Wet-purification of a Sodium-based Bentonite
作者单位：School of Chemical and Environmental Engineering China University of Mining and Technology
会议名称：《中国材料大会2012》
会议日期：2012年
学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术]
基 金：sponsored by the Fundamental Research Funds for the Central Universities(No.2010YH10) national innovation experiment program for university students(110305g)
关 键 词：Bentonite Wet-purification Centrifugal classifying Dispersing agent.
摘 要：Bentonite mainly consists of montmorillonite, but is always associated with other impure minerals. In order to increase the montmorillonite content in raw bentonite from Xinjiang, this paper adopts wet-purification process which integrates the scrubbing process with streamlined centrifugalization. The optimum experiment condition is solid - liquid ratio （w ∶ v） 1 ∶ 30, macerating time 20h, scrubbing time 10min, centrifugation time 13min, centrifugation velocity 1260r/min, ZHL dosage 0.4% and ZHC dosage 0.4%. According to the amount of methylene blue absorption raising from 64.5mmol/100g to 110mmol/100g and X-ray diffraction analysis, the montmorillonite content raises from 48% to 82%.