铬渣NaCl浸出动力学
来源期刊：中南大学学报(自然科学版)2007年第3期
论文作者：柴立元 赵堃 舒余德 朱文杰
文章页码：445 - 445
关键词：铬渣；NaCl；浸出；动力学
Key words：chromium-containing slag; NaCl; leaching; kinetics
摘 要：通过研究铬渣NaCl浸出过程中Cr(Ⅵ)浓度随时间的变化，建立该反应的动力学方程，确定初始pH值、振荡速度对反应速率常数的影响，并计算相应的反应表观活化能。结果表明，铬渣NaCl浸出过程为0.26级反应，反应速率常数为3.38×10-7 mol/(L·s)；pH值和振荡速度增大，反应速率常数不断增大，CaCrO4溶解率增加，溶解速率加快；该反应的表观活化能为34.24 kJ/mol，Cr(Ⅵ)浸出速率受温度影响较大。
Abstract: The effects of initial pH value and shaking speed on reaction rate constant were confirmed with the change of Cr(Ⅵ) concentrations in leaching chromium-containing slag process by NaCl. Kinetic equation was established and the corresponding apparent activation energy was calculated. The results indicate that the leaching process is a 0.26 order reaction, and the reaction rate constant is 3.38×10-7 mol/(L·s). The reaction rate constant increases with the increase of pH value and shaking speed. And dissolution rate of CaCrO4 increases too. The apparent activation energy is 34.24 kJ/mol and temperature has great influence on Cr(Ⅵ) leaching rate.
基金信息：国家自然科学基金资助项目
教育部高等学校博士点专项科研基金资助项目
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