某含铜金精矿预处理过程中的铜、铁浸出
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摘要
研究"硫酸化焙烧—酸浸—氰化"和"L-SX-EW"联合工艺处理含铜金精矿过程中,焙烧温度、酸浸酸度对铜、铁浸出率和酸浸液中Fe~(3+)浓度的影响。结果表明,在硫酸化焙烧温度为650℃、焙烧时间1 h、初始酸浸酸度40 g/L、浸出液固比3∶1、浸出温度85℃、浸出时间1 h条件下,铜、铁的浸出率分别为大于96%、21%,酸浸液中的Fe~(3+)浓度2.87 g/L。表明在不改变原有工艺的基础上通过调整焙烧温度和酸浸酸度两个关键工艺参数,可以达到提高铜浸出率的同时兼顾降低Fe~(3+)浓度的目标。
In the process of roasting-acid leaching-cyanidation and L-SX-EW combined treatment of copper-bearing gold concentrate,the effect of calcination temperature and acid leaching acidity on leaching rate of copper,iron and Fe~(3+) concentration in acid leaching solution. Experimental results show that the calcination temperature of 650 ℃,the roasting time of 1 h,the initial concentration of acid of40 g/L,the acid leaching ratio of liquid to solid of 3∶ 1,the acid leaching temperature of 85 ℃ and the acid leaching time of 1 h. The leaching rate of copper is greater than 96%,the leaching rate of iron is21% and the concentration of the acid leaching solution Fe~(3+) is 2. 87 g/L. It shows that by adjusting the two key process parameters of calcination temperature and acid leaching acidity on the basis of not changing the original process, the goal of enhancing the copper leaching rate and decreasing the concentration of Fe~(3+) can be achieved.
In the process of roasting-acid leaching-cyanidation and L-SX-EW combined treatment of copper-bearing gold concentrate,the effect of calcination temperature and acid leaching acidity on leaching rate of copper,iron and Fe~(3+) concentration in acid leaching solution. Experimental results show that the calcination temperature of 650 ℃,the roasting time of 1 h,the initial concentration of acid of40 g/L,the acid leaching ratio of liquid to solid of 3∶ 1,the acid leaching temperature of 85 ℃ and the acid leaching time of 1 h. The leaching rate of copper is greater than 96%,the leaching rate of iron is21% and the concentration of the acid leaching solution Fe~(3+) is 2. 87 g/L. It shows that by adjusting the two key process parameters of calcination temperature and acid leaching acidity on the basis of not changing the original process, the goal of enhancing the copper leaching rate and decreasing the concentration of Fe~(3+) can be achieved.
引文
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[14]张玉明,张福元,熊领领.含铜金精矿硫酸化焙砂两段浸出实验研究[J].中国有色冶金,2014,43(4):76-79.
[15]衷水平.含铜难处理金精矿焙烧-酸浸-氰化提金工艺研究[J].黄金科学技术,2013,21(2):82-85.
[16]王瑞祥,曾斌,余攀,等.多金属复杂金精矿硫酸化焙烧热力学分析[J].黄金,2013(12):47-51.
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[18]金正聪.浅析电铜厂铁离子控制方法[J].有色矿冶,2012,28(1):27-29.
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[2]姜涛,罗淑华.铜矿物类型对金氰化浸出影响的研究[J].黄金,1990,11(8):25-29.
[3]崔日成,杨洪英,陈森,等.难处理金矿中伴生矿物对氰化浸出的影响[J].东北大学学报(自然科学版),2011,32(9):1291-1294.
[4]柳建设,王淀佐.铜萃取过程污物的形成机理研究[J].矿冶工程,2002,22(2):89-92.
[5]柳建设,方金渭,邱冠周,等.铜萃取过程第三相形成机理及防治方法研究[J].铜业工程,2000(2):29-33.
[6]DAS S C,KRISHNA P G.Effect of Fe(III)during copper electrowinning at higher current density[J].International journal of mineral processing,1996,46(1):91-105.
[7]北京有色冶金设计研究总院.重有色金属冶炼设计手册.铜镍卷[M].北京:冶金工业出版社,1996:353.
[8]宋佥.铜堆浸-溶剂萃取-电积过程的操作管理[J].中国有色冶金,2004,33(6):6-8.
[9]郭持皓,袁朝新,孙聪.高铜金精矿提取金铜工艺研究[J].有色金属(冶炼部分),2010(6):37-40.
[10]王令明.一种从硫化锌精矿直接浸出锌同时除铁的方法[J].铜业工程,2014(1):21-22.
[11]张爱黎,杨春芳,符岩,等.铜厂副产品硫酸镍中除铁的研究[J].有色矿冶,2001,17(2):23-26,22.
[12]赵继云.铁在铜萃取电积中的影响[C]//云南:云南铜业矿山技术论文发布会,2008.
[13]谭希发.含铜金精矿热压预氧化—氰化综合回收金铜实验[J].有色金属(冶炼部分),2016(11):45-48.
[14]张玉明,张福元,熊领领.含铜金精矿硫酸化焙砂两段浸出实验研究[J].中国有色冶金,2014,43(4):76-79.
[15]衷水平.含铜难处理金精矿焙烧-酸浸-氰化提金工艺研究[J].黄金科学技术,2013,21(2):82-85.
[16]王瑞祥,曾斌,余攀,等.多金属复杂金精矿硫酸化焙烧热力学分析[J].黄金,2013(12):47-51.
[17]孙聪,袁朝新.某难处理金精矿焙烧预处理提取金和铜[J].有色金属工程,2012,2(3):36-38.
[18]金正聪.浅析电铜厂铁离子控制方法[J].有色矿冶,2012,28(1):27-29.
[19]南君芳,李林波,杨志祥.金精矿焙烧预处理冶炼技术[M].北京:冶金工业出版社,2010:71-73.
[20]黄礼煌.化学选矿[M].北京:冶金工业出版社,2012:54-55.