Sulfide precipitation flotation for treatment of acidic mine waste water
来源期刊：中国有色金属学报(英文版)2000年第z1期
论文作者：邹莲花 薛玉兰
文章页码：106 - 109
Key words：sulfide precipitation flotation； acidic mine waste water
Abstract: Sulfide precipitation flotation of copper iron bearing acidic waste water from a large copper mine and the stimulated waste water were studied. The pH of the waste water was 2.2, with 130 mg/L Cu2+ and 500 mg/L Fe3+ (Fe2+). Results show that, when Na2S was added as precipitating agent, sodium butylxanthate as collector and at pH 2.0, the removal of copper could be as high as 99.7% and the residual copper decreased to 0.2 mg/L, however, almost no iron was removed. When the floated solution was neutralized to pH=8.0, more than 98% iron was precipitated and the residual iron was less than 10 mg/L. In experiment on actual mine effluents, after the use of precipitate flotation technology to recover copper and pH neutralization to precipitate iron, the treated waste water does meet the emission standards for sewage and valuable floating copper graded 37.12%. The chemical calculation and mechanism of solution were also presented.
