King Abdulaziz University, Jeddah, Kingdom of Saudi Arabia:

Hussin A. M. Ahmed, Professor, Dr. Eng., hussien135@gmail.com (corresponding author)

Cairo University, Giza, Arab Republic of Egypt:

Ayman A. El-Midany, Professor, PhD, aelmidany@gmail.com

The Bond work index (Wi) is an indicative parameter for ores grindability. It is used for mill design and estimation of grinding energy. It is affected by different parameters, some of which are related to the ore, such as heterogeneity, mineralogy, and grain size, while others are related to the grinding mechanism. In this study, the Bond Ball Mill Work Index of different phosphate ores was investigated as a function of the ore chemical composition. The results obtained showed that the Bond Ball Mill Work Index can be empirically expressed as a function of the ore chemical composition. This finding may serve as a rapid alternative for initial assessment of Wi for phosphate ores of known chemical compositions.

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