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›› 2010, Vol. 10 ›› Issue (3): 548-553.

• 过程与工艺 • 上一篇    下一篇

Leaching Kinetics of Calcium Vanadate by Na2CO3 Solution

李旺兴 赵卓 苏赵辉 李小斌 赵清杰   

  1. 中国铝业股份有限公司 郑州轻金属研究院 中国铝业郑州研究院 湖南省中南大学冶金科学与工程学院 中国铝业郑州研究院
  • 收稿日期:2010-01-11 修回日期:2010-03-26 出版日期:2010-06-20 发布日期:2010-06-20
  • 通讯作者: 李旺兴

Leaching Kinetics of Calcium Vanadate by Na2CO3 Solution

LI Wang-xing ZHAO Zhuo SU Zhao-hui, LI Xiao-bin ZHAO Qing-jie   

  1. Zhengzhou Research Institute of Chalco Zhengzhou Research Institute School of Metallurgical Science and Engineering, Central South University School of Metallurgical Science and Engineering, Central South University School of Metallurgical Science and Engineering, Zhengzhou Research Institute
  • Received:2010-01-11 Revised:2010-03-26 Online:2010-06-20 Published:2010-06-20
  • Contact: LI Wang-xing

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摘要： Leaching kinetics of calcium vanadate by Na2CO3 solution was studied. Kinetic equation was established according to the variation of VO3- concentration with time during the leaching process. The influences of initial pH value and stirring speed on reaction rate constant were examined and the corresponding apparent activation energy was calculated. The results indicate that the leaching process is a 0.68 order reaction, and the reaction rate constant 8.64′10-6 mol/(L×s). It increases with the increase of pH value and stirring speed. And the dissolution rate of calcium vanadate also increases. The apparent activation energy is 38.98 kJ/mol, and temperature has great influence on the leaching rate of calcium vanadate.

关键词: metallurgical reaction engineering, leaching, kinetics, calcium vanadate

Abstract: Leaching kinetics of calcium vanadate by Na2CO3 solution was studied. Kinetic equation was established according to the variation of VO3- concentration with time during the leaching process. The influences of initial pH value and stirring speed on reaction rate constant were examined and the corresponding apparent activation energy was calculated. The results indicate that the leaching process is a 0.68 order reaction, and the reaction rate constant 8.64′10-6 mol/(L×s). It increases with the increase of pH value and stirring speed. And the dissolution rate of calcium vanadate also increases. The apparent activation energy is 38.98 kJ/mol, and temperature has great influence on the leaching rate of calcium vanadate.

Key words: metallurgical reaction engineering, leaching, kinetics, calcium vanadate

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