低碱度铜硫分离高效抑制剂的研究

对有机抑制剂DP-1、无机抑制剂DP-2和DP-3浮选分离德兴铜矿一段铜硫混合精矿进行了试验研究。结果表明,DP-1、DP-2和DP-3都是铜硫分离时硫的有效抑制剂,但DP-3的综合性能要优于DP-1和DP-2抑制剂。闭路浮选试验结果表明,当DP-3总用量为500g/t时,可获得铜精矿中铜品位28.43%、铜回收率97.71%和钼品位0.212%、钼回收率80.56%的二段分离指标,与石灰工艺相比,铜、钼、金、银的回收率分别提高了0.75%、31.38%、2.76%和8.31%,表明低碱度浮选工艺对于伴生金属的回收具有十分明显的优势。生产综合样验证试验进一步证明捕收剂Mac-12和抑制剂DP-3可望实现德兴铜矿铜硫低碱度高效浮选分离。

STUDIES ON IMPROVED DEPRESSANTS FOR FLOTATION SEPARATION OF CU/FE SULFIDE MINERALS AT SLIGHTLY ALKALINE CONDITIONS

The flotation tests for separation of Cu/Fe sulfide minerals in the rougher concentrates were carried out by using different depressants in Dexing copper mine.The results indicated that three depressants DP-1, DP-2 and DP-3 could realize the flotation separation of Cu/Fe sulfide minerals,while DP-3 showed more superior performance than DP-1 and DP-2.The flotation results of locked cycle tests indicated that the copper cleaner concentrates with recoveries of Cu 97.71%,Mo 80.56%and grades of Cu 28.43%,Mo 0.212%have been obtained under 500g/t DP-3 as depressant against iron sulfide minerals in cleaner operation.Compared with lime system,the DP-3 depressant system increaed recoveries of Cu 0.75%,Au 2.76%,Mo 31.38%and Ag 8.31%in the copper concentrates.The complex ore results of locked cycle tests have further confirmed that the flotation separation of Cu/Fe sulfide minerals could been realized at low pH values by using collector Mac-12 and depressant DP-3,which was helpful for recovery of Mo, Au and Ag associatied in copper sulfide ores.