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VSI(vertical shaft impact) crusher is widely used in mining, cement, sand-making, metallurgy and so on. As there’re high speed impact, the rotor should be wear resistant and can bear the impact of the rocks, ore and other materials. Previously we use steel rotors usually, however, more and more people are using rotors with welding tungsten carbide strips, coz it’s performance are much better. As economy is developing, there are more and more demand for construction material like sand, cement and so on. The demand for tungsten carbide in VSI will be bigger in future.