钨钼分离吸附剂的选择性判据  

Selectivity criterion of adsorbents for separation of tungsten and molybdenum

作　　者：王文强[1] 何利华[1] 赵中伟[1,2] 

机构地区：[1]中南大学冶金与环境学院,长沙410083 [2]中南大学稀有金属冶金与材料制备湖南省重点实验室,长沙410083

出　　处：《中国有色金属学报》2015年第8期2236-2242,共7页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金重点项目(51334008);湖南省研究生科研创新项目(1105-71380100001)

摘　　要：借鉴浮选药剂与矿物作用的亲固能计算方法,得到钨钼分离体系吸附剂与被吸附基团的吸附能计算公式。基于逐级均分法计算出钨钼分离过程中主要原子团的基团电负性,发现钼原子团(??24SMo Oxx)的基团电负性随着x的增加而减小,其与钨氧原子团(2?4WO)的电负性差异也逐渐增大。通过吸附能计算公式得到钨钼原子团在不同吸附剂上的吸附能,表明吸附剂极性越低,其对四硫代钼酸根的吸附能力越强。从而预测系列化合物对钼硫原子团选择性吸附的强弱,并被选择性沉淀法及实验室实验印证。本研究中吸附剂的分子设计思路有望为新型钨钼分离试剂的开发设计提供理论指导。Using the calculation method of interaction energy between flotation reagent and mineral, the calculation formula of absorption energy between adsorbent and adsorbed groups was derived for the separation of tungsten and molybdenum. Group electronegativities of related atom groups were calculated based on the electronegativity equalization, the group electronegativity of MOOxS2-4-x decreases with the increase of x, meanwhile, the difference between WOn2-4 and MOOxS2-4-x in group electronegativity enlarges. The adsorption energies of related atom groups on different adsorbents are obtained by the formula. The adsorption ability for MoS42- increases with the decrease of adsorbent polarity. The adsorption abilities of a series of compounds for MOOxSn2-4-x were predicted which were verified by selective precipitation and experiments given in this work. The method for molecular design of adsorbents may give directions for the development of new agents for separation of tungsten and molybdenum.

关 键 词：吸附能 钨 钼 分离 基团电负性 选择性沉淀法 

分 类 号：TF841[冶金工程—有色金属冶金]