过程工程学报
過程工程學報
과정공정학보
The Chinese Journal of Process Engineering
2010年
3期
548-553
,共6页
李旺兴%赵卓%苏赵辉%李小斌%赵清杰
李旺興%趙卓%囌趙輝%李小斌%趙清傑
리왕흥%조탁%소조휘%리소빈%조청걸
metallurgical reaction engineering%leaching%kinetics%calcium vanadate
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.
