云南西双版纳埃洛石的分散研究

Dispersion of Yunnan Xishuangbanna Halloysite

以云南西双版纳的埃洛石为研究对象,通过测定矿浆的粘度,确定了无分散剂条件下搅拌强度、矿浆固含量、pH值等对分散的影响;研究了添加聚丙烯酸钠、六偏磷酸钠、焦磷酸钠三种分散剂对分散的影响。结果表明:三种分散剂对埃洛石都有较好的分散作用,分散剂的降粘能力的大小为:聚丙烯酸钠>六偏磷酸钠>焦磷酸钠。三种分散剂的适宜的pH值为:聚丙烯酸钠pH值大于7,六偏磷酸钠pH值大于6.2,焦磷酸钠pH值大于8.2。

The halloysite from Xishuangbanna in Yunnan Province was studied in this paper. By measuring the slurry viscosity, the impact of stirring intens, solid content and pH value on the dispersion of halloysite in water without dispersant was determined. Moreover, the influences on the dispersion of halloysite in water with three various dispersants were discussed. The result showed that all of the three kinds of dispersants had good dispersing ability to halloysite. The capability of dispersants to the viscosity decreases successively： sodium polyacrylate, sodium hexametaphosphate, Sodium pyrophosphate. The appropriate pH value of sodium polyacrylate was greater than 7, sodium hexametaphosphate greater than 6.2, and Sodium pyrophosphate greater than 8.2.