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Preparation method of dry quenching furnace chute corbel brick

A CDQ furnace and corbel technology, applied in the field of refractory materials, can solve the problems of high dependence on CDQ coke supply, huge impact on blast furnace production, and inability to meet the use requirements, achieving good temperature control effects, good molding effects, Combined Phase Stabilization Effect

Inactive Publication Date: 2017-03-15
MAANSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The currently used CDQ furnace chute corbel pillar bricks are all made of ordinary refractory materials. The preparation process is very traditional. After the CDQ furnace is generally operated for 1-2 years, due to the long-term abrasion of high-temperature coke and coke powder, The corbels are damaged or collapsed, and the furnace has to be shut down to carry out annual repairs on the corbels. The annual repair time is generally about 30 days, and the annual repair time is long; The dependence on supply is increasing, and each shutdown has a huge impact on blast furnace production, which cannot meet the requirements of modern iron and steel complexes.

Method used

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  • Preparation method of dry quenching furnace chute corbel brick
  • Preparation method of dry quenching furnace chute corbel brick
  • Preparation method of dry quenching furnace chute corbel brick

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A method for preparing a CDQ furnace chute corbel pillar brick is specifically carried out according to the following steps:

[0034] Step S1, mixing ingredients:

[0035] 1) Ingredients according to the composition (mass percentage) of corbel pillar bricks: 46% andalusite, 29% fused mullite, 5% kaolin fine powder, α-Al 2 o 3 5% fine powder, 7% high alumina bauxite, 8% platy corundum;

[0036] 2) Separately mix the granules and fine powder in the composition ingredients, put the granules into a forced planetary mixer, and then add the well-mixed fine powder and stir together to ensure that the stirring is sufficient and even;

[0037] Step S2, mixing and milling: add 3% aluminum metaphosphate composite solution to the material stirred and mixed uniformly in step S1 to carry out wet rolling, wet rolling for 5 minutes, and mix and grind evenly;

[0038] Step S3, pressing and forming: after mixing and grinding, send it to the side of the 630t friction press through the ...

Embodiment 2

[0052] A method for preparing a CDQ furnace chute corbel pillar brick is specifically carried out according to the following steps:

[0053] Step S1, mixing ingredients:

[0054] 1) Ingredients according to the composition (mass percentage) of corbel pillar bricks: 47% andalusite, 28% fused mullite, 5.5% kaolin fine powder, α-Al 2 o 3 Micro powder 4.5%, high alumina bauxite 7%, tabular corundum 8%;

[0055] 2) Separately mix the granules and fine powder in the composition ingredients, put the granules into a forced planetary mixer, and then add the well-mixed fine powder and stir together to ensure that the stirring is sufficient and even;

[0056] Step S2, mixing and milling: add 3% aluminum metaphosphate composite liquid to the material stirred and mixed uniformly in step S1, and carry out wet rolling, wet rolling for 10 minutes, and mix and grind evenly;

[0057] Step S3, pressing and forming: after mixing and grinding, send it to the side of the 630t friction press thro...

Embodiment 3

[0071] A method for preparing a CDQ furnace chute corbel pillar brick is specifically carried out according to the following steps:

[0072] Step S1, mixing ingredients:

[0073] 1) Ingredients according to the composition (mass percentage) of corbel pillar bricks: 45% andalusite, 31% fused mullite, 5% kaolin fine powder, α-Al 2 o 3 5% fine powder, 6.5% high alumina bauxite, 7.5% tabular corundum;

[0074] 2) Separately mix the granules and fine powder in the composition ingredients, put the granules into a forced planetary mixer, and then add the well-mixed fine powder and stir together to ensure that the stirring is sufficient and even;

[0075] Step S2, mixing and milling: add 3% aluminum metaphosphate composite liquid to the material stirred and mixed uniformly in step S1 to carry out wet rolling, wet rolling for 8 minutes, and mix and grind evenly;

[0076] Step S3, pressing and forming: after mixing and grinding, send it to the side of the 630t friction press through ...

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Abstract

The invention discloses a preparation method of a dry quenching furnace chute corbel brick. The method comprises the following steps: S1. uniformly mixing materials; S2. mulling; S3. compression moulding; S4. firing; and S5. inspecting and packaging. Andalusite is adopted to enhance the frame strength, thereby effectively enhancing the thermal shock resistance. High-purity electrofused mullite has the needle-shaped crystal structure, and is capable of absorbing the andalusite expansion in the transformation stage and enhancing the thermal shock and folding strength. Slaty corundum can enhance the wear resistance, and can substitute the original silicon carbide powder component to effectively enhance the oxidation resistance. The nano alpha-Al2O3 material is a high-temperature liquid phase, and the high-temperature liquid phase sintering mechanism can be enhanced and the stable crystal lattice can be produced.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a method for preparing a CDQ furnace chute corbel pillar brick. Background technique [0002] Dry coke quenching furnace (referred to as CDQ furnace) is an important device of CDQ system. The upper part of the CDQ furnace is a pre-storage room and an annular air duct surrounding the pre-storage room and communicating with the pre-storage room. The lower part is a cooling room. The structure connecting the previous and the next, its components mainly include corbels, and the corbels are the key parts. The currently used CDQ furnace chute corbel pillar bricks are all made of ordinary refractory materials. The preparation process is very traditional. After the CDQ furnace is generally operated for 1-2 years, due to the long-term abrasion of high-temperature coke and coke powder, The corbels are damaged or collapsed, and the furnace has to be shut down to c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/18C04B35/622C04B35/63
CPCC04B35/66C04B35/18C04B35/622C04B35/6306C04B35/6309C04B2235/3217C04B2235/3463C04B2235/349C04B2235/9623
Inventor 钱虎林王春洪刘府根储叶君李嘉李瑞兰齐书祥
Owner MAANSHAN IRON & STEEL CO LTD
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