某厂铜熔炼渣浮选综合回收金、银和铜的研究与应用

Comprehensive Recovery Study of Gold,Silver and Copper by Beneficiation Technology from Copper Smelting Slag in a Concentrator and Its Application

某选矿厂采用缓冷(空冷+水冷)-浮选工艺回收铜熔炼造锍捕金熔池熔炼渣,研究了缓冷制度、磨矿细度、调整剂用量、捕收剂种类及用量对金、银和铜浮选回收率的影响。结果表明,铜熔炼渣先空冷22 h后水冷40 h;磨矿80 min至细度为-0.074 mm粒级占96.44%(自制活化剂JC-100加入量为200 g/t);浮选调整剂氧化钙用量300 g/t,捕收剂用量丁基黄药为60 g/t、Z-200为160 g/t、自制JC-200为100 g/t,起泡剂2^#油用量为120 g/t;经一粗二扫二精选矿,闭路实验金、银和铜回收率达97.66%、92.71%和94.44%。据此对生产流程进行合理改进后提高了回收率,经济效益明显。

A beneficiation plant in Henan adopted the process of air cooling-water quenching-flotation process to recover gold,sliver and copper in smelting slag,and the effects of slow cooling duration,grinding fineness,flotation modifier dosage,collector type and dosage on gold,silver and copper flotation recovery rates were studied.The copper smelting slag was first cooled down by air for 22 h and then water for another 40 h,then grinded with the self-made activator JC-100 dosage of 200 g/t for 80 min to obtain the particle fineness of-0.074 mm which was account for 96.44%.The flotation process was carried out using 300 g/t of calcium oxide regulator,60 g/t of isobutyl xanthate,160 g/t of Z-200,60 g/t of self-made JC-200 dosage and 120 g/t of foaming agent 2^# oil.The recovery rates were 97.66%,92.71% and 94.44% for gold,silver and copper,respectively after adopting a closed-circuit flowchart consisting of one stage of roughing,two stages of scavenging and two stages of cleaning.After the existing production process was reasonably improved based on these results,the recovery rates were remarkably enhanced,and the economic benefits were obvious.