CN1305810C - High temperature anti-slag anti-coking coating - Google Patents
High temperature anti-slag anti-coking coating Download PDFInfo
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- CN1305810C CN1305810C CN 200510018805 CN200510018805A CN1305810C CN 1305810 C CN1305810 C CN 1305810C CN 200510018805 CN200510018805 CN 200510018805 CN 200510018805 A CN200510018805 A CN 200510018805A CN 1305810 C CN1305810 C CN 1305810C
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Abstract
The present invention discloses a high temperature slag and coking resistance coating which is prepared from the components of the following part by weight: 20 to 50 parts of zirconium dioxide, 14 to 20 parts of alumina, 14 to 20 parts of magnesia, 3 to 5 parts of fluorosilicate, 3 to 5 parts of metal powder, 2 to 3 parts of rare earth oxide, 30 to 50 parts of soluble silicate and 3 to 5 hexametaphosphate. The coating of the present invention has the advantages of simple construction, convenient use, good high-temperature and chemical stability, and strong ability of resisting coking, medium erosion and high temperature corrosion; the coating of the present invention can be rapidly solidified at a normal temperature, be converted into hard ceramic bodies at a high temperature, and keep a stable structure at a high temperature; besides, the coating has the advantages of strong binding capacity and thermal stability when bound with the surfaces of metal or firebricks, no crack and sloughing under the condition that hotness and coldness alternate, good high-temperature and chemical stability, and strong ability of resisting coking, medium erosion and high temperature corrosion; the prodct can be suitable for resisting coking of coal fired boilers, kilns, etc. in electric power, metallurgy, petrifaction and other industrial and mining establishments.
Description
Technical field
The present invention relates to a kind of coating, relate in particular to a kind of high temperature anti-slag anti-coking coating.
Background technology
Boiler coke mainly is to be cooled to solidify on the furnace wall by fusing of carrying secretly in the flue gas or part fused particle collision to form, easily occur on the boiler surface, as boiler water-wall tube, hyperthermia and superheating organ pipe, high temperature reheater pipe, burner hearth, burner nozzle, water shoot etc.Cinder can cause that temperature raises in the stove, and boiler tube is overheated and surpass its permission use temperature, causes booster, and use boiler safety and production in serious threat, causes a serious accident, and causes the business economic benefit seriously to descend.
The present domestic production of not seeing with anti-slag anti-coking product, the common way of enterprise is that Jiao is beaten in blowing out, with compressed air soot-blowing or replacing boiler tube, this has brought enormous economic loss to enterprise, according to incompletely statistics, surplus the existing Industrial Boiler 50 of China ten thousand, surplus the kiln 160,000, the product of anti-coking will be extremely important to the socio-economic development and the scientific-technical progress of China.
Summary of the invention
The objective of the invention is to: overcome the above-mentioned defective of prior art, it is simple, easy to operate to develop a kind of construction, with isolating coal slag coking on heating surface, and the high temperature anti-slag anti-coking coating that the boiler of easy coking can normally be moved.
The present invention realizes by following scheme: made by weight by following component: 3～5 parts of 30～50 parts of hexametaphosphates of 2～3 parts of soluble silicates of 3～5 parts of rare earth oxides of 3～5 parts of metal powders of 14～20 parts of silicofluorides of 14～20 parts of magnesium oxide of 20～50 parts of aluminium sesquioxides of zirconium dioxide.
Hexametaphosphate of the present invention is one of hexa metaphosphoric acid potassium, Sodium hexametaphosphate 99, hexa metaphosphoric acid magnesium, hexa metaphosphoric acid aluminium or two or more.Described metal powder is one of aluminium powder, zinc powder, manganese powder or two or more.Described soluble silicate is water glass and/or potassium silicate and/or lithium silicate.Described silicofluoride is potassium silicofluoride and/or Sodium Silicofluoride and/or lithium fluosilicate.Described rare earth oxide is cerium oxide and/or lanthanum trioxide.
Screening formulation of the present invention is: 25 parts of zirconium dioxides, 15 parts of aluminium sesquioxides, 5 parts in magnesium oxide, 5 parts of Sodium Silicofluorides, 5 parts of metal powders, 2 parts of cerium oxide, 40 parts of water glass, 3 parts of Sodium hexametaphosphate 99s.
The present invention adopts high pure oxide, heat resisting temperature reaches the unique formula that the zirconium dioxide more than 2000 ℃ etc. is formed for main raw material, the coating application of making is simple, and is easy to use, have excellent high-temperature and a chemical stability, extremely strong anti-coking, anti-erosion medium resistance, resistance to high temperature corrosion ability.The present invention adopts modified adhesive as wedding agent, improved coating and metal adhesivity at high temperature, the modified adhesive that this coating employing water glass and hexametaphosphate are formed is as wedding agent, not only overcome ortho-water glass and made the easy bubbling of tackiness agent, the shortcoming that cracks, and, coating compactness being improved because hexametaphosphate can also play lubricated densification, bonding strength increases.But coating of the present invention is fast setting at normal temperatures, change into hard ceramic body under the high temperature, at high temperature can keep stable structure, with metal or refractory brick surface extremely strong bonding force and thermostability are arranged, under the situation of alternating hot and cold, can not produce the cracking and come off, have excellent high-temperature and chemical stability, extremely strong anti-coking, anti-erosion medium resistance ability are arranged, and this product is applicable to anti-cokings such as electric power, metallurgy, petrochemical industry and other industrial and mining enterprises' coal firing boiler, kilns.
Embodiment
The present invention is described in detail below in conjunction with embodiment.
Embodiment 1:
Get zirconium dioxide 25kg, aluminium sesquioxide 15kg, magnesium oxide 5kg, potassium silicofluoride 5kg, zinc powder 5kg, cerium oxide 2kg, water glass 40kg, Sodium hexametaphosphate 99 3kg, with above-mentioned powder through ball milling, sieve, remix stirs, and is even with above-mentioned wet feed remix after the sampling Detection, promptly.
Know-why of the present invention is: according to the surface infiltration principle, utilize ZrO
2The physical property that-MgO matrix material slag is difficult to soak into, make burnt group as ball from the coatingsurface landing, thereby prevented that molten ash from the gathering of coatingsurface, having avoided the formation of coking, reach the purpose of anti-slag anti-coking.Product of the present invention after testing, anti-coking≤5%, wear resistance≤8g/1000r, thickness 0.8～1.2mm, hardness 〉=160HB, density 2.0～2.5g/cm
3, 20% sour 48hr weightlessness≤0.4% is soaked in use temperature≤1200 ℃, soaks 20% alkali 48hr weightlessness≤0.2%, and-900 ℃ of circulations are 5 times under the thermal shock resistance normal temperature.
Embodiment 2:
Get zirconium dioxide 45kg, aluminium sesquioxide 20kg, magnesium oxide 20kg, potassium silicofluoride 5kg, metal powder 5kg, cerium oxide 3kg, water glass 45kg, Sodium hexametaphosphate 99 5kg, make high temperature anti-slag anti-coking coating of the present invention by the method identical with embodiment 1.
Embodiment 3:
Get zirconium dioxide 25kg, aluminium sesquioxide 18kg, magnesium oxide 15kg, silicofluoride 5kg, metal powder 3kg, cerium oxide 2kg, water glass 30kg, hexametaphosphate 5kg, make high temperature anti-slag anti-coking coating of the present invention by the method identical with embodiment 1.
Embodiment 4:
Get zirconium dioxide 50kg, aluminium sesquioxide 19kg, magnesium oxide 14kg, potassium silicofluoride 2kg, Sodium Silicofluoride 2kg, zinc powder 1kg, manganese powder 2kg, aluminium powder 1kg, cerium oxide 2kg, water glass 45kg, hexa metaphosphoric acid potassium 1kg, hexa metaphosphoric acid magnesium 1kg, Sodium hexametaphosphate 99 1kg, make high temperature anti-slag anti-coking coating of the present invention by the method identical with embodiment 1.
Embodiment 5:
Get zirconium dioxide 35kg, Al 2 O 15kg, magnesium oxide 16kg, potassium silicofluoride 0.5kg, Sodium Silicofluoride 3kg, metallic aluminium powder 1.5kg, zinc powder 2.5kg, cerium oxide 2.5kg, potassium silicate 35kg, hexa metaphosphoric acid aluminium 3kg, hexa metaphosphoric acid magnesium 1kg, make high temperature anti-slag anti-coking coating of the present invention by the method identical with embodiment 1.
Embodiment 6:
Get zirconium dioxide 25kg, aluminium sesquioxide 14kg, magnesium oxide 18kg, lithium fluosilicate 4kg, manganese powder 5kg, cerium oxide 1kg, lanthanum trioxide 1kg, water glass 30kg, potassium silicate 15kg, hexa metaphosphoric acid magnesium 1kg, hexa metaphosphoric acid aluminium 3kg, make high temperature anti-slag anti-coking coating of the present invention by the method identical with embodiment 1.
Embodiment 7:
Get zirconium dioxide 35kg, aluminium sesquioxide 20kg, magnesium oxide 16kg, potassium silicofluoride 1kg, Sodium Silicofluoride 1kg, lithium fluosilicate 1kg, aluminium powder 1kg, zinc powder kg, manganese powder kg, lanthanum trioxide 3kg, water glass 35kg, hexa metaphosphoric acid magnesium 2kg, hexa metaphosphoric acid aluminium 2kg, make high temperature anti-slag anti-coking coating of the present invention by the method identical with embodiment 1.
Claims (5)
1, a kind of high temperature anti-slag anti-coking coating, it is characterized in that: make by weight: 20～50 parts of zirconium dioxides, 14～20 parts of aluminium sesquioxides, 14～20 parts in magnesium oxide, 3～5 parts of silicofluorides, 3～5 parts of metal powders, 2～3 parts of rare earth oxides, 30～50 parts of soluble silicates, 3～5 parts of hexametaphosphates by following component, metal powder is one of aluminium powder, zinc powder, manganese powder or two or more, and soluble silicate is water glass and/or potassium silicate and/or lithium silicate.
2, high temperature anti-slag anti-coking coating according to claim 1 is characterized in that: hexametaphosphate is one of hexa metaphosphoric acid potassium, Sodium hexametaphosphate 99, hexa metaphosphoric acid magnesium, hexa metaphosphoric acid aluminium or two or more.
3, high temperature anti-slag anti-coking coating according to claim 1 and 2 is characterized in that: silicofluoride is potassium silicofluoride and/or Sodium Silicofluoride and/or lithium fluosilicate.
4, high temperature anti-slag anti-coking coating according to claim 1 and 2 is characterized in that: rare earth oxide is cerium oxide and/or lanthanum trioxide.
5, a kind of high temperature anti-slag anti-coking coating, it is characterized in that: made by weight by following component: 25 parts of zirconium dioxides, 15 parts of aluminium sesquioxides, 5 parts in magnesium oxide, 5 parts of Sodium Silicofluorides, 5 parts of metal powders, 2 parts of cerium oxide, 40 parts of water glass, 3 parts of Sodium hexametaphosphate 99s, metal powder is one of aluminium powder, zinc powder, manganese powder or two or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510018805 CN1305810C (en) | 2005-05-26 | 2005-05-26 | High temperature anti-slag anti-coking coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510018805 CN1305810C (en) | 2005-05-26 | 2005-05-26 | High temperature anti-slag anti-coking coating |
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| CN1699288A CN1699288A (en) | 2005-11-23 |
| CN1305810C true CN1305810C (en) | 2007-03-21 |
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| CN 200510018805 Active CN1305810C (en) | 2005-05-26 | 2005-05-26 | High temperature anti-slag anti-coking coating |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102351553B (en) * | 2011-07-25 | 2015-04-29 | 合肥科德电力表面技术有限公司 | Water wall refractory belt anti-coking paint |
| CN103172344A (en) * | 2013-04-09 | 2013-06-26 | 江西恒大高新技术股份有限公司 | Heat-resisting compact inorganic hole sealing agent coating |
| CN105111854A (en) * | 2015-09-15 | 2015-12-02 | 江门市华材新材料科技实业有限公司 | High-temperature coking-resisting coating and preparing method thereof |
| CN106902831A (en) * | 2015-12-23 | 2017-06-30 | 通用电气公司 | The catalysis material of anti-coking, the method for protecting product slagging prevention and the product for having anti-coking coating |
| CN106905723A (en) * | 2015-12-23 | 2017-06-30 | 通用电气公司 | The coating of anti-coking, the product for having anti-coking coating and the method for preventing product coking |
| CN109467963A (en) * | 2018-11-12 | 2019-03-15 | 江西恒大工程技术有限公司 | Coal-burning boiler water-cooling wall anti-coking special coating |
| CN112209727A (en) * | 2020-09-02 | 2021-01-12 | 珠海弘德表面技术有限公司 | Ceramic coating for heating surface of power plant boiler and preparation method thereof |
| CN112280346A (en) * | 2020-10-30 | 2021-01-29 | 郑州三众能源科技有限公司 | Black body anti-coking ceramic identification coating and preparation method thereof |
| CN114164391B (en) * | 2021-09-18 | 2024-04-12 | 北京球冠科技有限公司 | High-temperature anti-coking electric arc spraying powder core wire for electric pulverized coal boiler |
| CN114196238B (en) * | 2021-12-28 | 2022-06-14 | 宜兴瑞泰耐火材料工程有限公司 | Anti-coking coating and use method thereof |
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Denomination of invention: High temperature anti-slag anti-coking coating Effective date of registration: 20160603 Granted publication date: 20070321 Pledgee: CITIC Bank Nanchang branch of Limited by Share Ltd Pledgor: Jiangxi Hengda Advanced Technology Co., Ltd. Registration number: 2016360000006 |
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Date of cancellation: 20170926 Granted publication date: 20070321 Pledgee: CITIC Bank Nanchang branch of Limited by Share Ltd Pledgor: Jiangxi Hengda Advanced Technology Co., Ltd. Registration number: 2016360000006 |