捕收剂CSU-A与黄铜矿作用机理

来源期刊：中南大学学报(自然科学版)2003年第6期

论文作者：欧乐明 冯其明 沈刚

文章页码：603 - 605

关键词：捕收剂;化学吸附;物理吸附

Key words：collector; chemical absorption; physical absorption

摘    要：通过矿物浮选实验、吸附量测试以及红外光谱分析,研究CSU-A与黄铜矿和黄铁矿相互作用的规律.浮选实验结果表明,当CSU-A的质量浓度为6 mg/L,溶液pH值为9.0~9.5时,CSU-A对黄铜矿捕收能力强,对黄铁矿捕收能力弱;红外光谱分析结果表明,捕收剂CSU-A与黄铜矿和黄铁矿作用前、后的红外光谱图明显不同,在黄铜矿与药剂作用后出现了6 cm^-1的波数位移,而黄铁矿与捕收剂作用前、后的红外光谱图基本上没有变化.由此可以确定,捕收剂CSU-A在黄铜矿表面发生了化学吸附,而在黄铁矿表面仅是简单的物理吸附.捕收剂CSU-A具有选择性的主要原因是在黄铜矿和黄铁矿表面发生吸附的形式不同.

Abstract: The interaction of CSU-A with chalcopyrite and pyrite was studied by mineral flotation test, absorption measurement and infrared spectrum analysis. Flotation test indicates that the collecting ability of CSU-A to chalcopyrite is stronger than thatto pyrite (content of CSU-A is 6 mg/L, pH is 9.0~9.5). Infrared spectrum shows that the characteristic absorption peak (1 096 cm^-1) of CSU-A shift to 1 090 cm^-1 after being absorbed onto chalcopyrite surface. There is 6 cm^-1 wavenumber displacement, which shows that chemical absorption occurs while CSU-A is absorbed onto chalcopyrite surface. However, infrared spectrum of CSU-A has no obvious change after it is absorbed onto pyrite surface,which indicates only physical absorption occurs. It is concluded that the flotation selectivity of collector CSU-A is due to chemical absorption onto chalcopyrite surface and only physical absorption onto pyrite surface.

基金信息：国家自然科学基金资助项目