... degree of hardness and the percentage of sand productivity is about 40-70%.The machine can be widely used in the ... , cement, refractory, abradant, raw glass material, building aggregate, and sand-making, especially for the materials with medium and high degree of ... for PL ST series, the product less than 5mm will account for 40%-60% Vertical Shaft Impact Crusher. VSI, Sand Making Machinery, Impact ...