The working principle of the ball mill is that when the ball mill rotates, the cylinder body rotates to generate centrifugal force to bring the grinding body (ball stone) to a certain height and then fall down, causing heavy blow and grinding effect on the material.
When the ball mill runs, the materials are of different rules and shapes. In this shape, the ball mill operates at 50Hz power frequency, but after a period of grinding, the shape of the material is crushed and filled into the gap of the grinding body. At this time, the ball mill continues to operate at a power frequency of 50Hz. Only a small amount of material can be ground. If the speed of the ball mill can be changed at this time, and the speed of the ball mill can be reduced to a certain speed so that the grinding body and the material can be fully abraded, the ball mill can be greatly improved. The grinding efficiency, if unreasonably reducing the running speed of the ball grinding body, not only does not achieve the grinding effect, but is counterproductive. Therefore, adjusting the operation speed of the cylinder reasonably according to the relationship between the grinding media and the particle size of the material can effectively improve the work efficiency of the ball mill.
In the early stage of the ball mill, the starting current of the motor can reach 6-7 times of the rated current of the motor. In the soft start mode used later, the starting current of the motor can reach 4-5 times the rated current of the motor. These start-up methods have caused too much impact on the transformer network, resulting in large voltage fluctuations, declining power factor, excessive starting power, and accelerating the deterioration of the mechanical transmission facilities equipped with contactors and ball mills. Give users some negative factors.
In view of the various factors existing in the above ball mill, the technical personnel of our company and the headquarters R&D personnel have been tracking, measuring and testing for a long time. The ball mill combines the features of the Shenchuan inverter and the ball mill. In 2006, the QM series was introduced. It has a multi-speed output, adjustable and automatic tracking torque compensation function, which can limit the starting current of the ball mill within 2 times, vector control motor load status, so that the motor from beginning to end to do Useful work, to minimize energy consumption, energy saving rate can reach 10% to 20%.
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Chongqing Taishan Cable Co., Ltd. , http://www.cqbareconductor.com