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| An effective way to improve semi-autogenous grinding capacity of a molybdenum ore |
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Received:June 21, 2021
Revised:July 28, 2021
Accepted:August 18, 2021
Published Online:April 27, 2022
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| DOI： |
| KeyWord:Semi-autogenous grinding, processing capacity, steel ball diameter, steel ball filling rate, theoretical formula |
| Author | Institution |
| WANG Yue |
China National Gold Group Inner Mongolia Mining Co,Ltd |
| SU Xiangyu |
Beijing HMR Technology Co.,LTD. |
| DENG Haixuan |
Beijing HMR Technology Co.,LTD. |
| ZHANG Xupu |
China National Gold Group Inner Mongolia Mining Co,Ltd |
| MIAO Yu |
China National Gold Group Inner Mongolia Mining Co,Ltd |
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| Abstract: |
| Due to the increasing ore hardness with deepening of mining depth in a large molybdenum ore, the efficiency of semi-autogenous grinding (SAG) mill is reduced from the designed 833.3t/h to 750.8t/h, with a drop of nearly 10%, which seriously affects the processing capacity. By diagnostic analysis of grinding system, the processing capacity of the SAG mill could be quickly and effectively improved by the following methods: adjusting the parameters such as the aperture size of pebble ports of the SAG mill, the arrangement of the grate, the HP400 discharge port; increasing the discharge amount of pebbles of the SAG mill; achieving the continuous and stable feeding of the HP400 pebble crusher to give full play to the potential advantages of HP400; adopting the method of increasing the steel ball filling rate of the SAG mill and the diameter of the supplementary ball. Based on the results obtained by Professor Duan Qifu in years of research and combined with the production practice of large-scale mines at home and abroad, the latest theoretical formula for improving efficiency of the SAG mill is proposed. |
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