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, so as to reduce Consumption, the effect of increasing the number of turnover

Active Publication Date: 2008-07-09
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 of the tundish body to be repaired is cleaned first, 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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PUM

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Abstract

The invention relates to a middle package liner repairing method. The method adopts a hot repairing mode for a the middle package for a lower line; under a temperature of 100 to 140 DEG C, firstly cleans the position of the middle package of a body needed repairing, then spray a phosphoric acid wedding agent uniformly on the position to be repaired; uniformly coats the hot repairing material after mixed on the position to be repaired with a coating thickness of 4 to 6mm higher than the surface of the body. The method directly uses the repairing material with no water to carry through hot repairing on the crack or defective part of the liner for the middle package turning over the lower line, improves the turning over times of the middle package, reduces the consumption of the middle package and has a good repairing 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 mater...

Claims

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Application Information

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Patent Type & Authority Applications(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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