Evaluation of gold ore properties and their impact on grinding operations

Mohamed M.A. Hassan¹, Mahrous A.M. Ali¹, Mohamed G. Farghaly¹, Wael R. Abdellah², Jung Gyu Kim³

¹Al-Azhar University, Qena, Egypt

²University of Assiut, Qena, Egypt

³Chonnam National University, Gwangju, Korea

Min. miner. depos. 2022, 16(4):34-39

https://doi.org/10.33271/mining16.04.034

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      ABSTRACT

      Purpose. The purpose of this paper is to evaluate the efficiency of grinding operations in terms of how mechanical properties (e.g., strength properties and ore texture) affect the Bond Work Index.

      Methods. The specimens have been collected in the Eastern Desert of Egypt, namely Abu Marwat, Hamash and Al Sadd. As a result, strength parameters such as compressive strength, cohesiveness and hardness have been assessed. Ore texture, mineral content and bonds between tiny fabric units have been examined using X-Ray Diffraction (XRD) and thin section.

      Findings. This research shows that as the strength properties of the rock increase, the Bond Working Index also increases. Moreover, the results indicate that the level of cohesion of ore minerals with the surrounding tailings, on the one hand, and the variance in the tailing content, on the other hand, play a significant role in the processing operation, given the discrepancy in the Bond Work Index for the six Abu Marawat gold ores of 18.8%.

      Originality. This research attempts to develop a methodology for assessing the efficiency of grinding operations as a function of rock strength properties and ore texture in relation to the Bond Work Index.

      Practical implications. Ore texture is one of the most important factors influencing the grinding process. Since grinding consumes a considerable amount of energy, the economic evaluation is based on increasing the grinding efficiency. According to previous research, the petrographic, which varies from sample to another, has an impact on the mechanical properties as well as the grinding operations.

      Keywords: grinding operation, ore texture, Bond Work Index, XRD, thin section

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