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: 2013-04-17
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
  • High-temperature wear-resistant repairing coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1, high temperature wear-resistant repair paint, is made up of the first material of 70 parts of weight and the second material of 30 parts of weight, wherein:

[0017] The weight percentage of each component of material A is:

[0018]

[0019]

[0020] 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-zirconium sand is 90%, titanic acid Titanium dioxide (TiO 2 ) content is 40%.

[0021] The weight percent of each component of second material is:

[0022]

[0023] Among them: the concentration of phosphoric acid is 85%; the fineness of aluminum chloride is 0.008-0.05mm, and the middle temperature sintering agent is silicate.

[0024] During manufacture, the components of material A are uniformly mixed according to the proportion and packed in bags, and the components of material B are uniformly mixed accordin...

Embodiment 2

[0025] 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:

[0026] The weight percentage of each component of material A is:

[0027]

[0028] 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-zirconium sand is 90%, titanic acid Titanium dioxide (TiO 2 ) content is 40%.

[0029] The weight percent of each component of second material is:

[0030]

[0031] Among them: the concentration of phosphoric acid is 85% phosphoric acid; the fineness of aluminum chloride is 0.008-0.05mm, and the middle temperature sintering agent is boric acid.

[0032] During manufacture, the components of material A are uniformly mixed according to the proportion and packed in bags, and the components of material B are uniformly mixed ac...

Embodiment 3

[0033] 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:

[0034] The weight percentage of each component of material A is:

[0035]

[0036] 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-zirconium sand is 90%, titanic acid Titanium dioxide (TiO 2 ) content is 40%.

[0037] The weight percent of each component of second material is:

[0038]

[0039]

[0040] Among them: phosphoric acid with a concentration of 85% phosphoric acid; the fineness of aluminum chloride is 0.008-0.05mm, and the medium temperature sintering agent is nickel oxide.

[0041] During manufacture, the components of material A are uniformly mixed according to the proportion and packed in bags; the components of material B are uniforml...

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Abstract

A high temperature abrasion resistant repairing paint and the preparing method thereof are provided. The high temperature abrasion resistant repairing paint consists of material (A) and material (B) at weight part ratio of 70-85:30-15. The material (A) consists of zirconium corundum fine powder, cyanite, aluminum titanate, silicon micropowder, magnesia zirconia, alumina micropowder, pure calcium aluminate cement, trimeric sodium phosphate, electrofused calcium chromate and gahnite. The material (B) consists of phosphoric acid, ink grade aluminum hydroxide, aluminum chloride, yttrium-stabilized zirconia, borax and middle-temperature sintering agent. The repairing paint has excellent abrasion resistance, corrosion resistance, crushing resistance, thermal shock resistance and good cohesive property. The operating cycle of circulating fluidized bed boiler can be increased from 3500 hours to more than 18000 hours accumulatively by using the repairing paint.

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