Impact crusher is a popular kind of crushing equipments featuring its high efficiency, small volume, simple structure, high crushing rate, low energy consumption, big outputs, even distribution of fineness and the selective crushing function. All these make the impact crusher a crusher with a bright prospective. However, the biggest shortcoming of this crusher is the easy abrasion to blow bars and impact packs, especially for the highly hard stones, which needs regular replacement. Thanks to some wear-resistant materials, the impact crusher gets access to metallic mining plants. The impact crusher is widely applied in the metallurgy, the mining industry, the concrete preparation, the chemical industry, the ceramic and other industrial sectors like highway construction, water reservoir project, construction crushing and sand making industry. The impact crusher uses impact energy to crush materials. When materials get into the area where the board hammer is, the crushed ones are thrown to the impact device above the rotor continuously under the impact function of board hammer at a high speed. Then they are rebounded from the impact liner back to repeat the above process. The unqualified materials will get into the impact cavity for being crushed repeatedly. The process is going on until the materials are crushed to the required fineness and then discharged from down of the machine. The impact crusher has the advantages as follows: 1. Good adaption to the hard stone crushing, 2. The new wear resistant materials extend the life span of blow bars, impact packs and liners. 3. Low energy consumption, high outputs and big crushing rates. 4. The good cubic shape and adjustable finished fineness. 5. The hydraulic cushioning system, easy maintenance and replacement of the parts.Tuff is used widely, for example in surface modification, high-grade industrial packing, flexible abrasive, synthetic silicon limestone, light-weight aggregate, water clarifying agent, high silicon...