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7608128 |
Direct reduction process and apparatus
A direct reduction process for a metalliferous material includes supplying a solid carbonaceous material and an oxygen-containing gas into a fluidized bed in a first vessel and generating heat by...
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6599374 |
Method for producing a mixture of iron carbide and granular, directly reduced iron
An end product containing iron carbide (Fe 3 C) is produced from an intermediate product consisting of granular, directly reduced iron. Said intermediate product is supplied by an iron ore...
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6454833 |
Process for producing liquid pig iron or semifinished steel products from iron-containing materials
In a method for producing liquid pig iron ( 9 ) or steel pre-products from fine-particulate iron-containing material ( 4 ) in a melter gasifier ( 1 ), the iron-containing material ( 4 ) is melted...
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6379426 |
Fluidized bed reduction of laterite fines with reducing gases generated in situ
The present invention is concerned with a method for the pre-reduction of laterite fines in a reactor, preferably a fluidized bed, with reducing gases generated in situ by adding a reducing agent...
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6277171 |
Method of reducing the iron content of steel slag
A method of reducing the iron content of starting material containing calcium, silicon and oxygen, and iron in the form of a ferrite and/or oxide, for example a steel slag, includes the steps of...
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6235082 |
Process for producing liquid metal and facilities for carrying out the process
With a method for producing liquid metal from charging substances containing ore and of fluxes, the ore is directly reduced to sponge metal in at least one reduction zone (5, 7, 8), the sponge...
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6224650 |
Apparatus for manufacturing molten iron by using calcination furnace, and manufacturing method therefor
An apparatus for manufacturing molten iron by using a calcination furnace, and a manufacturing method therefor are disclosed. A high temperature reducing gas (1000 to 1100° C.) from a melter...
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5938815 |
Iron ore refining method
An iron ore refining method in which a secondary reactor is employed for partly reducing iron ore and partly oxidizing a carbon containing substance to form partly reduced secondary iron ore, the...
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5445667 |
Method for reducing material containing metal oxide in solid phase
A method of reducing material containing metal oxide in a circulating fluidized bed, in which coal in excess and air is introduced into the fluidization chamber so as to maintain a temperature of...
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5364448 |
Process for the production of liquid metal from fine-grain metal oxide particles and reducing and smelting furnace for carrying out the process
In a process and an apparatus for the production of liquid metal (4) from fine-grain metal oxide particles, the particles, together with hot reducing gas, are blown against a heated bulk material...
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4995904 |
Method for the pretreatment of a lumpy carbon carrier
A method is disclosed for pretreatment of a lumpy carbon carrier suitable for forming a fluidized bed and a solid bed used in the production of pig iron from iron ore. The ore is pre-reduced in at...
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4895593 |
Process of recovering molten pig iron or steel pre-products from lumpy iron-oxide and scrap using a fluidized bed
This is disclosed a process of recovering molten pig iron or steel pre-products from lumpy iron-oxide containing charging substances. The charging substances are reduced to sponge iron in a direct...
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4806158 |
Process of reducing fine-grained iron-containing material by means of solid carbonaceous reducing agents
Disclosed is a process for the production of reduced iron oxide-containing materials. Iron oxide and solid carbonaceous reducing agent are charged into a first expanded fluidized bed, which is...
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4374663 |
Method and apparatus for reducing an iron oxide material in a fluidized bed
A method is suggested for the reduction of finely-divided iron oxide in a fluidized bed, with the air of reducing gases formed by partial combustion in the bed of finely-divided carbonaceous...
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4360378 |
Direct reduction of iron oxide containing material with biofuel
A new method is devised for the production of raw iron or so-called metallized iron ore. Biofuels i.e. preferably fuel wood and/or peat is in the final reduction brought into direct contact with...
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4359212 |
Apparatus for reducing finely divided iron oxide material
Apparatus for reducing finely divided iron oxide material, comprising a reactor containing a vertical upper reaction chamber connected downwardly to a narrower, vertical reaction chamber. A cyclone...
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4224056 |
Direct reduction process for iron ores with fluidized bed system
In a reactor, fine iron ore solids are made to descend through the fluidized bed of fine carbon bearing particles sustained within the reactor so that the fine iron ore solids may be reduced and...
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4147615 |
Hot sand-coal-cracking to hydrodistillate fuels
Fuel liquids and gases from a hydrocarbonaceous material such as coal may be produced by contacting the material with an iron group metal silicide, preferably cobalt and/or iron silicide. Also, an...
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4098604 |
Method for reduction in a fluid bed of fine grained material containing iron oxide
A method for partial reduction in a fluid bed of a fine grained iron oxide containing material whereby a fine grain low sulphur content mixture of partially reduced iron oxide containing material...
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4084958 |
Method of reducing finely grained material containing iron oxides in a fluid bed
Fine-grained iron oxide reduction in a fluidized bed; a reducing agent in the form of fine-grained solid carbonaceous material containing volatile constituents is introduced into at least one zone...
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4073642 |
Method for reducing material containing iron oxides
A method of reducing a pulverized material containing iron oxides mixed with carbonaceous material wherein: (a) a circulating fluidized bed is maintained in a vertically elongated reaction zone by...
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4070181 |
Method for reduction of finely divided metal oxide material
In the reduction of finely divided material containing metal oxide in the presence of a carbonaceous material in a reactor, a gas containing molecular oxygen is supplied to the material and a gas...
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4042376 |
Method for carrying out endothermic reduction processes in a circulating fluid bed and an apparatus therefor
A method for endothermic reduction of solid materials in a circulating fluid bed comprising a vertically elongated reaction zone of intermediate and lower sections separated by a transport zone,...
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3928021 |
Process of reducing iron ores
An improvement in the fluidized bed process for composite pellets blended with iron ore and solid reducing agents wherein the off-gas produced in the fluidized bed is fed to a first heat-exchanger...
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3850615 |
METHOD OF ILMENITE REDUCTION
Beneficiation of ferrotitaniferous ores using a particulate relatively coarse, solid carbonaceous reducing agent to reduce iron from the ferrous to the metallic state in a fluidized bed, with a...
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3615352 |
PROCESS FOR REDUCTION OF IRON ORE IN STAGED BEDS WITHOUT BOGGING
A multistage, high temperature fluidized iron ore reduction process is described wherein bogging or defluidization is prevented by adding specified particulate agents to ferrous reduction zones.
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3377156 |
Process of reducing iron oxide ores with gases containing carbon monoxide
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3346366 |
Fluidized ore reduction with basic nitrogenous additives to prevent bogging
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3346365 |
Treatment of fluidized oxidic iron ores to inhibit bogging
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3235374 |
System and process for the direct reduction of iron ore
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3227546 |
Direct reduction of metallic ores
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2932563 |
Process for reducing iron ores at low temperatures
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