苯甲羟肟酸浮选黑钨矿体系中铅离子的活化作用机理  

Activation mechanism of Pb^(2+) in flotation of wolframite with benzohydroxamic acid as collector

作　　者：高玉德[1,2] 钟传刚[1,3,2,4] 邱显扬[1,2] 冯其明[4] 万丽[1] 

机构地区：[1]广州有色金属研究院,广州510651 [2]稀有金属分离与综合利用国家重点实验室,广州510651 [3]万宝矿产有限公司,北京100053 [4]中南大学资源加工与生物工程学院,长沙410083

出　　处：《中国有色金属学报》2016年第9期1999-2006,共8页The Chinese Journal of Nonferrous Metals

基　　金：国家重点基础研究发展计划资助项目(2010CB735500);广东省重大科技专项(2011A080403007)~~

摘　　要：通过浮选实验、吸附量测定、红外光谱分析、XPS测试和浮选溶液化学计算研究Pb^(2+)活化苯甲羟肟酸浮选黑钨矿作用机理。结果表明:Pb^(2+)可明显活化苯甲羟肟酸浮选黑钨矿,pH值为6~10时,黑钨矿都保持较好的可浮性,p H值为9时浮选回收率最高;Pb^(2+)促进苯甲羟肟酸在黑钨矿表面的吸附,且很好地符合Freundlich吸附等温方程;黑钨矿表面主要活性质点为Mn^(2+);pH值为9时Mn^(2+)的主要存在形式是界面氢氧化锰沉淀,苯甲羟肟酸与之发生"O,O"螯合生成羟肟酸金属盐。The activation mechanism of Pb^2＋ in flotation of wolframite with benzohydroxamic acid as collector was studied through flotation test, adsorptive capacity, IR spectroscopy, XPS study and flotation chemistry calculation. The results show that Pb^2＋ can increase the floatability of wolframite and the optimum p H region is 6-10, the floatation recovery rate reaches maximum when p H=9; the adsorption test shows Pb^2＋ can promote the adsorption of benzohydroxamic acid onto the surface of wolframite, and the adsorption isotherm obeys Freundlich equation quite well; tthe result of XPS study shows the main activity of species is Mn^2＋, and the floatation chemistry reveals the majority of Mn^2＋ exists as surface manganese hydroxide; two oxygen atoms from hydroxamate anion chelate manganese hydroxide on the surface of wolframite and form five- chain complex.

关 键 词：苯甲羟肟酸 黑钨矿 铅离子 浮选 活化机理 

分 类 号：TD923[矿业工程—选矿] TD952