四川某氧化铅锌矿石浮选试验

Flotation Experiment on a Lead-zinc Oxidized Ore from Sichuan

四川某氧化铅锌矿石铅、锌品位分别为3.60%和9.19%,矿石氧化程度非常高,铅、锌氧化率高达90%左右,且主要铅、锌矿物嵌布粒度微细,属难选铅锌矿石。为确定该矿石的合理选矿工艺,对矿石进行了选矿试验。结果表明,在磨矿细度为-325目占96.74%情况下,以硫化钠为铅矿物硫化剂、戊基黄药为浮铅捕收剂,以硫化钠为锌矿物硫化剂、硝酸银为活化剂、水玻璃为矿泥分散剂和脉石矿物抑制剂、十八胺为浮锌捕收剂,采用1粗1扫3精选铅、1粗2扫3精选锌、中矿闭路返回流程处理该矿石,可获得铅品位为48.61%、回收率为86.15%的铅精矿,锌品位为40.14%、回收率为65.04%的锌精矿。

There is 3. 60% lead and 9. 19% zinc in a lead-zinc oxide ore from Sichuan. The oxide rate of lead and zinc is above 90%. It is fine-grained dissemination,being a refractory lead-zinc ore. Experimental study was conducted to provide technique basis for the exploitation and utilization of the ore. Results show that at the grinding fineness of 96. 74% passing 325 mesh,lead concentrate with lead grade of 48. 61%,recovery of 86. 15%,zinc concentrate with zinc grade of 40. 14%,recovery of 65. 04% was obtained by the process of one-roughing,three-cleaning,one-scavenging using Na2 S as regulator,amyl-xanthate as lead collector to preferential floating lead,and lead flotation tailings via the process of one-roughing,three-cleaning,twoscavenging with Na2 S as sulfurizing reagent,Ag NO3 as activator,sodium silicate as dispersants and inhibitors for gangue minerals,octadecylamine as collector to select zinc.