过氧化钙的工业化制备及在浸金中的应用

通过加入新型稳定剂磷酸盐,研究了常温水相中合成过氧化钙的新工艺,讨论了原料配比、温度、稳定剂加入量等因素对过氧化钙产率和纯度的影响。采用双桨叶与盘式干燥机进行两级干燥,可减少物料在湿态下的活性氧损失,过氧化钙质量分数达到了60%以上,双氧水利用率≥70%。应用此法生产的过氧化钙能显著提高金的浸出率,降低氰化物消耗,提高金的浸出速度。在相同的条件中,使用此法生产的过氧化钙可节约氰化物近30%。

Industrial preparation of calcium peroxide and its application in gold leaching

Through adding a new phosphate stabilizer,calcium peroxide was synthesized and studied in liquid phase at room temperature.Influences of the factors,such as mixture ratio of raw materials,temperature,and dosage of stabilizer on the yield and purity of calcium peroxide product,were discussed.By adopting two-stage drying with double-blade and tray driers,active oxygen loss of raw materials in wet state can be reduced,the mass fraction of calcium peroxide reached more than 60%,and the utilization rate of hydro...