CN110317989B - High-alumina kiln welding material and using method thereof - Google Patents
High-alumina kiln welding material and using method thereof Download PDFInfo
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- CN110317989B CN110317989B CN201910628175.XA CN201910628175A CN110317989B CN 110317989 B CN110317989 B CN 110317989B CN 201910628175 A CN201910628175 A CN 201910628175A CN 110317989 B CN110317989 B CN 110317989B
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- alumina
- kiln
- welding
- soldering
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/005—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides comprising a particular metallic binder
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/12—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on oxides
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
- F27D1/1678—Increasing the durability of linings; Means for protecting
Abstract
The invention provides a high-alumina kiln welding material and a using method thereof, wherein the welding material comprises aluminum powder, aluminum oxide, mullite, black silicon carbide sand, zirconium silicate, yttrium oxide and titanium diboride according to 100% by mass, the granularity of the aluminum oxide is not more than 0.5mm, the granularity of the aluminum powder is 0.07-0.08mm, the granularity of the mullite is 0.2-0.5mm, and the granularity of the black silicon carbide sand is 0.2-0.5 mm.
Description
Technical Field
The invention relates to the technical field of glass kiln repair, in particular to a high-alumina kiln repair material and a use method thereof.
Background
In the metallurgical and chemical industries of glass, coking, steel making and the like, industrial kilns for production are built by various types of refractory bricks with various properties, in the high-temperature production, the refractory bricks in the kilns have different degrees of melting loss, explosive fracture defects and the like due to various types of reasons in the working and production processes of the kilns, and the damage of the refractory bricks in the kilns gradually evolves to influence the overall service life of the kilns at a later stage.
In the working and production process of the kiln, because the high temperature in the kiln does not have a proper means at all, the production cannot be stopped to treat the damage of refractory bricks in the kiln, the service life of the kiln is greatly reduced, the normal production is influenced, and the cost investment of enterprises is increased.
Therefore, a welding repair technology is developed, the kiln in work can be repaired, however, in the working process of the kiln, welding repair materials easily drop to cause pollution and other influences on products in the kiln.
Disclosure of Invention
In view of the above, the invention provides a high-alumina gunning material with lower rebound rate during welding repair and a use method thereof.
The technical scheme of the invention is realized in such a way that the invention provides a high-alumina kiln welding material, which comprises the following components in percentage by weight of 100 percent:
on the basis of the technical scheme, the granularity of the alumina is preferably not more than 0.5 mm.
On the basis of the technical scheme, preferably, the alumina with the granularity of less than 0.088mm accounts for 1-10% of the total weight of the alumina;
alumina with the granularity of 0.088-0.2mm accounts for 14-28% of the alumina longitudinal beam;
the alumina with the granularity of 0.2-0.3mm accounts for 30-60% of the alumina longitudinal beam;
the alumina with the granularity of 0.3-0.5mm accounts for 15-45% of the total weight of the alumina.
On the basis of the technical scheme, preferably, the purity of the aluminum powder is not less than 9%, and the granularity of the aluminum powder is 0.07-0.08 mm.
Still more preferably, the mullite has a particle size of 0.2-0.5 mm.
On the basis of the technical scheme, preferably, the granularity of the black silicon carbide is 0.2-0.5 mm.
The invention also provides a use method of the high-alumina kiln welding material, preferably, the method comprises the following steps:
mixing the raw materials of the high-alumina kiln welding repair material according to a mass ratio for later use, preparing a welding repair gun, a current-carrying gas and a water pump, adding the welding repair material into the welding repair gun, and connecting both a sharp tool and the water pump to the welding repair gun;
step two, cleaning the surface of the refractory brick to be welded, removing surface impurities, and performing rough treatment on the repaired surface;
thirdly, conveying the current-carrying gas and the welding materials to the damaged part of the surface of the refractory brick to be repaired by using a welding repair gun, and melting the welding materials at the damaged part by using high temperature in the kiln so as to weld the damaged part and the welding materials together;
and step four, repeating the step three until the surface damage of the refractory brick is repaired.
On the basis of the above technical solution, preferably, the carrier gas includes oxygen and nitrogen.
On the basis of the technical scheme, preferably, in the third step, the spraying distance of the welding repair gun is 10-50 cm.
On the basis of the technical scheme, preferably, the amount of the soldering flux sprayed in the third step is 20-40 kg.
Compared with the prior art, the high-alumina kiln welding material and the use method thereof have the following beneficial effects:
(1) the high-alumina kiln welding material adopts alumina with the granularity not more than 0.5mm and aluminum powder with the granularity of 0.07-0.08mm, and is matched with zirconium silicate and black silicon carbide sand, so that the welding material has good physical properties and high-temperature tolerance, has higher refractoriness under load, still keeps better hardness in a high-temperature environment, and is not easy to corrode and deform;
(2) the invention also adds yttria and titanium diboride into the raw materials, wherein the yttria not only can improve the high temperature resistance of the welding material, but also can improve the bonding capability of the yttria and the original kiln refractory brick, reduces the falling rate of the welding material in the welding process, improves the quality of products in the kiln, reduces the defective rate, has extremely high melting point of the titanium diboride and good hardness and oxidation resistance, and can improve the refractoriness of the whole material and the hardness after welding when being added as the welding material.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the following embodiments, the raw materials used are as follows:
| raw materials | Manufacturer of the product |
| Aluminum powder | Powdered aluminium |
| Alumina oxide | New flame retardant Material Co Ltd |
| Mullite | Xinmi Zhengyang foundry of casting materials |
| Black silicon carbide sand | Dongguan-refined rock surface treatment Material Co., Ltd |
| Zirconium silicate | Shandong Chen Yuan fission Co Ltd |
| Yttria | Yaoxi Metal materials Co Ltd, Qinghe county |
| Titanium diboride | Qinhuang island Yinuo high-new materials development Co Ltd |
The solder materials of examples 1-4 were prepared.
Example 1
Respectively weighing 60kg of aluminum powder, 8kg of alumina with the granularity of less than 0.088mm, 112kg of alumina with the granularity of 0.088-0.2mm, 320kg of alumina with the granularity of 0.2-0.3mm, 360kg of alumina with the granularity of 0.3-0.5, 50kg of mullite, 70kg of black silicon carbide sand, 12kg of zirconium silicate, 7kg of yttrium oxide and 1kg of titanium diboride, and uniformly mixing and stirring to obtain the welding material 1.
Example 2
100kg of aluminum powder, 30kg of alumina with the granularity of less than 0.088mm, 195kg of alumina with the granularity of 0.088-0.2mm, 225kg of alumina with the granularity of 0.2-0.3mm, 300kg of alumina with the granularity of 0.3-0.5, 68kg of mullite, 60kg of black silicon carbide sand, 10kg of zirconium silicate, 10kg of yttrium oxide and 2kg of titanium diboride are respectively weighed, mixed and stirred uniformly to obtain the welding material 2.
Example 3
113.7kg of aluminum powder, 39kg of alumina with the granularity of less than 0.088mm, 104kg of alumina with the granularity of 0.088-0.2mm, 390kg of alumina with the granularity of 0.2-0.3mm, 117kg of alumina with the granularity of 0.3-0.5, 150kg of mullite, 50kg of black silicon carbide sand, 30kg of zirconium silicate, 5kg of yttrium oxide and 1.3kg of titanium diboride are respectively weighed, mixed and stirred uniformly to obtain the welding material 3.
Example 4
160kg of aluminum powder, 60kg of alumina with the granularity of less than 0.088mm, 168kg of alumina with the granularity of 0.088-0.2mm, 282kg of alumina with the granularity of 0.2-0.3mm, 90kg of alumina with the granularity of 0.3-0.5, 146.2kg of mullite, 100kg of black silicon carbide sand, 22kg of zirconium silicate, 20kg of yttrium oxide and 1.8kg of titanium diboride are respectively weighed, mixed and stirred uniformly to obtain the welding material 4.
Respectively using the welding materials 1-4 in the industrial kilns with the same size damage for repairing, wherein the specific repairing process comprises the following steps:
connecting the soldering machine, respectively communicating an oxygen tank, a nitrogen tank and a water pump with the soldering machine, respectively putting the prepared soldering materials 1-4 into the soldering machine, firstly, starting the oxygen and the water pump, using the oxygen as carrier gas to convey the soldering materials in the soldering machine to a damaged part, keeping the head of the soldering gun at about 15cm away from the damaged part, spraying 30kkg soldering materials, closing the oxygen, stopping spraying the soldering materials, starting the nitrogen, keeping the nozzle of the soldering gun aligned with the damaged part, and spraying the nitrogen for 1-2 min.
And repeating the steps for three times to finish the repair welding repair.
In a specific embodiment, preferably, the damaged part of the kiln to be repaired is firstly subjected to surface treatment, the surface of the refractory brick of the kiln is relatively smooth due to the fact that some glass phase substances may exist on the surface of the refractory brick of the kiln due to the working environment of the kiln, and in order to increase the bonding capacity of the welding material and the surface of the refractory brick, the surface of the refractory brick is firstly subjected to rough treatment, wherein the rough treatment comprises the step of carrying out burning and melting treatment on the surface of the refractory brick in the kiln by using a cleaning material.
And (3) carrying out a performance test on the repaired refractory brick, wherein the test result is as follows:
in the data result, the weld repair rebound rate is the percentage of the welding repair material falling in the welding repair process, and because the control requirements of the produced products in some kilns on impurities are higher, the quality of the products in the whole kiln can be affected if the welding repair material falls too much in the welding repair process. The rebound rate of the conventional welding repair material is generally 30-50% in the welding repair process, and compared with the welding repair material provided by the invention, the welding repair material has lower rebound rate and better adhesion in the welding repair process.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The high-alumina kiln welding material is characterized by comprising the following components in percentage by weight of 100 percent:
2. the high alumina kiln filler material as defined in claim 1, wherein the alumina has a particle size of not more than 0.5 mm.
3. The soldering material for the high alumina kiln as claimed in claim 2, wherein the alumina with the particle size of less than 0.088mm accounts for 1% -10% of the total amount of the alumina, the alumina with the particle size of 0.088-0.2mm accounts for 14% -28% of the total amount of the alumina, the alumina with the particle size of 0.2-0.3mm accounts for 30% -60% of the total amount of the alumina, and the alumina with the particle size of 0.3-0.5mm accounts for 15% -45% of the total amount of the alumina.
4. The high alumina kiln welding material as defined in claim 1, wherein the aluminum powder has a purity of not less than 99% and a particle size of 0.07-0.08 mm.
5. The high alumina kiln filler material as defined in claim 1, wherein the mullite has a particle size of 0.2-0.5 mm.
6. The high alumina kiln welding material as defined in claim 1, wherein the black silicon carbide sand has a particle size of 0.2-0.5 mm.
7. The use method of the high alumina kiln welding material of claim 1, characterized by comprising the following steps:
mixing the raw materials of the high-alumina kiln soldering material according to a mass ratio for later use, preparing a soldering gun, a current-carrying water pump, adding the soldering material into the soldering gun, and connecting the current-carrying water pump and the current-carrying water pump to the soldering gun;
step two, cleaning the surface of the refractory brick to be welded, removing surface impurities, and performing rough treatment on the repaired surface;
thirdly, conveying the current-carrying gas and the welding materials to the damaged part of the surface of the refractory brick to be repaired by using a welding repair gun, and melting the welding materials at the damaged part by using high temperature in the kiln so as to weld the damaged part and the welding materials together;
and step four, repeating the step three until the surface damage of the refractory brick is repaired.
8. The method of using a high alumina kiln repair weld of claim 7, wherein the carrier gas comprises oxygen and nitrogen.
9. The use method of the soldering flux of the high alumina kiln as defined in claim 7, wherein in the third step, the spraying distance of the soldering flux gun is 10-50 cm.
10. The method for using the soldering flux of the high alumina kiln as claimed in claim 7, wherein the amount of the soldering flux sprayed in the third step is 20-40 kg.
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| CN201910628175.XA CN110317989B (en) | 2019-07-11 | 2019-07-11 | High-alumina kiln welding material and using method thereof |
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| CN201910628175.XA CN110317989B (en) | 2019-07-11 | 2019-07-11 | High-alumina kiln welding material and using method thereof |
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| CN110317989B true CN110317989B (en) | 2020-08-04 |
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| CN112010537A (en) * | 2020-08-05 | 2020-12-01 | 武汉重远炉窑工程技术服务有限公司 | Refractory material suitable for glass kiln and preparation method thereof |
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| JP4428805B2 (en) * | 2000-04-20 | 2010-03-10 | 株式会社タンガロイ | Aluminum oxide-containing composite ceramic sintered body and coated composite ceramic sintered body |
| JP2009107865A (en) * | 2007-10-29 | 2009-05-21 | Jfe Refractories Corp | Thermal spraying material |
| CN104788104A (en) * | 2014-01-21 | 2015-07-22 | 上海宝冶建设工业炉工程技术有限公司 | High-alumina ceramic welding material for industrial kiln and furnace repairing, and repairing method thereof |
| CN103833395A (en) * | 2014-02-09 | 2014-06-04 | 山国强 | High-temperature gunning material |
| CN105601303A (en) * | 2015-12-30 | 2016-05-25 | 宜兴市集创新材料科技有限公司 | Mending material of glass furnace |
| CN106977214B (en) * | 2017-04-01 | 2020-12-29 | 海城利尔麦格西塔材料有限公司 | Converter large-surface repairing material and preparation method thereof |
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