Effect of different calcification agents on vanadium extraction from high-vanadium slag by calcified roasting-acid leaching

doi:10.11835/j.issn.1000-582X.2015.05.022

Home > Archive>Volume 38, Issue 5, 2015 >151-161. DOI:10.11835/j.issn.1000-582X.2015.05.022

Effect of different calcification agents on vanadium extraction from high-vanadium slag by calcified roasting-acid leaching
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                        10.11835/j.issn.1000-582X.2015.05.022
                    
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                        FAN KunFAN Kun
School of Materials & Metallurgy, Northeastern University, Shenyang 110819, P.R.China
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LI ZengchaoLI Zengchao
School of Materials & Metallurgy, Northeastern University, Shenyang 110819, P.R.China
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LI ZishenLI Zishen
School of Materials & Metallurgy, Northeastern University, Shenyang 110819, P.R.China
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WANG WeipengWANG Weipeng
School of Materials & Metallurgy, Northeastern University, Shenyang 110819, P.R.China
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ZHANG WeilingZHANG Weiling
School of Materials & Metallurgy, Northeastern University, Shenyang 110819, P.R.China
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ZHENG HaiyanZHENG Haiyan
School of Materials & Metallurgy, Northeastern University, Shenyang 110819, P.R.China
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SHEN FengmanSHEN Fengman
School of Materials & Metallurgy, Northeastern University, Shenyang 110819, P.R.China
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Fund Project:Supported by National Natural Science Foundation of China (51374061)， Natural Science Foundation of Liaoning Province (201202064) and the Fundamental Research Funds for the Central Universities(N120402004).

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Abstract:

Compared with the traditional technology of vanadium extraction from vanadium slag, a new process of classified roasting-acid leaching is researched in this study. Based on the theoretical analysis on the principle of calcified roasting process, the roasting mechanism and the effect of three kinds of calcification agents (CaSO4, CaCO3 and CaO) on vanadium extraction in the calcified roasting and acid leaching processes are investigated in which high-vanadium slag is used as raw material. Research results show that the leaching ratio of vanadium increases with the increasing of roasting temperature when the temperature is lower than 1 450 K. The leaching ratio reaches maximum at 1 450 K, and then comes down. The best calcification agent composition is 100% CaSO4. By controlling the experimental conditions, the leaching ratio of vanadium in high-vanadium slag can reach 93.53%.

Key words:high-vanadium slag; calcified roasting; calcification agents; leaching; vanadium extraction ratio

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范坤,李曾超,李子申,王炜鹏,章苇玲,郑海燕,沈峰满.不同钙化剂对高钒渣酸浸提钒的影响[J].重庆大学学报,2015,38(5):151~161

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Received:March 15,2015
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Online: November 04,2015
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