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7993130 |
Method of combustion with the aid of burners in industrial furnaces, and a burner to this end
Method of combustion with a gas burner having a burner head at one end of an inner gas pipe surrounded by an outer protective pipe, wherein gases from the burner head flow inside the inner pipe and...
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7785389 |
Feed material composition and handling in a channel induction furnace
A method of operating a channel induction furnace to process a feed material and obtain therefrom at least one of a molten metal product, a vapor phase metal product and a slag product. The method...
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7776126 |
Processing parameters for operation of a channel induction furnace
A method of operating a channel induction furnace to process a feed material and obtain therefrom at least one of a molten metal product, a vapor phase metal product and a slag product. The method...
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7727302 |
Slag control in a channel induction furnace
A method of operating a channel induction furnace to process a feed material and obtain therefrom at least one of a molten metal product, a vapor phase metal product and a slag product. The method...
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6849101 |
Method using selected carbons to react with Al2O and Al vapors in the carbothermic production of aluminum
In a method for recovering Al from an off-gas (3,4) produced during carbothermic reduction of aluminum utilizing at least one smelter (1,2), the off-gas (3,4) is directed to an enclosed reactor (5)...
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6562101 |
Processing electric arc furnace dust through a basic oxygen furnace
Methods and apparatus for processing electric arc furnace (“EAF”) dust through a basic oxygen furnace (BOF) to recover iron value from the EAF dust and concentrate zinc from the EAF dust into a mat...
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6530970 |
Method for recovering aluminum vapor and aluminum suboxide from off-gases during production of aluminum by carbothermic reduction of alumina
A method for aluminum recovery during the carbothermic production of aluminum in a smelting furnace (1,2) is disclosed, where during carbothermic reduction of alumina, aluminum and aluminum...
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6372009 |
Method for reducing CO and VOC's in steelmaking furnace off-gas stream without forming or exhausting undesirable products
A process and apparatus for continuously reducing carbon monoxide (CO), uncombined free hydrogen (H2) and volatile hydrocarbons (VOC's) in molten metal refining vessel off-gases without forming...
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6206948 |
Metal reduction and melting process and apparatus
A metal reduction and melting process which involves the heating of a burden comprising a metal containing component and a carbon containing component in a channel type induction furnace in order...
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6136063 |
Process for separating hazardous metals from waste materials during vitrification
A process and system for separating metals from a waste composition and for producing a reusable glass product is disclosed. The process includes heating waste materials containing at least one...
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5999556 |
Electric arc furnace that uses post combustion
An electric arc furnace comprises a closed melting vessel and includes means for charging metal to be molten into the melting vessel. At least one electrode extends into the melting vessel and...
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5487081 |
Process and apparatus for the treatment of the waste gases of an arc furnace
A process is provided for the treatment of waste gases, dust and vapor from a closed arc furnace disposed in a furnace vessel. The furnace vessel contains a charge column, a metal melt and slag...
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5413621 |
Process for cooling and purifying hot, dust-laden flue gases containing dioxins and other toxic substances
The present invention pertains to a process for cooling and purifying hot, dust-laden flue gases enriched with dioxins and other toxic components from a melting vessel, e.g., an arc furnace.Both...
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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...
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5174982 |
Control of carbon balance in a silicon smelting furnace
The present invention is a process for the carbothermic reduction of silicon dioxide to form elemental silicon. Carbon balance of the process is assessed by measuring the amount of carbon monoxide...
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5074906 |
Method and installation for recovering energy in metallurgical processes
A method and an installation for recovering energy in the thermal destruction of pollutants in a gas emitted from a scrap preheating device (6,8), e.g. in an electro-steel furnace (1). The polluted...
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5009703 |
Silicon smelting process in direct current furnace
The instant invention is a process for preparing silicon metal in a direct current, submerged-arc furnace. The process comprises adding a source of silicon dioxide and a source of carbon to a...
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5004496 |
Method and apparatus 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...
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4702902 |
Handling of by-product gases from a silicon furnace
What is disclosed is an improvement in a process for the carbothermic reduction of silicon dioxide to form silicon, the improvement comprising (a) contacting the by-produced gases from the silicon...
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RE32247 |
Process for the direct production of steel
A process for the direct production of steel from particulate iron oxides or concentrates including two major steps in which in Step (1) the iron oxides are converted to iron carbide and in Step...
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4455165 |
Increasing blast temperature
In a method of utilizing a plasma generator to increase the blast temperature in a shaft furnace for melting and possible reduction of metals and/or metal oxides, the thermal energy produced in the...
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4450003 |
Process and apparatus for the recovery of combustible gases in an electrometallurgy furnace
The invention concerns a process for the recovery of combustible gases in an electrometallurgy furnace comprising an external metal casing (1) and an internal refractory lining (2), in which at...
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4395280 |
Preheating process for steel-making materials
A preheating process for steel-making materials, in which the steel-making materials are preheated in a preheating furnace and transferred to a bucket in a clean state for charging them into the...
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4261736 |
Carbothermic production of aluminium
In a process for the treatment of fume-laden carbon monoxide evolved in carbothermic reduction of alumina the fume-laden gas is contacted with particulate carbon in a fluidized bed maintained at a...
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4224059 |
Carbothermic production of aluminium
In a process for production of aluminium metal described in U.S. Pat. No. 4,099,959 carbon monoxide gas is evolved at very high temperature through reaction of aluminium carbide and alumina in a...
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4119454 |
Smelting method
An improved method is provided for smelting steel from scrap in an electric arc furnace which reduces energy consumption, reduces operating noise, and improves the product quality in relation to...
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4111687 |
Process for the production of intermediate hot metal
A process and apparatus for the production of intermediate hot metal suitable for further refining into steel is disclosed.The basic process includes the steps of heating a charge of ore in a...
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4087274 |
Method of producing a partially reduced product from finely-divided metal sulphides
There is provided a method of producing a partially reduced product from finely divided metal oxide containing material. The product is suited for continued reduction and the material containing...
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4076954 |
Method and an electrically heated device for producing molten metal from powders or lumps of metal oxides
This invention is related to a method and a process for producing metals by reducing and smelting metal oxides in two steps, the first of said steps comprising prereduction of a metal oxide charge....
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4072502 |
Method apparatus for increasing blast gas temperature in a shaft furnace
A method and apparatus for increasing blast gas temperature in a shaft furnace by passing at least part of the blast gas through a plasma burner, and also supplying additional fuel to the furnace...
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4061492 |
Method of ore reduction with an arc heater
A two-stage process for converting metal-bearing ore to a metal or an alloy characterized by the steps of, first, partially reducing an ore having a relatively higher valence state to an...
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4053303 |
Method of carbothermically producing aluminum-silicon alloys
Aluminum-silicon alloys are formed by bringing a mix containing sources of alumina, silica and carbon to a temperature in the range of 1500° and 1600° C to form silicon carbide and carbon m...
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4014681 |
Vehicle recycling process
A vehicle recycling plant comprising a furnace, means for introducing a fuel into said furnace, a cupola disposed in close proximity to said furnace, and communicating therewith so that the hot...
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3997333 |
Process for the reduction of complex metallic ores
A process for the beneficiation and reduction of complex metallic ores characterized by the step of first preheating a complex ore containing a plurality of metal oxides in a reducing gas...
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3997711 |
Reduction furnace control
The invention covers methods and apparatus for controlled flue gas combustion during operation of a closed electric arc reduction furnace to produce metals and metal alloys while feeding a burden...
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3929459 |
Charging an electric furnace
A metallic charge is introduced into an electric furnace in a continuous fashion using as a feeding device an unobstructed tubular container of undulant or zig-zag shape. The feeding device is...
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3887359 |
Reduction of silicon dioxide by means of carbon in electric furnace
Silicon and silicon-containing alloys are produced in an electric furnace by reduction of silicon oxide with carbon wherein reaction gases pass through a portion of the charge rich in carbon to...
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3876418 |
Method for collecting the flue gases produced upon the charging of scrap and tapping of steel from electric furnaces
This disclosure teaches a method and related system for collecting gases generated upon charging of scrap to and tapping of steel from an electric furnace. A charging basket is brought into sealed...
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3792998 |
METHOD FOR PREVENTING THE DILUTION OF SULPHUR DIOXIDE CONTAINING WASTE GASES OBTAINED IN COPPER CONCENTRATE ELECTRIC SMELTING FURNACES
A method and apparatus for preventing the dilution of sulphur dioxide containing waste gases in copper concentrate electric smelting furnaces using an electrode of the Soderberg pattern. The waste...
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3679806 |
ELECTRIC REDUCTION FURNACE
In the production of metals and metal alloys from a charge of material containing at least one of manganese, silicon, and chromium, the charge of material is disposed within a closed combustion...
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3533611 |
FURNACE VENTILATION SYSTEM
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3703366 |
PROCESS FOR PRODUCING COPPER AND ELEMENTAL SULFUR
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3799763 |
METHOD AND APPARATUS FOR COOLING THE EXHAUST GAS SYSTEM OF METALLURGICAL VESSELS
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3276859 |
Process for the reduction of metals from oxide
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3269827 |
Process for preheating the charge to an electric smelting furnace
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3167420 |
Production of metals or alloys from ores
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3032410 |
Method and apparatus for the direct reduction of ores and subsequent fusion in a continuous operation
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2786747 |
Reduction of iron ores by carbon and steam and plant for carrying it into effect
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2782022 |
Apparatus for preparing metals and alloys from substances, containing fine-grain metal
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