CN102249706B - Application method of high-temperature ceramic soldering material in the nature of magnesium and chromium - Google Patents
Application method of high-temperature ceramic soldering material in the nature of magnesium and chromium Download PDFInfo
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Abstract
The invention provides an application method of a high-temperature ceramic soldering material in the nature of magnesium and chromium. Comprising 44-46 wt% of MgO, 14-16 wt% of Cr2O3, 24-27 wt% of Al2O3 and 14-16 wt% of CaO, the high-temperature ceramic soldering material in the nature of magnesium and chromium is sprayed from a welding gun to the damaged part of an industrial kiln under the current carrying effect of a combustion-supporting gas. At the damaged part, fuel particles in the soldering material burn to generate high temperature for softening and fusing refractory material particles of the soldering material and the refractory material at the damaged part, so that the damaged part and the refractory material of the soldering material can be welded together firmly, thus reaching the purpose of restoring the kiln. In the invention, the high-temperature ceramic soldering material in the nature of magnesium and chromium provides a solution to the problem that present high-temperature ceramic soldering materials in the nature of silicon and zirconium mullite are unable to solder and repair kilns constructed with magnesium refractory materials. Meanwhile, the service life of industrial kilns is prolonged, the use cost of industrial kilns is reduced, and the loss resulted from industrial kiln damage is cut. Therefore, the method provided in the invention is suitable for large scale promotion and application.
Description
Technical field
The present invention relates to technical field of industrial furnaces, more specifically, relate to Industrial Stoves repairing technique field, refer to especially a kind of using method of the magnesium chromium matter high-temperature ceramic soldering material of repairing for glass furnace, sleeve lime kiln, RH external refining.
Background technology
At present, various Industrial Stoves have been brought into play fundamental role in industries such as iron and steel, glass, lime.But various Industrial Stoves are under arms after a period of time, and damage in various degree can appear in the furnace lining that is made of refractory material, directly have influence on thus the life-span of stove.Especially local larger damage conventional is built by laying bricks or stones because adopting, the method such as spraying keeps in repair, thereby causes stove to be forced to stop production, and causes huge economic loss.
The high-temperature ceramic soldering technology is the method that kiln is keeped in repair in a kind of brand-new online not blowing out, progressively applies in various kilns.The mixture that the high-temperature ceramic soldering material of having invented is comprised of fire resisting material particle and fuel particle, high-temperature ceramic soldering material sprays to the scorching hot scope of operation from welding gun under the effect of combustion-supporting gas current-carrying, the fuel particle reactive combustion produces high temperature on this face, fire resisting material particle and the softening melting of the refractory material that is sprayed the surface with ejection, thereby make scope of operation refractory brick with refractory powder securely " weldering " reach the purpose of repairing the stove liner together.
But, because the material of unlike material can produce different change in volume in the applied at elevated temperature process of reality, cause the unstable of structure, select identical or close material to carry out Repair Welding so require high-temperature ceramic soldering to use, can guarantee that just the soldering result is reliable for a long time.
That glass furnace mainly uses is siliceous, Zirconium corundum and magnesia refractories are constructed and formed.At present, siliceous high-temperature ceramic soldering material is used at glass furnace and is reached its maturity, and zirconium mullite matter high-temperature ceramic soldering material has also begun to use.Recent years, the various kilns such as glass furnace, sleeve lime kiln, RH external refining use various magnesia refractories more and more widely, and use magnesium chromium matter high-temperature ceramic soldering material the various kiln reparations such as glass furnace, sleeve lime kiln, RH external refining to be there is not yet the open report of application success.
Summary of the invention
Main purpose of the present invention is exactly the problems and shortcomings for above existence, a kind of using method of magnesium chromium matter high-temperature ceramic soldering material is provided, the magnesium chromium matter high-temperature ceramic soldering material of its use has solved the difficult problem that existing siliceous, zirconium mullite matter high-temperature ceramic soldering material can't soldering maintenance magnesia refractories be built the stove of formation by laying bricks or stones, prolonged the service life of industrial furnace, reduced the use cost of industrial furnace, minimizing is suitable for large-scale promotion application because of the loss that the industrial furnace breakage brings.
In order to solve above-mentioned purpose, the using method of magnesium chromium matter high-temperature ceramic soldering material of the present invention is characterized in, described magnesium chromium matter high-temperature ceramic soldering material comprises the Cr of the MgO, 14～16% (weight) of 44～46% (weight)
2O
3, 24～27% (weight) Al
2O
3CaO with 14～16% (weight), described magnesium chromium matter high-temperature ceramic soldering material sprays to the breakage of Industrial Stoves from welding gun under the effect of combustion-supporting gas current-carrying, fuel particle burning at the described magnesium chromium of this breakage matter high-temperature ceramic soldering material produces high temperature, the fire resisting material particle of described magnesium chromium matter high-temperature ceramic soldering material and the refractory material of this breakage are softened melting, thereby this breakage is welded together securely with the refractory material of described magnesium chromium matter high-temperature ceramic soldering material, reach the purpose of repairing stove.
Preferably, the output quantity of described magnesium chromium matter high-temperature ceramic soldering material is 100～250 kg/hours; The flow of described combustion-supporting gas is 15～30 cubes of meter per seconds; Described welding gun is 10～45 centimetres to the soldering distance of described breakage, and described welding gun is 60～120 degree with respect to the soldering angle of described Industrial Stoves inwall.
Preferably, described combustion-supporting gas is oxygen, and described welding gun is water-cooled soldering rifle.
Preferably, described MgO is 44% (weight), described Cr
2O
3Be 15% (weight), described Al
2O
3Be 27% (weight), described CaO is 14% (weight); Perhaps, described MgO is 45% (weight), described Cr
2O
3Be 14% (weight), described Al
2O
3Be 25% (weight), described CaO is 16% (weight); Perhaps, described MgO is 46% (weight), described Cr
2O
3Be 16% (weight), described Al
2O
3Be 24% (weight), described CaO is 14% (weight).
Preferably, described MgO comes from one or more of fused magnesite, conite, magnesia chrome spinel and calcium magnesite, described Cr
2O
3Come from one or more of fine chrome mine, chromite, magnesia chrome spinel and pink fused alumina, described Al
2O
3Come from one or more of metallic aluminium powder and pink fused alumina, described CaO comes from one or more of conite, calcium magnesite and fused magnesite.
More preferably, described fused magnesite is 20～21% (weight), described conite is 11～12% (weight), described magnesia chrome spinel is 10～11% (weight), described calcium magnesite is 25～26% (weight), and described fine chrome mine is 9～10% (weight), and described chromite is 3～4% (weight), described pink fused alumina is 5～6% (weight), and described metallic aluminium powder is 12～15% (weight).
More preferably, described fused magnesite is 20% (weight), described conite is 11% (weight), described magnesia chrome spinel is 10% (weight), described calcium magnesite is 25% (weight), and described fine chrome mine is 9% (weight), and described chromite is 3% (weight), described pink fused alumina is 5% (weight), and described metallic aluminium powder is 12% (weight).
More preferably, described fused magnesite is 20% (weight), described conite is 11% (weight), described magnesia chrome spinel is 10% (weight), described calcium magnesite is 25% (weight), and described fine chrome mine is 10% (weight), and described chromite is 4% (weight), described pink fused alumina is 6% (weight), and described metallic aluminium powder is 13% (weight).
More preferably, described fused magnesite is 21% (weight), described conite is 11% (weight), described magnesia chrome spinel is 10% (weight), described calcium magnesite is 25% (weight), and described fine chrome mine is 9% (weight), and described chromite is 3% (weight), described pink fused alumina is 5% (weight), and described metallic aluminium powder is 15% (weight).
More preferably, described fused magnesite is 20% (weight), described conite is 12% (weight), described magnesia chrome spinel is 11% (weight), described calcium magnesite is 26% (weight), and described fine chrome mine is 9% (weight), and described chromite is 4% (weight), described pink fused alumina is 5% (weight), and described metallic aluminium powder is 12% (weight).
The compound method of above-mentioned magnesium chromium matter high-temperature ceramic soldering material is the Cr with the MgO, 14～16% (weight) of 44～46% (weight)
2O
3, 24～27% (weight) Al
2O
3Mix with the CaO of 14～16% (weight) and to form.
Beneficial effect of the present invention is:
1, the magnesium chromium matter high-temperature ceramic soldering material of the using method of magnesium chromium matter high-temperature ceramic soldering material of the present invention use comprises the Cr of the MgO, 14～16% (weight) of 44～46% (weight)
2O
3, 24～27% (weight) Al
2O
3CaO with 14～16% (weight), solve existing siliceous, zirconium mullite matter high-temperature ceramic soldering material and can't soldering maintenance magnesia refractories have built the difficult problem of the stove of formation by laying bricks or stones, prolonged the service life of industrial furnace, reduced the use cost of industrial furnace, minimizing is suitable for large-scale promotion application because of the loss that the industrial furnace breakage brings.
2, the described MgO of the magnesium chromium matter high-temperature ceramic soldering material of the present invention's employing comes from one or more of fused magnesite, conite, magnesia chrome spinel and calcium magnesite, described Cr
2O
3Come from one or more of fine chrome mine, chromite, magnesia chrome spinel and pink fused alumina, described Al
2O
3Come from one or more of metallic aluminium powder and pink fused alumina, described CaO comes from one or more of conite, calcium magnesite and fused magnesite, and raw material is easy to get, and preparation is simple, is suitable for large-scale promotion application.
3, the output quantity of the magnesium chromium matter high-temperature ceramic soldering material of using method employing of the present invention is 100～250 kg/hours; Combustion-supporting gas is oxygen, and flow is 15～30 cubes of meter per seconds; Can guarantee the refractory material at magnesium chromium matter high-temperature ceramic soldering material and required reparation position is melted to optimum state.Both guarantee the intensity of soldering body self, guaranteed again that the Repair Welding body was firm with the refractory material bonding of repairing the position, can also reduce most possibly spillage of material, be suitable for large-scale promotion application.
4, the welding gun of using method employing of the present invention to the soldering distance of described breakage is 10～45 centimetres, welding gun is 60～120 degree with respect to the soldering angle of Industrial Stoves inwall, can guarantee will ejection magnesium chromium matter high-temperature ceramic soldering material be ejected into as much as possible the position of need repairing, reduce as much as possible resilience and splash.Both guaranteed the peak use rate of magnesium chromium matter high-temperature ceramic soldering material, the impact that has reduced to greatest extent resilience and splashed glass production is brought again.
The specific embodiment
In order more clearly to understand technology contents of the present invention, describe in detail especially exemplified by following examples.The raw material that adopts in the following example following (wt% of unit):
The preparation of embodiment 1 magnesium chromium matter high-temperature ceramic soldering material
Fused magnesite with 20% (weight), the conite of 11% (weight), the magnesia chrome spinel of 10% (weight), the calcium magnesite of 25% (weight), the fine chrome mine of 9% (weight), the chromite of 3% (weight), the pink fused alumina of 5% (weight), the metallic aluminium powder mixing and stirring of 12% (weight) becomes magnesium chromium matter high-temperature ceramic soldering material 1.
Fused magnesite with 20% (weight), the conite of 11% (weight), the magnesia chrome spinel of 10% (weight), the calcium magnesite of 25% (weight), the fine chrome mine of 10% (weight), the chromite of 4% (weight), the pink fused alumina of 6% (weight), the metallic aluminium powder mixing and stirring of 13% (weight) becomes magnesium chromium matter high-temperature ceramic soldering material 2.
Fused magnesite with 21% (weight), the conite of 11% (weight), the magnesia chrome spinel of 10% (weight), the calcium magnesite of 25% (weight), the fine chrome mine of 9% (weight), the chromite of 3% (weight), the pink fused alumina of 5% (weight), the metallic aluminium powder mixing and stirring of 15% (weight) becomes magnesium chromium matter high-temperature ceramic soldering material 3.
Fused magnesite with 20% (weight), the conite of 12% (weight), the magnesia chrome spinel of 11% (weight), the calcium magnesite of 26% (weight), the fine chrome mine of 9% (weight), the chromite of 4% (weight), the pink fused alumina of 5 % (weight), the metallic aluminium powder mixing and stirring of 12% (weight) becomes magnesium chromium matter high-temperature ceramic soldering material 4.
Embodiment 2 magnesium chromium matter high-temperature ceramic soldering materials are repaired test
The magnesium chromium matter high-temperature ceramic soldering material 1-4 of embodiment 1 preparation is repaired the industrial furnace with formed objects breakage respectively, mending course is as follows: the magnesium chromium matter high-temperature ceramic soldering material for preparing sprays to the breakage of Industrial Stoves from welding gun under the effect of combustion-supporting gas oxygen current-carrying, the technological parameter that adopts is as shown in table 1, fuel particle burning at the described magnesium chromium of this breakage matter high-temperature ceramic soldering material produces high temperature, the fire resisting material particle of described magnesium chromium matter high-temperature ceramic soldering material and the refractory material of this breakage are softened melting, thereby this breakage is welded together securely with the refractory material of described magnesium chromium matter high-temperature ceramic soldering material, reach the purpose of repairing stove.Through measuring, the listed index of table 2 is all satisfied in the repair place:
Table 1
| Title | Unit | The 1st group of parameter | The 2nd group of parameter | The 3rd group of parameter |
| The soldering material output quantity | Kg/hour | ?100 | ?200 | ?250 |
| Oxygen flow | Cube meter per second (standard state) | ?15 | ?20 | ?30 |
| The soldering distance | Centimetre | ?10 | ?25 | ?45 |
| The soldering angle | Degree | ?60 | ?90 | ?120 |
Table 2
The present invention is connected to welding repair machine with the magnesium chromium matter high-temperature ceramic soldering material special-purpose welding repair machine of packing into oxygen.Regulate soldering material output quantity and oxygen flow, be in the optimum range to guarantee technological parameter.Special water cooling soldering rifle is stretched into stove inside, and arrive the position that needs reparation, soldering distance and the soldering angle of regulating water-cooled soldering rifle are in the optimum range to guarantee technological parameter.Open welding repair machine, the beginning soldering, and in welding repair process, according to actual soldering situation, regulate each technological parameter, to guarantee best quality of welding repair.When the process for welding repair parameter is adjusted to optimum state, can either guarantee that quality of welding repair reaches optimum efficiency, can reduce most possibly again the impact on producing.
Owing to by four kinds of MgO compositions that raw material is contributed such as fused magnesite, conite, magnesia chrome spinel, calcium magnesites, can resist the erosion of alkaline atmosphere; The Cr that is contributed by raw materials such as fine chrome mine, chromite, magnesia chrome spinel, pink fused aluminas
2O
3At high temperature can form Spinel with the MgO after chemical reaction, add the magnesia chrome spinel of direct adding, can resist the high temperature that fuel combustion brings.Since metallic aluminium powder at high temperature with oxygen reaction, send a large amount of heat, with the fire resisting material particle of ejection with sprayed the softening melting of refractory material on surface, " weldering " together securely with refractory powder thereby make scope of operation refractory brick.So the magnesium chromium matter high-temperature ceramic soldering material of invention can be in glass furnace, sleeve lime kiln, the RH external refining application of succeeding.
Because by four kinds of MgO compositions that raw material is contributed such as fused magnesite, conite, magnesia chrome spinel, calcium magnesites, the Cr that is contributed by raw materials such as fine chrome mine, chromite, magnesia chrome spinel, pink fused aluminas
2O
3Composition, both at high temperature can after chemical reaction form the magnesia chrome spinel phase, and the magnesia chrome spinel that directly adds is as the nucleus of newly-generated magnesia chrome spinel growth, can make this chemical reaction more fast, more thorough.
Be MgO and Cr from chemical composition
2O
3Angle, the high-temperature ceramic soldering material of invention can be called magnesium chromium matter high-temperature ceramic soldering material.Be the magnesia chrome spinel angle from the main mine phase, the high-temperature ceramic soldering material of invention also can be called magnesia chrome spinel matter high-temperature ceramic soldering material.
In sum, the magnesium chromium matter high-temperature ceramic soldering material that the using method of magnesium chromium matter high-temperature ceramic soldering material of the present invention adopts has solved the difficult problem that existing siliceous, zirconium mullite matter high-temperature ceramic soldering material can't soldering maintenance magnesia refractories be built the stove of formation by laying bricks or stones, prolonged the service life of industrial furnace, reduced the use cost of industrial furnace, minimizing is suitable for large-scale promotion application because of the loss that the industrial furnace breakage brings.
In this specification, the present invention is described with reference to its specific embodiment.But, still can make various modifications and conversion obviously and not deviate from the spirit and scope of the present invention.Therefore, specification is regarded in an illustrative, rather than a restrictive.
Claims (10)
1. the using method of a magnesium chromium matter high-temperature ceramic soldering material is characterized in that, described magnesium chromium matter high-temperature ceramic soldering material comprises 44～46%(weight) MgO, 14～16%(weight) Cr
2O
3, 24～27%(weight) Al
2O
3With 14～16%(weight) CaO, described magnesium chromium matter high-temperature ceramic soldering material sprays to the breakage of Industrial Stoves from welding gun under the effect of combustion-supporting gas current-carrying, fuel particle burning at the described magnesium chromium of this breakage matter high-temperature ceramic soldering material produces high temperature, the fire resisting material particle of described magnesium chromium matter high-temperature ceramic soldering material and the refractory material of this breakage are softened melting, thereby this breakage is welded together securely with the refractory material of described magnesium chromium matter high-temperature ceramic soldering material, reach the purpose of repairing stove.
2. using method according to claim 1 is characterized in that, the output quantity of described magnesium chromium matter high-temperature ceramic soldering material is 100 ~ 250 kg/hours; The flow of described combustion-supporting gas is 15 ~ 30 cubes of meter per seconds; Described welding gun is 10 ~ 45 centimetres to the soldering distance of described breakage, and described welding gun is 60 ~ 120 degree with respect to the soldering angle of described Industrial Stoves inwall.
3. using method according to claim 1 is characterized in that, described combustion-supporting gas is oxygen, and described welding gun is water-cooled soldering rifle.
4. using method according to claim 1 is characterized in that, described MgO is 44%(weight), described Cr
2O
3Be 15%(weight), described Al
2O
3Be 27%(weight), described CaO is 14%(weight); Perhaps, described MgO is 45%(weight), described Cr
2O
3Be 14%(weight), described Al
2O
3Be 25%(weight), described CaO is 16%(weight); Perhaps, described MgO is 46%(weight), described Cr
2O
3Be 16%(weight), described Al
2O
3Be 24%(weight), described CaO is 14%(weight).
5. using method according to claim 1 is characterized in that, described MgO comes from one or more of fused magnesite, conite, magnesia chrome spinel and calcium magnesite, described Cr
2O
3Come from one or more of fine chrome mine, chromite, magnesia chrome spinel and pink fused alumina, described Al
2O
3Come from one or more of metallic aluminium powder and pink fused alumina, described CaO comes from one or more of conite, calcium magnesite and fused magnesite.
6. using method according to claim 5, it is characterized in that, the raw material of described magnesium chromium matter high-temperature ceramic soldering material comprises: fused magnesite is 20～21%(weight), conite is 11～12%(weight), magnesia chrome spinel is 10～11%(weight), calcium magnesite is 25～26%(weight), fine chrome mine is 9～10%(weight), chromite is 3～4%(weight), pink fused alumina is 5～6%(weight), metallic aluminium powder is 12～15%(weight).
7. using method according to claim 6, it is characterized in that, the raw material of described magnesium chromium matter high-temperature ceramic soldering material comprises: fused magnesite is 20%(weight), conite is 11%(weight), magnesia chrome spinel is 10%(weight), calcium magnesite is 25%(weight), fine chrome mine is 9%(weight), chromite is 3%(weight), pink fused alumina is 5%(weight), metallic aluminium powder is 12%(weight).
8. using method according to claim 6, it is characterized in that, the raw material of described magnesium chromium matter high-temperature ceramic soldering material comprises: fused magnesite is 20%(weight), conite is 11%(weight), magnesia chrome spinel is 10%(weight), calcium magnesite is 25%(weight), fine chrome mine is 10%(weight), chromite is 4%(weight), pink fused alumina is 6%(weight), metallic aluminium powder is 13%(weight).
9. using method according to claim 6, it is characterized in that, the raw material of described magnesium chromium matter high-temperature ceramic soldering material comprises: fused magnesite is 21%(weight), conite is 11%(weight), magnesia chrome spinel is 10%(weight), calcium magnesite is 25%(weight), fine chrome mine is 9%(weight), chromite is 3%(weight), pink fused alumina is 5%(weight), metallic aluminium powder is 15%(weight).
10. using method according to claim 6, it is characterized in that, the raw material of described magnesium chromium matter high-temperature ceramic soldering material comprises: fused magnesite is 20%(weight), conite is 12%(weight), magnesia chrome spinel is 11%(weight), calcium magnesite is 26%(weight), fine chrome mine is 9%(weight), chromite is 4%(weight), pink fused alumina is 5%(weight), metallic aluminium powder is 12%(weight).
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| CN101234905A (en) * | 2008-03-07 | 2008-08-06 | 宜兴市东坡耐火材料有限公司 | Corundum spinel refractory materials for RH lining and manufacturing method thereof |
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| CN1404958A (en) * | 2001-09-17 | 2003-03-26 | 宝山钢铁股份有限公司 | Sintering-flux for build-up welding of continuous casting roller and production method thereof |
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