Improve hard, high-strength rock sand abrasion efficiency measures

1) The vertical shaft crusher feed particle size sand making machine rate increased to 15%. 2) After the broken <5mm sand sand directly into the product warehouse, to reduce the loss of processing steps. After adjustment equipment crushing conditions, the production process to achieve system design production capacity and quality indicators, it has made effective experience hard rock sand process design. 3) quartz sand quarry slate not only hardness, abrasion resistance, and because of metamorphism anisotropic arrangement, rock patchy distribution. Processing, after crushing machine cycles to squeeze, mainly after grinding broken to produce the large stone flakiness index exceeds specification lineal only high proportion, and the long side dimension of around 400mm, the subsequent crushing process difficult to adapt. In response to this situation, in addition to including the crushing cycle of broken discharge opening adjustment, sieving mesh and amplitude adjustment, broken cone crusher discharge opening adjustment process improvement, but also the use of the original system, a screen large stone and long workshop oversized stone (particle size of 150 ~ 250mm, a small number of more than 300mm) and so different from opening a secondary impact crusher, primary impact crusher crushing different line speed test, the results shown in Table 1. Crusher for large, improving stone flakiness of a significant effect, large stone, stone flakiness proportion dropped from 22% to 25% gyratory crusher product of impact crusher product of 6.4% to 9. 5%. This project provides us resolve product feed flakiness content control design case.