Acid mine drainage activation mechanism on lime-depressed pyrite flotation from copper sulfide ore  

酸性矿山废水对硫化铜矿中石灰抑制黄铁矿浮选的活化机理

作　　者：Jia-qiao YUAN Zhan DING Yun-xiao BI Jie LI Shu-ming WEN Shao-jun BAI 袁加巧;丁湛;毕云霄;李颉;文书明;柏少军(昆明理工大学国土资源工程学院,昆明650093;昆明理工大学复杂有色金属资源清洁利用国家重点实验室,昆明650093;昆明理工大学云南省战略金属矿产资源绿色分离与富集重点实验室,昆明650093)

机构地区：[1]Faculty of Land Resource Engineering,Kunming University of Science and Technology,Kunming 650093,China [2]State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization,Kunming University of Science and Technology,Kunming 650093,China [3]Yunnan Key Laboratory of Green Separation and Enrichment of Strategic Mineral Resources,Kunming University of Science and Technology,Kunming 650093,China

出　　处：《Transactions of Nonferrous Metals Society of China》2024年第9期2987-3001,共15页中国有色金属学报（英文版）

基　　金：financially supported from the National Natural Science Foundation of China(No.52164021);the Natural Science Foundation of Yunnan Province,China(No.2019FB078)。

摘　　要：The lime-depressed pyrite from Cu differential flotation tailings with acid mine drainage(AMD)as a natural activator was recovered.The effect of AMD on lime-depressed pyrite flotation was investigated by a series of laboratory flotation tests and surface analytical techniques.Flotation test results indicated that AMD could effectively activate the pyrite flotation with a sodium butyl xanthate(SBX)collector,and a high-quality sulfur concentrate was obtained.Pulp ion concentration analysis results indicated that AMD facilitated desorption of Ca^(2+)and adsorption of Cu^(2+)on the depressed-pyrite surface.Adsorption measurements and contact angle analysis results confirmed that adding AMD improved the adsorption amount of SBX collector on the pyrite surface and increased the contact angle by 31°.Results of Raman spectroscopy and X-ray photoelectron spectroscopy analysis indicated that AMD treatment promoted the formation of hydrophobic species(S^(0) hydrophobic entity and copper sulfides)and the removal of hydrophilic calcium and iron species on the pyrite surface,which reinforced the adsorption of collector.The findings of the present research provide important theoretical basis and technical support for a cleaner production of copper sulfide ores.以酸性矿山废水(AMD)为天然活化剂,从铜优先浮选尾矿中回收被石灰抑制的黄铁矿。通过一系列实验室浮选试验和表面分析技术研究AMD对石灰抑制黄铁矿浮选的影响。浮选试验结果表明,以丁基黄药(SBX)为捕收剂,AMD能够有效地活化黄铁矿浮选,并获得高品质的硫精矿。矿浆离子浓度分析结果表明,AMD促进了被抑制黄铁矿表面Ca^(2+)的解吸和Cu^(2+)的吸附。吸附测量和接触角分析结果表明,加入AMD后,SBX在黄铁矿表面的吸附量增加,其接触角增加了31°。拉曼光谱和X射线光电子能谱分析结果表明,AMD的添加促进了疏水性物种(S^(0)疏水体和硫化铜物种)的形成,并去除了黄铁矿表面的亲水性钙和铁物种,从而加强了捕收剂在黄铁矿表面的吸附作用。本研究为硫化铜矿的清洁生产提供了重要的理论依据和技术支持。

关 键 词：copper sulfur ore acid mine drainage lime-depressed pyrite FLOTATION natural activator activation mechanism 

分 类 号：TD951[矿业工程—选矿] TD923