Xanthate interaction and flotation separation of H2O2-treated chalcopyrite and pyrite  

H2O2处理后的黄铜矿和黄铁矿对黄药的吸附作用及其浮选分离（英文）

作　　者：Sultan Ahmed KHOSO Yue-hua HU Fei LÜ Ya GAO Run-qing LIU Wei SUN Sultan Ahmed KHOSO;胡岳华;吕斐;高雅;刘润清;孙伟(中南大学资源加工与生物工程学院,长沙410083;中南大学战略含钙矿物资源清洁高效利用湖南省重点实验室,长沙410083)

机构地区：[1]School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,China [2]Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium Containing Minerals Resources,Central South University,Changsha 410083,China

出　　处：《Transactions of Nonferrous Metals Society of China》2019年第12期2604-2614,共11页中国有色金属学报（英文版）

基　　金：Projects(51704329,51705540) supported by the National Natural Science Foundation of China;Project(2015CX005) supported by the Innovation Driven Plan of Central South University,China;Project(B14034) supported by the National “111” Project,China;Project(2018TP1002) supported by the Collaborative Innovation Center for Clean and Efficient Utilization of Strategic Metal Mineral Resources,China

摘　　要：This study investigated the effects of H2O2 treatment on xanthate interaction and flotation separation of chalcopyrite and pyrite by making use of a series of laboratory flotation experiments and surface analysis techniques.Flotation test results showed that H2O2 treatment influenced the flotation behaviors of the two minerals;however,flotation of pyrite was depressed more significantly than that of the chalcopyrite.Under well-controlled H2O2 concentration,the selective separation of chalcopyrite from pyrite was realized at pH 9.0,at which the recovery of chalcopyrite was over 84%and that of pyrite was less than 24%.Zeta potential,UV-visible and IR spectrum measurements revealed that the collector interacted differently with the two minerals after H2O2 treatment,and the surface of chalcopyrite adsorbed much greater amount of xanthate than that of the pyrite.IR and XPS analyses showed that the H2O2 treatment significantly changed the surface properties of pyrite to very hydrophilic species that inhibited the adsorption of collector and thus depressed the floatability of pyrite.While,the surface of chalcopyrite remained mildly inert to H2O2,as a result,the adsorption of xanthate and its oxidation to dixanthogen were very effective,which enhanced the flotation of chalcopyrite.通过一系列浮选试验和矿物表面分析技术研究H2O2处理对黄药浮选分离黄铜矿与黄铁矿的影响。浮选试验结果表明,H2O2对两种矿物的浮选行为具有一定影响,H2O2对黄铁矿的抑制效果强于黄铜矿。在一定H2O2浓度条件下,黄铜矿在pH 9.0时可从黄铁矿中选择性分离出来,此时黄铜矿的回收率达84%以上,而黄铁矿回收率低于24%。Zeta电位、紫外-可见分光光谱以及红外光谱等分析结果表明,H2O2处理后的两种矿物对捕收剂的吸附量不同,黄铜矿表面对黄药的吸附量远远大于黄铁矿表面对黄药的吸附量。红外光谱和XPS分析结果表明,H2O2处理可大幅度提高黄铁矿表面的亲水性,从而抑制捕收剂的吸附,使其可浮性下降;而黄铜矿对H2O2不产生吸附,因此对黄药的吸附和对二黄原酸的氧化效果较好,黄铜矿的浮选回收率较高。

关 键 词：H2O2 treatment selective separation xanthate interaction CHALCOPYRITE PYRITE 

分 类 号：P61[天文地球—矿床学]