从含锑烟灰中湿法提取立方晶型三氧化二锑

Extraction of Cubic Crystal Antimony Trioxide from Dusts Containing Antimony

以含锑烟尘为原料,采用HCl浸出—锑粉还原—Na2CO3中和—氨水添加EDTA水解工艺回收立方晶型Sb2O3产品。对回收工艺过程和条件进行了研究。重点探讨了浸出温度、浸出时间、HCl摩尔浓度、浸出液固比对Sb浸出率的影响,以及不同的SbCl3与EDTA摩尔比对产品Sb2O3晶型的影响。结果表明,采用该工艺Sb的浸出率为98.50%,Sb的回收率为90.35%,产品为纯的立方晶型Sb2O3。

With dusts containing antimony as raw material,the cubic crystal antimony trioxide was recovered by the processes including leaching in hydrochloric acid,antimony powder reduction,sodium carbonate-neutralization,and hydrolysis with EDTA as an additive in ammonia.The influences of leaching temperature,leaching time,hydrochloric acid concentrate,and ratio of liquid to solid on the leaching rate of Sb,and the molar ratio of SbCl3 to EDTA on the crystal of the antimony trioxide product were investigated.The results indicated that the leaching rate of Sb was 98.50%,the recovery of Sb was 90.35%,and the purity of product with cubic crystal antimony trioxide was 99.5%.