CN101830732B - Antioxidant coating for surface of aluminum oxide-silicon carbidee-carbon brick - Google Patents
Antioxidant coating for surface of aluminum oxide-silicon carbidee-carbon brick Download PDFInfo
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- CN101830732B CN101830732B CN2010101569454A CN201010156945A CN101830732B CN 101830732 B CN101830732 B CN 101830732B CN 2010101569454 A CN2010101569454 A CN 2010101569454A CN 201010156945 A CN201010156945 A CN 201010156945A CN 101830732 B CN101830732 B CN 101830732B
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Abstract
The invention relates to an antioxidant coating for the surface of an aluminum oxide-silicon carbidee-carbon (ASC) brick. The antioxidant coating is aqueous paste substance formed by mixing a component A and a component B by a weight part proportion of 100:101.5-102.5, wherein the component A is powder formed by mixing 50-70 parts by weight of glaze powder, 2-5 parts by weight of alpha-AL2O3 micro-powder, 1-7 parts by weight of bentonite powder, 1-3 parts by weight of SiO2 micro-powder and 26-35 parts by weight of silicon carbide powder; the component B viscous fluid formed by dissolving 1.5-2.5 parts by weight of carboxymethyl cellulose into 100 parts by weight of water, and the glaze powder in the component A is fine powder prepared by drying and grinding an material formed by mixing, melting and quenching 40-60 parts by weight of borax, 12-18 parts by weight of quartz, 8-15 parts by weight of sodium carbonate, 12-15 parts by weight of calcite and 8-12 parts by weight of albite. After coated with the antioxidant coating, ASC bricks of the lining of a torpedo type mixed iron car has the service life prolonged at least for 50 heating numbers, which saves the refractory material.
Description
Technical field
The present invention relates to a kind of antioxidant coating that is used for aluminum oxide-silicon carbide--carbon brick surface, especially for the surperficial antioxidant coating of the aluminum oxide-silicon carbide--carbon brick of fish torpedo type iron mixing vehicle liner.
Background technology
Fish torpedo type iron mixing vehicle is shipment molten iron or the equipment that therein molten iron is carried out desulfurization, desiliconization and dephosphorization treatment, and its liner aluminum oxide-silicon carbide--carbon brick (hereinafter to be referred as the ASC brick) is the carbon containing green brick.In fish torpedo type iron mixing vehicle, lay with the ASC brick, fire door with fire door material casting complete after, must from about normal temperature to 900 ℃, carry out about 100 hours baker, then splendid attire molten iron while hot by drying out curve.But, with coal gas or fuelled with natural gas, utilize airborne comburant oxygen to carry out in the baker process, certainly will make ASC brick surface (because of ASC brick carbon containing) that oxidation corrosion takes place.Usually, through about 100 hours naked light baking, the oxidized degree of depth of ASC brick workplace can reach 25～30mm, this layer zone of oxidation short texture, and intensity is low, very easily by molten iron infiltration and erosion, more is unable to undergo washing away of high temperature liquid iron.This shows that fish torpedo type iron mixing vehicle liner ASC brick just suffers damage in the baker process, must cause shorten the work-ing life of fish torpedo type iron mixing vehicle like this.Therefore, improving the oxidation-resistance on fish torpedo type iron mixing vehicle liner ASC brick surface, is very necessary to work-ing life and the saving refractory materials that improves fish torpedo type iron mixing vehicle.
Summary of the invention
The objective of the invention is: a kind of fish torpedo type iron mixing vehicle antioxidant coating that is used for aluminum oxide-silicon carbide--carbon brick surface in work-ing life that improves is provided.
The technical scheme that realizes the object of the invention is: a kind of antioxidant coating that is used for aluminum oxide-silicon carbide--carbon brick surface, and it is to mix the water-based soup compound that forms by the B component of the component A of 100 weight parts and 101.5～102.5 weight parts;
Said component A is by glaze powder 50～70 weight parts, α-Al
2O
3Micro mist 2～5 weight parts, bentonite in powder 1～7 weight part, SiO
2Micro mist 1～3 weight part and carborundum powder 26～35 weight parts mix the meal that forms;
Said B component is the viscous liquid of the water-soluble formation of CMC 99.5, and wherein the weight part ratio of CMC 99.5 and water is 1.5～2.5: 100;
Glaze powder among the component A is by borax 40～60 weight parts; Quartzy 12～18 weight parts; Yellow soda ash 8～15 weight parts after calcite 12～15 weight parts and albite 8～12 weight parts mix, place kiln to be heated to the molten vitreum; Then it is imported quenching in the cold water, pull, dry and grind the material that forms behind the quenching out make fine powder.
Above-mentioned antioxidant coating, its granularity that constitutes said each component of component A is following: glaze powder is 10～88 μ m, α-Al
2O
3Micro mist is 0.5～8 μ m, and bentonite in powder is 10～74 μ m, SiO
2Micro mist is that 0.1～0.5 μ m and carborundum powder are 88～175 μ m.
Above-mentioned antioxidant coating, the melt temperature of the glaze powder among its said component A are 650 ℃～750 ℃.
Above-mentioned antioxidant coating, the CMC 99.5 in its said B component is an Xylo-Mucine.
Technique effect of the present invention is: the antioxidant coating of technical scheme of the present invention contains an amount of glaze powder; Because it is by borax 40～60 weight parts, quartzy 12～18 weight parts, yellow soda ash 8～15 weight parts; After calcite 12～15 weight parts and albite 8～12 weight parts mix; Place kiln to be heated to the molten vitreum, then it is imported quenching in the cold water, pulling, dry and be milled to the material that forms behind the quenching out granularity is the fine powder that 10～88 μ m make.After being coated in the ASC brick surface that lays in the fish torpedo type iron mixing vehicle with the antioxidant coating that contains this glaze powder; When from about normal temperature to 900 ℃, fish torpedo type iron mixing vehicle being carried out baker by drying out curve; When oven drying temperature reached 700 ℃～800 ℃ (this temperature is the temperature of graphite oxidation just), the glaze powder in the coating formed skim glassy phase material at ASC brick melt surface, under the tensile effect; This material can cover the surface of ASC brick equably; Thereby intercepted the contacting of the used oxidizing gas of baker and ASC brick surface, infiltration, therefore, weakened the oxidized degree of ASC brick between drying-out period (particularly ASC brick institute carbon containing); Because glaze powder is after processing fine powder by ratio of components in advance; Mix with other components of coating again; Can guarantee between drying-out period temperature (650～750 ℃) fusion that glaze powder contained in the coating can set by prescription like this; And do not receive the influence of other compositions in the formulation for coating material, guarantee that institute's carbon containing is not oxidized in the ASC brick; Because the silit in the formulation for coating material of the present invention also has oxidation-resistance, and is reasonable with the collocation of glaze powder, therefore, guarantee that the ASC brick that applies invention coating has good oxidation-resistance between drying-out period; α-Al in the formulation for coating material of the present invention
2O
3Micro mist can make ORC between drying-out period, produce higher-strength, therefore, has increased the provide protection to ASC brick surface; Wilkinite in the formulation for coating material of the present invention can guarantee that coating did not deposit in the usage period, and the SiO in the formulation for coating material of the present invention
2Micro mist can make coating have good brushing property, so each component of formulation for coating material of the present invention has synergy, guarantee to be coated in ASC brick surface after, between drying-out period, can play antioxygenation.Evidence is put into electric furnace after coating of the present invention is coated in ASC brick surface, from normal temperature rise to 1450 ℃ and 1450 ℃ the insulation 3 hours, ASC brick surface is also not oxidized basically, can the zone of oxidation of ASC brick be controlled at below the 5mm.Therefore, conservative estimation can make prolong 50 heats at least the work-ing life of fish torpedo type iron mixing vehicle, has reduced the rebuilding number of times of fish torpedo type iron mixing vehicle liner ASC brick, has saved refractory materials greatly.
Embodiment
Below in conjunction with embodiment the present invention is made further specific descriptions, but be not so limited.
The raw materials used general raw material of refractories industry that is of embodiment can be buied through the commercial channel.
(1) preparation antioxidant coating
Antioxidant coating of the present invention mixes the water-based soup compound that forms by the component A of 100 weight parts and the B component of 101.5～102.5 weight parts;
Said component A is by glaze powder 50～70 weight parts, α-Al
2O
3Micro mist 2～5 weight parts, bentonite in powder 1～7 weight part, SiO
2Micro mist 1～3 weight part and carborundum powder 26～35 weight parts mix the meal that forms;
Said B component is the viscous liquid of the water-soluble formation of CMC 99.5, and wherein the weight part ratio of CMC 99.5 and water is 1.5～2.5: 100;
Glaze powder among the component A is by borax 40～60 weight parts; Quartzy 12～18 weight parts; Yellow soda ash 8～15 weight parts after calcite 12～15 weight parts and albite 8～12 weight parts mix, place kiln to be heated to the molten vitreum; Then it is imported quenching in the cold water, pull, dry and grind the material that forms behind the quenching out make fine powder.
Embodiment 1～3 preparation glaze powder
Concrete preparation process is following:
1. press table 1 prescription and prepare the glaze powder raw material
Table 1
| Component | Granularity | Consumption, weight part embodiment 1 | Consumption, weight part embodiment 2 | Consumption, weight part embodiment 3 |
| Borax | 175 μ m tail over<=and 10% | 40 | 60 | 50 |
| Quartzy | 88 μ m tail over<=and 10% | 18 | 12 | 16 |
| Yellow soda ash | 175 μ m tail over<=and 10% | 15 | 8 | 12 |
| Calcite | 88 μ m tail over<=and 10% | 15 | 12 | 13 |
| Albite | 88 μ m tail over<=and 10% | 12 | 8 | 9 |
2. prepare glaze powder
The raw materials mix that 1. step is prepared evenly after, place kiln to heat, make it be the molten vitreum; Then it is imported quenching in the cold water; Pulling, dry and be milled to the material that forms behind the quenching out fineness is 88 μ m, makes glaze powder A, B and C respectively, preserves subsequent use;
Embodiment 4～6 preparation antioxidant coatings
Concrete preparation process is following:
1. press table 2 prescription and prepare the raw material of coating composition A
Table 2
| Component | Granularity, μ m | Consumption, weight part embodiment 4 | Consumption, weight part embodiment 5 | Consumption, weight part embodiment 6 |
| Glaze powder | 10～88 | 50 (embodiment 1 system glaze powder A) | 70 (embodiment 2 system glaze powder B) | 60 (embodiment 3 system glaze powder C) |
| α-Al 2O 3Micro mist | 0.5～8 | 5 | 2 | 2.5 |
| Bentonite in powder | 10～74 | 7 | 1 | 2.0 |
| SiO 2Micro mist | 0.1～0.5 | 3 | 1 | 1.5 |
| Carborundum powder | 88～175 | 35 | 26 | 34 |
2. be to prepare CMC 99.5 (preferably carboxymethyl cellulose sodium) and water at 2.0: 100 by the weight part ratio of CMC 99.5 and water;
3. prepare antioxidant coating
The raw materials mix of respectively 1. step being prepared evenly makes the component A that pulverulent mixture is embodiment 4～6;
The Xylo-Mucine that 2. step is prepared adds in the entry and stirs, and makes the Xylo-Mucine dissolving form viscous liquid and promptly makes 102.0 parts by weight of component B;
With the component A of the embodiment 4 of above-mentioned 100 weight parts that make, join in the B component of 102.0 weight parts of preparation as stated above, mix the water-based soup compound of formation, be antioxidant coating I of the present invention;
With the component A of the embodiment 5 of above-mentioned 100 weight parts that make, join in the B component of 102.0 weight parts of preparation as stated above, mix the water-based soup compound of formation, be antioxidant coating II of the present invention;
With the component A of the embodiment 6 of above-mentioned 100 weight parts that make, join in the B component of 102.0 weight parts of preparation as stated above, mix the water-based soup compound of formation, be antioxidant coating III of the present invention.
(2) actual effect of antioxidant coating
Single brick laboratory test
The antioxidant coating III brushing that embodiment 6 makes is surperficial at the ASC brick; Coat-thickness is controlled at 0.25～0.35mm; Put into electric furnace after the seasoning, furnace temperature is risen to 1450 ℃ and 1450 ℃ of insulations 3 hours from normal temperature, it is not oxidized basically to take out back visual inspection ASC brick surface; The oxidated layer thickness of ASC brick below 5mm, the oxidated layer thickness (25～30mm) when not being coated with antioxidant coating far below the ASC brick.
Single brickwork is already tested
In November 30,2007 20 days to 2007 November in, with four ASC-T
2Standard square (wherein two antioxidant coating III that scribble embodiment 6) is delivered to certain iron and steel corporation, puts into fish torpedo type iron mixing vehicle, toasts 900 ℃ of top temperatures by drying out curve.The fish torpedo type iron mixing vehicle baker finishes, with four ASC-T
2Standard square takes out, and naturally cools to room temperature from 900 ℃.Check wherein two bricks, an ASC-T who is coated with antioxidant coating then
2Standard square, former brick substance 5.75kg before the baking, after baking, outward appearance is kept intact basically, has only localized delamination, and brick is 5.3kg heavily, is 92% of former brick weight; Another piece is not coated with the ASC-T of antioxidant coating
2Standard square, changed beyond recognition and the full sized brick weave construction is loose after baking, intensity is low, and brick is 3.19kg heavily, is merely 55.6% of former brick weight.Experiment showed, that this antioxidant coating truly has the not oxidized corrosive effect in surface of protection ASC brick in the baker process.
The fish torpedo type iron mixing vehicle commerical test
At the beginning of 2007 11 months, be the antioxidant coating III coating of the ASC brick surface of No. 49 260 tons of fish torpedo type iron mixing vehicle liners of certain Iron And Steel Company with embodiment 6.This fish torpedo type iron mixing vehicle to 2010 loads and transports molten iron 1090 heats year February altogether, far surpasses its contract work-ing life (900 heat).
A large amount of evidences, as long as antioxidant coating of the present invention all can reach the level of above-mentioned actual effect, so do not give unnecessary details one by one at this in the technical scheme scope.
(3) economic benefit of antioxidant coating estimation
For safety, at present in the industry usually regulation fish torpedo type iron mixing vehicle work-ing life be 900 heats, requiring the remaining length of ASC brick is 80～90mm.By this regulation, for the ASC brick that a kind of length is 287mm, after the ASC brick used 900 heats, the length actual consumption of ASC brick was 197～207mm, calculate thus, the every use of fish torpedo type iron mixing vehicle once, the length average loss of ASC brick is 0.219～0.23mm.
And the every baker of the fish torpedo type iron mixing vehicle of uncoated antioxidant coating once, and the ASC brick length loss of its liner is 25～30mm.
Press baker once; The brick length that consumes is 25mm; In conjunction with the every use of above-mentioned fish torpedo type iron mixing vehicle once; Allowing the length average loss of ASC brick is 0.219～0.23mm, can calculate baker once, is equivalent to make reduce 114.2 heats (25mm/0.219mm) to 108.7 heats (25mm/0.23mm) work-ing life of fish torpedo type iron mixing vehicle.This shows that baker is to there being very big influence in work-ing life of fish torpedo type iron mixing vehicle.
A large amount of tests show that the effect conservative estimation of antioxidant coating can make and prolong 50 heats the work-ing life of fish torpedo type iron mixing vehicle at least.And the value of a fish torpedo type iron mixing vehicle liner ASC brick is used 900 times by 500,000 yuans of estimations altogether, and therefore, every use once is equivalent to spend 555.5 yuan (500,000 yuan/900 times).Like this, use antioxidant coating of the present invention to make to prolong 50 heats the work-ing life of fish torpedo type iron mixing vehicle and just can practice thrift Renminbi more than 2.5 ten thousand yuan, the more important thing is and also practiced thrift refractory materials, and then also saved the natural resource of many preciousnesses.
Claims (3)
1. an antioxidant coating that is used for aluminum oxide-silicon carbide--carbon brick surface is characterized in that, it is to mix the water-based soup compound that forms by the B component of the component A of 100 weight parts and 101.5～102.5 weight parts;
Said component A is by glaze powder 50～70 weight parts, α-Al
2O
3Micro mist 2～5 weight parts, bentonite in powder 1～7 weight part, S iO
2Micro mist 1～3 weight part and carborundum powder 26～35 weight parts mix the meal that forms;
Said B component is the viscous liquid of the water-soluble formation of CMC 99.5, and wherein the weight part ratio of CMC 99.5 and water is 1.5～2.5: 100;
Glaze powder among the component A is by borax 40～60 weight parts; Quartzy 12～18 weight parts, yellow soda ash 8～15 weight parts are after calcite 12～15 weight parts and albite 8～12 weight parts mix; Place kiln to be heated to the molten vitreum; Then it is imported quenching in the cold water, pull, dry and grind the material that forms behind the quenching out make fine powder, the melt temperature of glaze powder is 650 ℃～750 ℃.
2. antioxidant coating according to claim 1 is characterized in that, the granularity that constitutes said each component of component A is following: glaze powder is 10～88 μ m, α-Al
2O
3Micro mist is 0.5～8 μ m, and bentonite in powder is 10～74 μ m, SiO
2Micro mist is that 0.1～0.5 μ m and carborundum powder are 88～175 μ m.
3. antioxidant coating according to claim 1 is characterized in that, the CMC 99.5 in the said B component is an Xylo-Mucine.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101569454A CN101830732B (en) | 2010-04-16 | 2010-04-16 | Antioxidant coating for surface of aluminum oxide-silicon carbidee-carbon brick |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101569454A CN101830732B (en) | 2010-04-16 | 2010-04-16 | Antioxidant coating for surface of aluminum oxide-silicon carbidee-carbon brick |
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| CN101830732A CN101830732A (en) | 2010-09-15 |
| CN101830732B true CN101830732B (en) | 2012-01-11 |
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| CN102225867B (en) * | 2011-05-24 | 2013-04-17 | 河南益丰高温材料股份有限公司 | Silicon carbide furnace door brick for ore-smelting electric furnace and preparation method thereof |
| CN103173790B (en) * | 2013-04-17 | 2016-08-17 | 湖南创元铝业有限公司 | Carbon annode coating, the carbon annode using this coating and this preparation method for coating |
| CN110128150A (en) * | 2019-04-30 | 2019-08-16 | 浙江攀盛冶金材料有限公司 | A kind of modified environment protection type forsterite Tu skinning loam production method |
| CN110482905B (en) * | 2019-08-12 | 2021-06-22 | 武汉市科达耐火有限责任公司 | Anti-oxidation coating for working lining of iron runner and preparation method thereof |
| CN111960832B (en) * | 2020-08-24 | 2022-10-11 | 青岛弘汉耐火材料有限公司 | Bare body sintering coating for aluminum-carbon product and bare body sintering method |
Family Cites Families (4)
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| JPS6191078A (en) * | 1984-10-08 | 1986-05-09 | 新島物産株式会社 | Manufacture of inorganic lightweight foamed body |
| CN1035835A (en) * | 1988-03-16 | 1989-09-27 | 中国科学院化工冶金研究所 | Antioxidant protective paint for carbon product |
| CN1012621B (en) * | 1988-04-07 | 1991-05-15 | 中国科学院化工冶金研究所 | Antioxidation protective coating for carbon articles |
| CN101475403B (en) * | 2009-01-19 | 2011-09-14 | 马鞍山市益江高温陶瓷制造有限公司 | Preparation method for inoxidzable coating of aluminum carbon fire-resistant material |
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