中文摘要：

为解决采用无机抑制剂进行铜硫分离时铜硫分离效果差、伴生贵金属流失严重等问题,开发了新型有机抑制剂三羧基甲基-二硫代碳酸钠。单矿物浮选试验结果表明：在pH=9~12、三羧基甲基-二硫代碳酸钠浓度为2．4×10^-3 mol/L时,对黄铁矿抑制效果较好、对黄铜矿抑制作用较弱,可以实现低碱条件下的铜硫分离。采用三羧基甲基-二硫代碳酸钠进行黄铁矿、黄铜矿人工混合矿浮选试验,获得了铜品位为31．69%、回收率为91．36%的铜精矿,实现了铜硫有效分离。应用Materials Studio分子模拟软件构建药剂、矿物模型,通过分子模拟方法探讨三羧基甲基-二硫代碳酸钠的作用机理,结果表明,该药剂与黄铁矿、黄铜矿的作用能都为负值,其中与黄铁矿作用能为-98．70 kJ/mol,与黄铜矿作用能为-10．36 kJ/mol,故该药剂对黄铁矿抑制作用更强,对黄铜矿的抑制较差,并通过红外光谱和紫外光谱分析结果得到了验证。

英文摘要：

New organic inhibitor of three carboxyl methyl-two sodium carbonate was developed in order to solve the prob-lems of low separating rate and heavy loss of precious metals. Mono-mineral flotation test results show that：three carboxyl meth-yl-two sodium carbonate can well depress pyrite,and has little effect on chalcopyrite flotation with concentration of 2. 4×10^-3 mol/L,pH=9~12. It can be concluded that three carboxyl methyl-two sodium carbonate can separate copper from sulphur. Copper concentrate with copper grade of 31. 69% and recovery of 91. 36% is obtained by flotation tests of artificial mixed ore on separation of chalcopyrite from pyrite. Materials Studio Molecular Simulation Software is brought in reagent and mineral con-structed,working mechanism of three carboxyl methyl-two sodium carbonate was analysed via moleculer simulation method. The results indicated that the interaction energy between the organic inhibitor and each kind of sulfide ore is negative,pyrite inter-action energy is-98. 70 kJ/mol,chalcopyrite interaction energy is-10. 36 kJ/mol. The organic inhibitors has stronger inhibito-ry effect on pyrite than chalcopyrite . IR and UV spectroscopic analysis results further validate the simulation results.