Corundum mullite multiphase gradient material for heat recovery coke oven door

A gradient material, mullite technology, applied in coking oven doors/closures, coking ovens, heating of coking ovens, etc., can solve problems such as uneven wear, cumbersome process, and reduced life of kiln doors , to achieve the effects of increased room temperature flexural strength, room temperature compressive strength, and thermal shock resistance

Active Publication Date: 2020-05-15
UNIV OF SCI & TECH LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the kiln door is completely assembled by a single low-density high-alumina brick, and the use of high-alumina bricks to assemble the kiln door takes a long time and the process is cumbersome
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Method used

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  • Corundum mullite multiphase gradient material for heat recovery coke oven door
  • Corundum mullite multiphase gradient material for heat recovery coke oven door

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Premix 65kg of corundum aggregate, 5kg of high alumina cement, 5kg of silica fume, 5kg of alumina powder, and 20kg of bauxite fine powder in a mixer for 10 minutes to obtain premixed material 1; mix 65kg of burnt gemstone aggregate, 5kg of high alumina cement , 5kg of silica fume, 5kg of alumina powder, and 20kg of burnt gemstone fine powder were premixed in a blender for 10 minutes to obtain premixed material 2; premixed material 1 was mixed with 5 kg of water and continued to stir for 30 minutes to obtain castable 1; premixed Mix material 2 with 5kg water and continue to stir for 30 minutes to obtain castable 2; pour castable 1 to 1 / 3 of the mold volume by vibration casting, then pour castable 2 to fill the entire mold, and take off after 48 hours of curing. mold to obtain a complex-phase gradient material body; dry the complex-phase gradient material body at 100°C for 48 hours to obtain a dried complex-phase gradient material body; keep the dried complex-phase gradien...

Embodiment 2

[0027] Premix 63kg of corundum aggregate, 8kg of high alumina cement, 4kg of silica fume, 7kg of alumina powder, and 18kg of bauxite fine powder in a mixer for 10 minutes to obtain premixed material 1; mix 63kg of burnt gemstone aggregate, 8kg of high alumina cement , 4kg of silica fume, 7kg of alumina powder, and 18kg of burnt gemstone fine powder were premixed in a blender for 10 minutes to obtain premixed material 2; premixed material 1 was mixed with 5 kg of water and continued to stir for 30 minutes to obtain castable 1; premixed Mix material 2 with 5kg water and continue to stir for 30 minutes to obtain castable 2; pour castable 1 to 1 / 3 of the mold volume by vibration casting, then pour castable 2 to fill the entire mold, and take off after 48 hours of curing. mold to obtain a complex-phase gradient material body; dry the complex-phase gradient material body at 100°C for 48 hours to obtain a dried complex-phase gradient material body; keep the dried complex-phase gradien...

Embodiment 3

[0030] Premix 64kg of corundum aggregate, 7kg of high alumina cement, 4kg of silica fume, 7kg of alumina powder, and 18kg of bauxite fine powder in a mixer for 10 minutes to obtain premixed material 1; mix 64kg of burnt gemstone aggregate, 7kg of high alumina cement , 4kg of silica fume, 7kg of alumina powder, and 18kg of burnt gemstone fine powder were premixed in a blender for 10 minutes to obtain premixed material 2; premixed material 1 was mixed with 5 kg of water and continued to stir for 30 minutes to obtain castable 1; premixed Mix material 2 with 5kg water and continue to stir for 30 minutes to obtain castable 2; pour castable 1 to 1 / 3 of the mold volume by vibration casting, then pour castable 2 to fill the entire mold, and take off after 48 hours of curing. mold to obtain a complex-phase gradient material body; dry the complex-phase gradient material body at 100°C for 48 hours to obtain a dried complex-phase gradient material body; keep the dried complex-phase gradien...

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Abstract

The invention relates to a corundum mullite multiphase gradient material for a heat recovery coke oven door. The preparation method comprises the following steps: fully premixing corundum aggregate, flint clay aggregate, high-alumina cement, silica fume, alumina powder, fine bauxite powder and fine flint clay powder used as raw materials; adding water accounting for 5-10% of the mass of the raw materials as a binding agent, and continuing stirring; putting the mixture into a mold for vibration pouring; performing demoulding after a sample is cured in the mold; then, drying the cured castable under the condition of 100 DEG C to 150 DEG C; and finally, calcining the dried castable at a high temperature of 1500-1600 DEG C for 2-6 hours to obtain the corundum-mullite multiphase gradient material for a heat recovery coke oven door. According to the invention, the characteristics of the precast block fired by two different castables are effectively combined, so that the normal-temperature mechanical strength and thermal shock resistance stability of the material are improved while the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of kiln design, in particular to a corundum-mullite multiphase gradient material for heat recovery coke oven doors. Background technique [0002] At present, the kiln door is completely assembled by a single low-density high-alumina brick. It takes a long time to assemble the kiln door with high-alumina bricks and the process is cumbersome. For the kiln door currently used by a certain factory, due to the different wear conditions of various parts in the process of using a single low-density aluminum brick, the service life of the kiln door is reduced. Therefore, the present invention proposes a multi-phase gradient fired prefabricated block to simplify the assembly of the furnace door and prolong the service life of the furnace door. Contents of the invention [0003] The invention provides a corundum-mullite multiphase gradient material for heat recovery coke oven doors, which is composed of corundum ag...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/10C04B33/04C10B25/02
CPCC04B35/66C04B35/10C04B33/04C10B25/02C04B2235/3217C04B2235/602C04B2235/75C04B2235/96Y02P20/129
Inventor 罗旭东李季佳
Owner UNIV OF SCI & TECH LIAONING
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