Studies on Environmentally Friendly Leaching Processes in China

被引：0
|
作者：
陈家镛
张懿
陆克源
龚乾
朱国才
机构：
来源：
Chinese Journal of Chemical Engineering | 2001年 / 01期
关键词：
iron chromite ore; lead sulfide ore; gold associated with sulfides; leaching; pretreatment; fused sodium hydroxide leaching; carbonate conversion of lead sulfide;
D O I：
暂无
中图分类号：
TQ028 [分离过程];
学科分类号：
摘要：
The newly developed green leaching processes for chromium, lead and gold extraction from ores or concentrates are described. The chromium is extracted from the iron chromite ore with fused sodium hydroxide at 500-550℃ as sodium chromate. The galena in lead sulfide concentrate is converted into lead carbonate in ammonium or sodium carbonate solution at 50-80℃ followed by the separation of lead carbonate formed from the unconverted sulfide ores by flotation. Gold associated with sulfide ore (such as pyrite and chalcopyrite) can be extracted into sodium thiosulfate solution without any pretreatment such as roasting, high pressure aqueous oxidation or bacteria pre-leaching.
引用
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页码：9 / 15
页数：7
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