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| Number | Title | Issue Date |
| 7238222 | Thermal synthesis production of steel A process for producing liquid steel is disclosed. Carbon monoxide and oxygen may be combusted in a high temperature reactor. Iron and iron oxide materials, along with scrap steel if desired, may be placed in the high temperature reactor. Carbon dioxide produced in ... | 07/03/2007 |
| 6228137 | Process for producing a foaming slag above a stainless steel melted in an electric furnace A process for producing a foaming slag above a stainless steel melted in an electric furnace, in which: a powder containing at least one metal oxide and carbon in its composition is introduced into the slag, at least one oxide present in the powder is reduced ... | 05/08/2001 |
| 5651807 | Method for treatment of residues from organochlorosilane and/or chlorosilansynthesis The present invention relates to method for treatment of residues originating from organochlorosilanes- and/or chlorosilane syntheses. The residues are, optionally together with an oxidation agent, supplied to a smelting furnace where the residues are mel... | 07/29/1997 |
| 5441578 | Method for producing soft magnetic alloys with very high permeability and alloys resulting therefrom Method for producing soft magnetic alloys with very high permeability, in which an ingot is cast containing in its composition more than 70% nickel or more than 45% cobalt, the metal having, or not having, been subjected to a secondary metallurgical step,... | 08/15/1995 |
| 5264020 | Smelting plant with two melting furnaces arranged in juxtaposed relationship In a smelting plant including two melting furnaces which are arranged in juxtaposed relationship and which are operated alternately, wherein the furnace gases which are produced in the melting process are respectively introduced into the other melting fur... | 11/23/1993 |
| 5198019 | Manufacture of iron and steel in a duplex smelter and solid state oxide suspension prereducer Prereduced iron oxides are supplied to a smelting vessel (1) for the production of iron or steel by directing a hot reducing offgas from the vessel (1) into a vertical riser duct (8) without substantial cooling of the offgas and by way of inlet (16), part... | 03/30/1993 |
| 5167699 | Process and installation for producing molten steel of scrap There is disclosed a process for the production of molten steel or steel pre-products from scrap contaminated with combustible waste-like substances and heated and melted in a metallurgical meltdown vessel. In order to be able to dispose of the forming no... | 12/01/1992 |
| 4950331 | Ceramic flux for welding low-alloy steels A ceramic flux for welding low-alloy steels contains calcined magnesite, synthetic slag containing two thirds of CaF2 and one third of Al2 O3, a component containing at least 95% of Al2 O3 in the alph... | 08/21/1990 |
| 4865643 | Smelting process for making elemental silicon and alloys thereof, and apparatus therefor A smelting process for making elemental silicon and alloys thereof is disclosed. The smelting process is of the electrometallurgical type for producing elemental silicon from silicon dioxide including silicon alloyed and silicon in a substantially pure fo... | 09/12/1989 |
| 4159904 | Process for extracting bismuth from a bismuth-bearing material A process for the pyrometallurgical extraction of bismuth from a bismuth-bearing material (e.g., ores and concentrates of bismuth in the roasted or unroasted states), in an electric furnace with submerged electrodes in which the sulphur content of the cha... | 07/03/1979 |
| 4135912 | Electric smelting of lead sulphate residues A process for treatment of lead residues, without prior sintering, in which residues more than 70% of the lead is present as lead sulphates, comprising addition of the said residues, together with a reductant containing carbon and together with fluxes tha... | 01/23/1979 |
| 4113468 | Continuous smelting method A method is provided for producing steel with a very low carbon content of as low as 0.015% by continuously maintaining a foaming slag layer at a particular volume, and using as the charge a pre-reduced sponge with a specified carbon/oxygen ratio. The pro... | 09/12/1978 |
| 4053302 | Synthetic fluorspar for conditioning electric furnace slags A calcium fluoride-containing composition for use in conditioning electric furnace steelmaking slags is prepared from by-product scrubber solutions derived from wet-acid processing of phosphate rock by reacting the scrubber solution with calcium hydroxide... | 10/11/1977 |
| 3954446 | Method of producing high duty cast iron A refining means for obtaining high duty spheroidal graphite cast iron through heating molten pig iron in an arc furnace to above the decomposition temperature of silicon oxide in the presence of carbon, such as 1500°C, whereupon a refining agent contain... | 05/04/1976 |
| 3953195 | Method of refining carbon-unsaturated system ferro-chromium Refining with the requirements that a mixing rate of powder ore to lump ore is prepared in the range of 20 to 50%, the amount of SiO2 in the charging raw materials is readjusted to which the amount of SiO2 in the slag is in the range... | 04/27/1976 |
