Coating material for preventing carbon deposition for coke pot lining plate and use method of coating material

A technology of smear and lining plate, applied in the field of CDQ, can solve the problems such as burning of the lining plate of CDQ coke tank, difficult infiltration and falling off of tar, etc., and achieve the effect of good dispersion effect.

Active Publication Date: 2021-06-18
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] The purpose of the present invention is to solve the problem in the technical field that the CDQ coke tank liner is easy to burn and fall off, and to provide a smear that prevents carbon deposition by coating a layer on the existing material liner , and the final molding of this coating does not require special sintering, but is sintered by itself during use. The formed coating not only makes it difficult for

Method used

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  • Coating material for preventing carbon deposition for coke pot lining plate and use method of coating material

Examples

Experimental program
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Effect test

Embodiment 1

[0043] A smear material for preventing carbon deposition for coke tank lining boards, its raw material composition and weight percentage: mullite aggregate with a particle size of 3-1mm: 24%, silicon carbide with a particle size of 3-1mm: 5%, particle size Mullite aggregate ≤1mm: 11%, andalusite with particle size ≤0.1mm: 7%, mullite with particle size ≤0.045mm: 26%, silicon carbide with particle size ≤0.045mm: 12%, particle size ≤0.045mm Boron nitride: 0.6%, metal silicon powder with a particle size of ≤0.045mm: 3%, water-soluble silicone resin solution: 2%, glass-ceramic powder with a particle size of ≤0.045mm: 4%, silicon oxide content of 32% Silica sol: 5%, Polymeric sodium acrylate: 0.4%.

[0044] The composition and weight percentage of the glass-ceramic powder with particle size ≤ 0.045mm is B 2 o 3 : 10%; SiO 2 : 65%; Al 2 o 3 : 8%; Na 2 O: 12%; K 2 O: 5%; its melting point is 908°C; it can be prepared according to conventional methods.

[0045] A method for us...

Embodiment 2

[0057] A smear material for preventing carbon deposition for coke tank lining boards, its raw material composition and weight percentage: mullite aggregate with a particle size of 3-1mm: 20%, silicon carbide with a particle size of 3-1mm: 9%, particle size Mullite aggregate ≤1mm: 10%, andalusite with particle size ≤0.1mm: 5%, mullite with particle size ≤0.045mm: 28.4%, silicon carbide with particle size ≤0.045mm: 10%, particle size ≤0.045mm Boron nitride: 2%, metal silicon powder with a particle size of ≤0.045mm: 1%, water-soluble silicone resin solution: 4%, glass-ceramic powder with a particle size of ≤0.045mm: 3%, silicon oxide content of 36% Silica sol: 7%, Polymeric sodium acrylate: 0.6%.

[0058] The composition and weight percentage of the glass-ceramic powder with particle size ≤ 0.045mm is B 2 o 3 : 9.5%; SiO 2 : 61%; Al 2 o 3 : 14%; Na 2 O: 11%; K 2 O: 4.5%; its melting point is 1050°C. It is melted according to the composition of oxides, cooled, and ground t...

Embodiment 3

[0071] A smear material for preventing carbon deposition for coke tank liners, its raw material composition and weight percentage: mullite aggregate with a particle size of 3-1mm: 25%, silicon carbide with a particle size of 3-1mm: 6%, particle size Mullite aggregate ≤1mm: 6%, andalusite with particle size ≤0.1mm: 8%, mullite with particle size ≤0.045mm: 25.5%, silicon carbide with particle size ≤0.045mm: 5.5%, particle size ≤0.045mm Boron nitride: 3%, metal silicon powder with a particle size of ≤0.045mm: 4%, water-soluble silicone resin solution: 1.1%, glass-ceramic powder with a particle size of ≤0.045mm: 7%, silicon oxide content of 38% Silica sol: 8.8%, Polymeric sodium acrylate: 0.1%.

[0072] The composition and weight percentage of the glass-ceramic powder with particle size ≤ 0.045mm is B 2 o 3 : 12.5%; SiO 2 : 62%; Al 2 o 3 : 10%; Na 2 O: 13%; K 2 O: 2.5%; its melting point is 1020°C; it can be prepared according to conventional methods.

[0073] A method for...

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Abstract

The invention relates to a coating material for preventing carbon deposition for a coke tank lining plate. The coating material comprises the following raw materials in percentage by weight: 20-30% of mullite aggregate, 5-15% of silicon carbide, 5-12% of mullite micro-powder aggregate, 5-10% of andalusite, 25-35% of mullite, 5-15% of silicon carbide, 0.1-5% of boron nitride, 1-5% of metal silicon powder, 1-8% of organic silicone resin solution, 3-8% of microcrystalline glass powder, 5-15% of silica sol with a silicon oxide content of 32-40%, and 0.01-1% of sodium polyacrylate. The use method comprises the following steps of: arranging a stainless steel wire mesh after anchoring nails are nailed at a to-be-smeared coke pot lining plate part; welding the stainless steel wire mesh to the anchoring nails in parallel; coating the stainless steel wire mesh with the coating material until the stainless steel wire mesh is completely coated; collecting pulp by using plastic fiber cloth; naturally air-drying; heating; preserving heat; and keeping for later use. The service lifetime of the coke pot lining plate can be prolonged from 3-6 months to at least 7 months by the coating material, and the temperature of the outer surface of the coke pot shell is reduced by 150-300 DEG C.

Description

technical field [0001] The invention relates to the technical field of coke dry quenching in the coking industry, in particular to a coating material for preventing carbon deposition and a construction method for a coke tank lining, which is particularly suitable for partial repair of the coke tank lining. Background technique [0002] Compared with wet coke quenching, dry coke quenching technology (CDQ) has obvious advantages. It can recover the sensible heat of red coke, improve coke strength, and at the same time facilitate the ironmaking operation of blast furnace and reduce the coke ratio. The CDQ equipment has a long service life. If the CDQ production capacity of the enterprise is not sufficient, it will have an impact on the ironmaking production when the production needs to be shut down for maintenance, and even the normal production of the ironmaking cannot be guaranteed. [0003] Due to the continuous operation of the coke CDQ system, the coke tanks that are requi...

Claims

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Application Information

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IPC IPC(8): C04B35/66C10B39/02
CPCC04B35/66C10B39/02C04B2235/3463C04B2235/3826C04B2235/386C04B2235/428C04B2235/36C04B2235/3418
Inventor 徐国涛盛军波涂红兵冯强王大春刘黎
Owner 武汉钢铁有限公司
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