Ore which exploited from mine mountain, ore block is large, the largest particle size is generally about 500 mm. But the phosphate material disseminated fine-grained, and closely integrated with symbiotic minerals and gangue. So before sorting, the ore must be approved by the crushing and grinding, so that full dissociation of phosphate rock materials. Crushing and grinding to achieve particle size mainly depends on the dry dip of the phosphate material particle size and beneficiation, phosphate generally flotation. Crystalline apatite disseminated particle size is generally 0.5 to 0.1 mm, the finer granularity of glial phosphate dip is generally less than 0.1 mm.
Mining crusher refers to the crushing machinery whose content is more than 50% of the total content ,the row compound particles is larger than three millimeters. Which is invented by British Heng. according to the size of feeding and nesting granularity , the crushing operations is often divided into the rough crushing, medium crushing and fine crushing these three categories. The commonly used equipment are jaw crusher, impact crusher, impact crusher, compound crusher, single-stage hammer crusher, vertical crusher, gyratory crusher, cone crusher, roll crusher machine, double roll crusher, two-in-one crusher ,and so on.
More fine the disseminated particle size is , the grinding particle size should also be more fine, otherwise, the phosphorus minerals and gangue minerals can not be achieved the separation of the monomer, a direct impact on the quality of the selected points. Therefore, crushing, grinding the ore separation are all the prepared job. Production practice is not broken ore survived fine as possible. Because, first, ore crushing survived fine, the greater power consumption and the wear on the increase in processing costs. Second, ore is crushed too fine, it is bound to generate a lot of fine mud, resulting in over crushed fine mud to influence the election process, to reduce the effect of selected points.
So before the separation work, the right decision crushing particle size must be made, it came to power in the technical and economic grounds. Around the early mining gneiss siliceous apatite ore, basically on the surface regolith, mined ore is relatively soft, the grain size is generally small, and some mining areas are not even directly after breaking into the grinding and grinding before you enter the mine sieve, sieve out large pieces of artificial broken, and then send to the ball mill.
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