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PROCESS OF OBTAINING TIN FROM PREVIOUS OXIDIC OR OXIDIC-SULFIDIC MINING CONCENTRATES, POOR IN TIN
PROCESS OF OBTAINING TIN FROM PREVIOUS OXIDIC OR OXIDIC-SULFIDIC MINING CONCENTRATES, POOR IN TIN
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机译:从先前含锡量低的氧化或氧化硫矿精矿中获取锡的过程
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摘要
A process is described for recovering tin from oxide or oxide/sulphide low-grade starting materials and concentrates containing little or relatively low concentrations of tin, in which such low-grade starting materials are mixed with KOH and decomposed at high temperatures. The decomposed substance is then leached with water, and metallic tin is separated out electrolytically in one or more stages from the lye. The electrolyte with reduced tin content is concentrated by evaporation, impurities being removed, and dehydrated. The potassium hydroxide solution recovered is re-used for decomposition.
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