粗精再磨工艺在某高铜镍比矿石选矿中的研究及应用  

Research and Application of Rough Concentrate and Regrinding Technology in Beneficiation of a High Copper Nickel Ratio Ore

作　　者：杨文彪[1] 张永梅 Yang Wenbiao;Zhang Yongmei(Jinchuan Group co.,ltd.,Jinchang,Gansu,China)

机构地区：[1]金川集团股份有限公司,甘肃金昌737100

出　　处：《矿产综合利用》2020年第3期121-125,共5页Multipurpose Utilization of Mineral Resources

摘　　要：本文通过对某硫化铜镍矿的矿石性质调查发现,随着矿石深度开采,矿石中铜镍品位的变化明显,铜镍比由原来的0.64提升到现在的0.9左右。随着铜镍比的增加,一段粗精矿的铜镍品位呈现下降趋势,对一段粗选精矿进行单体解离度分析发现铜镍矿物的单体解离度不够是造成精矿品位降低的主要原因。因此,对一段粗精矿进行磨矿细度、药剂添加等工艺条件的小型试验研究,试验结果表明:(1)相对于其他细度条件,在粗精矿再磨后,细度为-0.043 mm/ 80%和添加丁黄药20 g/t条件下,产生的铜镍精矿的产率、铜镍品位和回收率较高;(2)在粗精矿再磨后不添加捕收剂条件下,随着细度的增加,得到的铜镍精矿产率降低,镍品位和回收率也降低,原因可能是由于磨矿过程中有用矿物表面发生脱药所致;(3)闭路试验结果表明:相对于粗精矿不再磨(细度-0.043 mm /69%),在粗精矿再磨后(细度-0.043 mm /80%)和再磨后添加丁黄药20 g/t条件下,产生的精矿产率提高0.64个百分点,镍品位和回收率分别提高0.63个百分点和4.61个百分点,铜品位和回收率分别提高0.57个百分点和5.54个百分点。通过粗精矿再磨工艺工业应用实践可知:相对于应用前,产生的精矿镍品位和回收率分别提高了0.81个百分点和2.94个百分点,铜品位和回收率分别提高了0.30个百分点和5.85个百分点,同时,精矿中氧化镁含量满足冶炼厂对产品的要求。Through the investigation of the ore properties of a sulfide copper-nickel ore,it is found that with the deep mining of the ore,the grade of copper and nickel in the ore has changed obviously,and the ratio of copper to nickel has increased from 0.64 to about 0.9.With the increase of the ratio of copper to nickel,the grade of nickel and copper produced by on first rough concentrate shows a downward trend.It is found that the main reason for the decrease of the degree of mineral liberation on first rough concentrate.Therefore,a small-scale experimental study on grinding fineness,reagents addition and other technological conditions of first rough concentrate was carried out.The test results showed that:(1)Compared with other fineness conditions,the yield,grade and recovery of copper and nickel concentrate were higher when the fineness was-0.043mm/80%and 20 g/t was added to crude concentrate.(2)Under the condition that no reagents is added after grinding the first rough concentrate.With the increase of fineness,the yield of the concentrate decreased,and the nickel grade and recovery rate also decreased.The reason may be due to the demineralization of the useful mineral surface during the grinding process.(3)Closed-circuit test results show that:Compared with the rough concentrate is no longer grinding(43 um/fineness-69%),after the rough concentrate to grinding(43 um/fineness-80%),and then grinding after adding butyl xanthate under the condition of 20 g/t,the concentrate yield increased by 0.64%,nickel concentrate grade and recovery rate increased by 0.63%and 4.61%respectively,copper grade and recovery rate increased by 0.57%and 5.54%respectively.Through the rough concentrate grinding technology industrial application practice shows that compared with the application before,the nickel concentrate grade and recovery rate increased by 0.81%and 2.94%respectively,copper grade and recovery rate increased by 0.30%and 5.85%,respectively,at the same time,magnesia content in concentrate meet the requirements of smelter for pro

关 键 词：精矿品位 精矿回收率 产率 粗精再磨 

分 类 号：TD952[矿业工程—选矿]