Investigate the relationship between of the bond work index and the physical and mechanical properties of rocks (case study: the feed of Uremia cement plant)

The bond work index is the most important parameter that determines the amount of energy consumed and examines the efficiency of the grinding circuit. In this research, the bond work index of mineral feed of Uremia cement plant was determined using by standard bands method. The bonding index for iron ore, low grade and high grade limestone and pozzolan were calculated to be 14.75, 11.61, 11.87 and 10.80 Kwh/t, respectively. In order to investigate the relationship between the bond index and the physical and mechanical properties of rocks, experiments were conducted to determine the physical and mechanical properties of rocks. The bonding index with the porosity of the samples, there is an inverse relationship (R2=0.7253), but increased with logarithmic relationships by increasing the density. Also, the bond index increases with increasing mechanical properties of rock such as compressive strength, tensile strength and elastic coefficient as logarithmic function with good correlation (R2=0.80). According to the results, the bond work index has a very high correlation (about 0.93) with tensile strength and one-axial compressive strength compared to other rock properties. By Using the results and formulas, we can estimate the bond work index of mineral feeds of Uremia cement plant using physical and mechanical properties.