According to the chemical and phase composition of the nickel-copper-iron matte containing precious metals and the progress in enrichment of precious metals from the nickel-copper-iron matte containing precious metals at home and abroad,this paper put forward the process route of enrichment of precious metals and selectively leaching of base metals from the nickel-copper-iron matte by sulfuric acid and sodium hypochlorite.The effects of particle size,leaching temperature,leaching time,amount of sulfuric acid and sodium hypochlorite on the leaching rate of nickel,cobalt,copper and iron are mainly discussed.The results show that raw material particle size has significantly effects on the leaching rate of base metals,high leaching rate of base metals and enrichment of precious metals are obtained with the suitable particle size.Through the experiments,the reasonable experiment parameters and conditions were determined as fellows:particle size of-200 to +250 mesh,leaching temperature 95℃,leaching time 5 h,sulfuric acid concentration 30％,adding amount of sodium hypochlorite 3 times of matte weight.Under these experiment parameters and conditions,the leaching rate of nickel,cobalt,copper and iron were 97.39％,96.24％,98.30％ and 99.01％,respectively.The content of nickel,cobalt,copper,iron in the leaching residues was 8.15％,0.23％,1.40％ and 0.24％,respectively.The content of Pt,Pd,Au,Ag and Rh in the leaching residues was 247 g/t,521 g/t,112 g/t,494 g/t and 24 g/t,respectively.The content of Pt,Pd,Au,Ag and Rh in the leaching solution was ＜0.0005 g/L,0.0023 g/L,0.0007 g/L,＜0.0005 g/L and 0.00017 g/L,respectively.This process has advantages as follows:a small investment,simple technology,high enrichment efficiency.
参考文献
| [1] | Huang Zhenhua;Chen Yanyang;Ju Huifang .Study on high mattes refining process and production practice in Fukang smelter[J].Xinjiang Nonferrous Metals,1997,47(03):25-32. |
| [2] | Li Chunlei.Review on industrialization of the hydrometallurgy for high mattes refining in Fukang smelter[J].China Nonferrous Metal,2007(03):20-24. |
| [3] | Ma Yuxin .Study on acid leaching under pressure on copper slag in Fukang smelter[J].Xinjiang Nonferrous Metals,1999,51(02):27-32. |
| [4] | J.L. Provis;J.S.J. van Deventer;J.A.M. Rademan .A kinetic model for the acid-oxygen pressure leaching of Ni-Cu matte[J].Hydrometallurgy,2003(1/3):83-99. |
| [5] | J.A.M.Rademan .The leaching characteristics of Ni-Cu matte in the acid-oxygen pressure leach process at Impala Platinum[J].Hydrometallurgy,1999(3):231-252. |
| [6] | FAN Chuan-lin,LI Bin-chuan,FU Yan,ZHAI Xiu-jing.Kinetics of acid-oxygen leaching of low-sulfur Ni-Cu matte at atmospheric pressure[J].中国有色金属学报（英文版）,2010(06):1166-1170. |
| [7] | Kyung-Ho Park;Debasish Mohapatra;B. Ramachandra Reddy .A study on the oxidative ammonia/ammonium sulphate leaching of a complex (Cu-Ni-Co-Fe) matte[J].Hydrometallurgy,2007(3/4):164-171. |
| [8] | Yan Mingying.New hydrometallurgical process test for high mattes[J].Si Chuan Nonferrous Metal,1998(02):19-24. |
| [9] | 罗远辉,王颖,黄小珂,蒋汉瀛,杨松青.高冰镍浸出机理及工艺研究[J].有色金属(冶炼部分),2002(01):2-6. |
| [10] | Li Jinli;Zhang Mingjie;Wang Hongkuan .Leaching out high mattes by ferric chloride[J].Journal of Northeastern University:Natural Science,1998,19(02):152-154. |
| [11] | Chen H .The oxidative leaching of nickel matte with manganese-containing oxide ores[J].Hydrometallurgy,1996,42(03):425-434. |
| [12] | 李少龙.氯化浸出工艺在高镍锍浸出系统中的应用[J].中国有色冶金,2010(05):21-24. |
| [13] | Kyung-Ho Park;Debasish Mohapatra;Kim Hong-In et al.Dissolution behavior of a complex Cu-Ni-Co-Fe matte in CuC12-NaC1-HC1 leaching medium[J].Hydrometallurgy,2007,56(03):303-310. |
| [14] | Yang Xianwan;Li Dunfang;He Aiping et al.Thermodynamics of chlorine leaching of nickel matte[J].Non-ferrous Metallurgy,1994,46(01):45-50. |
| [15] | Huang Zhongsen;Wang Hanyuan;Jiang Peihai et al.A hydrometallurgical process for slurry electrolysis of copper nickel high grade metal[J].Mining and Metallurgy,1999,8(02):39-43. |
| [16] | Liu Silin;Chen Qushan;Feng Zhijie et al.Concentration of precious metals in nickel carbonylation processes[J].Nonferrous Metals,1998,50(03):80-83. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%