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
Full text (PDF)
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
- Poirier, J.-P. (1979). Experimental rock deformation. The brittle field, by MS Paterson. Bulletin de Minéralogie, 102(2), 301-301. https://doi.org/10.3406/bulmi.1979.7256
- Kwaśniewski, M. (2013). Comments on the ISRM suggested method “A failure criterion for rocks based on true triaxial testing”. Rock Mechanics and Rock Engineering, 46(4), 917-919. https://doi.org/10.1007/s00603-013-0407-6
- Abdelhaffez, G. (2020). Studying the effect of ore texture on the Bond Work Index at the Mahd Ad Dahab Gold Mine: A case study. Rudarsko-Geološko-Naftni Zbornik, 35(1), 111-121. https://doi.org/10.17794/rgn.2020.1.9
- Haffez, G.S.A. (2012). Correlation between work index and mechanical properties of some Saudi ores. Materials Testing, 54(2), 108-112. https://doi.org/10.3139/120.110302
- Ersoy, A., & Waller, M.D. (1995). Textural characterization of rocks. Engineering Geology, 39(3-4), 123-136. https://doi.org/10.1016/0013-7952(95)00005-Z
- Kekec, B., Unal, M., & Sensogut, C. (2006). Effect of the textural properties of rocks on their crushing and grinding features. Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material, 13(5), 385-392. https://doi.org/10.1016/S1005-8850(06)60079-0
- Badr, S., & Abdelhaffez, G. (2012). Numerical modeling of macro-scale brittle rock crushing during impacts. Journal of Engineering Sciences, 40(6), 1781-1792. https://doi.org/10.21608/jesaun.2012.114619
- Yuce, A.E. (2017). Grinding size estimation and beneficiation studies based on simple properties of ore components. Physicochemical Problems of Mineral Processing, 53(1), 541-552. https://doi.org/10.5277/ppmp170142
- Korman, T., Bedekovic, G., Kujundzic, T., & Kuhinek, D. (2015). Impact of physical and mechanical properties of rocks on energy consumption of jaw crusher. Physicochemical Problems of Mineral Processing, 51(2), 461-475. https://doi.org/10.5277/ppmp150208
- Park, B., & Min, K.B. (2015). Bonded-particle discrete element modeling of mechanical behavior of transversely isotropic rock. International Journal of Rock Mechanics and a Sciences, (76), 243-255. https://doi.org/10.1016/j.ijrmms.2015.03.014
- Ipek, H.A.L.İ.L., Ucbas, Y.A.Ş.A.R., & Hosten, C. (2005). Ternary-mixture grinding of ceramic raw materials. Minerals Engineering, 18(1), 45-49. https://doi.org/10.1016/j.mineng.2004.05.0063
- Petrakis, E., Stamboliadis, E., & Komnitsas, K. (2017). Evaluation of the relationship between energy input and particle size distribution in comminution with the use of piecewise regression analysis. Particulate Science and Technology, 35(4), 479-489. https://doi.org/10.1080/02726351.2016.1168894
- Vyhmeister, E., Reyes-Bozo, L., Rodriguez-Maecker, R., Fúnez-Guerra, C., Cepeda-Vaca, F., & Valdés-González, H. (2019). Modeling and energy-based model predictive control of high pressure grinding roll. Minerals Engineering, (134), 7-15. https://doi.org/10.1016/j.mineng.2019.01.016
- Atmaca, A., & Kanoglu, M. (2012). Reducing energy consumption of a raw mill in cement industry. Energy, 42(1), 261-269. https://doi.org/10.1016/j.energy.2012.03.060
- Liang, W.G., Yang, C.H., Zhao, Y.S., Dusseault, M.B., & Liu, J. (2007). Experimental investigation of mechanical properties of bedded salt rock. International Journal of Rock Mechanics and Mining Sciences, 44(3), 400-411. https://doi.org/10.1016/j.ijrmms.2006.09.007
- Ocak, I. (2008). Estimating the modulus of elasticity of the rock material from compressive strength and unit weight. Journal of the Southern African Institute of Mining and Metallurgy, 108(10), 621-626.
- Helmy, H.M., Kaindl, R., Fritz, H., & Loizenbauer, J. (2004). The Sukari Gold Mine, Eastern Desert-Egypt: Structural setting, mineralogy and fluid inclusion study. Mineralium Deposita, 39(4), 495-511. https://doi.org/10.1007/s00126-004-0426-z
- Klemm, R., & Klemm, D. (2012). Gold and gold mining in ancient Egypt and Nubia: Geoarchaeology of the ancient gold mining sites in the Egyptian and Sudanese eastern deserts. Heidelberg, Germany: Springer Berlin, 649 p. https://doi.org/10.1007/978-3-642-22508-6
- Valliant, W.W., & Salmon, B. (2012). Technical report on the Abu Marawat concession, Egypt. NI43-101 Report for Alexander Nubia International Inc. by Roscoe Postle Associates Inc. SEDAR published report.
- Gabr, S., Ghulam, A., & Kusky, T. (2010). Detecting areas of high-potential gold mineralization using ASTER data. Ore Geology Re-views, 38(1-2), 59-69. https://doi.org/10.1016/j.oregeorev.2010.05.007
- Botros, N.S. (2004). A new classification of the gold deposits of Egypt. Ore Geology Reviews, 25(1-2), 1-37. https://doi.org/10.1016/j.oregeorev.2003.07.002
- Botros, N.S. (2015). Gold in Egypt: Does the future get worse or better? Ore Geology Reviews, (67), 189-207. https://doi.org/10.1016/j.oregeorev.2014.11.018
- Bampton, M. (2017). Hamama West Deposit, Abu Marawat concession, Arab Republic of Egypt. NI 43-101 Independent Technical Report. Perth, Western Australia: Cube Consulting Pty. Ltd., 121 p.
- Işman, A. (2013). Proceedings Book of the International Science and Technology Conference. St. Petersburg, Russian Federation: ISTEC, 1041 p.
- Zoheir, B.A., & Akawy, A. (2010). Genesis of the Abu Marawat gold deposit, Central Eastern Desert of Egypt. Journal of African Earth Sciences, 57(4), 306-320. https://doi.org/10.1016/j.jafrearsci.2009.10.002
- Ahmed, A.H. (2022). Mineral deposits and occurrences in the Arabian-Nubian shield. Jeddah, Saudi Arabia: Springer Nature.https://doi.org/10.1007/978-3-030-96443-6