MODELING AND OPTIMIZING THE CORROSIVE WEAR OF STEEL BALLS IN BALL GRINDING MILL

This paper was aimed to address the modeling and optimization of factors affecting the corrosive wear of lowalloy and high carbon chromium steel balls. response surface methodology, central composite design (ccd) wasemployed to assess the main and interactive effects of the parameters and also to model and minimize the corrosivewear of the steels. the second-order polynomial regression model was proposed for relationship between the corrosionrates and relevant investigated parameters. model fitted to results indicated that the linear effects of all of factors,interactive effect of ph and grinding time and the quadratic effects of ph and balls charge weight, were statisticallysignificant in corrosive wear of low alloy steel balls. the significant parameters in the corrosive wear of high carbonchromium steel balls were the linear effects of all factors, the interactions effect of solid concentration, mill speed, millthroughout, grinding time, and the quadratic effects of ph and solid content. also, the results showed that within therange of parameters studied, the corrosion rate of 78.38 and 40.76 could be obtained for low alloy and high carbonchromium steel balls, respectively