(1. 福州大學 紫金礦業(yè)學院，福州 350108；
2. 福州大學-紫金礦業(yè)集團礦產資源綜合利用聯(lián)合研發(fā)中心，福州 350108)
摘 要: 針對異極礦難以硫化的問題，采用鉛離子(Pb2+)對其進行預先活化，研究黃藥體系下的浮選行為和強化硫化機理。結果表明：與常規(guī)硫化(硫化+重金屬活化)相比，添加適量Pb2+的預處理對異極礦硫化有強化作用，不但可以提高異極礦回收率，還能降低硫化鈉用量，而脈石礦物石英幾乎不受影響；Pb2+的活化機理表現(xiàn)在Pb2+可吸附在異極礦表面增加硫化活性位點，當加入硫化鈉以后可迅速生成硫化鉛(PbS)，并對后續(xù)PbS的形成具有誘導結晶作用，使得表面生成更多的PbS晶體，從而達到強化硫化目的。
關鍵字: 異極礦；鉛離子；強化硫化；誘導結晶
（1. School of Zijin Mining, Fuzhou University, Fuzhou 350108, China;
2. Fuzhou University-Zijin Mining Group Joint Research Center for Comprehensive Utilization of Mineral Resources, Fuzhou 350108, China）
Abstract:In view of the difficulty in sulfidation of hemimorphite, lead ions were used to pre-activate it. The flotation behavior and strengthening sulfidation mechanism in xanthate system were studied. The results show that, compared with conventional sulfidation (sulfidation + activation by heavy metal), the pretreatment of appropriate amount of Pb2+ can strengthen the sulfidation of hemimorphite, which not only improves the recovery, but also reduces the dosages of sodium sulfide, while the gangue mineral (quartz) is almost unaffected. The activation mechanism of lead ions is as follows: lead ions can be adsorbed on the surface of hemimorphite to increase the sulfidation active sites. When sodium sulfide is added, lead sulfide can be rapidly generated which has the effect of induced crystallization for the subsequent formation of lead sulfide. Thus more PbS crystals can be formed on the surface, so as to achieve the purpose of strengthening sulfidation.
Key words: hemimorphite; lead ions; strengthening sulfidation; induced crystallization
