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| Carbothermic reduction for recycling of iron and chromium from stainless steel slag |
| QI Qi-song1,2，XU An-jun1,2，HE Dong-feng1,2，PAN Jiang-tao1,2 |
（1. School of Metallurgical and Ecological Engineering，University of Science and Technology Beijing， Beijing 100083， China
2. State Key Laboratory of Advanced Metallurgy，University of Science and Technology Beijing，Beijing 100083， China） |
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Abstract The high temperature carbothermic reduction test of domestic stainless steel slag was conducted， reducing valuable metals. The effects of carbon equivalent， basicity， reaction temperature and thermal insulation time on the reduction ratio of Fe and Cr were studied. Results show that the reduction ratio of Fe and Cr improved with the increase of carbon equivalent and reaction temperature and the reduction of basicity. The highest reduction ratio of Fe and Cr reached at 93.92% and 72.76%， respectively. The reduction ratio was low when the carbon equivalent was less， and with the increase of carbon equivalent， the reduction ratio of Cr raised sharply as the reduction ratio of Fe became stable. The reduction of Fe and Cr became less steep when the basicity ranged from 1.4 to 1.2. When the holding time was over 60 min， there was no significant effect on increasing the reduction ratio of Fe and Cr.
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Received: 28 June 2016
Published: 10 March 2017
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2017, Vol. 52 
