响应曲面法优化铜硫浮选分离试验研究

Experimental study on the optimization of copper-sulfur flotation separation by using the response surface method

根据对铜矿的工艺矿物学分析,制定了先混合浮选后铜硫分离的工艺流程。通过单因素试验确定了混合浮选粗选丁基黄药与丁铵黑药最佳用量为180 g/t+90 g/t,二段磨矿最佳磨矿细度为-0.045 mm含量为80%,铜硫分离粗选捕收剂Z-200最佳用量为30 g/t。采用响应曲面法对铜硫分离抑制剂用量进行优化,结果表明抑制剂的最佳用量分别为Na_(2)S 119.43 g/t、CaO 1874 g/t、KG 498.26 g/t,在该条件下软件模拟得到Cu品位和回收率分别为8.47%、95.67%,与实际优化浮选试验结果相近。采用上诉最佳药剂制度进行闭路试验,最终获得Cu品位23.64%、Cu回收率92.54%的铜精矿和S品位43.45%、S回收率82.86%的硫精矿。

According to the process mineralogy analysis of copper ores,the technological process of copper-sulfur separation after mixed flotation of copper ores has been developed.Through a single factor test,it is determined that the optimal dosages of butyl xanthate and ammonium dibutyl dithiophosphate used in the mixed flotation are 180 g/t and 90 g/t,respectively.The optimal grinding fineness of particles after secondary grinding is-0.045 mm at percentage of 80%.The optimal dosage of the collector Z-200 for the rough copper-sulfur separation of ores is 30 g/t.The response surface method was used to optimize the dosage of inhibitor for copper-sulfur separation.The results show that the optimal dosages of inhibitor materials are 119.43 g/t for Na_(2)S,1874 g/t for CaO,and 498.26 g/t for KG,respectively.Under this condition,the Cu grade and recovery rate of the copper concentrate obtained by using the software simulation are 8.47%and 95.67%,respectively,which are similar to the actual optimized flotation test results.A closed-circuit test has been carried out using the optimal pharmaceutical system,with the final obtained copper concentrate having a Cu grade of 23.64%at a recovery rate of 92.54%and sulfur concentrate having an S grade of 43.45%at a recovery rate of 82.86%.