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1988-06-22
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1987-12-02
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1984-05-10
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1984-06-27
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1987-01-22
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1989-08-14
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1990-06-27
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1989-08-24
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1988-01-21
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1986-01-29
Ore flotation method
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1985-11-19
Method of obtaining manganese from low-grade ores containing oxidized manganese and large quantities of iron using the manganese reducing reaction
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1985-11-19
Method of obtaining manganese from low-grade ores containing oxidized manganese and large quantities of iron using the manganese reducing reaction
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1989-08-30
Method of smelting reduction of ores containing metal oxides
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1983-06-15
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1985-11-19
Method of obtaining manganese sulfate in an electrolyticprocessing solution from a mixture produced from reduced manganese ore
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1983-04-27
Reduction of iron ore
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1986-04-15
Method for extracting manganese and iron from liquid metallurgical slag
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1982-10-30
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1998-05-07
Method of smelting reduction of ores containing metal oxides