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Effect of operating factors on the efficiency of ultrafine grinding


November 09, 2018 07:40AM
The operational factors undoubtedly affect the efficiency of the grinding milling machine technology. For example, in closed-circuit grinding, when the ratio of returning sand is too large and exceeds the normal passing ability of the grinding machine, the phenomenon of ?running rough? will appear in the grinding products. If the sand return ratio is too small or there is no sand return, it will easily cause over-grinding. If the load is too large, the phenomenon of ?running rough? in the grinding products is serious, and if the load is insufficient, the crushing is severe. Therefore, it is required to give uniformity and stability to the ore during sanding. When the ore amount is given, the efficiency of the grinding technology will be improved. The grinding grain size of each section is determined to be unreasonable. It also affects the efficiency of grinding technology.
Grinding concentration has a great influence on the efficiency of grinding technology. Because the grinding concentration of grinding equipment such as centrifugal ultra-fine grinding machine directly affects the grinding time, the concentration is too large, the material flows slowly in the limestone milling, the grinding time increases, and it is easy to over-crush. In addition, in the high concentration of the slurry, the coarse particles are not easy to sink, and it is easy to flow away with the slurry, resulting in "running rough". If the concentration of the slurry is too thin, the material flow rate will increase. When the grinding time is shortened, "running coarse" will also occur, and at the same time, large-density ore particles are easily deposited on the bottom layer of the slurry, which may cause over-grinding. Therefore, proper grinding concentration should be mastered during operation, which requires strict control of water consumption. Generally, the coarse grinding concentration is usually from 75% to 85%, and the fine grinding concentration is generally from 65% to 75%.

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