How to repair the ball mill liner?
Date:2020-02-14 00:15:57
Author:admin
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130
Whether it is wear-resistant steel balls or liners, all wear-resistant materials are subject to wear and corrosion. Due to the impact, grinding, sliding, rolling and rebound movement of the grinding medium of the ball mill equipment, and the abrasive action of the material being abraded, the liner will wear.
The worn-out liners should be replaced in time without the need for repair. Only when the spare parts of the lining board are scarce and the wear is not serious, the surfacing repair method is used for the lining board.
1. Remove the liner and clean the working surface of the liner until the bright metal is exposed;
2. Insert graphite plugs into the bolt holes of the lining board to ensure that the bolt holes will not become smaller after surfacing and facilitate the fixing of the lining board;
3. Place the liner to be repaired on the construction site of the overlay welding site, and place it as horizontally as possible so that the working surface of the liner faces upwards;
4. Surfacing electrode: such as tdmn (180) or tdcrmn (220), low hydrogen type electrode;
5. Trim the work surface to remove debris such as welding slag and burrs around the liner. Surfacing can be performed by manual arc, so that it can be applied by skilled workers.
6. The surfacing procedure is to surfacing the steel surfacing layer, then surfacing the combined surfacing layer, and then surfacing the wear-resistant alloy surfacing layer. This multilayer surfacing method can be used to repair the non-alloy steel cone ball mill liner. head liner and other parts.The overlay welding is divided into many narrow sections, and the layer overlay welding is performed in order. In the post-surfacing process, the working surface shape of the lining board (such as stepped and wavy lining boards) should be in accordance with the original design, and it must be smooth and flat to minimize the amount of trimming.
