Roll crusher is produced by Hongxing Machinery adopts foreign countries’ advanced technology and combined with their own creation, this machine is used for coarse crushing. Hongxing roll crusher is widely used in many fields such as mine, coal, chemical, building material and so on. With the fast development of economy, the demand of mining machines is increasing day by day. The roller crusher has the advantages of reasonable structure, well-made production, high productive volume, low energy consumption, convenient operation, less over powder crushing and breaking wet or viscous materials. The double roll crusher is suitable for crushing all kinds of materials with medium or low hardness. The production capacity, heavy weight and low ability to crush large-sized materials make it unsuitable for the roll crusher to crusher hard materials. It is a good choice for Indonesia coal crushing. Hongxing Machinery has successfully designed and manufactured a roller crusher which is suitable for crushing techniques and raw materials conditions at home and abroad. Due to the efforts we have made to further research the process system and improve the reliability of main engine, the running rate of roller crusher system has come to the level of ball mill system. The mature roller crusher technology has injected new vitality to the grinding system. The commissioning of roll crusher must contain there follow the step? First, the aerodynamic transfer test: the machine in use on-site, must be not less than 2 hours of continuous load operation test, dynamic change when the bearing temperature must not exceed 30 ?, the maximum temperature not more than long 40 ?, sprocket, gear, v-belt and rollers and other parts of rotation should be smooth, no unusual noise, no collision between the rolls. Second, load test: run tests in air on a sound basis to achieve in order to load running test, load test of time not less than 8 hours continuous operation. Third, you should determine the actual yield of compliance requirements, and the bearing temperature must not exceed 35 ?, crusher should be smooth, there should be more severe vibration, the fasteners should be secure. Each should be filled with grease and should be well sealed, no leakage. sand washing equipment: http://www.hxjq-mill.com/products/sand_washer.html