CN100447207C - High-temperature-resisting coating and its production - Google Patents
High-temperature-resisting coating and its production Download PDFInfo
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- CN100447207C CN100447207C CNB200510027741XA CN200510027741A CN100447207C CN 100447207 C CN100447207 C CN 100447207C CN B200510027741X A CNB200510027741X A CN B200510027741XA CN 200510027741 A CN200510027741 A CN 200510027741A CN 100447207 C CN100447207 C CN 100447207C
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Abstract
A high-temperature-resisting coating and its production are disclosed. The coating consists of solid material and liquid material. The solid material comprises yttrium oxide, jargonia, rare-earth mixture, glass flour, sodium silicate and active clay and the liquid material consists of borax, sodium hydrate, water glass and water. It has better high-temperature-resisting, oxidation-resisting, anti-corrosive performances and excellent adhesion. It can be used for metal industrial furnace coating.
Description
Technical field
The present invention relates to a kind of coating, especially about a kind of high-temperature resistant coating that is applicable to nonferrous metal smelting furnace and preparation method thereof.
Background technology
At present, the industrial furnace of the melting non-ferrous metal that some medium and small enterprises use, the industrial furnace of melting aluminum or aluminum alloy for example, generally be to adopt the lower irony crucible of production cost, temperature of fusion up to 1200 ℃ of situations under, aluminium liquid is quite serious to the corrosion of irony crucible, and in order to prevent corrosion, the be everlasting internal surface of irony crucible of people is coated with the last layer high-temperature resistant coating.It is a kind of that commonly used is is the high-temperature resistant coating of major ingredient with the titanium oxide, but because of this coating can not satisfy erosion-resisting requirement, therefore producing running after two days, the longest runtime is also only about 10 days, owing to being corroded, crucible scraps the phenomenon of being forced to stop work with regard to occurring, this not only influences production, has also increased production cost greatly.Though there is a kind of high-temperature resistant coating (U.S. Pyrotek company produce boron nitride coating) of import that the industrial furnace of melting aluminium was run well 3 months, this import coating price costliness does not fit into the demand of medium-sized and small enterprises.Therefore this is a unresolved so far problem in melting non-ferrous metals industry stove industry, suddenly waits to seek a kind of new corrosion-resistant inexpensive again high-temperature resistant coating.
Summary of the invention
The invention provides a kind of high-temperature resistant coating and preparation method thereof.This coating be a kind of have high temperature resistant, anti-oxidant, erosion resistance, high-temperature stability and strong adhesion be applicable to the high-temperature resistant coating that melting non-ferrous metals industry stove is used.
High-temperature resistant coating of the present invention comprises solid material and two kinds of components of liquid material.Solid material component is made up of following ingredients and weight % content basically:
Composition weight % content
Yttrium oxide 10-25
Zirconium white 10-25
Lucium 10-25
Glass powder 2-4
Water glass 40-50
Atlapulgite 3-5
Liquid material component is made up of following ingredients and weight % content basically:
Composition weight % content
Borax 5-10
Sodium hydroxide 2-6
Water glass 40-55
Water 30-45
High-temperature resistant coating of the present invention is with yttrium oxide, zirconium white, and lucium is a major ingredient, it is good high temperature resistant, anti-oxidant to make that this coating has, erosion resistance and heat-resistant stable.Lucium is the rareearth enriching material of the residual Re oxide compound after the rare-earth mineral extraction, can be selected from the LaCePrNd enriched substance, sm-eu-gd enriched substance, terbium dysprosium enriched substance, or one or more the mixture in the thulium ytterbium lutetium enriched substance.Add water glass, glass powder, water glass, make coating and must be stablized firmly by the matel coated surface bonding in order to promote coating to by the sticking power on matel coated surface as tackiness agent.Adding atlapulgite again, also is a good tackiness agent, has good adsorptive power again, can play froth breaking.Atlapulgite can be selected from wilkinite, the mixture of one or more in attapulgite or the montmorillonite soil.Add borax, make coating system have stabilization, the pH value that sodium hydroxide is used for regulating coating is 9-11.The raw material of high-temperature resistant coating of the present invention all is the commercial goods.
The preparation method of high-temperature resistant coating of the present invention may further comprise the steps:
1. by above-mentioned solid material component prescription batching,, evenly mix, promptly get the solid material with 50-100 ℃ hot water or water vapor heating;
2. press aforesaid liquid material component prescription batching, stir into solution, promptly get the liquid material;
3. solid material and liquid material are stirred evenly with weight ratio mixing in 1: 1, get yellowish starchiness coating;
4. encapsulation.
The performance test of coating products of the present invention sees Table 1.
Table 1
| Test event | Testing method | Test result |
| Outward appearance | Range estimation | Little yellow mashed prod does not have caking |
| Refractoriness | 1800 ℃ do not come off flawless | |
| PH value | 9-11 | |
| Density d (20/4) | Specific gravity hydrometer | ≥1.45 |
| Sticking power (cross-hatching) | GB1720-79 | 100％ |
| Cohesive strength | 42kg/cm 3 | |
| Ultimate compression strength | 200kg/cm 3 |
The use of coating of the present invention
Before the applying coating, earlier that coated article spare surface cleaning is clean.Before using, coating adds the less water stirring and adjusting to brushing or spray desired denseness.If spraying, pressurized air can be controlled in 4-6kg/cm
2Scope.Coating is after brushing or spraying, and normal temperature seasoning 24-72 hour can be come into operation.
The present invention produces synergy owing to adopted rational prescription between component, thus make a kind of have high temperature resistant, anti-oxidant, erosion resistance, the high-temperature resistant coating that strong adhesion and high-temperature stability are good.The result of coating products performance test also demonstrates the high-performance of coating of the present invention.This coating forms uniformly in the irony crucible surface; no bubble; no shrinkage crack hole; fine and close; cohesive force is strong, the supercoat that stability is high, and this solid supercoat is securely attached to the irony crucible surface; isolate effectively and stoped of the erosion of aluminium liquid, and the aluminum or aluminum alloy of melting in the smelting furnace is had no effect the irony crucible.
The starting material of coating of the present invention all are the commercial goods, the preparation method of coating is simple and convenient, the following examples show, the result of use of coating can compare favourably with the boron nitride coating of import at least, and price will be significantly less than the high-temperature coatings of this import, therefore this coating satisfies corrosion-resistant inexpensive again requirement, has very big DEVELOPMENT PROSPECT.
Embodiment
Embodiment 1
The preparation of solid material: take by weighing 10 kilograms of yttrium oxide, 15 kilograms of zirconium whites, 22 kilograms of the luciums of LaCePrNd enriched substance, 2 kilograms in glass powder, 3 kilograms of 48 kilograms of water glass and wilkinites are mixed with 80 ℃ of hot water homogeneous heating, promptly get the solid material.
The preparation of liquid material: take by weighing borax 8kg, 48 kilograms of water glass (baume 40), 40 kilograms in 4 kilograms in sodium hydroxide and water stir into solution, promptly get the liquid material.
The solid material and the mixing of liquid material that make are stirred evenly, get yellowish pasty state coating, barrelling.The performance of this coating test sees Table 1.
This coating is added the less water stirring and adjusting to the desired denseness of brushing, be applied to the inwall of irony crucible, the about 2mm of the bed thickness of filming, after applying at natural drying at room temperature after 48 hours, be used for the production running of melting aluminium and aluminium alloy as test furnace, after normal operation in 100 days, the coating on the observation inwall of stopping work, top coat is still intact substantially.With the boron nitride coating of another irony crucible inwall brushing import that compares stove, produce running after 90 days, stop work and observe top coat, also be intact substantially.But in the process of removing dope layer, the coating on the contrast stove is very loose easily to be rooted out, and the coating on the test furnace is beaten and can not be removed with the Hammer head because of hard especially, is at last just to remove with the emery wheel manual grinding.The technician that operating experience is arranged infers that according to this phenomenon this test furnace can also run well one month at least.This explanation coating of the present invention has good fire-resistant oxidation resistant erosion resistance, and the coating cohesive force is strong, firm stable.
Embodiment 2
The preparation of solid material: take by weighing 19 kilograms of yttrium oxide, 10 kilograms of zirconium whites, the lucium of LaCePrNd enriched substance and terbium dysprosium enriched substance respectively is 15 kilograms and 4 kilograms, 3 kilograms in glass powder, 5 kilograms of 44 kilograms of water glass and attapulgites are with 50 ℃ of hot water heating, evenly mix, promptly get the solid material.
The preparation of liquid material: take by weighing 10 kilograms of boraxs, 40 kilograms of water glass (baume 40), 45 kilograms in 5 kilograms in sodium hydroxide and water stir into solution, promptly get the liquid material.
The solid material and the mixing of liquid material that make are stirred evenly, get yellowish pasty state coating, barrelling.The performance of this coating test sees Table 1.
Embodiment 3
The preparation of solid material: take by weighing 25 kilograms of yttrium oxide, 14 kilograms of zirconium whites, 13 kilograms of the luciums of thulium ytterbium lutetium enriched substance, 4 kilograms in glass powder, 40 kilograms of water glass, 2 kilograms in 2 kilograms of wilkinites and montmorillonite soil, with 100 ℃ of water vapor heating, evenly mix, promptly get the solid material.
The preparation of liquid material: take by weighing 5 kilograms of boraxs, 55 kilograms of water glass (baume 40), 38 kilograms in 2 kilograms in sodium hydroxide and water stir into solution, promptly get the liquid material.
The solid material and the mixing of liquid material that make are stirred evenly, get yellowish pasty state coating, barrelling.The performance of this coating test sees Table 1.
Claims (3)
1. high-temperature resistant coating, it is characterized in that it comprises solid material and two kinds of components of liquid material: wherein solid material component is made up of following composition and weight % content basically:
Composition weight % content
Yttrium oxide 10-25
Zirconium white 10-25
Lucium 10-25
Glass powder 2-4
Water glass 40-50
Atlapulgite 3-5
Described lucium is one or two or more kinds the mixture that is selected from LaCePrNd enriched substance, terbium dysprosium enriched substance or the thulium ytterbium lutetium enriched substance;
Described solid material is with 50-100 ℃ hot water or water vapor heating and mixes and make,
Liquid material component is made up of following ingredients and weight % content basically:
Composition weight % content
Borax 5-10
Sodium hydroxide 2-6
Water glass 40-55
Water 30-45
Described liquid material stirs into solution by component and makes,
Described solid material and liquid material are with 1: 1 weight ratio blended.
2. high-temperature resistant coating as claimed in claim 1 is characterized in that described atlapulgite is one or two or more kinds the mixture that is selected from wilkinite, attapulgite or the montmorillonite soil.
3. the preparation method of the described high-temperature resistant coating of claim 1 is characterized in that comprising following step:
(1) by the described solid material of claim 1 component prescription batching, with 50-100 ℃ hot water or water vapor heating, mix, get the solid material;
(2) by the described liquid material of claim 1 component prescription batching, stir into solution, get the liquid material;
(3) solid material and liquid material are stirred evenly with weight ratio mixing in 1: 1, get high-temperature resistant coating.
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| CNB200510027741XA CN100447207C (en) | 2005-07-14 | 2005-07-14 | High-temperature-resisting coating and its production |
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| CNB200510027741XA CN100447207C (en) | 2005-07-14 | 2005-07-14 | High-temperature-resisting coating and its production |
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| CN1896149A CN1896149A (en) | 2007-01-17 |
| CN100447207C true CN100447207C (en) | 2008-12-31 |
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| CN103709933A (en) * | 2013-12-10 | 2014-04-09 | 张家港市民扬塑胶科技有限公司 | High temperature resistant coating |
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| CN106734862A (en) * | 2016-12-16 | 2017-05-31 | 池州恒和精密机械有限公司 | A kind of chemicosolidifying sand casting binding agent |
| CN107236393A (en) * | 2017-07-26 | 2017-10-10 | 合肥铭佑高温技术有限公司 | A kind of fire resistant coating and preparation method thereof |
| 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 |
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| US4787439A (en) * | 1985-06-06 | 1988-11-29 | Remet Corporation | Casting of reactive metals into ceramic molds |
| CN1086234A (en) * | 1992-10-28 | 1994-05-04 | 普拉塞尔·S·T·技术有限公司 | The object of powder feed composition, usage and the coating of preparation refractory oxide coating |
| CN1171420A (en) * | 1996-07-22 | 1998-01-28 | 武钢矿建劳动服务公司永辉涂料厂 | Refractory paint and its production method |
| JP2000298706A (en) * | 1999-04-14 | 2000-10-24 | Hitachi Ltd | Card-issuing mechanism |
| US20040038085A1 (en) * | 2002-08-21 | 2004-02-26 | Litton David A. | Thermal barrier coatings with low thermal conductivity |
-
2005
- 2005-07-14 CN CNB200510027741XA patent/CN100447207C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4787439A (en) * | 1985-06-06 | 1988-11-29 | Remet Corporation | Casting of reactive metals into ceramic molds |
| CN1086234A (en) * | 1992-10-28 | 1994-05-04 | 普拉塞尔·S·T·技术有限公司 | The object of powder feed composition, usage and the coating of preparation refractory oxide coating |
| CN1171420A (en) * | 1996-07-22 | 1998-01-28 | 武钢矿建劳动服务公司永辉涂料厂 | Refractory paint and its production method |
| JP2000298706A (en) * | 1999-04-14 | 2000-10-24 | Hitachi Ltd | Card-issuing mechanism |
| US20040038085A1 (en) * | 2002-08-21 | 2004-02-26 | Litton David A. | Thermal barrier coatings with low thermal conductivity |
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| CN1896149A (en) | 2007-01-17 |
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