CN105174927A - Anti-fouling and anti-slagging ceramic coating and preparation method - Google Patents
Anti-fouling and anti-slagging ceramic coating and preparation method Download PDFInfo
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- CN105174927A CN105174927A CN201510666902.3A CN201510666902A CN105174927A CN 105174927 A CN105174927 A CN 105174927A CN 201510666902 A CN201510666902 A CN 201510666902A CN 105174927 A CN105174927 A CN 105174927A
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Abstract
The invention discloses an anti-fouling and anti-slagging ceramic coating and a preparation method, which belong to the technical field of special coatings. The ceramic coating consists of the following components in percentage by weight: 20 to 25 percent of filler, 20 to 25 percent of adhesive and the balance of water. The filler consists of 7 to 8 percent of silicon dioxide, 5 to 6 percent of silicon nitride, 2 to 3 percent of SiBCN, 0.5 to 1 percent of magnesium oxide, 1.5 to 2 percent of zirconium carbide and 4 to 5 percent of silicon carbide. The preparation method includes the following steps: the adhesive is added with water and mixed, so that adhesive liquid is obtained, the filler is added, additive is then added into the adhesive liquid after the adhesive liquid is milled for half hour by a planetary ball mill, the adhesive liquid is then milled to 500nm to 700nm, and after filtration, the ceramic coating is packaged. The ceramic coating can be coated on the outer surfaces of heating tubes of a boiler, is sintered and cured to form a dense ceramic coating layer, and can effectively prevent the fouling and slagging of the tubes of the heating surface.
Description
Technical field
The invention belongs to special coating technical field, be specifically related to a kind of anti-Slagging ceramic coating and preparation method thereof.
Background technology
Station boiler frequent producer internal heating surface Slagging phenomenon.Boiler scaling has a strong impact on the safe and stable operation of boiler, is the major reason causing boiler non-normal shutdown; Slagging scorification also will reduce the heat-transfer capability of heating surface, reduces the heat-economy of boiler plant; Slagging scorification also can along with other deleterious aspects such as high temperature corrosions.These problems reduce service life of equipment, Boiler Economical Operation is obviously declined, brings massive losses to enterprise.
The existing anti-slagging scorification technology that stains mainly contains the appropriate design of boiler, optimization of operating parameters, use additive and fuel pre-treatment etc., but still is difficult to fundamentally solve Slagging problem.Along with the development of ceramic coating technology, ceramic coating, as a kind of new coating, can play certain corrosion-resistant, wear-resistant effect, but anti-Slagging performance at high temperature still can not meet the demands, and greatly limits its use range.
Summary of the invention
For the deficiencies in the prior art, the object of the present invention is to provide a kind of anti-Slagging ceramic coating and preparation method.The ceramic coating that anti-Slagging ceramic coating provided by the invention is formed in metallic surface, has good anti-Slagging performance.
The present invention is achieved through the following technical solutions above-mentioned purpose:
A kind of anti-Slagging ceramic coating, the component by mass percentage: filler 20 ~ 25%, binding agent 20 ~ 25%, all the other are water; Wherein filler comprises: silicon-dioxide 7 ~ 8%, silicon nitride 5 ~ 6%, Si-B-C-N 2 ~ 3%, magnesium oxide 0.5 ~ 1%, zirconium carbide 1.5 ~ 2%, silicon carbide 4 ~ 5%.
Preferably, in above-mentioned anti-Slagging ceramic coating, described binding agent is sodium silicate.Sodium silicate has higher cohesive force and good thermotolerance as binding agent.
Preferably, in above-mentioned anti-Slagging ceramic coating, described sodium silicate degree Beaume is 40.
Preferably, in above-mentioned anti-Slagging ceramic coating, also comprise dispersion agent, defoamer and rheological agent three kinds of auxiliary agents.The local defect that when auxiliary agent is mainly used to improve dispersiveness, wettability and avoid film, generation bubble causes.Wherein dispersion agent selects Yelkin TTS, and polypropylene glycol selected by defoamer, and rheological agent selects organobentonite.
Preferably, in above-mentioned anti-Slagging ceramic coating, described spreading agent lecithin mass percentage is 0.3 ~ 0.5%, and defoamer polypropylene glycol and mass percentage are 0.2 ~ 0.5%, and rheological agent organobentonite mass percentage is 0.3 ~ 0.5%.
The preparation method of above-mentioned anti-Slagging ceramic coating provided by the invention, be by mass percentage be 20 ~ 25% binding agent add water and be mixed to get binding agent liquid, add the filler that mass percentage is 20 ~ 25%, then grind after half an hour through planetary ball mill, be ground to 500 ~ 700nm again, filter encapsulation.
Also add in described binding agent liquid mass percentage be 0.3 ~ 0.5% spreading agent lecithin, mass percentage be 0.2 ~ 0.5% defoamer polypropylene glycol and mass percentage be 0.3 ~ 0.5% rheological agent organobentonite three kinds of auxiliary agents.
Compared with prior art, the present invention has following effective benefit:
Anti-Slagging ceramic coating of the present invention, due to containing ceramic hard phase, significantly improves heating surface steel tube wall performance, has high temperature resistant, anti-oxidant, the advantage such as density is low and specific inductivity is low.When this ceramic coating is coated on metal base surface, because ceramic aggregate is superfine powder, specific surface area is large, and there is higher rate of diffusion, thus add sub-micron-powder and carry out sintering curing, not only densification rate is fast and fine and close rate is high, can effectively prevent molten ash from entering coat inside, slow down the Slagging of matrix tubing largely.
In addition, this ceramic coating preparation cost is lower and preparation process simple, compares expensive and that preparation process is complicated coated material, has economy.In construction application, the technique of this ceramic coating is relatively simple, and spraying coating process cost is low, boiler self heat can be utilized ceramic coating burning, greatly reduce external energy loss, reduces spraying coating process cost.This ceramic coating also has the feature of coating good environmental protection.
Embodiment
Below the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
Embodiment 1
By mass percentage be 20% sodium silicate binding agent add water and be mixed to get binding agent liquid, add mass percentage be 0.3% spreading agent lecithin, mass percentage be 0.2% defoamer polypropylene glycol and mass percentage be 0.3% rheological agent organobentonite three kinds of auxiliary agents, add the filler that mass percentage is 20%, wherein filler comprises: silicon-dioxide 7%, silicon nitride 5%, Si-B-C-N 2%, magnesium oxide 0.5%, zirconium carbide 1.5%, silicon carbide 4%, then grind after half an hour through planetary ball mill, then be ground to 500nm, filter encapsulation.
Embodiment 2
By mass percentage be 21% sodium silicate binding agent add water and be mixed to get binding agent liquid, add mass percentage be 0.4% spreading agent lecithin, mass percentage be 0.4% defoamer polypropylene glycol and mass percentage be 0.5% rheological agent organobentonite three kinds of auxiliary agents, add the filler that mass percentage is 24%, wherein filler comprises: silicon-dioxide 7%, silicon nitride 6%, Si-B-C-N 3%, magnesium oxide 1%, zirconium carbide 2%, silicon carbide 5%, then grind after half an hour through planetary ball mill, then be ground to 600nm, filter encapsulation.
Embodiment 3
By mass percentage be 22% sodium silicate binding agent add water and be mixed to get binding agent liquid, add mass percentage be 0.4% spreading agent lecithin, mass percentage be 0.4% defoamer polypropylene glycol and mass percentage be 0.5% rheological agent organobentonite three kinds of auxiliary agents, add the filler that mass percentage is 23%, wherein filler comprises: silicon-dioxide 7%, silicon nitride 6%, Si-B-C-N 2%, magnesium oxide 1%, zirconium carbide 2%, silicon carbide 5%, then grind after half an hour through planetary ball mill, then be ground to 600nm, filter encapsulation.
Embodiment 4
By mass percentage be 25% sodium silicate binding agent add water and be mixed to get binding agent liquid, add mass percentage be 0.5% spreading agent lecithin, mass percentage be 0.5% defoamer polypropylene glycol and mass percentage be 0.5% rheological agent organobentonite three kinds of auxiliary agents, add the filler that mass percentage is 25%, wherein filler comprises: silicon-dioxide 8%, silicon nitride 6%, Si-B-C-N 3%, magnesium oxide 1%, zirconium carbide 2%, silicon carbide 5%, then grind after half an hour through planetary ball mill, then be ground to 700nm, filter encapsulation.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and modification, these improve and modification also should be considered as protection scope of the present invention.
Claims (7)
1. an anti-Slagging ceramic coating, is characterized in that, the component by mass percentage: filler 20 ~ 25%, binding agent 20 ~ 25%, all the other are water; Wherein filler comprises: silicon-dioxide 7 ~ 8%, silicon nitride 5 ~ 6%, Si-B-C-N 2 ~ 3%, magnesium oxide 0.5 ~ 1%, zirconium carbide 1.5 ~ 2%, silicon carbide 4 ~ 5%.
2. anti-Slagging ceramic coating according to claim 1, is characterized in that, described binding agent is sodium silicate.
3. anti-Slagging ceramic coating according to claim 2, is characterized in that, described sodium silicate degree Beaume is 40.
4. anti-Slagging ceramic coating according to claim 1, is characterized in that, also comprises spreading agent lecithin, defoamer polypropylene glycol and rheological agent organobentonite three kinds of auxiliary agents.
5. anti-Slagging ceramic coating according to claim 4, it is characterized in that, described spreading agent lecithin mass percentage is 0.3 ~ 0.5%, and defoamer polypropylene glycol and mass percentage are 0.2 ~ 0.5%, and rheological agent organobentonite mass percentage is 0.3 ~ 0.5%.
6. the preparation method of an anti-Slagging ceramic coating as claimed in claim 1, it is characterized in that, by mass percentage be 20 ~ 25% binding agent add water and be mixed to get binding agent liquid, add the filler that mass percentage is 20 ~ 25%, then grind after half an hour through planetary ball mill, be ground to 500 ~ 700nm again, filter encapsulation.
7. the preparation method of a kind of anti-Slagging ceramic coating according to claim 6, it is characterized in that, also add in described binding agent liquid mass percentage be 0.3 ~ 0.5% spreading agent lecithin, mass percentage be 0.2 ~ 0.5% defoamer polypropylene glycol and mass percentage be 0.3 ~ 0.5% rheological agent organobentonite three kinds of auxiliary agents.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106007678A (en) * | 2016-05-18 | 2016-10-12 | 南京可赛新新型材料有限公司 | Ceramic coating with high-temperature resistance and wear resistance and preparation method of ceramic coating |
| CN107602155A (en) * | 2017-10-12 | 2018-01-19 | 中冶建筑研究总院有限公司 | A kind of preparation and application of anti-sticking slag refractory material |
| CN108752020A (en) * | 2018-05-18 | 2018-11-06 | 宜兴市东山新型材料有限公司 | A kind of high temperature steel refractory coating and preparation method thereof, purposes |
| CN109136716A (en) * | 2018-10-16 | 2019-01-04 | 北京隆源纳欣科技有限公司 | A kind of nanometer metal ceramic composite coating and preparation method thereof |
| CN109293378A (en) * | 2018-10-16 | 2019-02-01 | 北京隆源纳欣科技有限公司 | A kind of high radiation ceramic coating and preparation method thereof |
| CN109486414A (en) * | 2018-11-22 | 2019-03-19 | 深圳陶金材料科技有限公司 | A kind of anti-coking slagging coating material and preparation method thereof for four main tubes of boiler |
| CN114853479A (en) * | 2022-05-19 | 2022-08-05 | 浙江立泰复合材料股份有限公司 | Method for preparing silicon carbide or boron carbide ceramic plate based on reaction sintering |
| CN115105949A (en) * | 2022-07-08 | 2022-09-27 | 潮州市索力德机电设备有限公司 | Method for reducing NOx emission of ceramic gas tunnel kiln |
| CN116218262A (en) * | 2023-02-15 | 2023-06-06 | 广西大学 | Preparation method of boiler water-cooled wall slag-bonding-preventing nano composite ceramic coating |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106007678A (en) * | 2016-05-18 | 2016-10-12 | 南京可赛新新型材料有限公司 | Ceramic coating with high-temperature resistance and wear resistance and preparation method of ceramic coating |
| CN106007678B (en) * | 2016-05-18 | 2019-02-01 | 南京亮而彩新材料有限公司 | A kind of high temperature wear resistant ceramic coating and preparation method thereof |
| CN107602155A (en) * | 2017-10-12 | 2018-01-19 | 中冶建筑研究总院有限公司 | A kind of preparation and application of anti-sticking slag refractory material |
| CN107602155B (en) * | 2017-10-12 | 2019-07-12 | 中冶建筑研究总院有限公司 | A kind of preparation and application of anti-sticking slag refractory material |
| CN108752020A (en) * | 2018-05-18 | 2018-11-06 | 宜兴市东山新型材料有限公司 | A kind of high temperature steel refractory coating and preparation method thereof, purposes |
| CN109136716A (en) * | 2018-10-16 | 2019-01-04 | 北京隆源纳欣科技有限公司 | A kind of nanometer metal ceramic composite coating and preparation method thereof |
| CN109293378A (en) * | 2018-10-16 | 2019-02-01 | 北京隆源纳欣科技有限公司 | A kind of high radiation ceramic coating and preparation method thereof |
| CN109486414A (en) * | 2018-11-22 | 2019-03-19 | 深圳陶金材料科技有限公司 | A kind of anti-coking slagging coating material and preparation method thereof for four main tubes of boiler |
| CN114853479A (en) * | 2022-05-19 | 2022-08-05 | 浙江立泰复合材料股份有限公司 | Method for preparing silicon carbide or boron carbide ceramic plate based on reaction sintering |
| CN115105949A (en) * | 2022-07-08 | 2022-09-27 | 潮州市索力德机电设备有限公司 | Method for reducing NOx emission of ceramic gas tunnel kiln |
| CN115105949B (en) * | 2022-07-08 | 2023-08-11 | 潮州市索力德机电设备有限公司 | Method for reducing NOx discharged by ceramic gas tunnel kiln |
| CN116218262A (en) * | 2023-02-15 | 2023-06-06 | 广西大学 | Preparation method of boiler water-cooled wall slag-bonding-preventing nano composite ceramic coating |
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Application publication date: 20151223 |