(中南工业大学矿物工程系， 长沙 410083；
1 广东工业大学环境与资源工程系， 广州 510090)
摘 要: 运用电化学电位调控浮选理论， 对方铅矿-石灰-乙硫氮体系进行研究。结果表明： 在高碱介质中， 石灰不仅仅是作为矿浆pH的调整剂 ，还表现出对特定的矿浆电位有很好的稳定作用，而这一特定的矿浆电位正是方铅矿的浮选电位；与黄药相比， 乙硫氮是方铅矿更好的选择性捕收剂。 电位调控浮选在两个矿山的生产实践表明， 未加闪锌矿抑制剂， 实现了铅锌铁硫化矿的有效浮选分离，其中铅精矿品位分别提高0.73%和1.89%， 铅的回收率分别提高2.24% 和6 .58%，锌的回收率分别提高4.63%和4.19%， 同时， 两个矿山的每吨原矿药剂成本均下降1 0元左右。这一研究成果使电化学调控捕收剂浮选在生产实践中成功应用迈出了一步。
关键字: 方铅矿 乙硫氮 石灰 电位调控浮选
（1 Department of Environment and Resource Engineering, Guangdong University of Technology, Guangzhou 510090, P. R. China）
Abstract:The flotation electrochemistry of the galena-lime-diethyldithiocarbamate system was studied by theory of potential adjustment flotation. The results showed that, in strong alkaline media, lime was regulator of pH, it could stabilize special potential very well , and this special potential was exactly flotation potential of galena. Diethyldithiocarbamate was more better selective collector than Xanthate on galena. Furthermore the separation practice in Lechang Lead-Zinc Mine, Guangdong, and Beishan Lead-Zinc Mine, Guangxi, showed that, without adding zinc-depressants, lead-zinc-iron sulfide minerals could get effective separation. The grade of lead concentrate were increased by 0.73% and 7.89%, lead recovery were increased by 2.24% and 6.58%, and zinc recovery were increased by 4.63% and 4.19%, respectively. Meanwhile, reagent cost were all decreased by ten Yuan per ton ores in these two mines. It marks that potential adjustment flotation of sulfide minerals has been applied successfully in production practice.
Key words: galena diethyldithiocarbamate lime potential a djustment flotation
