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1987-02-18
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1993-06-11
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1991-01-30
Recovery of precious metals
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1982-04-28
Process for the recovery of gold and/or silver and possibly bismuth contained in sulfuretted ore and/or sulfoarsenides
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1988-07-28
Continuous conversion of copper sulphide ores and concentrates into raw copper
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1983-12-14
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1985-11-05
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1989-02-23
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1985-08-29
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1988-08-03
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1990-05-14
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1990-06-27
Concentration of oxidized copper ores
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1986-08-27
Method of recovery of gold and other metals
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1988-11-30
Treatment of precious metal ores
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1987-08-13
Method and apparatus for biological processing of metal- containing ores
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1987-08-13
Recovery of gold and silver from ores
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1985-10-30
Process and installation for the treatment of gold ores
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1989-05-30
The production of mattes containing platinum group metals and gold
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1992-03-02
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1990-12-05
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1986-08-13
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1988-10-27
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1989-09-12
Method of ores' difficult-to-leach fine portions treatment
ZW11988A1
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1988-11-23
The production of mattes containing platinum group metals and gold
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1992-11-15
Electrochemical method of removing gold and silver covering from substrate