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Method for repairing inner lining of tundish

A tundish and inner lining technology, which is applied to ceramic molding machines, casting molten material containers, manufacturing tools, etc., can solve problems affecting production safety, cracks or defects in the tundish inner lining, and difficulties in the normal turnover of the tundish, and achieve improved The effect of turnover times and consumption reduction

Active Publication Date: 2009-11-18
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] After the casting is finished and the tundish is disassembled, the lining of the tundish will have cracks or defects in varying degrees. If it continues to be used directly, it will affect production safety; the original cold repair material preparation process is: after the tundish is completely cooled, use The special mold made of steel plate is supported inside the tundish, the repair material is stirred and poured into the gap between the mold and the tundish body, knotted with a vibrator, and the mold and support frame are taken out after 12 hours of health preservation, and then It takes about 5 days to dry and heat up and bake.
The traditional cold repair method is time-consuming and material-intensive, which will make it difficult for the normal turnover of the tundish

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for repairing the inner lining of a tundish. The method adopts a hot repair method for the off-line tundish. Under the condition of a temperature of 100-140°C, the position to be repaired of the tundish body is first cleaned, and then the position to be repaired is evenly repaired. Spray the phosphoric acid binder, and then apply the mixed hot repair material evenly on the position to be repaired, and the thickness of the application is slightly higher than the surface of the body by 4-6mm. Rely on the normal temperature of the body to repair it firmly and dry immediately. The whole process takes 20 minutes, and then it can be used normally after directly applying the lining. The repair compound is made from the following ingredients in proportion by weight:

[0022] Corundum, 150-250 mesh, 10

[0023] Special grade bauxite clinker, particle size 1-5mm, 70

[0024] Al-Mg spinel, particle size 1-5mm, 4

[0025] Mullite, α-Al 2 o 3 with SiO 2 The ratio is 1...

Embodiment 2

[0030] A tundish lining repair method, same as embodiment 1.

[0031] The repair compound is made from the following ingredients in proportion by weight:

[0032] Corundum, 150-250 mesh, 15

[0033] Special grade bauxite clinker, particle size 1-5mm, 80

[0034] Al-Mg spinel, particle size 1-5mm, 6

[0035] Mullite, α-Al 2 o 3 with SiO 2 The ratio is 1:1; 250-300 mesh, 3

[0036] Admixture (pure silicon powder, explosion-proof fiber, steel fiber mixed) 1.5

[0037] Cement 5

[0038] After the above-mentioned raw materials are mixed evenly, the repair material is made. When in use, the weight ratio of the phosphoric acid binder (aluminum dihydrogen phosphate) to the repair material is 1:5.

Embodiment 3

[0040] A tundish lining repair method, same as embodiment 1.

[0041] The repair compound is made from the following ingredients in proportion by weight:

[0042] Corundum, 150-250 mesh, 8

[0043] Special grade bauxite clinker, particle size 1-5mm, 60

[0044] Al-Mg spinel, particle size 1-5mm, 3

[0045] Mullite, α-Al 2 o 3 with SiO 2 The ratio is 1:1; 250-300 mesh, 1

[0046] Admixture explosion-proof fiber, steel fiber 0.5

[0047] After the above-mentioned raw materials are mixed evenly, the repair material is made. When in use, the weight ratio of the phosphoric acid binder (aluminum dihydrogen phosphate) to the repair material is 1:5.

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Abstract

The invention relates to a method for repairing the inner lining of a tundish. The method adopts a thermal repair method for the off-line tundish. Under the condition of a temperature of 100-140°C, the position of the tundish body to be repaired is cleaned first, and then the tundish body to be repaired is cleaned. Spray phosphoric acid binder evenly on the repaired position, and then apply the mixed hot repair compound evenly on the position to be repaired, the thickness of which is slightly higher than the surface of the body by 4-6mm. The method directly heat-repairs cracks or defects in the inner lining of the tundish that has been rolled off the assembly line with a moisture-free repairing material, improves the turnover times of the tundish, reduces the consumption of the tundish, and has good repair effect.

Description

technical field [0001] The invention relates to a method for repairing the lining of a tundish. Background technique [0002] After the casting is finished and the tundish is disassembled, the lining of the tundish will have cracks or defects in varying degrees. If it continues to be used directly, it will affect production safety; the original cold repair material preparation process is: after the tundish is completely cooled, use The special mold made of steel plate is supported inside the tundish, the repair material is stirred and poured into the gap between the mold and the tundish body, knotted with a vibrator, and the mold and support frame are taken out after 12 hours of health preservation, and then It takes about 5 days for drying and heating and baking. The traditional cold repair method is time-consuming and material-intensive, which will make it difficult for the normal turnover of the tundish. The main components of the repairing material are cement, super-gr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D41/02B28B1/30C04B35/10
Inventor 那廷权邢贵彬田勇
Owner ANGANG STEEL CO LTD
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