Ball mill slipper ring crack repairing method and closed impeller structure

Abstract

The invention discloses a ball mill slipper ring crack repairing method. The method comprises the following steps that S1, thorough planing is carried out on a crack at a connecting part of a slipper ring and an end plate, and then weld joint treatment is carried out; S2, the slipper ring and the end plate are reinforced through evenly-distributed square steel plates; S3, after welding is completed, stress relief treatment is conducted in a high-frequency electromagnetic heating and flame heating heat preservation manner; S4, the surface of the slipper ring which is deformed due to welding is turned to be round, and then the slipper ring is ground to be smooth; S5, a bearing bush is drawn out and scraped again, after a journal is machined, a grinding body is jacked up, and the bearing bush is lifted out for grinding and scraping; and S6, horizontal correction of a mill barrel is carried out, a base plate is added between a bearing bush seat and the spherical bottom according to the turning amount, or the relative distance of the bearing bush seat is adjusted to ensure that the center line of a mill body is consistent with the original center line. The repaired structure has the effects of being high in structural strength, stable in use and operation and long in service life.

Description

technical field [0001] The invention relates to the technical field of ball mill reinforcement, in particular to a method for repairing cracks in a ball mill sliding shoe ring and a closed impeller structure. Background technique [0002] With the rapid development of dry process kilns in China's cement production industry, from 800 tons per day to 10,000 tons of cement lines per day, the equipment for grinding cement has also become larger. 3.8*13m to 4.2*13m ball mills have become the leading equipment for cement grinding today. The ball mill equipment used to be supported by a single bearing pad, but it was changed to refer to figure 1 , 2 , The double bearing bush 1 shown in 3 is in the form of a 60-degree angle support, and the sliding shoe ring 2 for supporting the ball mill slides with the bearing bush 1. Correspondingly, in recent years, there have been many cases of cracks 3 appearing in the connection between the shoe ring 2 and the end plate 4 in large mills. ...

AI Technical Summary

Problems solved by technology

This resulted in a large increase in costs and a substantial extension of the construction period.

It can be seen that the slip shoe ring 2 crack 3 has become a difficult problem in cement production today

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