Sand making machine is also called PCI impact crusher. On the basis of years of research and development of mining machinery and equipment, combined with the actual situation of domestic sand production, Mr. Bai Yinghui, an expert, absorbed the principle and technology of the famous "stone-breaking" crusher of Bamak Company in the United States, and developed high-efficiency and high-yield gravel equipment with domestic and international leading level. The performance of sand maker plays an irreplaceable role in all kinds of ore fine crushing equipment. It can crush all kinds of hard rocks (rock, granite, basalt, limestone, river pebbles, etc.). ) into building sand and crushed stone materials with various particle sizes. The sand has uniform particle size and high compressive strength, which is more in line with the requirements of high-standard building sand than natural sand and hammered sand, and can improve the building quality. Application field of sand making machine Sand making machine is suitable for crushing and molding soft or medium hard and extremely hard materials, and is widely used in various ores, cement, refractories, alumina clinker, emery, glass raw materials, machine-made building sand, stone materials and various metallurgical slags, especially for high hard, extremely hard and wear-resistant materials such as silicon carbide, emery, sintered bauxite and fine sand. In the engineering field, it is an ideal production equipment for machine-made sand, cushion material, asphalt concrete and cement concrete aggregate. In the mining field, it is widely used in the pre-grinding process, which can produce a lot of fine ore and reduce the high-cost grinding load. Working principle of sand making machine: The sand making machine is broken by the friction between high-speed rotating materials (stone breaking), and its maximum particle size must meet the particle size specified in the technical performance parameter table of the machine, and materials larger than the specified particle size are prohibited from entering the crusher. The maximum water content of the crusher is below 20%, and generally the ore coming out of the sand washer can directly enter the crusher for crushing. The particle size of sand mill is related to the physical properties of ore and the particle size of feed. The ore is fragile, and the smaller the feed particle size, the higher the qualified rate of product particle size. On the contrary, the lower. Changing the impeller speed can also adjust the product particle size. The pass rate is 60-90% when the particle size of the sand machine is not more than 65438 00 mm. In order to ensure that the qualified rate of product granularity reaches 100%, it is necessary to use classification equipment for closed-circuit crushing. The installed power of the sand making machine can be configured within the specified range according to the physical properties and output of the material (users can provide the type of crushed ore, feeding size, discharging granularity, etc. , and then our company is responsible for matching the corresponding models, and can also be configured according to the specific requirements of customers). The material enters the impeller of the rotor through the inlet, and the impeller rotates at high speed to throw the material out of the impeller wheel, and the ice cubes hit the impact plate and break, and then the fine-grained material is discharged from the bottom of the frame. This kind of crushing adopts internal air circulation system, and the air generated when the impeller rotates at high speed forms self-circulation inside the crusher. In addition, when it is necessary to separate the crushed materials from the crushed products, a classification cyclone is configured to realize the classification and extraction of the materials by relying on the pressure generated by the airflow inside the crusher, thus solving the problem of dust dispersion and purifying the environment without increasing power consumption. The materials are thrown out by the high-speed rotation of the impeller and directly hit the liner, and some materials rebound and collide with other materials, so that the materials that meet the equipment requirements flow out of the crushing chamber, while the materials that fail to meet the standards continue to run in this process until they meet the standards. This kind of sand making machine is also called "stone to stone" crusher. The particle size distribution of impact sand maker is related to feeding performance, impeller speed, the ratio of non-material density in crushing cavity to rotor feeding amount. The more brittle the material, the higher the impeller speed and the higher the content of fine-grained products. From:/