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2002-06-18
Method of smelting reduction of ores containing metal oxides
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1984-08-29
A method and a melt-down gasifier for producing molten pig iron or steel pre-products
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1987-08-27
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1988-07-14
Tuyere of blast furnace
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1989-04-26
Process of and arrangement for recovering molten pig iron or steel pre-products from lumpy iron-oxide containing charging substances
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1992-08-26
Metallurgical lances
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1983-03-16
Use of prereduced ore in a blast furnace
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1993-08-10
Process of reasdting refractory gold ores
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1991-11-21
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1996-07-25
Refractory bricks for iron ore reduction reactors
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1995-04-21
Process of roasting refractory gold ores
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1994-05-19
Hot-blast main for hot-blast stove system of a blast furnace
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1988-08-22
Tuyere stock for blast furnaces
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1997-07-18
2-Stage fluidized bed furnace for pre-reducing fine iron ore and method for pre-reducing fine iron ore using the furnace
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1992-03-25
Prereduction furnace of a smelting reduction facility of iron ore
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1992-10-28
Prereduction furnace of a smelting reduction facility of iron ore
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1994-06-23
Ferrosilicon smelting in a direct current furnace
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1992-08-12
Control of carbon balance in a silicon smelting furnace
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1988-04-13
A shaft furnace for the direct reduction of iron ores
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1996-02-28
Blast furnace delivery method
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1997-12-03
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1993-02-10
Treatment of iron ore
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1992-11-23
Process for the reduction of iron-containing ores in a rotary furnace
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1989-08-30
Method of smelting reduction of ores containing metal oxides
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1993-04-07
Blast furnace tuyeres