High-temperature wear-resistant repairing coating and preparation method thereof

A high-temperature wear-resistant and coating technology, applied in the field of refractory materials, can solve the problems of low flexural strength, consumption of manpower and financial resources, and short service life, and achieve the effect of saving manpower and material resources, improving production efficiency, and high compressive strength

Active Publication Date: 2011-07-27
YIXING GUOQIANG FURNACE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the refractory materials commonly used in circulating fluidized bed boilers currently use high-alumina clinker or white corundum as raw materials, with high cement content, and their wear resistance, erosion resistance, erosion resistance and thermal shock stability cannot meet the requirements of cycle Fluidized bed boiler technology requirements, short service life, need frequent repair or replacement, affect the normal operation of circulating fluidized bed boiler, consume a lot of manpower and financial resources
[0003] The Chinese patent 200810243011.7 previously applied by the inventor discloses a high-temperature wear-resistant coating. The material has been significantly improved, but the flexural strength is lower than that of the white corundum wear-resistant casting material, so the service life is short when repairing the damaged parts of wear-resistant bricks and wear-resistant casting. The existing technology has defects and needs to be improved.

Method used

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  • High-temperature wear-resistant repairing coating and preparation method thereof
  • High-temperature wear-resistant repairing coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1, high temperature wear-resistant repair coating, is made up of the first material of 70 parts of weight and the second material of 30 parts of weight, wherein:

[0035] The weight percentage of each component of material A is:

[0036] Zirconium corundum fine powder particle size 1 ~ 3mm 15%

[0037] Zirconium corundum fine powder particle size 0.4 ~ 1mm 35%

[0038] Zirconium corundum fine powder particle size 0.065 ~ 0.088mm 17%

[0039] Kyanite 16%

[0040] Aluminum titanate 3.5%

[0041] Silica powder Si≥98% 3%

[0042] Alumina fine powder 4%

[0043] Magnesium zircon sand 2%

[0044] Pure calcium aluminate cement 3%

[0045] Sodium tripolyphosphate 0.5%

[0046] Fused calcium chromate 0.5%

[0047] ZnAl Spinel 0.5%

[0048] Among them: the fineness of kyanite is 180 mesh to 220 (sieved); the silicon powder is Elkem silicon powder with silicon content Si≥98%, the content of magnesium oxide (MgO) in magnesia-zirconium sand is 90%, and the content...

Embodiment 2

[0058] Embodiment 2, high temperature wear-resistant repair paint, is made up of the first material of 80 parts by weight and the second material of 20 parts by weight, wherein:

[0059] The weight percentage of each component of material A is:

[0060] Zirconium corundum fine powder particle size 1 ~ 3mm 16%

[0061] Zirconium corundum fine powder particle size 0.4 ~ 1mm 26%

[0062] Zirconium corundum fine powder particle size 0.065 ~ 0.088mm 13%

[0063] Kyanite 9%

[0064] Aluminum titanate 8%

[0065] Microsilica 7%

[0066] Magnesium zircon sand 4%

[0067] Alumina fine powder 8%

[0068] Pure calcium aluminate cement 5.5%

[0069] Sodium tripolyphosphate 0.3%

[0070] Fused calcium chromate 1.2%

[0071] Spinel 2%;

[0072] Among them: the fineness of kyanite is 180 mesh to 220 mesh (sieved); the silicon powder is Elkem silicon powder with silicon content Si≥98%, the content of magnesium oxide (MgO) in magnesia-zircon sand is 90%, aluminum titanate Titanium d...

Embodiment 3

[0082] Embodiment 3, high temperature wear-resistant repair paint, is made up of the first material of 85 parts of weight and the second material of 15 parts of weight, wherein:

[0083] The weight percentage of each component of material A is:

[0084] Zirconium corundum fine powder particle size 1 ~ 3mm 23.5%

[0085] Zirconium corundum fine powder particle size 0.41mm 25%

[0086] Zirconium corundum fine powder Particle size 0.065~0.088mm 16%

[0087] Aquamarine 8%

[0088] Aluminum titanate 5%

[0089] Microsilica 5%

[0090] Alumina fine powder 5.4%

[0091] Magnesium zircon sand 3%

[0092] Pure calcium aluminate cement 4%

[0093] Sodium tripolyphosphate 0.1%

[0094] Fused calcium chromate 2.5%

[0095] Spinel 2.5%;

[0096] Among them: the fineness of kyanite is 180 mesh to 220 mesh (sieved); the silicon powder is Elkem silicon powder with silicon content Si≥98%, the content of magnesium oxide (MgO) in magnesia-zircon sand is 90%, aluminum titanate Titanium...

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Abstract

The invention relates to a high-temperature wear-resistant repairing coating and a preparation method thereof, and the coating comprises a material A and a material B with a weight ratio of 70-85:30-15, wherein the material A is prepared by zirconia corundum fine powder, kyanite, aluminium titanates, silicon micropowder, magnesium zircon sand, alumina micropowder, pure calcium aluminate cement, sodium tripolyphosphate, fused calcium chromate, and zinc aluminate gahnite; and the B material is prepared by phosphoric acid, ink-grade aluminium hydroxide, aluminium chloride, yttrium-stabilized zirconium, borax, and a medium-temperature agglutinant. The product has excellent wear resistance, corrosion resistance, erosion resistance, thermal shock stability, and a high caking property; using the product, the running period of a circulating fluidized bed boiler is increased from about 3500 hours to over 18000 hours for accumulating running time; the problem that the boiler liner needs to be repaired and replaced frequently is overcome; human and material resources are saved; and the production efficiency is greatly improved.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a 518 high-temperature wear-resistant repair coating, which is used as a quick repair material for repairing wear-resistant bricks and wear-resistant casting damaged parts in circulating fluidized bed boilers in thermal power plants. A method for manufacturing a high-temperature wear-resistant repair coating. Background technique [0002] The circulating fluidized bed boiler technology is currently recognized as a clean coal combustion technology. Due to the complex construction system of the circulating fluidized bed power generation boiler, the large amount of construction, the high flow rate of pulverized coal in the system pipeline, and the large flow rate, excellent performance is required for refractory materials. However, the refractory materials commonly used in circulating fluidized bed boilers currently use high-alumina clinker or white corundum as raw mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
CPCC04B2235/3409C04B2235/3206C04B2235/3201C04B35/6303C04B2235/3218C04B2235/3217C04B2235/3222B05D5/005C04B2235/3287C04B2235/3234C09D5/18C04B2235/444C04B2235/3284C04B35/106C04B2235/3463C04B2235/3208C04B2235/5481C04B2235/428C09D5/00C04B2235/3243C04B2235/447C04B2235/3248C09D1/00C04B35/62665C04B2235/5427C04B2235/5436C04B2235/3225C04B2235/3244
Inventor 林国强
Owner YIXING GUOQIANG FURNACE IND
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