Deep reduction recovery of iron from copper slag

Deep reduction recovery of iron from copper slag

Wei Wang Kaifan Zhang Xiaoli Zhou Changlong Wang* Zekun Huo Pengfei Ye Xiuqing Meng 

Logistics Department, Hebei University of Engineering, Handan 056038, China

School of Civil Engineering, Hebei University of Engineering, Handan 056038, China

Jiangxi Key Laboratory of Mining Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China

Tianjin Sunenergy Sega Environmental Science & Technology Co. Ltd., Tianjin 300380, China

Beijing Carbon Fibre Engineering Technology Research Centre, Beijing Bluestar Cleaning Co. Ltd, Beijing 101318, China

Corresponding Author Email:
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31 December 2018
| Citation



This paper explores the effects of reductant, flux, reduction temperature and reduction time on the iron content and iron recovery rate of the deep reduction product from copper slag containing 41.47% of iron. Through a series of tests, it is concluded that reduction temperature and reduction time are leading influencing factors on the two indices of the product. Magnetic metallic iron powder with low S and P contents, high iron content (92.96%) and high iron recovery rate (93.49%) were produced through deep reduction magnetic separation using coke powder as reductant and CaO as flux under 1,300 °C for 2h. The scanning electron microscopy (SEM) and energy-dispersive spectrometry (EDS) patterns show that the metal iron particles were uniform in particle size, regular in shape and simple in intercalation relationship, with no inclusion of other slag phases, making it easy to achieve monomer dissociation by grinding.


copper slag, deep reduction, iron recovery, magnetic separation, metallic iron

1. Introduction
2. Materials and methods
3. Results and discussion
4. Conclusions

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