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1982-04-15
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1988-06-29
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1982-12-17
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1986-10-29
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1981-07-22
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1982-07-28
Method and apparatus for the gaseos reduction of iron ore to sponge iron
JPS5442302A
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1979-04-04
Method and apparatus for continuous leaching of ores
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1982-06-09
Rocess and apparatus for the direct reduction of iron ores
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1982-03-31
Process for the recovery of copper and zinc values from sulphidic ore
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1982-10-27
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1987-11-12
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1985-08-07
Method and apparatus for the gaseous reduction of iron ore to sponge iron
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1983-08-31
Method and apparatus for the smelting and fuming of tin concentrates
DE3161936D1
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1984-02-23
Process for the continuous direct smelting of metallic lead from sulfidic lead concentrates
PL123065B2
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1982-09-30
Method of treatment of metallurgic intermediate products, sulfide ores and/or ore concentrates
ZM3976A1
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1977-03-21
Method and apparatus for the prevention of sulphide formation in copper ore concentrates
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1979-10-04
Method and apparatus for cooling reduced material such as finely divided ore
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1985-12-17
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1981-06-22
Method and apparatus for the smelting of material such as ore concentrates
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1983-02-28
Process for obtaining lead from ores and concentrates
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1982-05-13
Smelting process and apparatus
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1982-12-29
Method and apparatus for the reduction of metal ores
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1982-08-25
Method and apparatus for reducing ore
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1983-12-31
Process for leaching copper and aresenic from the copper slag
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1984-05-24
Method and apparatus for leaching metal bearing ores