DHN对富镍黄铁矿活化机理研究  

Study on activation mechanism of DHN for nickel-rich pyrite

作　　者：王宇斌[1] 文堪 张威 张小波[1] 李帅[1] WANG Yu-bin WEN Kan ZHANG Wei ZHANG Xiao-bo LI Shuai(College of Materials and Mineral Resources, Xi＇an University of Architecture and Technology, Xi＇an Shaanxi 710055, China Luo Molybdenum Group Beneficiation 3rd Company, Luanchuan Henan 471543, China)

机构地区：[1]西安建筑科技大学材料与矿资学院,陕西西安710055 [2]洛钼集团选矿三公司,河南栾川471543

出　　处：《化工矿物与加工》2017年第8期4-7,共4页Industrial Minerals & Processing

基　　金：陕西省科技厅项目(2014SJ-04)

摘　　要：对富镍黄铁矿进行了单矿物浮选试验,并采用Zeta电位检测、FTIR和XPS手段对富镍黄铁矿表面进行了表征。结果表明,随着含硫化合物DHN用量的增加,富镍黄铁矿的电位呈负向增大,富镍黄铁矿表面黄原酸盐的吸附量先增加后减少,而黄药的吸附量则逐渐增加。碱性条件下有利于DHN在富镍黄铁矿表面发生氧化反应,并生成单质硫。此外,经DHN作用后富镍黄铁矿表面的S元素含量增加,形成的含硫物质主要为疏水的单质硫和多硫化物,可明显改善富镍黄铁矿的可浮性。Flotation test was conducted on single mineral in nick- el-rich pyrite and the nickel-rich pyrite surface was characterized by Zeta, FTIR and XPS potential detection. The results showed that with the increase of amount of sulfur compound DHN, ; po- tential of nickel-rich pyrite enlarged negatively, adsorption amount of xanthate existed on the surface of nickel-rich pyrite increased and then decreased, and adsorption amount of xanthate molecule gradually increased. Alkaline condition was favorable for DHN to be oxidized on nickel-rich pyrite surface and to generate elemental sulfur. In addition, sulfur concentration on the nickel-rich pyrite surface increased after DNH was oxidized, and the formed sulphur bearing materials were mainly hydrophobic sulfur and polysulfide, which could improve the floatability of nickel-rich pyrite.

关 键 词：镍黄铁矿 丁基黄药 活化 机理 

分 类 号：TD971[矿业工程—选矿]