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