瓜尔豆胶对凹凸棒石黏土胶体黏度的影响

Influences of Adding Guar Gum on Viscosity of Attapulgite Colloid

向粉碎至150μm的凹凸棒石黏土中添加不同比例的瓜尔豆胶,然后用不同的制浆方法制备盐饱和胶体,并分别测试胶体的黏度和筛余量。结果表明:剪切能力强的搅拌机有助于凹凸棒石黏土分散成胶,提高胶体黏度降低筛余量;瓜尔豆胶能增加凹凸棒石胶体的黏度,但添加过量后会导致胶体絮凝从而降低胶体黏度;用筛余量表征添加了瓜尔胶的凹凸棒石黏土胶体的絮凝情况有一定局限性。

In order to make colloid with saturated salt water of higher viscosity, adding various amounts of guar gum into attapulgite clay with sizes less than150μm and several methods of colloid preparation were optimized in this study. The measured colloidal viscosity and its sieve remains indicate that addition of guar gum can clearly increase the viscosity of clay colloid, but excessive addition leads to viscosity decreasing and sieve remains increasing due to colloidal lfocculation. Stronger stir-force mixer can be used to improve the viscosity of attapulgite colloid and reduce colloidal sieve remains. It is also found that the parameter of sieve remains has limitation to represent viscosity and lfocculation of attapulgite colloid.