(遼寧科技大學(xué) 礦業(yè)工程學(xué)院，鞍山 114001)
摘 要: 以含銀方鉛礦為研究對(duì)象，考查了丁銨黑藥、乙基黃藥、乙硫氮三種捕收劑，碳酸鈉、石灰兩種調(diào)整劑對(duì)其浮選行為的影響，并通過(guò)Zeta電位測(cè)定和吸附量測(cè)定進(jìn)行捕收機(jī)理分析。浮選行為結(jié)果表明：含銀方鉛礦適合在弱堿性介質(zhì)下回收，且含銀量越高，上浮趨勢(shì)越明顯；與石灰相比，碳酸鈉做調(diào)整劑時(shí)獲得的含銀方鉛礦回收率更高；丁銨黑藥是弱堿性介質(zhì)下回收含銀方鉛礦較好的捕收劑，乙硫氮在強(qiáng)堿性介質(zhì)中也可以回收含銀方鉛礦，但回收率偏低。機(jī)理分析結(jié)果表明：在弱堿性介質(zhì)下，丁銨黑藥不僅表面Zeta電位負(fù)移量明顯高于其他兩種藥劑，而且在含銀方鉛礦表面的飽和吸附量也最大。根據(jù)熱力學(xué)方法計(jì)算得到丁銨黑藥和乙硫氮浮選含銀方鉛礦的臨界pH值分別為9.27和10.81，與實(shí)際浮選規(guī)律一致。
關(guān)鍵字: 含銀方鉛礦；浮選；捕收機(jī)理；回收率
（School of Mining Engineering, University of Science and Technology Liaoning, Anshan 114051, China）
Abstract:Using the Ag-bearing galena as a research object, the influence of three types of ammonium dibutyl dithiophosphate (ADD), ethyl xanthate (EX), diethyldithiocarbamate (DDTC), sodium carbonate, lime two regulators on its flotation behavior were investigated. The capture mechanism analysis was carried out by Zeta potential measurement and adsorption measurement. The results of flotation behavior show that the Ag-bearing galena is suitable for recovery in weakly alkaline medium and the upward trend is more obvious with the increase of Ag content. Compared with lime, the recovery rate of Ag-bearing galena is higher when sodium carbonate is used as regulator. Ammonium dibutyl dithiophosphate (ADD) is a good collector for recovery of Ag-bearing galena in weakly alkaline medium, and diethyldithiocarbamate (DDTC) can also be recovered in strongly alkaline medium, but the recovery rate is low. The mechanism analysis results show that, in a weakly alkaline medium, not only the negative shift of Zeta potential on the surface of ammonium dibutyl dithiophosphate (ADD) is significantly higher than that of the other two medicaments, but also the saturated adsorption capacity on the surface of Ag-bearing galena is also the largest. According to the thermodynamic method, the critical pH values for the flotation of Ag-bearing galena in the flotation of ammonium dibutyl dithiophosphate (ADD) and diethyldithiocarbamate (DDTC) are 9.27 and 10.81, respectively, which are consistent with the actual flotation law.
Key words: Ag-bearing galena; flotation; collecting mechanism; recovery rate
