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To obtain a chromite concentrate with an acceptable silica content, it is very promising to apply the method of hydrochemical enrichment, which will make it possible to develop waste-free technology for leaching chromite ores and reduce the silica content in chromite concentrates. Before hydrochemical processing, it is advisable to apply the technology of gravity concentration. Modern gravity enrichment technologies make it possible to efficiently produce chromium concentrates from large and medium fractions of ch...

Gold deposits in black shale type have huge reserves of hard-gold. The prevailing part of reserves of native gold is in carbonaceous terrigenous deposits in Russia. These deposits are represented by objects of various scales - from small to unique (In Russia пїЅ Olimpiada, Nezhdanin, Natalkin, May; in Uzbekistan пїЅ Muruntau, Kokpatas, Zarmitan, Daugyztau, Amantaitau; in Kazakhstan пїЅ Bakyrchik; in Tajikistan пїЅ Chore; in Kyrgyzstan пїЅ Kumtor; in the United States пїЅ Mather Lod; in Australia пїЅ Bendigo, Olymp...