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 dry-type ball mill, 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 the greater the amount of close to Ball Mill, grinding media, 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, much more research analysis ball sport, you can benefit from. Ball mill test what issues need attention after the installation is complete, the mill price, the need for a full range of inspection, there is no problem after commissioning work can be carried out. Before starting commissioning, mill manufacturers, must be prepared to work and inspection work and so on. So what issues need attention ball test it? Continuous operation 1. The mill empty load test run should be between 12 to 24 hours, if the operation should promptly solve problems found. 2. After air load Turning confirm eligibility, can be carried out air load (without the ball, do not feed) test. 3. The operation of the process to check the lubrication lubrication, to ensure no leakage. The mill main bearing temperature must not exceed 50 degrees, if the main bearing temperature is too high, we must take measures to cool. 5. To ensure that no significant changes in energy consumption, more than eight hours of continuous operation, no abnormal incidents. 1. load test load test before a ball mill to join the 20-30% of the specified amount of load of steel balls and materials, running 8-10 hours. After normal operation, the amount added in the ball milled for the job. 2. Load test, the feeding situation should typesetting material, to avoid unnecessary ball and cylinder liner wear loss and damage. 3. To ensure that the entire ball smooth, Liaoning ball, no sharp vibration. If severe vibration should promptly review and eliminate the fault. 4. Check the friction parts, friction parts are not permitted burn-in phenomenon. 5. ball around seal must be kept in good condition, there can be water leakage, oil leakage. Liaoning Zhongcheng ball _ _ North mine mill equipment from Shenyang North Mine Zhongcheng machinery Limited. _ North Mine in Liaoning Zhongcheng ball mill equipment _ Shenyang North Mine Zhongcheng equipment Limited (sybkzc.com) (www.sybkzcjq.com) this year introduced a new upgrade, the above picture is for reference only, please call this page or Tel picture on to obtain the latest information, contact: Yang Zhongbin.