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| Number | Title | Issue Date |
| 6916357 | Method for introducing a granular ore into a roasting kiln Granular ore or ore concentrate is charged into a furnace for calcining the ore at temperatures of 400 to 1050° C., the ore forming a stationary fluidized bed in the furnace. The ore is thrown onto the fluidized bed through an opening in the furnace housing dispose... | 07/12/2005 |
| 5674310 | Method and apparatus for feeding reaction gas and solids The invention relates to a method and apparatus for feeding reaction gas and solids into a suspension smelting furnace, which apparatus comprises at least conduits for receiving reaction gas and solids and for further conducting them into a suspension sme... | 10/07/1997 |
| 5472478 | Reduction of metal oxides and vessel A method of reducing metal oxides in a vessel containing a molten bath, the bath comprising a metal layer and a slag layer, wherein metal oxides and carbonaceous material are introduced into the bath, gas is injected into the slag layer to case the erupti... | 12/05/1995 |
| 5443620 | Method for oxidizing pulverous fuel with two gases having different oxygen contents A method for oxidizing the pulverous fuel of a furnace, advantageously a flash smelting furnace, by means of a burner, so that the oxidation takes place mainly owing to an effective mixing of two different combustion gases, pulverous fuel and possibly an ... | 08/22/1995 |
| 5421857 | Method for obtaining metals, their compounds, and alloys from mineral raw materials In this method for obtaining metals, their compounds, and alloys from mineral raw materials a burden is prepared by mixing a comminuted raw material with additions of chemical elements taken from the chemical composition of the starting raw material, oxid... | 06/06/1995 |
| 5374299 | Pyrometallurgical process for treating a feed material A process of pyrometallurgically treating a feed material such as a sulphide ore or concentrate is provided. The process includes the steps of: (a) producing a liquid body of feed material; (b) creating a first reaction zone and a second reaction zone which is... | 12/20/1994 |
| 5362032 | Apparatus for feeding gases into a smelting furnace The present invention relates to a method and apparatus for feeding reaction gases, advantageously oxygen and air or a mixture thereof, into a smelting furnace so that the cross-sectional area wherethrough the reaction gases are fed can be adjusted. Thus ... | 11/08/1994 |
| 5316565 | Carbothermic reduction product gas treatment Method and apparatus for reducing the quantity of carbon dioxide emitted to the atmosphere from carbothermic processes producing metals are described. The method involves rejecting carbon from the process system or using carbon as a reagent to be recycled... | 05/31/1994 |
| 5282883 | Method and apparatus for the high-temperature treatment of fine-grained solids in a melting cyclone A method and apparatus for high temperature treatment of particulate metal ore concentrate solids with a cyclone having a tangentially positioned burner directing a jet flame into the cyclone, an ore injecting nozzle positioned to inject a stream of ore w... | 02/01/1994 |
| 5246482 | Molten metal producing and refining method The disclosure relates to a molten metal producing and refining method which does not damage the apparatus, realizes a stable and high second combustion rate, and is capable of effectively recovering heat generated by the second combustion. The method com... | 09/21/1993 |
| 5201940 | Pre-heating and pre-reduction of a metal oxide The specification discloses a process for pre-heating and pre-reducing metal oxide ores. The process comprises introducing particles of an oxide ore entrained in a gas through a port into a treatment chamber. Inside the treatment chamber teh stream of ent... | 04/13/1993 |
| 5183495 | Method for controlling a flow rate of gas for prereducing ore and apparatus therefor A method for controlling a flow rate of gas for prereducing ore comprises the steps of prereducing ore in a prereduction furnace having a fluidized bed with a gas generated in a smelting reduction furnace and controlling a pressure of gas generated in the... | 02/02/1993 |
| 5149363 | Process for smelting or melting ferrous or non-ferrous metal from self-reducing agglomerates or metal Process and apparatus for producing ferrous or non-ferrous metals from a charge formed by self-reducing agglomerates (comprising pulverized ores, carbonaceous material plus a binder) consisting the apparatus of a shaft furnace, comprising a cylindrical or... | 09/22/1992 |
| 5133801 | Method and apparatus for feeding reacting substances into a smelting furnace The invention relates to a method and apparatus for feeding reaction substances, i.e. pulverous solid material and reaction gas, into a smelting furnace, particularly into the top part of the reaction space (1) of a smelting furnace. The reaction gas is f... | 07/28/1992 |
| 5013355 | Method and apparatus for producing matte and/or metal Method and apparatus for producing matte and/or metal from sulphidic fine-grained ore or ore concentrate. The ore or ore concentrate is smelted in a flame chamber in such a way that at least part of the solid material in the flame chamber melts and flows ... | 05/07/1991 |
| 4975116 | Method for production of metals of ferroalloys by direct reduction The present invention relates to a method for production of metals and/or ferro alloys by prereduction of particulate metal oxide co-current with a reducing gas. Reducing gas having a temperature between 650° and 1100° C. and metal oxide particles are s... | 12/04/1990 |
| 4957551 | Method for treatment of dust recovered from off gases in metallurgical processes The method for treating the dust entails the following steps: (a) supplying a combination of dust, a reducing agent and flux to a gastight electrothermic smelting furnace, (b) smelting, reducing and volatilizing certain metals in the smelting furnace, (c) tapp... | 09/18/1990 |
| 4895595 | Direct smelting process for non-ferrous metal sulfide ores Smelting is effected in a reactor containing juxtaposed oxidizing and reducing zones. The slag baths in the two zones communicate with each other. The slag baths of the two zones communicate with each other, the materials are charged into the slag bath in... | 01/23/1990 |
| 4740240 | Smelting process for recovering metals from fine-grained non-ferrous metal sulfide ores or concentrates In the smelting process of recovering metal from non-ferrous metal oxide ores or concentrates and/or from fine-grained non-ferrous metal sulfide ores or concentrates, particularly from non-ferrous heavy metal sulfide ores or concentrates, any sulfide ores... | 04/26/1988 |
| 4678480 | Process for producing and using syngas and recovering methane enricher gas therefrom A process for producing a synthesis gas containing methane and using a reactor having a fuel containing carbon comprises directing gasification gases in a circulation system through a bed of fuel containing carbon to form a synthesis gas containing methan... | 07/07/1987 |
| 4556421 | Method of operating a synthesis gas-ore reduction process A method of operating a cyclic synthesis gas-ore reduction process comprising supplying a carbonaceous material and preheated oxygen to a synthesis gas reactor to produce a hot synthesis gas, partially cooling said hot synthesis gas by directly passing th... | 12/03/1985 |
| 4545800 | Submerged oxygen-hydrogen combustion melting of glass Molten material is heated by submerged combustion of hydrogen with oxygen so that the product of combustion injected into the melt is low in volume and consists essentially of water vapor which is relatively soluble in a material such as molten glass. Pre... | 10/08/1985 |
| 4519837 | Metal powders and processes for production from oxides Method of forming metal powders from the liquid metal reduction of metal oxides are described. The methods described include the steps of low temperature liquid metal reduction of the oxide, agitation of the reduction reaction mixture and/or distillation ... | 05/28/1985 |
| 4473399 | Method of supplying coal gas to a smelting works A coal gas supply method converts a carbon carrier in a reactor into a coal gas by the addition of oxygen and feeds the coal gas to fuel consumers. To ensure a continuous fuel supply to the fuel consumers during the coal gasification process, a branch cur... | 09/25/1984 |
| 4422624 | Concentrate burner A burner for smelting metal-bearing sulfide ores or concentrates by means of an oxygen-rich gas is disclosed. The oxygen-rich gas is introduced into a chamber so as to aspirate or eject the metal-bearing sulfide ore or concentrate. The oxygen-rich gas and... | 12/27/1983 |
| 4419127 | Metallothermal process for reducing metal oxides In order to produce metals or ferroalloys, a mixture of metal oxides, reducing agents and possibly iron is ignited, to produce a metal melt as well as a slag melt. After the burn-out the still liquid slag is reacted with a suitable means, preferably calci... | 12/06/1983 |
| 4380469 | Process and apparatus for continuously reducing and melting metal oxides and/or pre-reduced metallic materials For continuously reducing and melting metal oxides and, respectively, metallic materials pre-reduced to a large extent, fuels are completely burned within a melting receptacle. The melting receptacle (8) is tightly passing at its upper side into at least ... | 04/19/1983 |
| 4375983 | Method of making sponge metal A method for the batchwise reduction of iron ore to sponge iron in a multiple unit reactor system is disclosed in which (a) separate fixed beds of iron-bearing material are simultaneously treated in at least one cooling reactor and at least two reduction ... | 03/08/1983 |
| 4358311 | Method and apparatus for the smelting of material such as ore concentrates A method and apparatus for smelting an ore concentrate or the like wherein the concentrate is first melted in an oxidizing atmosphere and the smelt is aftertreated with reducing gases to recover the metal values. The improvement consists in positioning a ... | 11/09/1982 |
| 4337086 | Method for decreasing metal losses in nonferrous smelting operations A process for producing a metal matte from a nonferrous metal-containing sulfide mineral concentrate in a horizontally disposed furnace wherein small sulfide particles are separated from the concentrate, compacted and introduced into the furnace along wit... | 06/29/1982 |
| 4220469 | Method for producing reduction gases consisting essentially of carbon monoxide and hydrogen A single heat method of producing reduction gases which consist essentially of carbon monoxide and hydrogen for ore-reducing processes, comprises, directing a coal and water suspension into a reactor to generate combustion gases under pressure having a te... | 09/02/1980 |
| 4210315 | Means for producing a suspension of a powdery substance and a reaction gas A suspension of a powdery substance and a reaction gas is formed by allowing the powdery substance to fall as an annular flow into a reaction space, feeding the reaction gas downwardly to encircle the annular flow of powdery substance, the kinetic energy ... | 07/01/1980 |
| 4159201 | Process for producing a carbon monoxide-rich gas A carbon monoxide-rich gas of a carbon monoxide concentration of at least 98% by volume is produced by [a] generating a hydrogen and carbon monoxide-containing crude gas by gasification of a finely divided solid fuel, including dust-like fuel, with oxygen... | 06/26/1979 |
| 4152139 | Method for cooling sponge metal The cooling of sponge iron produced in a multiple reactor unit batch system for reducing iron ore is enhanced by using an extended cooling cycle wherein the reactor previously isolated at the end of a cycle for discharge and recharging in prior art system... | 05/01/1979 |
| 4094667 | Melting of fine particulate material in a high-speed rotary furnace Finely divided particulate material is discharged against the incandescent wall of a rotary furnace through a pipe extending into the open end of the furnace in a position where the material is out of the path of the flame projected into the furnace throu... | 06/13/1978 |
| 4067728 | Method for gaseous reduction of metal ores An improvement in a method for the batchwise gaseous reduction of iron ore to sponge iron in a multiple unit reactor system including a cooling reactor and a series of reduction reactors. Reduction is effected with a gas composed largely of carbon monoxid... | 01/10/1978 |
| 4046556 | Direct gaseous reduction of oxidic metal ores with dual temperature cooling of the reduced product A process for the direct gaseous reduction of iron ore to sponge iron wherein the sponge iron is cooled with a carbon-containing cooling gas by a dual temperature procedure that increases transfer of carbon from the cooling gas to the sponge iron and ther... | 09/06/1977 |
