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对于高长径比的凹凸棒石黏土,低成本晶束解离是凹土技术产业化的要求.将冻融和挤压工艺相结合,对3种典型的凹土矿进行了凹土增黏和提纯的相关研究.结果表明,冻融-挤压处理可低成本实现凹土晶束解离,低温速冻(-20～-30℃)有利于提高晶束解离效果,冻融-挤压处理对硬质高黏凹土的晶束解离效果是单纯挤压的2.2倍,冻融-挤压处理协同分散剂六偏磷酸钠提纯白云石凹土,纯度高达95%,收率为常规提纯方法1.7倍.
For the attapulgite clay with high aspect ratio, the low-cost beam detachment is the industrialization requirement of the attapulgite technology.Through the combination of freeze-thaw and extrusion process, The results show that the freeze-thaw-extrusion process can achieve the dissociation of the concave-grained crystal beam with low cost, and the low-temperature freezing (-20 ~ -30 ℃) can improve the dissociation effect of the crystal beam, freeze-thaw- Treatment of hard high-density clay beam dissociation effect is a simple squeeze 2.2 times, freeze-thaw - extrusion co-Dispersant Sodium hexametaphosphate dolomite purification of soil, purity up to 95%, the yield of conventional 1.7 times the purification method.