Abstract
The grinding process in industrial ball mills is the basic unit and most energy-consuming component. Therefore, great economic gains will be achieved if a slight improvement occurs in the efficiency of grinding. The variation of gold ore petrography affects its mechanical properties which in turn, affects the grinding process. In this investigation, different gold-bearing ore types from the Mahd Ad Dahab gold mine were tested. As a part of the current study, some of the me- chanical and physical properties including strength properties, geological characterization and Bond work index were determined. This investigation showed that the Bond work index increases with an increase in rock strength properties. The maximum difference in the Bond work index for the five tested gold ores was 11%. Whereas, an average interval between the two-sequence types of the tested ore was approximately 2.5%.
Highlights
Grinding is the last step in comminution
This study aims to examine the effect of some mechanical properties of well ore texture on the amount of energy consumed during grinding in terms of the Bond work index
In the Mahd Ad Dahab gold mine, the subsurface field works in the different mine levels revealed the presence of different textures
Summary
Grinding is the last step in comminution Such a step is necessary to attain the required size, either in a dry or wet medium, to liberate the locked valuable minerals from the host rock, and to expose more surface area for contact. Several researchers have shown that the particle size, surface area and ore texture are important parameters in controlling rock failure. They are used to understand the behavior of different rocks that have same matrix (Howarth and Rowlands, 1986 &1987; Ersoy and Waller, 1995; Azzoni, 1996; Ozturk and Nasuf, 2002).
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