低碱度条件下某新型捕收剂在铜硫矿浮选中的应用

传统铜硫矿浮选工艺中采用大量的石灰,伴随着设备损害、环保问题突出等缺点。采用新型铜捕收剂,在低碱度条件下进行铜硫矿浮选试验研究,在磨矿细度-74μm粒级占65%时,通过条件试验确定药剂制度,经过三次粗选、两次精选的开路试验,可获得铜回收率40.20%、硫回收率2.93%的铜精矿产品,实现了低碱度条件下优先选铜。采用普遍化微扰理论和密度泛函理论计算了新型捕收剂的结构和性能参数。通过与传统捕收剂的参数对比,新型捕收剂的最高占据轨道能量与黄铜矿的最低非占据轨道能量相差较大,捕收力较弱,而最低非占据轨道能量较低,对黄铜矿吸附能力强,对黄铁矿吸附能力弱,选择性较好。

APPLICATION OF A NEW COLLECTOR ON COOPER-SULPHUR SEPERATION AT LOW ALKALINE CONDITIONS

Large amount of lime was used in traditional flotation process of copper sulfide, which caused damage on equipment and other problems, such as environmental protection affects. A new collector was used at low alkaline conditions in flotation. The results show that under the condition that the grinding fineness of -74 micron is 65%, after experiments on the factors such as Calcium Oxide, collector and foaming dosage, the copper recovery rate is 40.20% and the sulfur recovery rate is 2.93% in open circuit test, which realizes the good selecting ability of cooper at low alkaline conditions. The structural information and properties of new collector are analyzed by using the generalized perturbation theory and density functional theory. By comparing with other two collectors, the calculation results indicate that the new collector exhibit lower collecting ability but higher selecting ability for copper sulfide minerals.