Crusher for Old Cement Concrete Pavement

The technology of application to old cement concrete pavement and rubble technology is the best technology for the old cement concret pavement at present.Impact crusher with heavy rotor can make good use of the impacting energy of its rotor, so that it often used for the coarse crushing, medium crushing and fine crushing of crisp materials with below medium hardness such as limestone, coal, calcium carbide, quartz, dolomite, vulcanization iron ore, gypsum and chemical raw materials.Currently, the amount of the natural gas is smaller and smaller, and only the machine-made sand is able to replace the natural sand in aggregates completely. The machine-made sand is the little stone particle with a diameter below 4.75mm except the soft rock and decomposed rock, which is formed after crushing and screening. And the mixed sand is the mixture of natural sand and machine-made sand. The society development turns people’s preference for natural sand to the preference for the machine-made one. There is no resource of natural sand in the regions like Guizhou, where the machine-made sand has been used for many years with a certain standard.Heavy-rotor impact crusher has the outstanding advantages of simple structure, big crushing ratio, low energy consumption, high output, light weight and cubic shape of the final products. Compared with hammer crusher, impact crusher has bigger crushing ratio and can better use the high-speed impact energy of the whole rotor.As for impact crusher, rotary speed is an important factor of influencing the crushing quality, efficiency and service life of this machine. However, crushing effect does not improve along with the increase of the rotary speed as high rotary speed will aggravate the abrasion of the main fling material head and seriously influence the service life of the machine. In addition, to improve the crushing quality and efficiency and service life of the machine, reducing the value and frequency of the maximum impact force is...