Steel ladle repairing material produced by using recycled waste corundum nozzle seating brick material and method for repairing steel ladle lining by using the same

Abstract

The invention discloses a steel ladle repairing material produced by utilizing a recycled waste corundum nozzle seating brick material and a method for repairing a steel ladle lining. The repairing material is prepared from 84% of the waste corundum brick material (comprising 15% of a granular material with the particle size of 6-3 mm, 25% of a granular material with the particle size of 3-1 mm, 35% of a granular material with the particle size of 1-0 mm and 9% of 200-mesh powder), 5% of spinel powder, 2% of fused magnesium powder, 4% of activated aluminum oxide micro powder and 5% of 71 cement. All the raw materials are evenly mixed in a mixing mill, discharged, packaged in bags and stored in a damp-proof mode. When the steel ladle repairing material is in use, when a steel ladle is off line and needs to be repaired, a proper amount of the steel ladle repairing material is weighed according to the repairing area, water accounting for 4-5% of the total weight of the material is added, and the materials are stirred uniformly in a stirrer for standby application; residual steel slag, attachments and dust on the inner wall of the steel ladle are cleaned up; a to-be-repaired place is smeared with the repairing material until the to-be-repaired place is flat; smearing is performed for the second time after ten minutes; and then the to-be-repaired place is naturally aired for 8 hours and then normally baked.

Description

technical field [0001] The invention relates to refractory materials, in particular to a ladle repair material produced by recycling waste corundum seat bricks. Background technique [0002] Ladle lining bricks will be eroded by high-temperature molten steel during continuous use, resulting in the gradual thinning of ladle bricks, especially the erosion of individual bricks with low body density is more serious, and even pits and unevenness appear. In order to keep these heavily eroded bricks in sync with the majority of evenly eroded bricks, these heavily eroded bricks must be repaired. Commonly used repairing materials include repairing bricks and bauxite repairing materials, but when the corundum nozzle seat brick and corundum venting seat brick are severely corroded, the repair effect is not good after using the first-grade bauxite repairing material for repair, and it will not take long Cracks and peeling will appear every time, mainly because the bonding effect is not...

AI Technical Summary

Problems solved by technology

Commonly used repairing materials include repairing bricks and bauxite repairing materials, but when the corundum nozzle seat brick and corundum venting seat brick are severely corroded, the repair effect is not good after using the first-grade bauxite repairing material for repair, and it will not take long Cracks and spalling will appear every time, mainly due to poor bonding effect, low compressive strength, and poor thermal shock resistance.

Each ladle needs to be repaired at least 2-3 times before it goes off-line, and the use of more materials will increase the cost accordingly

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