CN102992760A - High-temperature ceramic coating and preparation method thereof - Google Patents
High-temperature ceramic coating and preparation method thereof Download PDFInfo
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- CN102992760A CN102992760A CN 201210483055 CN201210483055A CN102992760A CN 102992760 A CN102992760 A CN 102992760A CN 201210483055 CN201210483055 CN 201210483055 CN 201210483055 A CN201210483055 A CN 201210483055A CN 102992760 A CN102992760 A CN 102992760A
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Abstract
The invention discloses a high-temperature ceramic coating and a preparation method thereof. The method comprises the step of fully mixing the weighed granules, powder and adhesives according to a ratio to obtain a paste coating. During construction, the coating only needs to be used for easily worn equipment and pipelines, boiler burners, cyclones, a dissolving tank of a power frequency electric induction furnace, a cyclone separator of a catalytic cracking device and the like, good antioxidant, erosion-resistant, wear-resistant protection and repair effects can be generated, and the high-temperature ceramic coating can be applied to the fields of metallurgy, mines, cement, power, oil and chemical industry. The coating has the characteristics of strong cohesive property, high peel strength, large adaptive temperature difference (can be used at the temperature of 100-150 DEG C), high oxidation resistance, high erosion resistance and high wear resistance; the construction is convenient, and the labor intensity of workers and the construction conditions are reduced; the service cycle is 3-5 years, the consumption is greatly reduced, and harmful gases are not generated in the using process. Even if in the later using period, crack, smoke leakage, fire leakage and other phenomena are avoided, and safe production is guaranteed.
Description
Technical field
The present invention relates to a kind of for the equipment such as metallurgy, mine, cement, electric power, oil, chemical industry and pipeline easily by the medium of production run wash away, wearing and tearing, attack sites and parts, a kind of ceramic coating with high strength, antistripping, anti abrasive reparation, supercoat is provided.
Background technology
In existing technology; the pipeline that is used for cement building material, thermal power generation, metallurgical mine, petrochemical complex; particularly the positions such as cyclone cylinder of the fuel nozzle of boiler, cyclone furnace owing to high temperature impact, corrosion cause heavy wear, are the easily worn parts that need to often repair and protect.In the prior art, the moldable ramming lining of the multiplex phosphoric acid salt silicon carbide of ordinary method is repaired and is protected, and the method must can be implemented operation through strict baking, and the general user can't satisfy the condition of implementing this process operation.Cause thus wearing and tearing and the performance of equipment significantly to descend, the work-ing life of reduction equipment and pipeline, even cause equipment failure; cause the serious consequence of shutting down, stopping production because of maintenance; reduced the utilization ratio of equipment, caused production cost to rise, environmental pollution is serious.
Summary of the invention
The object of the invention is to be in the equipment such as metallurgy, mine, cement, electric power, oil, chemical industry and the pipeline easily by the medium of production run wash away, wearing and tearing, attack sites and parts; a kind of high-temp. ceramic paint with high strength, antistripping, anti abrasive reparation, supercoat is provided; to improve the utilization ratio of equipment; play environmental protection, energy-conservation purpose, overcome the defective and the deficiency that exist in the prior art.
The present invention has adopted such technical scheme: the starting material of described high-temp. ceramic paint comprise particulate material, powder, binding agent, it is characterized in that: the particulate material that proportionally takes by weighing, powder, binding agent are fully mixed the paste coating of acquisition;
Specification and the weight part of described particulate material are respectively:
White alundum powder---specification 0.01-0.425mm---components by weight percent 1-2 part;
White alundum powder---specification 0.426-0.633mm---components by weight percent 3-5 part;
White alundum powder---specification 0.634-0.85mm---components by weight percent 4-6 part;
Carborundum powder---specification 0.25-3mm---components by weight percent 5-15 part;
Specification and the weight part of described powder are respectively:
15 parts of zirconia powder---specification 1-3mm---components by weight percent;
Kaolin powder---0.25-3mm---components by weight percent 0.01-0.03 part;
Lanthanum trioxide 325#---components by weight percent 0.04-0.02 part;
Graphite Powder 99---components by weight percent 1-2 part;
Barium sulfate 325#---components by weight percent 5-7 part;
Titanium dioxide---180 order---components by weight percent 5-6 part;
Described binding agent is aluminum phosphate solution---components by weight percent 20-30 part.
The consumption of ceramic coating starting material of the present invention and weight part, specification (specification refers to the granularity of each raw material) grope to sum up to draw through the contriver in a large number, and each component consumption and specification all have comparatively desirable effect in above-mentioned scope.
The physical and chemical index of each raw material and effect among the present invention:
White fused alumina is take the commercial alumina powder as raw material, cools off behind the above high melt of 2000 degree in electric arc and makes, and through pulverizing shaping, the magnetic separation de-iron is sieved into multiple granularity, and its quality is fine and close, hardness is high, and particle shape becomes tip-angled shape; Be applicable to make pottery, resin bonded grinding tool and grinding, polishing, sandblast, precision casting (the special-purpose corundum of smart casting) etc., also can be used for making high grade refractory.
Silicon carbide is SILICA FUME, can the intergranular hole of filling concrete, simultaneously and hydrated product generate gelinite, generate gelinite with the reaction of basic material magnesium oxide.In concrete, mortar and the refractory material casting material of cement based, mix an amount of silicon ash, can function as follows: 1, significantly improve resistance to compression, anti-folding, impervious, anticorrosion, shock resistance and wear resisting property.2, have water conservation, prevent from emanating, bleeding, significantly reduce the effect of concrete pumping resistance.3, the work-ing life of significant prolongation concrete.Particularly pollute under the severe environment such as erosion, sulphate attack, high humidity at villaumite, the weather resistance of concrete is doubled even several times.4, decrease sprays the ash that lands of concrete and mould material, improves the single jetting thickness.5, be the necessary composition of High Strength Concrete, the engineering of existing C150 concrete is used.6, the effect that has about 5 times of cement is used in ordinary concrete and low cement deposit material and can be reduced cost. improve weather resistance.7, effectively prevent the concrete alkali-aggregate reaction.8, improve the compactness of casting type refractory materials.With Al2O3 and when depositing, easier generation mullite phase makes its hot strength, and the enhancing of shaking property of heat resistanceheat resistant occupies an important position in this present invention.
Zirconia powder, i.e. the symbiosis such as the many and ilmenite of zircon sand (zircon), rutile, monazite, xenotime obtain after the ore-dressing technique sortings such as wet concentration, electric separation, magnetic separation in the sand of beach.Its theory consists of: ZrO2:67.1%; SiO2:32.9%.Pure zircon sand is water white crystal, often because the place of production is different, impure kind and different amts dyed Huang, orange, red, brown isochrome, and hardness 7.8, proportion 4.6-4.71, specific refractory power 1.93-2.01, fusing point are 2550 ℃.Zircon is used for refractory materials and (claims zirconia refractory, such as zircon corundum brick, zirconium matter refractory fibre), casting industry casting mold sand (precision casting molding sand), accurate enamel utensil also is used for the production of glass, metal (zirconium sponge) and zirconium compounds (zirconium dioxide, basic zirconium chloride, sodium zirconate, potassium fluozirconate, zirconium sulfate etc.) in addition.Take zircon (ZrO2SiO2) as main component, contain the refractory product of ZrO2 about 65%.The good thermal shock stability of brick has good chemical stability, wear resistance and alkali resistance scouring, is mainly used in steel teeming ladle, continuous casting tundish and glass melter etc.
Lanthanum trioxide mixes agent and X ray luminous material lanthanum oxybromide powder etc. for the manufacture of ceramic condenser, piezoelectric ceramics.Get by monazite sand extraction or by calcination Phosbloc or lanthanum nitrate.Also can be made by the oxalate thermal degradation of lanthanum.As the catalyzer of multiple reaction, the oxidizing reaction of catalysis carbon monoxide during such as the doping Cadmium oxide, the catalysis co hydrogenation generates the reaction of methane during the doping palladium.The lanthanum trioxide that is impregnated into Lithium Oxide 98min or zirconium white (1%) can be used for making ferrimagnet.It is the very effective catalysts selective that methane oxidation coupling generates ethane and ethene.
Graphite (C)
Graphite is one of carbon element crystal formation.Natural graphite can be divided into two kinds of scale graphite and microcrystalline blocky graphites (amorphous graphite) by the state of its output.Natural graphite is the hexagonal plate crystal, and amorphous graphite also is small crystallization.
Graphite has the higher high-temperature behavior of decolorizing carbon, be not melted in 2100 ℃ and do not produce plastic flow once, volatilization in the time of 3704 ℃, be not fused to acid-base salt solution yet, easily oxidizing fire falls under oxidizing atmosphere and high temperature, but oxidation rate and its crystalline structure of oxidation starting temperature higher (starting from 600 ℃) graphite, granularity and ash content relation are larger, are easy to oxidation when ash oontent is high.This is that ash content forms the event of protective membrane at its particle surface when at high temperature burning owing to graphite.
The thermal conductivity of graphite is very high, and 1000 ℃ is the good conductor of heat and electricity for 63.8w/m ℃.Because the laminate structure of graphite presents significantly its many character, each side's bit parallel in the thermal conductivity ratio of stratiform direction perpendicular to the layer state direction greatly.And bonding force between layers is very weak, should not be used as separately refractory materials.The thermal expansivity of graphite is very low 25 ℃～1600 ℃ of intervals, on average only have 3.34 * 10
-6/ the quality of ℃ graphite is usually from fixed carbon, volatile matter, and the indexs such as the percent content of ash content and granularity are weighed.Ash oontent too much can stain metal, reduces the refractoriness of goods, thermal conductivity and chemical stability etc.The large plasticity that can increase blank of the phosphorus sheet of graphite impels base substrate tightr and nonflammable.
Barium sulfate can be used as raw material or the weighting agent of paint, printing ink, plastics, rubber and store battery, the surface coated agent of photographic pape and art paper, the sizing agent that textile industry is used.Glasswork can play froth breaking and increase gloss as finings.Can be used as the protection walls material that anti-radioactive rays are used.Also be used for the industries such as pottery, enamel, spices and pigment.
Titanium dioxide, bright in luster with the coating that titanium dioxide is made, opacifying power is high; strong coloring force, low-consuming, wide in variety, can play a protective role to the stability of medium; and can strengthen physical strength and the sticking power of paint film, and prevent crackle, prevent that ultraviolet ray and moisture from seeing through, the prolongation paint film life-span.
Aluminum phosphate solution and preparation method: first the diluting water that weighs up is in advance put into acid-resistant container, then slowly pour the phosphoric acid of weighing in advance into, with not stirring with the stirring rod of acid-respons, phosphoric acid and water are mixed, add immediately aluminium hydroxide in batches, stir while adding, until aluminium hydroxide dissolves fully, can use the aluminum phosphate solution mol ratio for preparing to be＞2.2-3.0 after the cooling; Moisture content is less than 60%.
The using method of high-temp. ceramic paint of the present invention: 1. pair parts of constructing carry out scrubbing, oil removal treatment; 2. anchoring piece has been tied in weldering; 3. make at the construction field (site) the ceramic coating that meets construction requirement; 4. the ceramic coating that meets construction requirement is pressed in the anchoring piece, once presses completely to be as the criterion, coat-thickness is with anchoring piece length be as the criterion (being generally 25mm); 5. can drop in 72 hours after construction is finished and carry out.
High temperature wear resistant ceramic coating of the present invention fully mixes the particulate material that proportionally takes by weighing, powder, binding agent, the paste coating of acquisition.Need only during construction this coating is used for equipment and pipeline easy to wear; boiler burner; the fluid bowl of cyclone cylinder, line frequency furnace, the positions such as cyclonic separator of catalytic cracking unit; can produce good anti-oxidant, Anti-erosion, wear-resistant protection and repairing effect, in fields such as metallurgy, mine, cement, electric power, oil, chemical industry the field of employment be arranged all.The characteristics of this coating are: cohesiveness is strong, and peel resistant strength is large, adapts to that the temperature difference large (300 ℃-450 ℃ all can be used) is anti-oxidant, Anti-erosion, wear resistance be good; Easy construction reduces labor strength and execution conditions; Life cycle reaches 3-5, decrease consumption, and do not produce obnoxious flavour in the use procedure.Even using the later stage, can not produce crack leakage cigarette yet and leak fiery phenomenon, to guarantee safety in production.
Embodiment
Described high-temp. ceramic paint, its starting material comprise particulate material, powder, binding agent, it is characterized in that: the particulate material that proportionally takes by weighing, powder, binding agent are fully mixed the paste coating of acquisition.
The preparation method of high-temp. ceramic paint of the present invention is following steps:
The particulate material that step 1), will take by weighing is by weight poured forced action type mixed grind stirrer into and is fully mixed evenly acquisition composite grain material;
Step 2), in step 1) in the composite grain material that obtains, add the binding agent aluminum phosphate solution that accounts for components by weight percent 6%-8%, continue to stir, fully mix, obtain particulate material binding agent compound;
Step 3), in step 2) in the particulate material binding agent compound that obtains, add the powder that takes by weighing by weight, continue to stir, fully mix, obtain the materials for the treatment of of ceramic coating;
Step 4), step 3) ceramic coating that obtains treats that materials carried out the closed environment ageing mixture more than 24 hours, obtain the standby material of ceramic coating, this ceramic coating standby material adds remaining aluminum phosphate solution when construction operation, continues to stir, fully mix, until meet till the construction requirement.
Claims (2)
1. high-temp. ceramic paint, its starting material comprise particulate material, powder, binding agent, it is characterized in that: the particulate material that proportionally takes by weighing, powder, binding agent are fully mixed the paste coating of acquisition;
Specification and the weight part of described particulate material are respectively:
White alundum powder---specification 0.01-0.425mm---components by weight percent 1-2 part;
White alundum powder---specification 0.426-0.633mm---components by weight percent 3-5 part;
White alundum powder---specification 0.634-0.85mm---components by weight percent 4-6 part;
Carborundum powder---specification 0.25-3mm---components by weight percent 5-15 part;
Specification and the weight part of described powder are respectively:
15 parts of zirconia powder---specification 1-3mm---components by weight percent;
Kaolin powder---0.25-3mm---components by weight percent 0.01-0.03 part;
Lanthanum trioxide 325#---components by weight percent 0.04-0.02 part;
Graphite Powder 99---components by weight percent 1-2 part;
Barium sulfate 325#---components by weight percent 5-7 part;
Titanium dioxide---180 order---components by weight percent 5-6 part;
Described binding agent is aluminum phosphate solution---components by weight percent 20-30 part.
2. according to the described high-temp. ceramic paint of claim 1, it is characterized in that:
Its preparation method is following steps:
The particulate material that step 1), will take by weighing is by weight poured forced action type mixed grind stirrer into and is fully mixed evenly acquisition composite grain material;
Step 2), in step 1) in the composite grain material that obtains, add the binding agent aluminum phosphate solution that accounts for components by weight percent 6%-8%, continue to stir, fully mix, obtain particulate material binding agent compound;
Step 3), in step 2) in the particulate material binding agent compound that obtains, add the powder that takes by weighing by weight, continue to stir, fully mix, obtain the materials for the treatment of of ceramic coating;
Step 4), step 3) ceramic coating that obtains treats that materials carried out the closed environment ageing mixture more than 24 hours, obtain the standby material of ceramic coating, this ceramic coating standby material adds remaining aluminum phosphate solution when construction operation, continues to stir, fully mix, until meet till the construction requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210483055 CN102992760A (en) | 2012-11-13 | 2012-11-13 | High-temperature ceramic coating and preparation method thereof |
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| CN 201210483055 CN102992760A (en) | 2012-11-13 | 2012-11-13 | High-temperature ceramic coating and preparation method thereof |
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| CN102992760A true CN102992760A (en) | 2013-03-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107244900A (en) * | 2017-05-23 | 2017-10-13 | 昆明理工大学 | A kind of copper anode casting die repairing material and its application |
| CN111763091A (en) * | 2020-06-17 | 2020-10-13 | 林国强 | High-thermal-shock wear-resistant coating and preparation method thereof |
-
2012
- 2012-11-13 CN CN 201210483055 patent/CN102992760A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107244900A (en) * | 2017-05-23 | 2017-10-13 | 昆明理工大学 | A kind of copper anode casting die repairing material and its application |
| CN111763091A (en) * | 2020-06-17 | 2020-10-13 | 林国强 | High-thermal-shock wear-resistant coating and preparation method thereof |
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Application publication date: 20130327 |