期刊
JOURNAL OF CENTRAL SOUTH UNIVERSITY OF TECHNOLOGY
卷 18, 期 6, 页码 1940-1944出版社
JOURNAL OF CENTRAL SOUTH UNIV TECHNOLOGY
DOI: 10.1007/s11771-011-0926-9
关键词
vanadium; stone coal; salt-roasting; chlorine curing
资金
- Development and Reform Commission of Guizhou Province, China [2007GH001]
In order to reduce the pollution of Cl(2) and HCl released during extracting vanadium from stone coal by sodium chloride roasting, a modified salt-roasting process was proposed by adding calcined lime in roasting process followed by H(2)SO(4) leaching. The effects of parameters including roasting temperature, roasting time, addition mass ratio of NaCl, calcined lime upon leaching rate of vanadium and curing rate of chlorine were investigated, and the effects of leaching time and leaching temperature on leaching rate of vanadium were also studied. The results show that the vanadium leaching rate and the curing rate of chlorine are 67.3% and 51.5% (mass fraction), respectively, at roasting temperature of 750 A degrees C, roasting time of 4 h, 15% sodium chloride and 8% (mass fraction) calcined lime, leaching temperature of room temperature, and leaching time of 4 h.
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