Standard lining method of LRF furnace

Source: | Author:ChangXing Refractory | Published time: 1595 days ago | 1398 Views | Share:

1. New ladle materials that need to be prepared before masonry: joint material, knotting material, asbestos board, T-3 brick, nozzle block brick, purging plug well block, aluminum magnesium carbon brick for wall and bottomm, magnesia carbon bricks for slag zone and so on.

2. Paste a layer of asbestos board on the bottom of the bag before masonry, and temporarily place the nozzle brick in the position of the nozzle hole. The breathable seat brick is placed at the position of the breathable hole.

3. Use knotting material to tie a permanent layer with a thickness of 65mm on the asbestos board, and wait for the permanent layer to dry naturally or under a small fire.

4. Remove the nozzle bricks, fix the nozzle seat bricks, and build T-3 bricks along the nozzle seat bricks and the ventilation seat bricks herringbone on the permanent layer. The mud should be full and the brick gap should not exceed 2mm.

5. The joint between the bottom of the bag and the wall of the bag is filled with knotted material, and the bottom of the bag is required to be flat.

6. After spreading evenly with mud on the bag wall, paste the asbestos board. Then the T-3 bricks (permanent layer) are laid in a ring shape, requiring vertical masonry.

7. Smooth evenly with mud on the permanent layer of the clad wall, and then build the aluminum-magnesium corundum bricks circularly, 4 to 5 pieces plus 1 adjusting brick, about 7-8 layers. Masonry of magnesia carbon bricks at the slag line, about 3-4 layers. The overall curvature of the working layer is required to be close to the permanent layer. The brick surface is flat, the mud is full, and the brick gap does not exceed 2mm.

8. Herringbone masonry is adopted at the bottom of the bag along the ventilation seat bricks and the nozzle seat bricks. The gap between the bottom of the bag and the wall of the bag is filled with knotted material and compacted to form a slope without forming a right angle.

9. Ladle baking time: 24h for newly-built ladle. Overhaul the ladle (the working layer is fully built) 12h, and the minor repair (slag changing line) 4h.

10. Install ladle well block and purging plug block after the ladle is baked and cooled naturally for 8 hours. Bake 2h before using.