction process using reducing gas generated in precombustor Described herein is a smelting reduction process for smelting and reducing an iron oxide material by introducing same into a smelting reduction furnace together with a solid carbonaceous material, a fluxing agent and an oxygen-containing gas, process comp... | 09/18/1990 |
| 4933006 | Method for the batch production of steel in an oxygen steel converter with scrap input In a batch production of steel, a charge including solid scrap is loaded into an oxygen steel converter, the scrap is melted and the charge is refined in the converter by means of an oxygen blowing lance inserted into the converter through the converter m... | 06/12/1990 |
| 4919714 | Method and apparatus for refining steel Disclosed are an improved method of refining steel and an apparatus for practicing the method. The refining method comprises, basically, carrying out the refining, particularly, decarburization, while stirring molten steel in the refining furnace by injec... | 04/24/1990 |
| 4919713 | Process for producing chromium containing molten iron A process of production of chromium containing molten iron generally comprises two steps. In a first step, top and bottom-blown reduction for reducing chromium is performed with charging carbon containing material and slag forming agent from the top of a ... | 04/24/1990 |
| 4891064 | Method of melting cold material including iron A method of melting an iron-containing cold material and simultaneously obtaining a low phosphorous and high carbon molten iron while maintaining a high post combustion rate, comprising the steps of: preparing a converter having a lance for top-blowing ox... | 01/02/1990 |
| 4832739 | Process for desulfurizing molten iron A process for desulfurizing molten iron using a fine-grain agent consisting essentially of industrial calcium carbide, a dried coal, the coal containing at least 15% by weight of volatile components, and fine-grained magnesium and which agent is injected ... | 05/23/1989 |
| 4822411 | Integrated steel mill arrangement When operating mills including a coling plant, a blast furnace arrangement and a converter steelworks, large amounts of partially high-grade so-called cupola gases, such as coke oven gas and converter exhaust gases, form, which cupola gases, so far. In or... | 04/18/1989 |
| 4818281 | Method of melting in an oxygen converter A method of melting steel in an oxygen converter from solid metal iron-bearing materials includes the steps of loading these materials and their subsequent heating up to their melting through burning hydrocarbon and solid carbon-containing fuels in an oxy... | 04/04/1989 |
| 4792352 | Method for manufacturing steel through smelting reduction A method for manufacturing molten steel wherein iron ore and coal are continuously supplied onto molten metal containing carbon of 1% or less while blowing oxygen gas is being introduced onto the molten metal through a lance. Simultaneously with this oper... | 12/20/1988 |
| 4783219 | Method for melting and reducing chrome ore A method for melting and reducing chrome ore, which comprises charging chrome ore and carbonaceous material, and blowing in oxygen gas under a pressure ranging from 1 to 600 Torr, while molten metal is being stirred by a stirring gas blown in. In this met... | 11/08/1988 |
| 4708736 | Method of producing molten pig iron or steel pre-products from particulate ferrous material In a method of producing molten pig iron or steel pre-products from particulate ferrous material, as well as of producing reduction gas in a melt-down gasifier by adding coal and by blowing in oxygen-containing gas by means of nozzle pipes penetrating the... | 11/24/1987 |
| 4701216 | Melting of metals The invention provides a method of melting and superheating ferrous material comprising the steps of charging a vessel with ferrous material and injecting into the vessel coal and oxygen in such ratios as to combust the coal to provide adequate heat for t... | 10/20/1987 |
| 4605437 | Reactor iron making Method of reactor iron making without using electric power in the reactor. Iron scrap and a solid non-petroleum carbonaceous material, i.e., powdery coal or coke, are continuously charged from above into molten iron in the reactor with a space over the mo... | 08/12/1986 |
| 4601749 | Method for adjusting chemical composition of molten pig iron tapped from blast furnace At least one lance is substantially vertically arranged above a hot-metal runner of a blast furnace so that the lowermost end of the lance is spaced apart by a prescribed distance from the surface of molten pig iron flowing through the hot-metal runner. A... | 07/22/1986 |
| 4591381 | Process of producing pig iron from iron ore concentrate A process for producing pig iron from iron ore concentrate, in a reactor vessel into which iron ore concentrate, coal, oxygen gas and slag formers are injected beneath the surface of a molten iron bath. According to the invention, the ratio CO2... | 05/27/1986 |
| 4585476 | Method for producing liquid steel from iron ore Improved method for producing steel with the combination of a basic oxygen furnace and a sponge iron plant. The sponge iron produced with a high carbon content, is loaded into the basic oxygen furnace in which oxygen and any type of powder carbon are inje... | 04/29/1986 |
| 4579588 | Method for the production of liquid iron from iron oxide Method and apparatus for producing liquid iron from iron oxide, wherein the iron oxide is substantially converted to sponge iron by passing reducing gas through it in a reduction column and is then melted in a melt vessel which is in open communication wi... | 04/01/1986 |
| 4564388 | Method for continuous steelmaking A method for the continuous operation of an electric steelmaking furnace, including preheating charge materials, charging and tapping while maintaining full electric power, and having good control over both quality and product chemistry.... | 01/14/1986 |
| 4561637 | Process and apparatus for heating a steel bath charged with scrap A process and apparatus for heating a steel bath charged with scrap which efficiently utilizes converter waste gas to supplement external energy sources is presented.... | 12/31/1985 |
| 4561886 | Method of heating, melting and coal conversion and apparatus for the same A method of and an apparatus for heating, melting and production of gaseous fuel include supplying air, coal, steam into a melt. The melt contains elements readily oxidized by air. These elements produce oxides readily reduced by carbon. The overall resul... | 12/31/1985 |
| 4555267 | Process for making fuel from solid metallic iron-bearing materials In the process for making steel from scrap, in each converter cycle following the charging of scrap, an amount of hot metal charge originating from a preceding converter cycle is charged over the scrap. The total charge is melted down through the introduc... | 11/26/1985 |
| 4543125 | Process of making steel in converter using a great amount of iron-bearing cold material A process for producing a steel in at least two converters using a great or substantial amount of an iron-bearing cold material. The iron-bearing cold material and a carbonaceous material are supplied into one of the converters under the presence of a mol... | 09/24/1985 |
| 4540432 | Continuous process of melting sponge iron The melting operation is carried out in an elongated horizontal reactor, in which sponge iron is charged onto the molten material in an intermediate region of the reactor, carbonaceous fuel and high-oxygen gases are blown into the molten material and slag... | 09/10/1985 |
| 4537629 | Method for obtaining high purity ductile iron A method for making high quality liquid iron with substantially no residual chemical elements and a controlled content of carbon, manganese, phosphorous, sulfur and silicon in the final metal. Sponge iron, as raw material, is melted in a vessel or convert... | 08/27/1985 |
| 4525209 | Process for producing low P chromium-containing steel A process for producing a low P chromium-containing steel in an AOD vessel from a high P chromium-containing molten pig iron comprising a first stage of recarborization, desiliconzation and temperature raising, a second stage of dephosphorization with sla... | 06/25/1985 |
| 4522650 | Process for production of low phosphorus alloy Herein is disclosed a process for producing an alloy of low phosphorus content by means of a furnace equipped with a lance for injection. The process is characterized by producing an alloy of low phosphorus content and at the same time by gasifying the ca... | 06/11/1985 |
