棕刚玉渣的硬脂酸湿法改性

以棕刚玉渣、硬脂酸为原料,在乙醇体系中进行机械力化学改性研究。分别研究了球磨过程中球料比、球磨时间、转速、硬脂酸用量、浆料浓度等参数对实验样品亲油化度、活化指数的影响。在最佳工艺基础上进行了正交实验,实验结果表明,适宜条件为硬脂酸用量3.5%,球料比4∶1,球磨时间30 min,球磨转速450 r/min,浆料浓度25%时,实验样品的亲油化度和活化指数分别达到46.8%和100%,且完全疏水。

Wet modification of brown corundum slag by stearic acid

The brown corundum slag was modified,using stearic acid,by mechanochemical modification in the ethanol media.The effects of the weight ratio of ball to powder,rotational time,rotational speed,dosage of stearic acid and slurry concentration on the lipophilic degree and activation index of the product were studied.According to the results,the proper conditions for the modification of the products are displayed as follows:the mass ratio of ball and powder of 4,the rotational speed of 450 r/min,the milling time of 30 min,the dosage of the stearic acid of 3.5% of the mass of brown corundum slag,slurry concentration of 25%.Under the conditions,the lipophilic degree of the product attained 46.78% and the activation index of brown corundum slag attained 100% after the modification.And it becomes completely hydrophobic under the optimum modification conditions.