一种新型有机抑制剂的铜硫分离效果

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。

Effects of a New Organic Inhibitor on Separation of Pyrite from Chalcopyrite

New organic inhibitor of three carboxyl methyl-two sodium carbonate was developed in order to solve the problems of low separating rate and heavy loss of precious metals.Mono-mineral flotation test results show that:three carboxyl methyl-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 constructed，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 interaction energy is -98.70 kJ/mol，chalcopyrite interaction energy is -10.36 kJ/mol.The organic inhibitors has stronger inhibitory effect on pyrite than chalcopyrite .IR and UV spectroscopic analysis results further validate the simulation results．