湖北钟祥累托石粘土的提纯工艺

THE BENEFICIATION OF RECTORITE FROM ZHONGXIANG HUBEI

钟祥累托石粘土是一种吸水膨胀倍数高、矿浆粘度大的粘土，其主要杂质黄铁矿和水云母粒度细，在矿浆中受颗粒间的摩擦力和粘滞阻力的影响，常呈稳定悬浮状态。为此采用了不同的矿浆浓度和不同的分散剂进行重选试验。结果表明，在较低的矿浆浓度和添加适量有效的分散剂的条件下，黄铁矿等杂质能迅速沉降．通过重选可获得纯度90％以上的累托石粘土。

The rectorite from Zhongxiang is one of the clay which possesses good property of hydration and expansibility. It swells to form a colloidal gel after water adsorption. The associated minerals-pyrite,hydromica,etc. -are small in grain size,and may be suspended in high pulp density for its high viscosity,they can be lowered by reducing the pulp density and putting a dispersing agent into it. In low pulp density and good dispersing state,the gravity concentration is adopted to seperate the associated minerals from the rectorite,for there exists a great difference in specific gravity and in grain size between them. After concentration,we can get a high pure rectorite clay.