CN102532964A - Carbon-containing refractory material anti-oxidation coating - Google Patents

Carbon-containing refractory material anti-oxidation coating Download PDF

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CN102532964A
CN102532964A CN2010105932697A CN201010593269A CN102532964A CN 102532964 A CN102532964 A CN 102532964A CN 2010105932697 A CN2010105932697 A CN 2010105932697A CN 201010593269 A CN201010593269 A CN 201010593269A CN 102532964 A CN102532964 A CN 102532964A
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powder
weight percent
coating
containing refractory
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樊有仓
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Abstract

The invention provides a carbon-containing refractory material anti-oxidation coating. In the carbon-containing refractory material anti-oxidation coating, feldspar powder, wax limestone powder, glass and a metallic oxide are taken as fillers, modified silicic acid is taken as a bonding agent, a small amount of performance adjusting agent is added, and special baking is not required. A preparation method of the coating is convenient, and has low cost and high anti-oxidation performance.

Description

The carbon containing refractory antioxidant coating
Technical field
The present invention relates to a kind of antioxidant coating, relate in particular to a kind of antioxidant coating of carbon containing refractory.
Technical background
Carbon containing refractory is led general being applied in the ferrous metallurgy technological process because of high temperature use propertieies such as its good slag resistance, thermostability, high thermal conductivity.Cause material surface Decarburized layer void content to increase and short texture but carbon is oxidized easily in the oxidizing atmosphere under the high temperature, influence work-ing life.Traditional method is in matrix of materials, to add high inhibitor such as metallic aluminium, the magnesium etc. of price, and is airborne like the appearance side or to preheat process invalid to being exposed to but this method can only solve oxidation of coal problem in the use.The baking conventional with ladle is example, contains carbon brick general surface after toasting and produces the decarburization tectorium more than the 15mm, and Decarburized layer eats away after containing steel very soon, and the normal erosion rate of brick is 2~3mm/ time, reduces the life-span more than 5 times thus.
At carbon containing refractory surfaces coated last layer coating, in case the infiltration of block and do not produce the decarburization tectorium can increase the work-ing life more than 10% generally speaking.The raw material of existing carbon containing refractory antioxidant coating need be fired specially, and cost is high.Disclosed like patent CN 1052878A is a kind of employing TiO 2, SiC, Si 3N 4Expensive coating for filler.Patent CN 1066078A and the disclosed coating of CN 1035121A all need to coating in advance between 80 degree~110 degree baking in 2~4 hours produce intensity and bonding force, the application of this coating incompatibility metallurgical industryization.Need secondary to smear during the then use of the disclosed coating of Japanese Patent JP 60108388A, exist and use the defective that goes up inconvenience.
After existing coating floating coat forms the glaze layer, generally can not use repeatedly.The coating that has then is difficult to long-time preservation for pulpous state.And the powder of the coating that has is with the essential special mixing pan ability mixing of wedding agent, defectives such as field mix inconvenience.
Technology contents
In view of above-mentioned defective, the object of the present invention is to provide the antioxidant coating of the carbon containing refractory that a kind of cost is low, easy to use, antioxidant effect is good.
Each component and the weight percent thereof of the antioxidant coating of carbon containing refractory of the present invention are:
Borosilicate glass powder 10~60%
Cured stone powder 10~50%
Feldspar Powder 10~60%
Wherein the component of wedding agent and weight percent are:
Potash water glass and sodium silicate 97~100%
Urea resin: 0~3%
Potash water glass: sodium silicate=2: 1~3: 1
Powder: wedding agent=100: 110~120
Coating of the present invention also includes one or more in alumina powder≤5%, norbide≤3%, sodium hydroxide≤1%;
Each component and the weight percent thereof of the antioxidant coating of carbon containing refractory of the present invention are:
Borosilicate glass powder 20~40%
Stone flour 25~35%
Feldspar Powder 20~40%
Alumina powder 2~3%
Norbide 1~3%
Sodium hydroxide 0.1~1%
Wedding agent:
Potash water glass and sodium silicate 97~100%
Urea resin 1~3%
Potash water glass: sodium silicate=2: 1~3: 1
Powder: wedding agent=100: 110~120
Contain Na in the wherein above-mentioned borosilicate glass powder 2The weight percent of O is 5~30%, contains B 2O 3Weight percent be 6~58% and contain SiO 2Weight percent be 8~64%.
Contain SiO in the above-mentioned Feldspar Powder 2Weight percent be 60~78%, contain Al 2O 3Weight percent be 2~20%, contain K 2The weight percent of O be 2~12% with contain Na 2The weight percent of O is 3~10%.
Contain SiO in the above-mentioned cured stone powder 2Weight percent be 48~75%, contain Al 2O 3Weight percent be 15~42%.
The compound method of coating of the present invention: wedding agent is mixed and add entry process to add powder gradually and stir behind the solution and just make coating of the present invention.
Among the present invention borosilicate glass powder as in temperature form down the main raw material composition of adamantine layer, and cured stone powder and Feldspar Powder mainly are to spend 800~1000 to play effective fire-resistant effect, prevent that coating from crossing low and trickle in this TR viscosity.The denseness that has adopted alumina powder at high temperature to regulate coating equally.The main effect of boron carbide powder is that coating and carbon containing refractory have good chemical compatibility and mechanical consistency, oxidable again formation B more than 700 degree 2O 3, not only play the sealer filling effect, also the viscosity of adjustable coating and flowability.
Soda glass is that ceramic coating is commonly used in the wedding agent, but self-solidifying speed is slower, is prone to cause coating cracking, adopts potassic glass compound, improves the adhesive power of coating to carbonaceous article.The adding of urea resin can further improve the associativity of water glass.
The present invention adopts Feldspar Powder, cured stone powder, glass and MOX to do filler, makees wedding agent with modification silicic acid, adds the little performance regulator, does not need special baking, and making can make things convenient for, and cost is low.Coating of the present invention, available oxidized in baking or use to prevent carbon containing refractory, broad application temperature range can effectively protect carbon containing refractory not oxidized in 650 ℃~1200 ℃ scopes.The special glaze layer thermal shock resistance that coating high-temp forms down is strong, resistance to air loss good, can experience repeatedly heating and cooling circulation and not ftracture.As but filler in the coating and wedding agent are separately preserved indefinitely, only need simple tool easily coating to be mixed during use, do not need special coating to mix stone roller equipment.The coating finished product is a muddy, can preserve for a long time, can directly once brush or spraying application.
With the magnesia carbon brick test is example, and the result shows the sample that scribbles ceramic coating of the present invention after 1000 ℃ of processing, and the surface has formed the fine and close adamantine layer of one deck 0.2~0.3mm, evenly covers specimen surface securely.The sample tangent plane shows non-oxidation decarburization phenomenon.The control sample that no coating is handled produces the 17mm zone of oxidation after with the condition pyroprocessing.
Commerical test is example with the ladle, and the ladle liner structure is a Bao Bi molten bath Al2O3MgOC Bricks, and slag line is a magnesia carbon brick, is that half ladle inner wall of bound pair carries out spray treatment with the longitudinal axis.Through baking (1000 ℃ * 20h) back uses 25 stoves to amount to the Sheng steel time of 3300min, residual brick thickness measurement shows that the processing brick is than the residual thick 10~15mm of Duoing of the brick that is untreated.Can prolong ladle life 3~5 stoves.
Embodiment
Press table 1 preparation various embodiments of the present invention.
Compound method: wedding agent mixed and add about 3% water and form solution, add powder gradually and stir.
The performance of the coating of embodiments of the invention is as shown in table 1.
Table 1
Figure BSA00000389450300051
Embodiment 1:
Above-mentioned borosilicate glass powder contains the Na of weight about 30% 2O and 12% B 2O 3And 54% SiO 2
Above-mentioned feldspar contains 72% SiO 2, 18% Al 2O 3, 6% K 2O and 3% Na 2O.
Above-mentioned cured stone contains 48% SiO 2, 42% Al 2O 3
Embodiment 2
Above-mentioned borosilicate glass powder contains the Na of weight 28% 2O and 8% B 2O 3And 64% SiO 2
Above-mentioned feldspar contains 62% SiO 2, 20% Al 2O 3, 2% K 2O and 10% Na 2O.
Above-mentioned cured stone contains 75% SiO 2, 20% Al 2O 3
Embodiment 3:
Above-mentioned borosilicate glass powder contains the Na of weight 28% 2O and 52% B 2O 3And 20% SiO 2
Above-mentioned feldspar contains 65% SiO 2, 18% Al 2O 3, 10% K 2O and 7% Na 2O.
Above-mentioned cured stone contains 70% SiO 2, 26% Al 2O 3
Embodiment 4
Above-mentioned borosilicate glass powder contains the Na of weight 28% 2O and 8% B 2O 3And 64% SiO 2
Above-mentioned feldspar contains 62% SiO 2, 20% Al 2O 3, 2% K 2O and 10% Na 2O.
Above-mentioned cured stone contains 75% SiO 2, 20% Al 2O 3
Use the coating of the embodiment of the invention:
Constructional method: spread pen is coated in the magnesia carbon brick surface, and thickness is 0.2mm.
Use technology: coating self-solidifying sclerosis after 1 hour reached 1000 ℃ and be incubated 6 hours (simulation ladle baking system) in 10 hours through 100 ℃/hour again.
Use result such as table 2.
Table 2
Figure BSA00000389450300071

Claims (4)

1. each component of a carbon containing refractory antioxidant coating and weight percent thereof are:
Borosilicate glass powder 10~60%
Cured stone powder 10~50%
Feldspar Powder 10~60%
Wherein wedding agent is:
Potash water glass and sodium silicate 97~100%
Urea resin 0~3%
Potash water glass: sodium silicate=2: 1~3: 1
Powder: wedding agent=100: 110~120
2. carbon containing refractory antioxidant coating as claimed in claim 1 is characterized in that, also further includes in alumina powder≤5%, norbide≤3%, sodium hydroxide≤1% one or more.
3. each component of a carbon containing refractory antioxidant coating and weight percent thereof are:
Borosilicate glass powder 20~40%
Cured stone powder 25~35%
Feldspar Powder 20~40%
Alumina powder 2~3%
Norbide 1~3%
Sodium hydroxide 0.1~1%
Wedding agent:
Potash water glass and sodium silicate 97~100%
Urea resin 1~3%
Potash water glass: sodium silicate=2: 1~3: 1
Powder: wedding agent=100: 110~120
4. like claim 1,2 or 3 described carbon containing refractory antioxidant coatings, it is characterized in that, contain Na in the wherein said borosilicate glass powder 2The weight percent of O is 5~30%, contains B 2O 3Weight percent be 6~58% and contain SiO 2Weight percent be 8~64%;
Contain SiO in the described Feldspar Powder 2Weight percent be 60~78%, contain Al 2O 3Weight percent be 2~20%, contain K 2The weight percent of O be 2~12% with contain Na 2The weight percent of O is 3~10%;
Contain SiO in the described cured stone powder 2Weight percent be 48~75%, contain Al 2O 3Weight percent be 15~42%.
CN2010105932697A 2010-12-17 2010-12-17 Carbon-containing refractory material anti-oxidation coating Pending CN102532964A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104263057A (en) * 2014-10-08 2015-01-07 济南新峨嵋实业有限公司 High-temperature insulating coating for steel ladle
CN105000897A (en) * 2015-07-24 2015-10-28 嘉善美节陶瓷科技有限公司 Protection material for ladle magnesia carbon bricks and application method thereof
CN105731847A (en) * 2014-12-10 2016-07-06 辽宁法库陶瓷工程技术研究中心 Waterborne high-temperature-resistant inorganic binder and preparation method thereof
CN108003715A (en) * 2018-01-02 2018-05-08 遵义航天新力精密铸锻有限公司 One kind is used for die & mold treatment protective coating
CN109111112A (en) * 2018-09-05 2019-01-01 鞍钢股份有限公司 A kind of tundish slag absorbing device antioxidizing paint and method
CN110482905A (en) * 2019-08-12 2019-11-22 武汉市科达耐火有限责任公司 A kind of iron runner working lining antioxidizing paint and preparation method thereof
CN111960832A (en) * 2020-08-24 2020-11-20 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

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104263057A (en) * 2014-10-08 2015-01-07 济南新峨嵋实业有限公司 High-temperature insulating coating for steel ladle
CN105731847A (en) * 2014-12-10 2016-07-06 辽宁法库陶瓷工程技术研究中心 Waterborne high-temperature-resistant inorganic binder and preparation method thereof
CN105731847B (en) * 2014-12-10 2018-04-03 辽宁法库陶瓷工程技术研究中心 A kind of aqueous high-temperature-resistant inorganic binder and preparation method thereof
CN105000897A (en) * 2015-07-24 2015-10-28 嘉善美节陶瓷科技有限公司 Protection material for ladle magnesia carbon bricks and application method thereof
CN108003715A (en) * 2018-01-02 2018-05-08 遵义航天新力精密铸锻有限公司 One kind is used for die & mold treatment protective coating
CN109111112A (en) * 2018-09-05 2019-01-01 鞍钢股份有限公司 A kind of tundish slag absorbing device antioxidizing paint and method
CN109111112B (en) * 2018-09-05 2020-11-20 鞍钢股份有限公司 Anti-oxidation coating for tundish slag sucker and method
CN110482905A (en) * 2019-08-12 2019-11-22 武汉市科达耐火有限责任公司 A kind of iron runner working lining antioxidizing paint and preparation method thereof
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
CN111960832A (en) * 2020-08-24 2020-11-20 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
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

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Application publication date: 20120704