(中南大学 矿物工程系,长沙 410083)
摘 要: 为了查清高碱电位环境对闪锌矿表面性质抑制作用的根本原因,采用C2 Soterware分子力场中的万能力场方法,对闪锌矿(110)表面CaOH+和OH-两种离子的吸附进行了动力学模拟,并对吸附能和吸附质量云图进行了分析。模拟结果表明,相对于OH-来说,CaOH+在闪锌矿(110)表面的吸附能更负,吸附量更大。由此可知,这些吸附在表面的离子又与OH-和硫化矿氧化产物产生的SO2-4等离子作用形成不溶性亲水表面产物, 从而导致矿物受到抑制,这也正是高碱电位调控成功的原因之一。
关键字: 吸附;分子力场方法;闪锌矿;硫化矿浮选
adsorption on ZnS(110)
(Department of Mineral Engineering,
Central South University, Changsha 410083, China)
Abstract:The adsorption action of CaOH+ and OH- on ZnS( 110) was simulated by molecular-force-field method.The adsorption energy and qu ality distribution clouds was analyzed.The result indicates that there is more affinity between CaOH+ and ZnS(110) than that between OH- and the mineral surface.The result gives a good explanation for success of potential-control technique used in Fankou Lead-Zinc Plant.
Key words: sorption; molecular-force-field-method; sphalerite; sulfide-flotation