The speed of the ball mill grinding efficiency of the mill speed motion which always affect the mill grinding media and materials, and, due to changes in the rotational speed of the grinding media and materials doing different sports, different sports in the state , ball mill grinding efficiency is also changing. Ball mill grinding media and the material inside the ball at different speeds, can be divided into the following three types of motion: diarrhea fall-motion; the falling motion; centrifugal movement. Mill normal operating state or drain off into the falling type motion. Mill critical speed empirical formula where n - ball mill critical speed (r / min) D - the inner diameter of the cylinder (cm) by observing the experiment and practice analysis, the more close to Ball Mill, Liaoning ball, grinding media volume The larger, give full play to the role of the outermost layer of crushed material to, in order to make bigger mill efficiency. When informed by a theoretical calculation, from the angle of the outermost layer of the grinding media is 54.73 °, the outermost layer can obtain the maximum drop height of the material to most effectively crushed. From the practice found that when the ball's operating speed is adjusted to the critical speed of 0.75 to 0.85, you can make grinding media at a higher drop height. From the above analysis showed that the speed of the ball mill in which the best efficiency at work. Can also be seen, ball mill parts, much more research analysis ball sport, you can benefit from. Bush scraping techniques ball mill is the material to be broken, and a dry ball mill, and then the key equipment for grinding. As a key equipment Mineral production, and its operating conditions directly affect the yield and quality of beneficiation. Main bearing is an important part of the ball mill, the main event of burning bush incident, we need to be scraping the tile surface. Ball bearing material currently use mostly Babbitt, has good toughness, less wear and impact resistance. Some tips scraping the ball bearing. A reasonable determination of the bush bearing zone bearing zone refers to the area of ??contact of the ball journal and the bush. Split sliding bearings to withstand radial load direction perpendicular to the surface should be split, bearing in vertical split surface area of ??about 30 degrees or less. Therefore, should the bearing of the main bearing area is set within the range of the lower portion of the contact angle of 60 degrees in the bush. Second, the optimum contact angle selected optimum bearing bush contact angle should be 70 degrees to 80 degrees, when the contact angle scraping selected, will occur in a ball mill in operation after a certain amount is increased, because the hollow ball axis radial thermal deformation when heated. If the bearing contact angle increases, the film is not well maintained, so that until the burning bush rapid wear. So to determine the initial contact angle of the bush and to ensure good quality of scraping. In determining the wedge-shaped gap on both sides of the wedge-shaped gap refers to the bush bearing area of ??the gap (backlash), the backlash value is an important parameter of hydrodynamic plain bearings, its value by the speed, oil viscosity and bearing load of the shaft is determined. Ball is in the low-speed operation under heavy load, lubricant viscosity is generally greater, bearing backlash values ??generally range from 0.2 ~ 0.3mm of wedge-shaped gap. Fourth, the significant point is that the area was point carrying the final process of scraping process, before scraping point for a rough scrape. Take in the oblique moire method of points, points evenly distributed within each texture, which was the point should be clear, uniform and distinct feel. The good scratch pad installed, continuous heavy vehicles Turning two to three hours, so that was the point of full contact surface of the tile, but a preliminary hardened layer, which minimizes the heat generation bush repaired and put into operation after occur. Mill manufacturers | North Mine Zhongcheng (certified) | Ball from Shenyang North Mine in Liaoning Zhongcheng machinery Limited. Shenyang North Mine Zhongcheng equipment Limited (sybkzc.com) (www.sybkzcjq.com) Liaoning Shenyang, machining leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum meet customer needs. In North mine public into leadership with the staff warmly welcome all inquiries negotiations to create the North mine public into a better future.