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With the development of modern science and technology, now concentrator of ore crushing, is mainly used to crush, breaking, breaking, grinding, the impact of this five kinds of methods of comminution. Most of impact crushing effect best. But for different ore actual operation are not the same, then according to different ore crushing, how to choose the way, will have the best grinding effect?
Effect of crushing the worst — grinding grinding, because it is in the ore on the surface, to crush the fine ore, its large surface area in the case of more favorable.
– pressure comminution for ore and crushing surface contact area is large, so it need the pressure is also big, the energy consumption is more.
– breaking due to stress concentration of ore crushing, bending stress and crushing in addition to Chinese and foreign, and bending moment. The required force is small, the energy consumption is less.
Comprehensive experiment — breaking and bending crush force required only the crushing force of 10%-20%. Currently used to smash equipment often has the several force combined action.
In fact, all of the ore structure is not uniform, there are all kinds of flaws and cracks, and some metal ores are often mixed with other useful minerals and gangue, in these mineral interface binding force, more often than the same kind of internal mineral binding force is much smaller, therefore, in the broken ore, the first is the most vulnerable sections along the split, with the particle size of the ore is crushed and more small, the fragile surface is gradually decreased or disappeared. The ore is increasingly strong, which is why the similar ore, as the particle size decreases, harder broken reason. Particles finer, crushing the more difficult
Prompt attention is, in general there are a variety of ore minerals, their physical properties are not the same, sometimes still has very big difference, when this kind of ore crushing, wherein each mineral crushed scene are not the same, some were crushed into fine particles, but some thick. This phenomenon is called for the selective comminution. Selective crushing is the underlying cause of ore minerals mechanical properties vary greatly, but crushing machinery also affects the performance, such as crusher and mill since it is easy to produce selective comminution. Pay attention to this phenomenon in the beneficiation process is very important. For example, the useful minerals than gangue is easy to slime ore, be first liberated containing mineral more grade separation, does not have to wait for all the ore material grinding to the same fineness, from be helpful for reducing pulverization.
Finally, attention to detail, and only picked the crushing equipment, in order to achieve the best effect of crushing, can bring us a better benefit!
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