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为了研究电炉渣吸收CO2时电炉渣粒度分布对钙浸出率及过程控速的影响,以平均颗粒尺寸为20μm,不同偏离系数(CV)的电炉渣为研究对象,建立了电炉渣在0.05 mol/L醋酸溶液中的浸出动力学模型,并利用Mathematica8.0对模型进行了求解,并通过试验验证了模型的准确性。仿真结果表明,电炉渣在浸出70 min时,钙浸出率基本稳定,在浸出前70 min,浸出反应速率随着偏离系数的增大而增大,70 min后则随着偏离系数的增大而减小。随着电炉渣偏离系数的增大,电炉渣浸出过程受到化学反应控速越来越弱,而受到扩散控速先变强后变弱,在CV=0.7时扩散控速最强。通过试验数据与仿真结果对比,证明所建立的基于Gamma粒度分布的电炉渣钙浸出率动力学模型能较好的反映电炉渣在醋酸溶液中的浸出过程。
In order to study the effect of slag size distribution on the leaching rate of calcium and process control speed, the slag with average particle size of 20μm and different deviation coefficient (CV) L acetic acid solution leaching kinetics model, and the use of Mathematica8.0 model was solved, and tested by the model’s accuracy. The simulation results show that the leaching rate of the electric furnace slag is basically stable after leaching for 70 min. The leaching reaction rate increases with the deviation coefficient at 70 min before leaching, and increases with the deviation coefficient after 70 min Decrease With the increase of deviating coefficient of EAF, the control of EAF slag leaching process is weaker and weaker by controlling the chemical reaction rate, but weakening by the diffusion control speed, and the diffusion control speed is the strongest at CV = 0.7. By comparing the experimental data with the simulation results, it is proved that the kinetic model of calcium leaching rate based on Gamma particle size distribution can reflect the leaching process of EAF slag in acetic acid solution.