新型组合抑制剂对微细粒方铅矿抑制机理研究

Study on the Inhibition Mechanism of New Combination Inhibitors on Fine Galena

针对微细粒方铅矿在磨矿体系、矿浆溶液中物化性质的变化,致使铜铅分离难度增大的现状,研究开发出新型组合抑制剂SHI(亚硫酸钠和磺化木质素)用于抑制微细粒的方铅矿的浮选。结果表明:SHI在低浓度的Na2SiO3条件下对-0.015 mm粒级方铅矿有明显的抑制效果,通过红外光谱分析和XPS分析查明,SHI在方铅矿表面发生了吸附作用,在方铅矿表面引入了新的元素,并影响了S的价态。新型组合抑制剂SHI不仅可实现微细粒级黄铜矿与方铅矿人工混合矿的高效分离,将其应用于含大量微细粒方铅矿的墨竹工卡含铜9.60%、含铅36.61%的铜铅混合精矿铜铅分离,经1粗3精2扫闭路浮选分离后,可得到含铜22.22%、含铅3.22%,铜回收率95.66%、铅回收率3.22%的铜精矿,铅精矿含铜0.71%、含铅60.33%,铜回收率4.34%、铅回收率96.38%,铜铅分离效果较好。

In view of the changes of physical and chemical properties of fine galena in grinding system and pulp solution,which makes the separation of copper and lead more difficult. A new combination inhibitor SHI(sodium sulfite and sulfonated lignin) was developed to inhibit the flotation of fine galena. The experimental results show that SHI has obvious inhibitory effect on galena with-0.015 mm grain size under the conditions of low concentration of Na2SiO3. It was found that SHI adsorbs on the surface of galena by infrared spectroscopy and XPS analysis. New elements are introduced on the surface of galena,and the valence state of S is affected. The new combined inhibitor can not only realize the efficient separation of fine artificial mixed ore,but also be applied to the separation process of Mozhu Gongka copper and lead mixed concentrate containing a large number of fine galena. Under the conditions of Cu 9.60% and Pb 36.61%,copper concentrate containing 22.22%Cu,3.22% Pb,with Cu recovery of 95.66% and Pb recovery of 3.22% can be obtained. Lead concentrate containing 0.71%Cu,60.33% Pb,with Cu recovery of 4.34%,Pb recovery of 96.38%. The separtion efficient of copper and galene is good.