Journal
MINERAL PROCESSING AND EXTRACTIVE METALLURGY REVIEW
Volume 40, Issue 1, Pages 56-66Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/08827508.2018.1481059
Keywords
High chromium vanadium slag; calcification roasting; acid leaching; response surface method; extraction
Funding
- National Natural Science Foundation of China [51574082, U15022273]
- Fundamental Funds for the Central Universities [150202001, 172507012]
- National Natural Science Foundation of Yunnan Provincial Government [U15022273]
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Calcification roasting-acid leaching were conducted to investigate the extraction behavior of vanadium and chromium from high-chromium vanadium slag (HCVS). The conditions were optimized by response surface methodology (RSM). Results showed that when HCVS and CaO were mixed in m(CaO)/m(V2O5) of 0.62, then roasted from room temperature to 840 degrees C and maintained for 170 min, a maximum vanadium leaching rate of 87.74% was achieved. Additionally, 0.68% chromium was co-leached, achieving the separation of vanadium and chromium. The roasting factors affecting vanadium extraction followed this order: roasting temperature>m(CaO)/m(V2O5)=holding time. For the chromium extraction, the interaction between m(CaO)/m(V2O5) and roasting temperature was significant.
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