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- Recovering elemental sulfur from nonferrous minerals :ferric chloride leaching of chalcopyrite concentrate
- Electrolytic preparation of titanium and zirconium diborides from their oxides and mineral concentrates
- Recovering byproduct heavy minerals from sand and gravel, placer gold, and industrial mineral operations
- Recovery of byproduct heavy minerals from sand and gravel operations in central and southern California
- Recovery of byproduct heavy minerals from sand and gravel operations in Oregon and Washington