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What are the techniques for repairing wear-resistant ceramics for coal mills?

2021-12-13
 Latest company case about What are the techniques for repairing wear-resistant ceramics for coal mills?

A coal mill is a machine that crushes and grinds coal into pulverized coal. It is an important auxiliary equipment for pulverized coal furnaces. The coal grinding process is a process in which coal is broken and its surface area is constantly increasing, which is easy to wear. Coal pulverizers generally adopt ceramic chip wear-resistant protection. After a few years, the internal roller frame and hinge shaft, tripod, annular duct, and straight pipe, the inner wall of the separator, and the outlet powder pipe area of the coal pulverizer will be severely worn. , It is necessary to repair the severely worn and fallen parts of the wear-resistant ceramic sheet to ensure the safe and stable operation of the equipment.

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Coal mill is a machine that crushes and grinds coal into pulverized coal. It is an important auxiliary equipment for pulverized coal furnace. The coal grinding process is a process in which coal is broken and its surface area is constantly increasing, which is easy to wear. Coal pulverizers generally adopt ceramic chip wear-resistant protection. After a few years, the internal roller frame and hinge shaft, tripod, annular duct and straight pipe, the inner wall of the separator, and the outlet powder pipe area of the coal pulverizer will be severely worn. , It is necessary to repair the severely worn and fallen parts of the wear-resistant ceramic sheet to ensure the safe and stable operation of the equipment.

 

Construction process of repairing ceramic sheet of coal mill:

1. The repairing construction process of the ceramic sheet of coal pulverizer: surface dust removal, mechanical rust removal cleaning coating ceramic sheet glue pasting ceramic sheet self-inspection and trimming.

 

2. Dust removal and rust removal on the surface of the coal mill: Use an angle grinder to clean up the floating dust and rust on the construction site, exposing the original steel body.

 

3. Manual mechanical polishing pretreatment: Use an angle grinder to clean and roughen it at a certain angle, and then clean the surface with alcohol to make it have a certain surface cleanliness and roughness, and the rust removal level is Sa2.

 

4. Cleaning of coal mill: clean the surface with cleaning agent after rust removal.

 

5. Apply wear-resistant ceramic viscose: mix ceramic sheet viscose and curing agent according to the ratio of 1/2, adjust the glue time in 2 minutes, so that the AB glue is evenly mixed, and then scrape coating on the construction site and the ceramic sheet, the adhesive Spread evenly, and there should be no leakage or air bubbles.

 

6. Paste the ceramic piece: repair the worn and uneven construction parts with a ceramic repair agent, and then paste the scraped ceramic pieces on the construction part in order and stagger, and tap it firmly with a rubber hammer. The welding seam is polished and smooth, the bonding is firm and smooth, and the gap between the ceramic sheets is not more than 0.5 mm.

 

7. Self-inspection and trimming: check after the paste is completed, the outer surface of the ceramic sheet is smooth and flat, without deep scratches and cracks, to ensure that the paste is flat and the surface is smooth, and the unqualified parts should be repaired in time.