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电炉渣醋酸溶液浸出过程动力学模型

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Abstract:

建立了粒度为0.038~0.075mm电炉渣在0.5mol/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。

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