This method is based on interm ittent carbonization method for preparation of nanometer calcium carbonate. It adopts piezoelectric ultrasonic assisted synthesis method, aims to realize industrialized production of high quality nanometer calcium carbonate, settles synthetic reaction tank structure and the design of synthetic gear system of nanometer calcium carbonate under ultrasound irradiation, and discusses the relationship between the influence factors and nano calcium carbonate particle size under ultrasonic irradiation process. The graph indicates the relationship between the heat transfer of reaction system , mass transfer effect and the particle size. The results show that the main factors affecting the particle size are initial tem perature of slurry, Ca (OH )2 slurry em ulsion concentration, and flow rate of CO2. In a homemade device, the high quality nano calcium carbonate products of 10 ~ 30 nm are produced, and this provides another method for the production of nanometer calcium carbonate powder.%以间歇碳化法制备纳米碳酸钙的工艺为基础，以压电超声波辅助合成为方法，以实现工业化生产优质的纳米碳酸钙为目的，确定了超声辐照下纳米碳酸钙的合成反应罐结构及合成装置系统的设计，并探讨了超声波辐照下工艺过程各影响因素与纳米碳酸钙粒径的关系。图示了反应体系的传热、传质效果及与粒径的关系。结果表明，影响压电超声在碳化法合成纳米碳酸钙的粒径主要因素有料浆初始温度、C a(O H )2乳液浓度、C O 2的流量。在自制的装置中，制备出10～30nm 优质的纳米碳酸钙产品，为纳米碳酸钙粉料的生产提供了另种方法。
展开▼
