甘肃某低品位金矿石综合回收有价矿物的试验研究

摘要

In order to improve the mineral recovery rate of a gold mine in Gansu Province,two technology schemes were applied to processing ores which include the flotation-concentrate cyaniding and the all slime cyaniding.By comparing the overall metallurgical recoveries of them,the technology schemes of flotation and concentrate was ultimately determined,which have been considered from the aspects of technical and economic. The tests show that under the premise of ensuring the total flotation time in 20 minutes,the slurry concentration of 33%and the grinding fineness-200 above 55%were set at the production site.The pharmacy conditions also was butyl xanthate 100 g/t and butyl aerofloat 80 g/t.And the concentrate cyaniding conditions should be kept at the mesh fineness -400 above 90%,the cyanide concentration of 65‰,the cyanide leaching time of 36 hours, and the slurry concentration of 30%to 35%.Finally,it can obtain good indicators of the cyanide overall recovery of 95.43%.%为了提高甘肃某金矿选矿回收率，采用浮选+精矿氰化法与全泥氰化法2种工艺方案进行矿石处理，通过对比二者选冶总体回收率，从技术及经济方面综合考虑，最终确定采用先浮选后精矿氰化方法处理金矿石。试验表明，在保证总浮选时间为20 min的前提下，设定生产现场的浮选条件为矿浆浓度33%，磨矿细度-200目占55%以上，丁基黄药100 g/t，丁铵黑药80 g/t。精矿氰化条件应保持在细度-400目占90%以上，氰化物浓度为6.5‰，氰化时间为36 h，浸出矿浆浓度为30%~35%的氰化浸出条件下，可取得氰化总体回收率为95.43%的较好指标。