CORRELATION BETWEEN BOND WORK INDEX AND MECHANICAL PROPERTIES OF SOME SAUDI ORES | ||
| JES. Journal of Engineering Sciences | ||
| Article 16, Volume 40, No 1, January and February 2012, Pages 271-280 PDF (224.11 K) | ||
| Document Type: Research Paper | ||
| DOI: 10.21608/jesaun.2012.112727 | ||
| Author | ||
| Gamal S. Abdel Haffez | ||
| KAU, Jeddah, KSA; Lecturer, Mining Engineering Dept. –Faculty of Engineering- Assiut University, Egypt | ||
| Abstract | ||
| The crushing energy in mineral processing industry is usually determined by empirical Bond index, regardless of the mechanical properties of a rock. Although several attempts have been made to obtain the comminution energy based on theoretical approaches, it would be beneficial to examine this relation based on physical concept. In this paper, some Saudi samples of bauxite, kaolinite, granodiorite, magnetite, granite, feldspar and quartz were tested for hardness, abrasion, compressive strength and modulus of elasticity and the bond work index of these samples were estimated. The value of Bond work index of the above samples has shown a variation from 10.8 kwh ton-1 for bauxite (high abrasion value and low compressive strength) to 20.4 kwh ton-1 for granite (low abrasion value and high modulus of elasticity). The correlation between the abrasion value(X2) and work index (Wi) is found to be Wi = -1.8 Ln (X2) + 11.5 with correlation coefficient of 0.80. | ||
| Keywords | ||
| Bond work index; Mechanical properties of rocks; Grinding energy- Crushing resistance | ||
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