(中南大学资源加工与生物工程学院,
长沙 410083)
摘 要: 运用机械电化学技术,研究了磨矿介质类型、机械力的大小对矿物电极电位和表面反应电流的影响,并考察了矿物与矿物之间,矿物与介质之间存在的腐蚀电偶作用,发现这些作用会对硫化矿表面的氧化还原反应机制产生影响,进而影响到矿物表面的疏水和亲水性。硫化矿在不同机械力下的表面形貌的研究进一步证明了上述结论。
关键字: 方铅矿; 电极电位; 机械电化学; 电位调控浮选
(College of Resource Processing and Biology Engineer,
Central South University. Changsha 410083, China)
Abstract:A special cell was designed to study mechanical electrochemistry phenomena in grinding environment. It was found that the grinding media type and mechanical pressure have a pronounced effects on the potential and current of the mineral surfaces; The electrode potential of galena decreases with the increase of mechanical pressure on it and changes with the different grinding media following the order of iron >sphalerite>pyrite. The results show that these effects can change activity of surface, which have an important effect on reaction mechanism.
Key words: pyrite; electrode potential; mechanical electrochemistry; potential-controlled flotation