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HYDROMETALLURGICAL TREATMENT PROCESS FOR PURIFYING VANADIUM GROUP METALS OXIDES BY LEACHING WITH SODIUM CARBONATE
HYDROMETALLURGICAL TREATMENT PROCESS FOR PURIFYING VANADIUM GROUP METALS OXIDES BY LEACHING WITH SODIUM CARBONATE
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机译:碳酸钠浸出净化钒族金属氧化物的水冶金处理工艺。
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摘要
The hydrometallurgical treatment process provides for the removal of contaminants from waelz oxide, (chlorine, sodium, potassium, sulfur and fluorin, essentially), and comprises the followings steps: lixiviation with soldium carbonate in aqueous alcalin medium, in hot conditions; solid-liquid separation of the effluent and the solid material; purification of the effluent by removing the heavy metals and optionally the undesired anions; washing with water the solid material resulting from the sodic lixiviation; solid/liquid separation of the water and of the purified waelz oxide; recirculation and heating of the effluent obtained in the washing step in order to reuse it in the sodic lixiviation.
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