中文摘要：

为解决国产硫酸钾粒度小的问题,采用软钾镁矾和氯化钾为原料,分别以不同的加料速率、搅拌速率、反应温度、加入晶种的量进行了反应结晶实验。研究结果表明,随加料速率的增大,硫酸钾晶体的成核速率和生长速率增大,产品平均粒径减小;随搅拌速率的增大,成核速率增大,生长速率减小,产品平均粒径减小;晶体成核速率和生长速率受温度影响较小;随着加入晶种量的增大,晶体成核速率先减小后增大,生长速率先增大后减小,并首次建立了硫酸钾反应结晶动力学模型。在优化条件下,实验产品的平均粒径最大可达394.3μm。

英文摘要：

Reactive crystallization tests using picromerite and po tassium chloride as raw materials were carried out to solve the problem of potassium sulfate with small particle size in China. The conditions of tests included feeding rate, stirring speed, reaction temperature, ratio of crystal seed. The results showed that the nucleation rate and the growth rate rose but the average particle size of potassium sulfate crystals decreased with the increase of the feeding rate. The average particle size and growth rate decreased, while the nucleation rate rose with the accelerating stirring speed. The influence of temperature on the nucleation rate and growth rate was not obvious. With the enhancive amount of crystal seed, the nucleation rate decreased first and then increased, the change of growth rate was opposite. Furthermore, the models of reactive crystallization dynamics of potassium sulfate were proposed for the first time. Under the optimum conditions, the average particle size of the product was up to 394.3 μm.