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