亚硫酸钠在乙硫氮-方铅矿浮选体系中的作用及机理研究  

Research on Effect and Mechanism of Sodium Sulfite in Diethyldithiocarbamate-Galena Flotation System

作　　者：苏建芳 肖巧斌 王中明 刘方 谭欣 Su Jianfang;Xiao Qiaobin;Wang Zhongming;Liu Fang;Tan Xin(State Key Laboratory of Mineral Processing Science and Technology,BGRIMM Technology Group,Beijing,China)

机构地区：[1]北京矿冶科技集团有限公司矿物加工科学与技术国家重点实验室,北京102628

出　　处：《矿产综合利用》2020年第3期203-208,共6页Multipurpose Utilization of Mineral Resources

基　　金：北京矿冶科技集团科研基金(JTKJ1839)。

摘　　要：通过方铅矿单矿物浮选试验、吸附量测定、红外光谱检测和电化学计算等手段,研究了亚硫酸钠在乙硫氮-方铅矿浮选体系中的作用及机理。研究结果表明:乙硫氮-方铅矿浮选体系中,方铅矿浮选的较佳乙硫氮浓度为4×10-5 mol/L,方铅矿浮选的较佳pH范围为6 ~ 11;乙硫氮与方铅矿表面相互作用形成的疏水性产物主要为二乙基二硫代氨基甲酸铅(PbD2);中性及碱性条件下在乙硫氮-方铅矿浮选体系中添加亚硫酸钠后红外光谱特征吸收峰增强;乙硫氮-方铅矿浮选体系中的矿浆pH值随着亚硫酸钠的添加而升高,方铅矿的自身氧化反映随着矿浆pH值得升高而受到一定程度的抑制,从而使方铅矿可浮性变好。Effect and mechanism of sodium sulfite in diethyldithiocarbamate-galena flotation system were studied by means of pure mineral flotation tests,adsorption quantity determination,infrared spectroscopy and electrochemical calculation.The results showed that in the diethyldithiocarbamate-galena flotation system,4×10^-5mol/L diethyldithiocarbamate was considered as the optimum collector concentration and pH 6~11 as the appropriate pH value range.The hydrophobic product of the interaction between diethyldithiocarbamate and galena is diethyldithiocarbamate lead.In the neutral or alkaline flotation system,the infrared spectrum characteristic absorption peak of diethyldithiocarbamate lead was stronger with the addition of sodium sulfite.The addition of sodium sulfite could improve the pulp pH value,which would inhibit the galena oxidation and then promote the galena flotation.

关 键 词：亚硫酸钠 乙硫氮 方铅矿 吸附 电化学计算 浮选 

分 类 号：TD952[矿业工程—选矿]