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Fire facing brick for gasifier and preparation method thereof

A technology for fire-faced bricks and gasifiers, which is used in the manufacture of combustible gases, petroleum industry, etc., can solve the problems of reduced life, good slag fluidity, material damage, etc., so as to extend service life, improve corrosion resistance, and improve heat The effect of shock stability

Active Publication Date: 2022-07-12
洛阳利尔功能材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If a certain link is not properly controlled, the temperature in the furnace will fluctuate greatly, especially the gasification temperature is much higher than the melting point of the coal slurry, which will lead to too good fluidity of the slag, and it will be difficult to adhere and solidify to the surface of the fire brick to form a protective layer or protective layer. If the layer is too thin, it will lose the protection against the fire facing bricks, causing the material to be damaged too quickly and the service life to be reduced

Method used

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  • Fire facing brick for gasifier and preparation method thereof

Examples

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preparation example Construction

[0050] A preparation method of fire facing bricks for gasifier, the specific operation steps are as follows:

[0051] (1) Ingredients: according to the formula requirements, weigh the raw materials of the brick body and the sticky slag layer according to the proportions;

[0052] (2) Pre-mixing: mix the fine powder of the weighed fire-facing brick body. Raw materials: chrome oxide material of ≤0.061mm, -Al of 3~5μm 2 O 3 Micropowder, 2~3μm chromium oxide material, 2~3μm zirconia material are added to the drum ball mill for pre-mixing, the mixing time is 60min, and the mixture is ready for use;

[0053] Then, weighed raw materials of fine powder for the sticky slag layer: alumina material of ≤0.044mm, alumina material of 2~3μm, fused chromium oxide material of ≤0.061mm, chrome green of 2~3μm, oxidation of ≤0.5μm Titanium is added to the drum ball mill for pre-mixing, the mixing time is 60min, and it is ready for use;

[0054] (3) Mixing:

[0055] Mix the granular materials ...

Embodiment

[0062]

[0063] In the above table, the preparation method of the fire-facing brick for each specific embodiment gasifier is:

[0064] (1) Ingredients: according to the requirements of the formula, weigh the raw materials of the brick body and the sticky slag layer according to the proportions;

[0065] (2) Pre-mixing: First, the fine powder, chrome green, α-Al and ≤0.061mm that are weighed into the fire-faced brick body 2 O 3 The micropowder and zirconia are added to the drum ball mill for pre-mixing, the mixing time is 60min, and the mixture is ready for use; then the slag layer is weighed with corundum fine powder ≤0.044mm, α-Al 2 O 3 Micropowder, fused chromium oxide, chrome green and titanium oxide of ≤0.061mm are added to the drum ball mill for pre-mixing, the mixing time is 60min, and the mixture is ready for use;

[0066] (3) Mixing: Mix the raw materials of the fire-faced brick body and the sticky slag layer respectively, first mix the particles larger than 0mm ...

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Abstract

A fire facing brick for a gasifier and a preparation method thereof relate to a fire facing brick for a gasifier, comprising a fire facing brick body and a slag slag layer arranged on the hot surface of the fire facing brick body, the fire facing brick body. Each component contains by mass percentage: 85~95% of chromium oxide material with particle size of 5-0mm, ≤0.061mm and 2~3μm; α-Al of 3~5μm 2 O 3 Micropowder: 3~9%; 2~3μm zirconia: 2~7%; additional binder: 1~3%; the components of the sticky slag layer include by mass percentage: particle size of 5‑0mm, ≤0.044mm, 65~80% of alumina material of 2~3μm; 10~20% of zirconium-containing chromium oxide material with particle size of 3‑0mm; 5~12% of fused chromium oxide material with particle size of ≤0.061mm; chrome green: 1~5 %; Titanium oxide: 1~5%; Addition of binder: 1~3%; The fire-resistant brick is obtained through the steps of batching, pre-mixing, mixing, feeding, molding, drying and firing. Set up a sticky slag layer to resist slag with slag, effectively prolonging the service life of the fire facing bricks.

Description

technical field [0001] The invention relates to a fire facing brick for a gasifier, in particular to a fire facing brick for a gasifier and a preparation method thereof. Background technique [0002] As is well known, at present, the exterior of the CWS pressurized gasifier is a steel shell, and the interior adopts a multi-layer refractory lining body. Among them, the working lining is a high-chromium brick, that is, a fire-facing brick, and its damage mechanism can be attributed to chemical erosion, thermal stress and mechanical erosion. In the early stages of material life, its resistance to coal slag erosion is particularly important. Studies have shown that the main component of coal slag is 30~60wt% SiO 2 , 10~25% CaO, 10~20% Al 2 O 3 and 4~15% Fe 2 O 3 . Among them, SiO 2 , CaO easily penetrates into the thermal surface of the refractory brick, and their combined action leads to the thermal shock resistance of ZrO in the refractory brick matrix. 2 At the same ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/12C04B35/66C04B35/105C04B35/106C04B35/622C10J3/00
CPCC04B35/12C04B35/66C04B35/105C04B35/106C04B35/622C10J3/00C04B2235/3244C04B2235/3217C04B2235/3232C04B2235/5427C04B2235/5436C04B2235/656C04B2235/6567C04B2235/658C04B2235/9607C04B2235/9669
Inventor 高耸张宇翠崔庆阳赵继增杨付乾张亚栋侯耀仲毛晓刚赵保群
Owner 洛阳利尔功能材料有限公司