Title: Highly efficient utilization of hazardous vanadium extraction tailings containing high chromium concentrations by carbothermic reduction
Abstract: We develop a novel approach to recover chromium and iron from hazardous vanadium extraction tailings containing high chromium concentrations by synergistic carbothermal reduction of the mixture of chromite and the vanadium extraction tailings. Experiments show that the recoveries of chromium and iron reach 97.81% and 96.82%, respectively, and decrease with increasing mass ratio of chromite and high chromium type vanadium extraction tailings. The recoveries of chromium and iron are higher when graphite powder is used as reductant. The contents of impurity elements C, Si, S and P fluctuate within a small range and satisfy the requirements of national standards. The addition of CaO can greatly reduce the sulfur content in the high carbon ferrochromium product. 98.34% Cr (VI) and 100% V in the tailings were converted during the reduction process. It is demonstrated that carbothermal reduction could efficiently detoxify Cr(VI) in vanadium extraction tailings containing high chromium concentrations.
Publication Year: 2019
Publication Date: 2019-11-01
Language: en
Type: article
Indexed In: ['crossref']
Access and Citation
Cited By Count: 40
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