摘要：
In the process, sodium sulfide is used to leach jamesonite. The resulted leaching solution is precipitated by feeding sulfur dioxide gas to generate antimony sulfide intermediates. After that, the antimony sulfide precipitate is oxidized in a stove to produce antimony white up to national standards. The optimal conditions, including being leached at 90°C for 3 h, stirring speed at 250 r/min, liquid-solid ratio of 2:1, with sodium sulfide to antimony in the mass ratio of 2.8 and sodium hydroxide to antimony in the mass ratio of 0.3, resulted in the antimony leaching rate up to 92.5%. The sulfur dioxide gas is fed into the leaching solution with the final pH controlled at 5~6, resulted in the obtained antimony sulfide containing 65% Sb, 30% S or less and 0.02% As or less, with antimony precipitation rate higher than 99%. Then, the antimony sulfide is melted at 980~1 000°C with air blown in from two directions for oxidation, leading to the obtained antimony white up to the national primary standard.%采用硫化钠浸出脆硫铅锑矿,浸出液通入二氧化硫气体沉淀出硫化锑中间体,再将硫化锑沉淀在炉中氧化,产出符合国家标准的合格锑白. 最佳工艺条件为:温度90 °C,时间3 h,搅拌速度250 r/min,液固比2:1,硫化钠与锑质量比为2.8,氢氧化钠与锑质量比为0.3,该条件下锑浸出率达92.5%. 将二氧化硫气体通入浸出液并控制终点pH值为5~6,锑沉淀率不低于99%,产出的硫化锑含Sb 65%、S含量不高于30%、As含量不高于0.02%. 硫化锑在980~1 000 °C下熔化,鼓入两路风氧化,产出的锑白产品达到国家一级标准.
