A coating material for preventing carbon deposition for coke tank lining and its application method

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: 2022-03-01
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 tar to infiltrate, but also prevents the coke tank lining from sticking and scorching, and is not easy to The problem of burning and falling off can increase the service life of the coke tank lining from the current 3 to 6 months to at least 7 months, and reduce the outer surface temperature of the coke tank shell by 150-300 ° C for the coke tank lining Coating and application method for preventing carbon deposition

Method used

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  • A coating material for preventing carbon deposition for coke tank lining and its application method

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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 particle size ≤0.045mm: 1%, water-soluble silicone resin solution: 4%, glass-ceramic powder with particle size ≤0.045mm: 3%, silicon oxide content 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 to prepare a f...

Embodiment 3

[0071] 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: 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 particle size ≤0.045mm: 4%, water-soluble silicone resin solution: 1.1%, glass-ceramic powder with particle size ≤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 us...

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Abstract

A coating material for preventing carbon deposition for coke tank lining plate, its raw material composition and wt%: 20-30% of mullite aggregate, 5-15% of silicon carbide, 5-12% of mullite fine powder aggregate, Andalusite 5~10%, mullite 25~35%, silicon carbide 5~15%, boron nitride 0.1~5%, metal silicon powder 1~5%, silicone resin solution 1~8%, microcrystalline 3~8% glass powder, 5~15% silica sol with 32~40% silicon oxide, 0.01~1% sodium polyacrylate; how to use: Install anchoring nails at the lining plate of the coke tank and then set up stainless steel wire mesh ; Weld the stainless steel wire mesh on the anchoring nail in parallel; apply the smear until the stainless steel wire mesh is completely covered; use plastic fiber cloth to collect the pulp; air dry naturally; heat; keep warm; spare. The invention can increase the service period of the coke can liner from 3-6 months to at least 7 months, and reduce the outer surface temperature of the coke can shell 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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Patent Type & Authority Patents(China)
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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