造纸用超细重质碳酸钙研磨技术进展

Present Development of Grinding Technology of Ultrafine Ground Calcium Carbonate in Paper Industry

在前人研究的基础上,归纳总结了超细重质碳酸钙的基本物性和表面特征,介绍了造纸业对高品质重钙的技术指标,探讨了用于造纸的超细重钙湿法研磨较为先进的工艺,包括原料选用和预处理、湿法研磨的目的、条件、方法、工艺以及研磨过程中的影响因素。指出了重质碳酸钙在造纸工业中的应用现状和发展趋势。认为经过预处理的重钙矿粉原料有利于获得颗粒分布窄的、更适合造纸用的颜填料,且在磨机设备选型上,以成熟的立式磨机为主,并以大容积、小研磨介质、高效分离系统、高性能耐磨材质和全自动控制为特征。

On the basis of other people's researches, the basic physical and surface characters of ultrafine ground calcium carbonate are summarized. The technical parameters of ground calcium carbonate for paper industry are also given. An advanced process is introduced, including the pretreatment of the selected minerals, the special purpose, conditions and process in this wet grinding method. The present situation, application, and also the future directions of development of ground calcium carbonate, in paper industry, are indicated. In this process, a pretreatment of ground calcium carbonate mineral origin is taken into account to obtain a slurry with close grain size distribution, which is more suitable for paper making. And a mature vertical mill system with large chamber volume, small grinding media, highly effective separating system, well-resistant materials and an automatic control panel, is recommended.