A Study on the Corrosive and Abrasive Wear of Grinding Media in Grinding of Minerals Using Fuzzy Analytical Hierarchy Delphi Method

Abstract

The purpose of this study was to evaluate and rank the key factors affecting abrasive and corrosive wear of grinding media using fuzzy Delphi analytic hierarchy (FDAHP) method in grinding of copper sulphide minerals. There are many factors that affect the abrasive and corrosive wear of grinding media. Weight of each impact factor must be determined by using comprehensive scenario that is involved all the predicable grinding media wear issues. FDAHP applied to determine the importance degree of each factor. Significance of 27 effective main parameters is evaluated. The results indicate that composition and metallurgical properties of the grinding media, ore mineralogy, pulp viscosity, rheological properties and water chemistry throughout of grinding circuit and speed of the mill have the greatest weight in the abrasive wear. Moreover, composition and metallurgical properties of the grinding media, galvanic interaction between grinding media and mineral, ore mineralogy, water chemistry, pH, Eh and solid content had the highest degree of importance in corrosive wear, respectively. Furthermore, gas purging, Eh and discharge type of mill were the least significant factors in abrasive wear. Additionally, discharge type, diameter and speed of the mill were the least important factors in corrosive wear.