MSMPR结晶器中氢氧化镁的结晶动力学研究  

Study on the Kinetics of Crystallization of Magnesium Hydroxide in the MSMPR Crystallizer

作　　者：徐升豪[1] 袁建军[1] 刘林[1] 

机构地区：[1]天津科技大学天津海洋资源与化学重点实验室,天津300457

出　　处：《盐业与化工》2010年第3期9-11,23,共4页Jounral of Salt and Chemical Industry

基　　金：天津市科技支撑重点项目"氨法苦卤综合利用关键技术的研究"(08ZCKFSH02400)

摘　　要：在MSMPR结晶器中利用连续稳态法研究了氢氧化镁的结晶动力学。以粒数密度衡算方程为基础,在假设ΔL定律适用于MSMPR结晶过程的前提下,测量了氢氧化镁晶体的粒数密度n0和晶体的平均粒度L。确定了氢氧化镁的成核速率方程:B°=2.80×109exp(-3.03×104/RT).Δc4.01ΔM0.489;生长速率方程:G=2.94×10-4exp(-6.18×104/RT).Δc4.01动力学方程的分析结果表明,氢氧化镁晶体的生长速率与粒度无关。The crystallization kinetics of magnesium hydroxide was investigated by continuous steady-state method in a MSMPR crystallizer.On the supposition that ΔL law is applicable to the MSMPR crystallization prosess,the density of crystal particle-number n° and the average particle-size was measured based on the theory of population balance.The nuclear rate equation and the the growth rate equation were obtained,B°=2.80×109 exp（-3.03×104/RT）·Δc4.01ΔM0.489;G=2.94×10-4 exp（-6.18×104/RT）·Δc4.01,Analysis of the Kinetic equation showed that the growth rate of magnesium hydroxide was size-independent.

关 键 词：氢氧化镁 结晶器 结晶动力学 成核速率 生长速率 

分 类 号：TQ123.4[化学工程—无机化工]