高活性重晶石粉体制备研究

Research on the Preparation of High Activity of Barite Powder

采用行星磨对重晶石粗精矿进行超细磨矿,研究了磨矿方式、磨矿时间、矿浆质量分数等因素对重晶石粉体性能的影响。结果表明,在矿浆质量分数为55%、磨矿时间为2 h、磨矿桶体转速为825 r/min的条件下,可得到平均粒径小于5μm、比表面积为4000~10000 cm2/g、白度为69.26%的超微细重晶石粉体。重晶石粉体经进一步精制后,重晶石纯度提高,白度达到92.0%,BaSO4含量达到97.20%,主要致色物Fe3＋全部去除,其它致色物明显降低,产品为高活性高白度重晶石粉体材料。

The rough concentrate of barite was grinded with planetary ball mill. The factors that .grinding method, grinding time and pulp density of influencing barite powder were investigated. The results showed that 55% of pulp concentration density, 2 h of grinding time, and 825 r/min of grinding barrel speed, we can obtain the micronization of barite powder that is the average particle size 〈 5 um, 4000-10000 cm2/g of the specific surface area and 69.26% of whiteness. After refining barite powder, the purity quotient were increased such as 92% for whiteness, BaSO4 97.2%, Fe3＋ as the color-causing element was removed, also the other impurity substances were obviously decreased. The high activity and whiteness of barite powder materials have been manufactured.