The effects of ball filling and ball diameter on breakage kinetics of barite mineral

Abstract

Barite is an industrial material that is used in many applications such as a filler in paint, paper and plastic, etc. In these industries, ultrafine grinding of barite mineral is generally needed. The absolute fineness of the ball diameter and the ball charge grading are important factors for the optimal operation of a ball mill. Therefore, the effects on breakage kinetics of the ball diameter and the fractional ball filling were investigated on the barite at batch grinding conditions based on a kinetic model. For this purpose, firstly, nine different mono-size fractions were carried out between 2.8 mm and 0.106 mm formed by a ?2 sieve series. Then, Si and Bi,j equations were determined from the size distributions at different grinding times, and the model parameters were compared for three different ball filling (25%, 35% and 45%) and three different ball diameter (15 mm, 25.4 mm and 40 mm). Finally, model parameters were discussion for every test. The result of tests, the effect of ball filling and ball diameter on the grinding was found more different in terms of some results than other investigators.