摘要
以Ｃａ（ＯＨ）２悬浊液和ＣＯ２气体在超重力反应器（旋转填充床反应器）中进行碳化反应制备纳米立方形ＣａＣＯ３为研究对象，中试实验研究了超重力加速度ｇｒ、液体循环量Ｌ、气体流量Ｇ、Ｃａ（ＯＨ）２初始浓度等操作条件对产物粒度及其分布、碳化反应时间的影响。结果表明，利用超重力反应结晶法可以制备出平均粒度为１５－４０ｎｍ、分布较窄的立方形ＣａＣＯ３；碳化反应时间是传统方法的１／４－１／１０。
The synthesis of nano-sized cubic CaCo3 by the high-gravity reactive precipitation in arotating packed bed reactor(RPBR) was studied at pilot scale. The effects of high gravity acceleration,liquid flow volumetric rate, gas flow volumetric rate and initial concentration of Ca(OH)2 on the meanparticle size, variance of size distribution of CaCO3 particle and the carbonation reaction time were inves-tigated. The results showed that the produced CaCO3 particles have the mean size of 15- 40 nm andvery narrow size distribution, and the carbonation reaction time is 4- 10 folds shorter than that of usingconventional carbonation method.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1999年第2期179-182,共4页
Acta Metallurgica Sinica
基金
国家863计划!715-009-0080
国家自然科学基金!29606001
关键词
碳化反应
超重力反应器
纳米颗粒
碳酸钙
high-gravity reactive precipitation, nanometer cubic calcium carbonate, carbonationreaction
