Lining of rod mill

Abstract

The invention discloses a lining of a rod mill. Lining plates are uniformly and densely distributed on the inner wall of a cylinder of the rod mill and fixed on the inner wall of the cylinder; each lining plate is rectangular; the shape of a cross section of the lining plate is as follows: the middle of the cross section is a protruding arc line, the height of the protruding arc line is 1.5-3 times that of the edge of the lining plate, particularly 1.8-2.2 times, and the width of the protruding arc line is 0.3-0.7 times that of the whole lining plate. The lining of the rod mill disclosed by the invention has a good grinding and separation effect, high production efficiency and a simple structure; the lining plate of the lining of the rod mill has a more reasonable section shape; when in work, a grinding rod can be uniformly driven, the lining plates of the rod mill form an integral structure when being embedded into a circle; and each lining plate uniformly bears the weight of a grinding rod cluster when rotating to drive the grinding rod.

Description

technical field [0001] The invention relates to a grinding device, in particular to a part of a rod mill used in the chemical fertilizer and coal chemical industry to grind coal with gasification coal-water slurry. Background technique [0002] Rod mill and ball mill are the mainstream production equipment for pulverized coal block grinding. Among them, the ball mill uses the impact of spheres to crush materials. The main disadvantage is that it cannot directly produce products with a certain particle distribution. The production process often results in waste of raw materials and low production efficiency. ; while the existing rod mill comprises a feeding part, a cylinder body, a discharge part and a driving device, and is also provided with support bearings, the supporting bearings are located at both ends of the cylinder body, and the driving device drives the cylinder body to rotate, and the cylinder body is also provided with Grinding rods and liners whose thickness are...

AI Technical Summary

Problems solved by technology

[0002] Rod mill and ball mill are the mainstream production equipment for pulverized coal block grinding. Among them, the ball mill uses the impact of spheres to crush materials. The main disadvantage is that it cannot directly produce products with a certain particle distribution. The production process often results in waste of raw materials and low production efficiency. ; while the existing rod mill comprises a feeding part, a cylinder body, a discharge part and a driving device, and is also provided with support bearings, the supporting bearings are located at both ends of the cylinder body, and the driving device drives the cylinder body to rotate, and the cylinder body is also provided with Grinding rods and liners whose thickness are distributed according to a certain rule, the liner is inlaid on the inner wall of the cylinder, the discharge part is a trommel screen, the working process of the rod mill is: the cylinder is driven by the driving device to rotate, equipped with a grinding The rod rotates with the cylinder, and the grinding rod is moved upward by the protrusion of the upper lining of the cylinder until it is thrown down to a certain height, then the raw coal is ground between the grinding rod and the cylinder lining, and the coal slurry formed after being ground The outflow of the cylinder enters the drum screen rotating with the cylinder, the impurities and coarse particles enter the coarse particle chute as the oversize, and the finished coal-water slurry enters the coal slurry mixing tank as the undersize to achieve the effect of separation and reduce the possibility of pulp running; The cross-sectional shape of the liner of the existing rod mill is a square tooth shape or similar shape. When the liner of this shape drives the grinding rod to work, it will produce uneven driving force on the head and tail of the rod. The grinding effect of the mill is not good, and it will lead to the occurrence of disordered rods and broken rods

[0003] In addition, when the liners of this rod mill are inlaid on the inner wall of the cylinder, each liner is generally fixed by two to three screws. Due to the heavy weight of the grinding rod bundle, each liner bears The force of the rod mill is extremely large, and it is easy to loosen the screw fixing part of the liner. Therefore, the existing liner structure of the rod mill is prone to slurry leakage

And maintenance is a very costly and laborious thing, which also greatly affects the production efficiency.

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