助磨剂对重质碳酸钙超细粉碎效果及能耗的影响

摘要

Energy consumption is a problem in ultraifne grinding process. This paper studies the impact of energy consumption onD50 and size modulus of product by wet ultraifne grinding GCC in a horizontal MiniZeta stirred media mill with different grinding aids. Three energy consumption models are established based on MATLAB software and Rosin-Rammler distribution model, and veriifed under grinding conditions with no grinding aids, sodium hexametaphosphate and Acume 9300. The results show that the value ofD50 and size modulus ifrst reduced and then stabled at certain values with the increase of energy consumption. Adding grinding aids is conducive to obtain the finer product with low energy consumption. Acume 9300 is superior to sodium hexametaphosphate for its outstanding performances in grinding and energy saving. The models established are W=0.9115a-1.4479,W=0.4532a-1.1482,W=0.6081a-1.4811 for three grinding conditions. The models are reliable after veriifed by experiment.%能耗是超细粉碎过程中备受关注的问题。本实验采用MiniZeta型卧式搅拌磨对重质碳酸钙进行了湿法超细粉碎实验，采用MATLAB数学分析软件，基于罗辛-拉姆勒粒度特性方程研究了不同助磨剂条件下能耗与产品D50和粒度模数的关系，建立了不添加助磨剂、添加Acume 9300和添加六偏磷酸钠3种实验条件下的能耗模型并对其进行了验证。结果表明，D50和粒度模数随能耗的增加呈现出先减小后平缓的趋势。添加助磨剂有利于在低能耗条件下得到D50较小的产品。助磨剂Acume 9300的助磨效果及节能效果优于六偏磷酸钠。3种实验条件下的能耗模型分别为W=0.9115a-1.4479，W=0.4532a-1.1482，W=0.6081a-1.4811，经实验验证所得模型可靠。