混炼挤压改性对膨润土分散影响的试验研究

Experimental Study on Effect of Mixing Machine Extrusion Modification to Bentonite Distribution

通过对天然钙基膨润土钠化改性过程以及有机改性过程中混炼挤压的实验,分析了混炼挤压对膨润土分散的影响。实验结果表明,混炼挤压作用可以有效地提高钙基膨润土的钠化度以及膨润土颗粒的分散度和ξ电位。

In the processes of modification from natural calcium bentonite into sodium bentonite, or from sodium bentonite into organic bentonite, mixing and extrusion has an important function in improving distribution of bentonite. By shearing action and broken bond, the average diameter of bentonite particle size is availably reduced, and the average quantity of its ξ-potential is increased.