Raymond Mill Manufacturer

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Problems with traditional Raymond Mills

Due to the backwardness of technology, traditional Raymond Mills have many problems in production. In this paper, we analyze the problems existing in the operation of the Raymond Mill and propose a reasonable transformation plan.


Ordinary low- and medium-chromium steel balls have poor wear resistance due to the backward casting process and materials. The diameter of the grinding balls is not balanced during the wear process, which causes the gradation of the grinding balls to deviate greatly, meeting the grading requirements. The proportion of grinding balls is reduced, and the proportion of dead balls is increased, resulting in poor fineness of coal powder or reduced production of coal powder.

Diameter & phi; 30 or more grinding balls account for more than 70% of the total weight, resulting in the same weight of the grinding ball, the action point or the area of ​​action is reduced, the grinding efficiency is not high.

The function of the corrugated wire of the Raymond Mill cylinder is to better bring the steel ball up, but after long-term operation, the ribs of the lining plate are seriously worn, and the steel ball can not be taken up, which can not effectively move the inside of the Raymond Mill. The coal-fired mill is made into qualified coal powder. At the same time, the head of the lining countersunk head bolt is seriously worn, and the powder of the tank lining bolt often leaks during operation. The factors affecting the powder output of the Raymond Mill are: the slamming of the steel ball, the grinding between the steel ball and the steel ball and the Raymond Mill lining, the drying of the hot air and the carrying of the dry wind. Therefore, in order to improve the powder output of the Raymond Mill, it is necessary to improve the wear resistance and hardness of the grinding ball, increase the grinding area per unit weight of the steel ball, optimize the fineness of the coal powder, reduce the loading of the steel ball, and reduce the power consumption of the milling powder. Ball consumption; improve the lifting ability and wear resistance of the lining, and extend the service life of the equipment.

The Raymond Mill separator adopts Raymond gravity radial separator, symmetrically arranged at both ends, and equipped with adjustable blades, which can adjust the fineness of coal powder according to requirements. However, there is a disadvantage that the volume is small, the strength is large, and the separator has a large resistance. At the same time, because the raw coal is mixed with straw, cloth strips, iron wire and other sundries, it is wound on the baffle blades when the closely arranged separator is folded toward the baffle plate, and is often blocked on the separator returning powder locker, resulting in separation. The separation effect of the separator is deteriorated or even the separation ability is lost, resulting in poor uniformity of fineness of coal powder, high combustibles of fly ash and high carbon content of large slag.

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