建平膨润土锂化研究

Lithium Modification of Bentonite in Jianping

对提纯后的建平天然膨润土进行锂化改型。探索了Li2CO3与H2C2O4的比值、反应时间、pH值、反应温度、矿浆浓度对锂化效果的影响。用锂化土的膨胀容、胶质价和X射线衍射图谱对锂化效果进行检验。结果表明,最佳的锂化工艺为:溶液体系pH值在7～8,m(Li2CO3):m(H2C2O4)=0.8,反应时间为1.5 h,反应温度为80℃,矿浆浓度为3%。制备的锂基膨润土的悬浮性有了很大的提高。

The purified bentonite in Jianping was modified. The influence of the ratio of Li2CO3 and H2C204, reaction time, pH value, reaction temperature, bentonite concentration on the modification was studied. The swelling rate and X-ray diffraction pattern of the bentonite were tested. The results show that the best conditions for lithium modification is the value ofpH between 7 and 8, the ratio of Li2CO3 and H2C204 is 0.8, the reaction time is 1.5 h, the reaction temperature is 80 ℃ and the bentonite concentration is 10%. The suspension property of the lithium bentonite has been greatly improved.