CN110228997B - Mullite ceramic welding material - Google Patents
Mullite ceramic welding material Download PDFInfo
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- CN110228997B CN110228997B CN201910628174.5A CN201910628174A CN110228997B CN 110228997 B CN110228997 B CN 110228997B CN 201910628174 A CN201910628174 A CN 201910628174A CN 110228997 B CN110228997 B CN 110228997B
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
- C04B35/101—Refractories from grain sized mixtures
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3418—Silicon oxide, silicic acids or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3427—Silicates other than clay, e.g. water glass
- C04B2235/3463—Alumino-silicates other than clay, e.g. mullite
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/38—Non-oxide ceramic constituents or additives
- C04B2235/3852—Nitrides, e.g. oxynitrides, carbonitrides, oxycarbonitrides, lithium nitride, magnesium nitride
- C04B2235/386—Boron nitrides
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/40—Metallic constituents or additives not added as binding phase
- C04B2235/402—Aluminium
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/52—Constituents or additives characterised by their shapes
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- C04B2235/5216—Inorganic
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
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Abstract
The mullite ceramic welding material provided by the invention has the advantages that the raw materials of the mullite ceramic welding material comprise metal aluminum powder, aluminum oxide particles, mullite sand, black silicon carbide sand, sponge titanium and boron nitride, wherein the purity of the metal aluminum powder is not less than 99%, the aluminum oxide particles are electrofused corundum sand, the granularity of the black silicon carbide sand is 0.5-0.2mm, and the purity of the sponge titanium is not less than 99.7%.
Description
Technical Field
The invention relates to the technical field of glass kiln repair, in particular to a mullite ceramic welding material.
Background
The high-temperature kiln is built by refractory bricks and can resist higher temperature, however, in the using process, the inner wall of the kiln can be damaged due to friction and collision of products and rapid temperature change, even the difference between the products and the acidity and alkalinity of the refractory bricks, and in order to prolong the service life of the coke oven and avoid the shutdown of the coke oven as much as possible, the coke oven needs to be repaired thermally.
At present, the commonly used hot repair means mainly comprise repair welding and wet repair, the wet repair is simpler, but the main application scene is the outer wall of the kiln, to the inner wall of the kiln which is always in a high-temperature environment, the means of repair welding is generally adopted, the repair welding is similar to a metal welding process, the damaged part of the kiln is repaired in a physical melting mode by adopting refractory powder, the melting process can be accompanied with violent chemical reaction, even a large amount of smoke is generated, for the repair welding in the kiln, the sight is shielded by a large amount of smoke, the quality of the repair welding can be affected, and therefore the service life of the kiln is affected.
Disclosure of Invention
In view of the above, the invention provides a mullite ceramic welding material which is not easy to generate smoke.
The technical scheme of the invention is realized as follows: the invention provides a mullite ceramic welding material which comprises the following raw materials in percentage by mass of 100 percent:
on the basis of the technical scheme, preferably, the mullite ceramic welding material comprises the following raw materials in percentage by mass: 10% of metal aluminum powder, 60% of alumina particles, 10% of mullite sand, 10% of black silicon carbide sand, 6% of titanium sponge and 3% of boron nitride.
On the basis of the technical scheme, preferably, the purity of the written aluminum powder is more than or equal to 99%, and the screening mesh number of the metal aluminum powder is not less than 200 meshes.
On the basis of the technical scheme, preferably, the alumina particles are fused corundum sand, and the granularity of the alumina particles is not more than 0.5 mm.
On the basis of the above technical solution, preferably, the alumina particles comprise, by mass percent 100%:
alumina particles with particle size of 0.5-0.3mm 22-38%
35-52% of alumina particles with the particle size of 0.3-0.2mm
Alumina particles with a particle size of 0.2-0.088mm 15-25%
2-8% of alumina particles with the particle size of less than 0.088 mm.
Still more preferably, the mullite sand has a particle size of 0.5 to 0.2 mm.
On the basis of the technical scheme, preferably, the mullite sand is replaced by the flint clay sand.
On the basis of the technical scheme, preferably, the granularity of the black silicon carbide sand is 0.5-0.2 mm.
On the basis of the technical scheme, preferably, the purity of the titanium sponge is more than or equal to 99.7%.
On the basis of the technical scheme, preferably, the boron nitride is cubic boron nitride, and the content of the boron nitride is more than or equal to 99%.
Compared with the prior art, the mullite ceramic welding material has the following beneficial effects:
(1) the mullite ceramic welding material takes the metal aluminum powder, the alumina particles, the mullite sand and the black silicon carbide sand as main raw materials for welding repair, can be suitable for the welding repair of the alkaline refractory bricks, and the addition of the sponge titanium and the boron nitride can effectively solve the problem of overlarge smoke of the welding material containing the aluminum powder in the welding repair process, thereby improving the controllability and the welding repair quality of the welding repair process;
(2) the mullite ceramic welding material is easy to obtain raw materials, low in price and suitable for large-scale popularization and use.
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 |
| Metal aluminium powder | Henan province New aluminum powder contained Co Ltd |
| Alumina particles | Jiangsu Tianxing New Material Co Ltd |
| Mullite sand | Zhoucun research refractory material factory |
| Flint clay sand | Zhoucun research refractory material factory |
| Black silicon carbide sand | Scoring City Fukuai refractory Co Ltd |
| Titanium sponge | Background Xinglong source science and technology Limited |
| Cubic boron nitride | Zhengzhou Jiajie chemical Co Ltd |
The solder materials of examples 1-4 were prepared.
Example 1
Uniformly mixing 2g of metal aluminum powder, 13.2g of fused corundum sand with the granularity of 0.5-0.3mm, 31.2g of fused corundum sand with the granularity of 0.3-0.2mm, 12g of fused corundum sand with the granularity of 0.2-0.088mm, 3.6g of fused corundum sand with the granularity of less than 0.088mm, 15g of mullite sand, 13g of silicon carbide black sand, 6g of sponge titanium and 4g of boron nitride to obtain the first mullite ceramic welding material.
Example 2
Uniformly mixing 15g of metal aluminum powder, 26.6g of fused corundum sand with the granularity of 0.5-0.3mm, 24.5g of fused corundum sand with the granularity of 0.3-0.2mm, 17.5g of fused corundum sand with the granularity of 0.2-0.088mm, 1.4g of fused corundum sand with the granularity of less than 0.088mm, 4g of mullite sand, 9g of black silicon carbide sand, 1g of sponge titanium and 1g of boron nitride to obtain the second mullite ceramic welding material.
Example 3
Uniformly mixing 10g of metal aluminum powder, 15g of fused corundum sand with the granularity of 0.5-0.3mm, 23.5g of fused corundum sand with the granularity of 0.3-0.2mm, 7.5g of fused corundum sand with the granularity of 0.2-0.088mm, 4g of fused corundum sand with the granularity of less than 0.088mm, 11g of flint sand, 15g of silicon carbide black sand, 8g of sponge titanium and 6g of boron nitride to obtain the third mullite ceramic welding material.
Example 4
Uniformly mixing 20g of metal aluminum powder, 15.2g of fused corundum sand with the granularity of 0.5-0.3mm, 23.8g of fused corundum sand with the granularity of 0.3-0.2mm, 12g of fused corundum sand with the granularity of 0.2-0.088mm, 3.2g of fused corundum sand with the granularity of less than 0.088mm, 10g of mullite sand, 10g of silicon carbide black sand, 3g of sponge titanium and 3g of boron nitride to obtain the first mullite ceramic welding material.
The mullite ceramic soldering materials prepared in the embodiments 1 to 4 are respectively used for spray repair of high-temperature kilns with same size and breakage.
The concrete spray repair method comprises the following steps: filling the prepared mullite ceramic welding material into a gunning welding gun, spraying the mullite ceramic welding material to the damaged position in the high-temperature kiln by utilizing carrier gas, wherein the gunning speed is 100-200kg/h, stopping for 2-5min every 30min of gunning, and starting next gunning until the damaged position is repaired.
In the above embodiment, the carrier gas is preferably argon gas.
Observing the visual field definition in the spray repair process, and simultaneously detecting the related indexes of the repaired part, wherein the visual field definition specifically comprises the following steps:
because the metal aluminum powder is influenced by high ballast gas flow during repair welding, the metal aluminum powder is very easy to oxidize to form alumina and form alumina powder dust cloud, thereby forming smoke and blocking the sight of repair welding personnel, and the alumina particles, mullite sand or flint sand and the like which are taken by raw materials are easy to form dust cloud under the action of high-pressure gas, the sponge titanium and the boron nitride are creatively added in the invention, and the sponge titanium and the boron nitride are mutually matched, so that the smoke generated in the spray repair process can be greatly reduced, and the surface performance and the mechanical performance of the repaired refractory brick are greatly enhanced.
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 (8)
1. The mullite ceramic welding material is characterized by comprising the following raw materials in percentage by mass of 100 percent:
the purity of the titanium sponge is more than or equal to 99.7 percent.
2. The mullite ceramic welding material as claimed in claim 1, wherein the purity of the metal aluminum powder is not less than 99%, and the sieve mesh number of the metal aluminum powder is not less than 200 meshes.
3. The mullite ceramic weld filler material of claim 1, wherein the alumina particles are fused corundum sand and the alumina particles have a particle size of not greater than 0.5 mm.
4. The mullite ceramic filler material of claim 3 wherein the alumina particles comprise, in 100 percent by mass:
alumina particles with particle size of 0.5-0.3mm 22-38%
35-52% of alumina particles with the particle size of 0.3-0.2mm
Alumina particles with a particle size of 0.2-0.088mm 15-25%
2-8% of alumina particles with the particle size of less than 0.088 mm.
5. The mullite ceramic weld filler of claim 1 wherein the mullite sand has a particle size of 0.5 to 0.2 mm.
6. The mullite ceramic weld filler material of claim 1 wherein the mullite sand is replaced with flint sand.
7. The mullite ceramic weld filler of claim 1 wherein the black silicon carbide sand has a particle size of 0.5 to 0.2 mm.
8. The mullite ceramic welding material as set forth in claim 1, wherein the boron nitride is cubic boron nitride and the content of boron nitride is not less than 99%.
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| CN201910628174.5A CN110228997B (en) | 2019-07-11 | 2019-07-11 | Mullite ceramic welding material |
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| CN201910628174.5A CN110228997B (en) | 2019-07-11 | 2019-07-11 | Mullite ceramic welding material |
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| CN110228997B true CN110228997B (en) | 2021-08-20 |
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