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建立了粒度为0.038～0.075 mm电炉渣在0.5 mol/L醋酸溶液中恒温水浴浸出过程的动力学模型和浸出产物Ca2+的溶解度模型。研究表明:试验条件下浸出产物的溶解度不是限制浸出反应动力学的控速环节,浸出液中钙离子的转化率随着温度和浸出液浓度的升高而增大;电炉渣醋酸浸出过程动力学模型可用带有自阻系数的Drozdov方程来描述,通过实验数据拟合,模型自阻系数在1.35～1.45范围递增,曲线拟合的相关度大于0.99。根据Arrhenius方程计算得到,电炉渣醋酸浸出过程反应表观活化能为1.743kJ/mol,表明电炉渣醋酸浸出过程是由固态膜扩散控速的。
The kinetic model of the leaching process of Ca (superscript 2+) and the solubility of Ca2 + in the 0.5 mol / L acetic acid solution with a particle size of 0.038-0.075 mm was established. The results show that the solubility of leaching products under the test conditions is not the speed control step to limit the kinetics of leaching reaction. The conversion rate of calcium ions in leaching solution increases with the increase of temperature and leachate concentration. The kinetic model of acetic acid leaching process can be used Drozdov equation with self-impedances, the model self-resistance coefficient increases from 1.35 to 1.45, and the correlation of curve fitting is greater than 0.99. According to the Arrhenius equation, the apparent activation energy of the acetic acid leaching process is 1.743 kJ / mol, indicating that the acetic acid leaching process of the electric furnace slag is controlled by the diffusion of the solid film.