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Patching material for carbonless ladle working lining

A carbon-free steel ladle and repair material technology, applied in the field of unshaped refractory materials, can solve the problems of poor smearing performance, poor slag erosion resistance, weak bonding performance, etc., and achieve easy smearing, good bonding performance, and effective good effect

Inactive Publication Date: 2013-03-06
WUHAN IRON & STEEL (GROUP) CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But unfortunately, at present, the repair materials for carbon-free ladle working linings of large domestic steel plants have always had the defects of weak bonding performance, poor smearing performance, and poor slag erosion resistance.

Method used

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  • Patching material for carbonless ladle working lining

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A repairing material for working lining of a ladle, the content of each component is calculated in parts by weight: Al 2 o 3 75kg of super-grade bauxite with a content ≥ 85%, the composition is: 15kg for 5mm ≥ particle size > 3mm, 25Kg for 3mm ≥ particle size > 1mm, 22Kg for 1mm ≥ particle size > 0.088mm, 13Kg for particle size ≤ 0.088mm; Fused magnesia with MgO content ≥ 95% 13kg, composition: 9Kg for 1mm ≥ particle size > 0.088mm, 4Kg for particle size ≤ 0.088mm; Guangxi white mud 3.5kg; dextrin 0.5kg; silica powder 3 ㎏; Aluminum oxide powder 5㎏.

[0029] Preparation Process:

[0030] Weigh the above raw materials according to the formula, add them into the forced mixer and stir, first add aggregate, then add fine powder, micro powder and binder and stir for 3 to 5 minutes, and the material can be discharged after stirring evenly.

Embodiment 2

[0032] A repairing material for working lining of a ladle, the content of each component is calculated in parts by weight: Al 2 o 3 78 kg of corundum with a content ≥ 85%, the composition is: 22 kg for 5 mm ≥ particle size > 3 mm, 20 kg for 3 mm ≥ particle size > 1 mm, 22 kg for 1 mm ≥ particle size > 0.088 mm, 14 kg for particle size ≤ 0.088 mm; MgO 10kg of high-purity magnesia with content ≥ 95%, composition: 7Kg for 1mm ≥ particle size > 0.088mm, 3Kg for particle size ≤ 0.088mm; 4kg of Guangxi white clay; 3kg of silica powder; 5kg of alumina powder.

[0033] Preparation Process:

[0034] Weigh the above raw materials according to the formula, add them into the forced mixer and stir, first add aggregate, then add fine powder, micro powder and binder and stir for 3 to 5 minutes, and the material can be discharged after stirring evenly.

Embodiment 3

[0036] A repairing material for working lining of a ladle, the content of each component is calculated in parts by weight: Al 2 o 3 Corundum content ≥ 85% 85kg, the composition is: 5mm ≥ particle size > 3mm is 17kg, 3mm ≥ particle size > 1mm is 22Kg, 1mm ≥ particle size > 0.088mm is 24Kg, particle size ≤ 0.088mm is 22Kg; MgO content ≥95% mid-range magnesia 5kg, composition: 4Kg for 1mm≥particle size>0.088mm, 1Kg for particle size≤0.088mm; 2.5kg of Guangxi white mud; 0.5kg of carboxymethyl salt; 4kg of silica powder ; Aluminum oxide powder 3 kg.

[0037] Preparation Process:

[0038] Weigh the above raw materials according to the formula, add them into the forced mixer and stir, first add aggregate, then add fine powder, micro powder and binder and stir for 3 to 5 minutes, and the material can be discharged after stirring evenly.

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Abstract

The invention discloses a patching material for a carbonless ladle working lining, which comprises the following components in parts by weight: 75 to 85 parts of high aluminum aggregate, 5 to 15 parts of magnesia, 3 to 5 parts of adhesive and 7 to 9 parts of micro powder. The high aluminum aggregate and magnesia are used as main raw materials, a certain amount of adhesive is supplemented, and the micro powder is added to promote burning to obtain the patching material for the carbonless ladle working lining. The patching material has a good adhering property, is easy to apply and easily sintered at high temperatures, has stronger erosion resistance to molten steel and steel slag, and effectively protects the working lining. After the practice, the patching material has good effects.

Description

technical field [0001] The invention belongs to the technical field of unshaped refractory materials, and in particular relates to a repairing material for working lining of a carbon-free ladle in a steelmaking process. Background technique [0002] With the continuous improvement of users' requirements for steel quality. During the smelting process, steelworks must further control the cleanliness of molten steel, especially for low-carbon and ultra-low-carbon steels, and at the same time avoid carbon increase in the production process to the greatest extent, which puts forward more stringent requirements for steel containers for smelting . At present, many large steel mills in China have begun to use carbon-free ladle working lining, that is, using carbon-free prefabricated blocks of steel ladle as ladle lining, and its average service life is more than 200 times. [0003] Ladle carbon-free prefabricated blocks are generally made of corundum spinel. During use, due to the...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 郑吉红高永生田先明蔡仲方龚仕顺王志强蔡长秀吕衍秀
Owner WUHAN IRON & STEEL (GROUP) CORP
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