摘要：通过控制单因素实验条件, 油酸钠作为改性剂, 对重晶石进行疏水调控, 探究其改性后的效果与改性剂用量、改性温度、改性时间以及BaSO₄质量分数之间的关系。结果表明:重晶石改性的优化条件是:油酸钠的质量分数为1.0%、改性时间为15 min、改性温度为80℃, BaSO₄的质量分数为30%;获得改性后的重晶石润湿接触角度为128°, 使重晶石表面从亲水性转化为疏水性。

关键词：重晶石；油酸钠；表面改性；疏水调控

Abstract：By controlling single experimental conditions, barite was prepared through hydrophobic agglomeration with sodium oleate. The relationships among the after-modified barite and the amount of sodium oleate, modification temperature, modification time, slurry concentration were expounded. The results show that the optimal modification conditions are as follow:the amount of sodium oleate 1.0%, modification time 15 min, modified temperature 80 ℃, the concentration of slurry 30%. The wetting contact angle of after-modified barite is 128 °, the surface of barite is changed into hydrophobic.

Keywords: barite；sodium oleate；surface modification；hydrophobic agglomeration