山西膨润土提纯、钠化研究及表征

Shanxi Bentonite Purification and Characterization of Sodium Modified Research

选用山西钙基膨润土为原料,通过浸泡湿筛分级提纯,蒙脱石含量由40.8%增加到78.7%。在提纯土的基础上湿法钠化,通过化学分析、物化性能测试、XRD、差热分析和TEM等手段表征,当纯碱最佳用量为5%时,钠化后胶质价达到2195 mL/15 g、膨胀容达到96.5 mL/g,d(001)层间距从1.5546 nm变为1.2799 nm,钠化土的质量超过铸造土一级土要求。

Choose Shanxi calcium base bentonite as raw material,through the soaking wet sieve grading purification,content of montmorillonite by 40.8% increased to 78.7%.On the basis of soil purifying wet-process sodium optimization,through chemical analysis,physical and chemical properties testing,XRD,DSC and TEM means characterization.When using lime-soda optimum dosage was 5%,sodium a.v.glial price reached 2195 mL/15 g,expansion let reached 96.5 mL/g,d（001） lamellar spacing from 1.5546 nm into 1.2799 nm,sodium change of soil quality more than casting soil level soil requirements.