Non-Roasting Pressure Acid-Leaching Process of Vanadium SlagChinese Full Text
Yu Bin;Sun Zhaohui;Zhang Tingan;Xian Yong;Mu Wangzhong;Tang Hongjian;State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization,Panzhihua Iron and Steel Group Research Institute Company;Ministry of Education Key Laboratory of Ecological Utilization of Multi-Metal Intergrowth Ores,School of Materials and Metallurgy,Northeastern University;
Abstract: As the roasting-leaching process produced large amounts of metallurgical wastes,"non-roasting acid leaching"process for vanadium slag was studied experimentally. The leaching temperature,the ratio of liquid to solid,the leaching time,the initial acid concentration and the stirring speed were tested to measure the leaching rates of V,Ti and Fe of vanadium slag. The possibility of reactions between components and H2SO4,the theoretical limits of valuable metal transferred into the solution and the steady state of products were analyzed using E-p H diagram of V-Fe-H2 O system under high temperature conditions. The results showed that Fe O·V2O3could be leached out in the form of VO2 +when p H ＜ 1. 5 in the stable area of H2 O and Fe2 +,and the optimum process parameters for obtaining vanadium slag with particle size of- 0. 075 + 0. 055 mm were: leaching temperature of 130 ℃,liquid to solid ratio of 10∶1,leaching time of 90 min,initial acid concentration of 200 g·L- 1,and stirring speed of 500 r·min- 1. As a result,the leaching rates in non-roasting acid leaching process were 96. 63%,92. 33% and 15. 95% for V,Fe and Ti,respectively,with Ti enriched in the leaching residue.
- DOI：
10.13373/j.cnki.cjrm.2014.06.031
- Series：
- Subject：
- Classification Code：
TF803.21
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