|
|
|
| Recovery of iron and copper from copper tailings by coal-based direct reduction and magnetic separation |
| Chao Geng1,2,Hua-jun Wang1,*,Wen-tao Hu1,Li Li1,Cheng-shuai Shi1 |
1 School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
2 Key Laboratory for Solid Waste Management and Environment Safety, Ministry of Education of China, School of Environment,Tsinghua University, Beijing 100084, China |
|
|
|
|
Abstract A technique comprising coal-based direct reduction followed by magnetic separation was presented to recover iron and copper from copper slag flotation tailings. Optimal process parameters, such as reductant and additive ratios, reduction temperature, and reduction time, were experimentally determined and found to be as follows: a limestone ratio of 25%, a bitumite ratio of 30%, and reduction roasting at 1473 K for 90 min. Under these conditions, copper-bearing iron powders (CIP) with an iron content of 90��11% and copper content of 0��86%, indicating iron and copper recoveries of 87��25% and 83��44% respectively, were effectively obtained. Scanning electron microscopy and energy dispersive spectroscopy of the CIP revealed that some tiny copper particles were embedded in metal iron and some copper formed alloy with iron, which was difficult to achieve the separation of these two metals. Thus, the copper went into magnetic products by magnetic separation. Adding copper into the steel can produce weathering steel. Therefore, the CIP can be used as an inexpensive raw material for weathering steel.
|
|
Received: 27 October 2016
Published: 18 October 2017
|
|
|
|
| [1] |
J. Sun, Z. Huang, N. Yang, Y. Liu and C. Jiao: Mining R and D, 36(2016), 68-74.
|
| [2] |
G. Bipra and J. Premchand: Conserv. Recy, 39(2003), 299-305.
|
| [3] |
C. Shi, C. Meyer and A. Behnood:Conserv. Recy, 52(2008), NO.6, 1115-1121.
|
| [4] |
K. S. Al-Jabri, M. Hisada, S. K. Al-Oraimi and A. H. Al-Saidy: Cem. Concr. Compos., 31(2009), 483-489.
|
| [5] |
J. C. Castilla: Environ. Monit. Assess., 40(1996), 171-178.
|
| [6] |
B. S. Thomas, A. Damare and R.C. Gupta: Constr. Build. Mater., 48(2013), 894-901.
|
| [7] |
M. M. Antonijevi?, M. D. Dimitrijevi?, Z. O. Stevanovi?, S. M. Serbula and G. D. Bogdanovic: J. Hazard. Mater., 158 (2008), 23-29.
|
| [8] |
Z. Guo, D. Zhu, J. Pan, T. Wu and F. Zhang: Metals, 6(2016), 86-92.
|
| [9] |
C. Zhang, T. Zhou, Q. Wu, H. Zhu and P. Xu: Asian J. Chem., 26(2014),1371-1377.
|
| [10] |
H. Cao, N. Fu, C. Wang, L. Zhang, F. Xia and Z. Sui and N. Feng: Multi. Utiliz. of Miner. Resour., 2(2009): 8-13.
|
| [11] |
J. Shahu, S. Patel, and A. Senapati: J Mater. Civil. Eng., 25 (2013), 1871-1877.
|
| [12] |
W.C. Liu, J.K. Yang and B. Xiao: J. Hazard. Mater., 161 (2009), 474-480.
|
| [13] |
C. Li, H. H. Sun, J. Bai, L. T. Li: J. Hazard. Mater., 174 (2010), 71-78.
|
| [14] |
H. Yang, L. Jing and B. Zhang: J. Hazard. Mater.J., 185(2011), 1405-1411.
|
| [15] |
Z. Q. Gong, S. Gong and B. Zhou: Mine. Metall. Eng., 26 (2006), 45-51.
|
| [16] |
W. P. Jin, C. A. Joong and H. Song: Resour. Conserv. Recy., 34 (2002),129-136.
|
| [17] |
H. G. Dong, Y. F. Guo and T. Jiang: Mine. Metall. Eng., 28 (2008), 37-45.
|
| [18] |
B. Xu, E. Wang and J. Yang: Conserv. Utiliz. Miner. Res. 3 (2007), 51-59.
|
| [19] |
W. Yu, T. Sun, Q. Cui, C. Xu and J. Kou: ISIJ Int., 55 (2015), 536-544.
|
| [20] |
Q. Zhanga, J. Wu, J. Wang, W. Zheng, J. Chen and A. Li: Mater. Chem. Phys., 77(2003): 603-611.
|
| [21] |
T. Kamimura, S. Hara, H. Miyuki, M. Yamashita and H. Uchida: Corros. Sci., 48 (2006), 2799-2806.
|
| [22] |
C. Zhang, D. Cai, B. Liao, T. Zhao, Y. Fan: Mater. Lett., 58(2004), 1524-1530.
|
| [23] |
A. U. Leuenberger-Minger, B. Buchmann, M. Faller, P. Richner and M. Z?beli: Corros. Sci., 44(2002), 675-683.
|
| [24] |
K. Maweja, T. Mukongo and I. Mutombo: J. Hazard.Mater., 164 (2009) 856-863.
|
| [25] |
X. Huang: Iron and Steel Metallurgy Principles, 2nd ed., Metallurgy Industry Press, Beijing, (2011), 273-281.
|
| [26] |
J. Moon and V. Sahajwalla: Metall. Mater. Trans. B, 37B(2006), 215-223.
|
| [27] |
W. Yu, T. Sun, J. Kou, Y. Wei, C. Xu and Z. Liu: ISIJ Int., 53( 2013), 427-432.
|
| [1] |
Jian-wen Yu*,Yue-xin Han**,Peng Gao,Yan-jun Li. Recovery of boron from high-boron iron concentrate using reduction roasting and magnetic separation[J]. Chinese Journal of Iron and Steel, 2017, 24(2): 131-137. |
| [2] |
Qiang Zheng,Xue Bian,Wen-yuan Wu*. Iron recovery and rare earths enrichment from Bayan Obo tailings using Coal-Ca(OH)2-NaOH roasting followed by magnetic separation[J]. Chinese Journal of Iron and Steel, 2017, 24(2): 147-155. |
| [3] |
Chao Geng,Ti-chang Sun*,You-wen Ma,Cheng-yan Xu,Hui-fen Yang. Effects of embedding direct reduction followed by magnetic separation on recovering titanium and iron of beach titanomagnetite concentrate[J]. Chinese Journal of Iron and Steel, 2017, 24(2): 156-164. |
| [4] |
Yuan-pei Lan,Qing-cai Liu,*,Fei Meng,De-liang Niu,Heng Zhao. Optimization of magnetic separation process for iron recovery from steel slag[J]. Chinese Journal of Iron and Steel, 2017, 24(2): 165-170. |
| [5] |
Xiao-ming XIAO,Yun PENG,Cheng-yong MA,Zhi-ling TIAN. Effects of Alloy Element and Microstructure on Corrosion Resistant Property of Deposited Metals of Weathering Steel[J]. Chinese Journal of Iron and Steel, 2016, 23(2): 171-177. |
| [6] |
Yong-li LI,,Jing-kui QU,,Guang-ye WEI,,Tao QI,. Influence of Na2CO3 as Additive on Direct Reduction of Boron-bearing Magnetite Concentrate[J]. Chinese Journal of Iron and Steel, 2016, 23(2): 103-108. |
|
|
|
|
2017, Vol. 24 
