甘肃某缓冷冶炼渣浮选试验研究  

Experimental Study on Flotation of a Slow Cooling Smelting Slag in Gansu Province

作　　者：鲁鹏[1] LU Peng(Baiyin Nonferrous Group Co.Ltd.,Baiyin 730900,China)

机构地区：[1]白银有色集团股份有限公司,甘肃白银730900

出　　处：《甘肃冶金》2024年第4期18-21,26,共5页Gansu Metallurgy

摘　　要：甘肃某铜业公司铜冶炼缓冷渣含Cu 1.65%,MgO、Al_(2)O_(3)含量相对较高,分别为3.22%和4.23%。MgO和Al_(2)O_(3)含量较大时,易导致泡沫黏度大,铜富集效果差,也会促进渣非晶质的生成,妨碍硫化物颗粒的沉淀生长,对铜回收效果不利,造成铜物相粒度变细。在阶段磨矿阶段选别工艺中,在粗选Ⅰ作业添加六偏磷酸钠,粗选Ⅱ作业中添加硫化钠,实现粗选Ⅰ作业获得合格铜精矿的同时,可显著提高铜矿物的浮游速度。将二段磨矿细度提高至-325目98%时,可将选铜尾矿含铜品位进一步降低。试验结果表明:闭路流程获得了Cu品位20.64%、Cu回收率84.34%的铜精矿,选铜尾矿含Cu 0.239%,产品符合铜冶炼要求,试验指标较好。The slow-cooling slag of a copper smelting company in Gansu Province contains 1.65%copper,and the contents of MgO and Al_(2)O_(3) are relatively high,which are 3.22%and 4.23%respectively.When the content of MgO and Al_(2)O_(3) is large,it is easy to lead to large foam viscosity,poor copper enrichment effect,but also promote the formation of slag amorphous,hinder the precipitation growth of sulfide particles,adverse to the copper recovery effect,resulting in copper phase granularity.In the stage grinding stage separation process,the addition of sodium hexametaphosphate in roughing I operation and sodium sulfide in roughing II operation can achieve qualified copper concentrate in roughing I operation,and at the same time,the floating speed of copper ores can be significantly increased.When the fineness of the second stage grinding is increased to-325 mesh 98%,the copper grade of the copper separation tailings can be further reduced.The test results show that copper concentrate with 20.64%copper grade and 84.34%copper recovery was obtained in the closed circuit process,and the copper tailings contained 0.239%copper.The product meets the requirements of copper smelting and the test index is good.

关 键 词：缓冷渣 浮选 六偏磷酸钠 异戊基黄药 快速浮选 

分 类 号：TD923[矿业工程—选矿]