超细粉碎过程助磨剂的作用机理

来源期刊：中南大学学报(自然科学版)2000年第5期

论文作者：杨华明 邱冠周

文章页码：400 - 402

关键词：超细粉碎;搅拌磨;助磨剂;作用机理

Key words：ultrafine grinding; stirred mill; grinding aid; affecting mechanism

摘    要：通过粉体ζ-电位、矿浆粘度测定及光电子能谱(XPS)和分散率分析,研究了搅拌磨超细粉碎滑石粉过程中助磨剂的助磨行为.分析了六偏磷酸钠与滑石粉的表面作用及吸附特性,提出了助磨剂在超细粉碎过程中的吸附模型.此外,探讨了助磨剂对超细粉碎行为的影响.研究结果表明,助磨剂通过与滑石粉的吸附作用,降低了矿浆粘度,从而提高了超细粉碎的效率.

Abstract: The aiding behavior of hexametaphosphate(hexa) during ultrafine grinding of talc with stirred mill is studied through analysis ofζ-potential,pulp viscosity,XPS and scattering rate in the paper. The surfacial effect and adsorption characteristics ofHexa on talc particles are analysed. A typical model of grinding aid during ultrafine grinding is given. Effect of Hexa on ultrafine grinding behavior is also discussed. The results show that it is the adsorption of Hexa and reducing pulp viscosity that improve the grinding efficiency.