CAJ | 학술논문

采用平衡法研究了七水硫酸亚铁在黑钛液中的溶解度，通过拟合得到了其溶解度方程，并利用FBRM在线监测溶液结晶情况，测量了其结晶介稳区。通过间歇动态法研究了七水硫酸亚铁的结晶动力学，采用矩量变化法求解了粒数衡算方程，并利用最小二乘法对动力学实验数据进行多元线性回归后得到七水硫酸亚铁成核速率和生长速率方程，结果表明：搅拌速率和降温速率对七水硫酸亚铁结晶过程影响显著，因此，针对搅拌速率和降温速率对结晶工艺的影响进行了分析，并对优化前后七水硫酸亚铁产品进行了对比，发现优化后晶体呈规则的棱形，产品粒度明显增大，小颗粒晶体显著减小。
채용평형법연구료칠수류산아철재흑태액중적용해도，통과의합득도료기용해도방정，병이용FBRM재선감측용액결정정황，측량료기결정개은구。통과간헐동태법연구료칠수류산아철적결정동역학，채용구량변화법구해료립수형산방정，병이용최소이승법대동역학실험수거진행다원선성회귀후득도칠수류산아철성핵속솔화생장속솔방정，결과표명：교반속솔화강온속솔대칠수류산아철결정과정영향현저，인차，침대교반속솔화강온속솔대결정공예적영향진행료분석，병대우화전후칠수류산아철산품진행료대비，발현우화후정체정규칙적릉형，산품립도명현증대，소과립정체현저감소。
The solubility of FeSO4·7H2O in black titanium solution is studied using balance method and the crystallization metastable zone is measured with FBRM online monitoring. The crystallization kinetics of FeSO4·7H2O is investigated with the method of moments through batch cooling crystallization experiments based on the population balance equation. Nucleation rate equation and growth rate equation are obtained by regressing the experimental data with the multiple linear least square method. The key parameters of the crystal size distribution are associated with stirring rate and solution temperature, which can be used to predict and control the crystal size distribution in industrial crystallization process. According to the crystallization kinetics of FeSO4·7H2O, cooling rate and stirring rate have a great effect on crystal size. Cooling crystallization process is carried out under the optimized operating conditions. The results show that the particle size of FeSO4·7H2O increases significantly and small particles reduces greatly, compared to the original process.