Improve Technical Efficiency of Mining Machinery

In the grinding operation to improve grinding efficiency, improve mineral indicators. How can we improve the technical efficiency of the grinding? Described in the previous question, consider the following aspects:
One, the use of closed circuit grinding process
The grinding process is the mineral particles to be ground to monomer separation should quickly from the mill discharged from. One hand, this can be avoided through the mill grinding media (ball), on the other hand can make full role in the coarse mineral particles, so that energy can do useful work. Existing mill to particle size classification is very difficult, for grader or fine sieve mill mineral qualified grain size separation, coarse regrinding (also return to the mill said back to sand). Visible in the closed circuit grinding mill to mine new ore plus return sand, so the mill through the material, the material on accelerating the speed of the grinding machine. Is grinding to a short time. Force failed in the closed circuit grinding, coarse repeatedly through the mill until the mill to qualified so far. Followed by closed-circuit grinding, because a lot of grit to into the mill to the compound content of coarse fraction increased. According to the principle of grinding kinetics. At this energy for useful work to maximize the speed of the grinding mill productivity gains. In addition, due to the presence of appropriate amount back to the sand, we can eliminate the mill to the volatility of the mine product size.
Visible, closed-circuit grinding can effectively avoid the crushed and "Coarse". It enables the grinding operation, uniform coarse granularity to ensure that qualified under the premise of narrow-level products, this is beneficial to the next sorting operation.
Two, using different mill
Production practice proves that the nesting around the mill can reduce the crush. More meaningful, especially for brittle mineral. Mill row of ore faster, Shen pulp underlying density of mineral particles easily discharged, a rod mill for grinding media parallel to the long steel bars, so can reduce the crush phenomenon. In addition, due to the shallow surface of the mill slurry. Pulp on the buffering effect of grinding media. Can give full play to the crushing effect of grinding media, mill production capacity.
Choice of grading equipment, using a fine sieve and mill closed circuit, or a pre-classification has some advantages. With a fine sieve for grading equipment. More stringent control of the mill product particle size, particle size cannot drain away to avoid "running rough" phenomenon. Followed by sieve screening efficiency, about 80-90%, spiral classifier, rake classifier is usually only 40-60% of the grade efficiency. This is likely to cause the fine-grained level re-qualified into the mill, resulting in the smash phenomenon.

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