CN111039684A - Furnace lining gap repairing material and repairing method of furnace lining gap - Google Patents

Furnace lining gap repairing material and repairing method of furnace lining gap Download PDF

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Publication number
CN111039684A
CN111039684A CN201911405096.9A CN201911405096A CN111039684A CN 111039684 A CN111039684 A CN 111039684A CN 201911405096 A CN201911405096 A CN 201911405096A CN 111039684 A CN111039684 A CN 111039684A
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fiber
furnace lining
powder
lining gap
gap
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许妹华
任德利
柳西河
李桂娟
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Luyang Energy Saving Materials Co Ltd
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Luyang Energy Saving Materials Co Ltd
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    • C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
    • 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
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
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    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
    • F27D2001/1605—Repairing linings

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  • Furnace Housings, Linings, Walls, And Ceilings (AREA)

Abstract

The invention belongs to the field of furnace lining repair, and particularly relates to a furnace lining gap repair material and a furnace lining gap repair method. The furnace lining gap repairing material provided by the invention comprises the following components: 25-40 wt% of inorganic fiber, 2-10 wt% of expansion filler, 2-15 wt% of refractory powder, 10-20 wt% of binder and 30-60 wt% of solvent; the inorganic fiber comprises one or more of glass fiber, rock wool fiber, aluminum silicate fiber, magnesium silicate fiber, calcium silicate fiber, zirconium-containing fiber and alumina fiber; the expanded filler comprises one or more of expanded perlite powder, expanded vermiculite powder, expanded cyanite powder and sillimanite powder. The invention optimally designs the component composition of the furnace lining gap repairing material, particularly matches and selects the inorganic fiber and the expansion filler with proper types and dosage, so that the repairing material can show excellent furnace lining gap repairing effect, and the service life of the furnace lining is effectively prolonged.

Description

Furnace lining gap repairing material and repairing method of furnace lining gap
Technical Field
The invention belongs to the field of furnace lining repair, and particularly relates to a furnace lining gap repair material and a furnace lining gap repair method.
Background
Because the high temperature furnace has higher working temperature, expansion joints with certain width are reserved on the furnace lining of the high temperature furnace and are used as allowance of the furnace lining material for expansion with heat and contraction with cold. In addition, since the high temperature furnace has a high operating temperature and a severe atmosphere, irregular cracks are likely to occur in the lining. Whether the expansion joint or the damaged crack exists, if the crack is not repaired, the temperature in the furnace can be influenced, and meanwhile, the temperature of the area of the outer wall of the furnace corresponding to the furnace lining gap is overhigh, and the service life of the high-temperature furnace is influenced.
At present, the repair schemes of furnace lining gaps mainly comprise two schemes: one is to use high temperature resistant coating or adhesive to plug the seam, but because the cured seam has larger rigidity and no elasticity, unnecessary damage of the furnace lining can be caused under the condition that the high temperature seam shrinks, thereby aggravating the damage condition of the furnace lining; and the other is that the seams are plugged by using fiber blankets, and the fiber blankets have poor strength although good elasticity, and are easy to be broken in the process of heat shrinkage and cold expansion of the gaps of the furnace lining. Therefore, the development of the furnace lining gap repairing material with good repairing effect on the furnace lining gap is necessary.
Disclosure of Invention
In view of the above, the present invention aims to provide a furnace lining gap repairing material and a furnace lining gap repairing method, and the furnace lining gap repairing material provided by the present invention has an excellent repairing effect on the furnace lining gap and can effectively prolong the service life of the furnace lining.
The invention provides a furnace lining gap repairing material which comprises the following components in percentage by weight:
Figure BDA0002348414960000011
Figure BDA0002348414960000021
the inorganic fiber comprises one or more of glass fiber, rock wool fiber, aluminum silicate fiber, magnesium silicate fiber, calcium silicate fiber, zirconium-containing fiber and alumina fiber;
the expanded filler comprises one or more of expanded perlite powder, expanded vermiculite powder, expanded cyanite powder and sillimanite powder.
Preferably, the fiber diameter of the inorganic fiber is 1-10 μm, and the fiber length is 1-10 mm.
Preferably, the volume expansion factor of the expanded filler is greater than 0.5.
Preferably, the refractory powder material comprises one or more of corundum powder, zircon powder, kaolin powder and clay clinker powder.
Preferably, the particle size of the refractory powder is 200-500 meshes.
Preferably, the binder includes an inorganic binder and an organic binder;
the inorganic binder comprises one or more of water glass, liquid silica gel, liquid aluminum gel and aluminum dihydrogen phosphate;
the organic binder comprises one or more of cellulose, starch, dextrin and xanthan gum.
Preferably, the mass ratio of the inorganic binder to the organic binder is (4-10): 1.
preferably, the solvent is water.
Preferably, the paint comprises the following components in percentage by weight:
Figure BDA0002348414960000022
the invention provides a repairing method of a furnace lining gap, which comprises the following steps:
cleaning the gaps of the furnace lining, and filling the gaps of the furnace lining with the furnace lining gap repairing material in the technical scheme.
Compared with the prior art, the invention provides a furnace lining gap repairing material and a furnace lining gap repairing method. The furnace lining gap repairing material provided by the invention comprises the following components: 25-40 wt% of inorganic fiber, 2-10 wt% of expansion filler, 2-15 wt% of refractory powder, 10-20 wt% of binder and 30-60 wt% of solvent; the inorganic fiber comprises one or more of glass fiber, rock wool fiber, aluminum silicate fiber, magnesium silicate fiber, calcium silicate fiber, zirconium-containing fiber and alumina fiber; the expanded filler comprises one or more of expanded perlite powder, expanded vermiculite powder, expanded cyanite powder and sillimanite powder. The invention can keep certain elasticity and certain integral strength of the furnace lining gap repairing material in a high-temperature environment by optimally designing the component composition of the furnace lining gap repairing material, particularly matching and selecting the inorganic fiber and the expansion filler with proper types and dosage. Therefore, the filling agent is filled in a furnace lining gap, so that the heat-shrinkage and cold-expansion characteristics of the furnace lining gap can be well met, and the secondary damage to the furnace lining is effectively avoided; meanwhile, the method can resist the severe working environment in the high-temperature furnace and maintain the long-term stability of the modification effect. In addition, the lining gap repairing material provided by the invention also has certain fluidity, so that the lining gap repairing material can be constructed in a pouring mode and is very suitable for deep repairing of gaps.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a furnace lining gap repairing material which comprises the following components in percentage by weight:
Figure BDA0002348414960000031
the inorganic fiber comprises one or more of glass fiber, rock wool fiber, aluminum silicate fiber, magnesium silicate fiber, calcium silicate fiber, zirconium fiber and alumina fiber;
the expansion filler comprises one or more of expanded perlite powder, expanded vermiculite powder, expandable sapphire powder and sillimanite powder.
The furnace lining gap repairing material provided by the invention comprises inorganic fibers, an expansion filler, refractory powder, a bonding agent and a solvent. Wherein the inorganic fiber comprises glass fiber, rock wool fiber, aluminum silicate fiber and magnesium silicate fiberOne or more of calcium silicate fibers, zirconium-containing fibers, and alumina fibers; al in the aluminum silicate fiber2O3The content of Al in the aluminum silicate fiber is preferably more than or equal to 50wt percent2O3And SiO2The total content is preferably not less than 98 wt%; al in the zirconium-containing fiber2O3The content is preferably not less than 42 wt%, and ZrO in the zirconium-containing fiber2The content is preferably more than or equal to 14 wt%; al of the alumina fiber2O3The content is preferably 70 wt% or more. In the present invention, the fiber diameter of the inorganic fiber is preferably 1 to 10 μm, and specifically may be 1 μm, 1.5 μm, 2 μm, 2.5 μm, 3 μm, 3.5 μm, 4 μm, 4.5 μm, 5 μm, 5.5 μm, 6 μm, 6.5 μm, 7 μm, 7.5 μm, 8 μm, 8.5 μm, 9 μm, 9.5 μm, or 10 μm; the fiber length of the inorganic fiber is preferably 1-10 mm, and specifically can be 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm or 10 mm. In the invention, the content of the inorganic fiber in the lining gap repair material is preferably 25-40 wt%, and specifically may be 25 wt%, 25.5 wt%, 26 wt%, 26.5 wt%, 27 wt%, 27.5 wt%, 28 wt%, 28.5 wt%, 29 wt%, 29.5 wt%, 30 wt%, 30.5 wt%, 31 wt%, 31.5 wt%, 32 wt%, 32.5 wt%, 33 wt%, 33.5 wt%, 34 wt%, 34.5 wt%, 35 wt%, 35.5 wt%, 36 wt%, 36.5 wt%, 37 wt%, 37.5 wt%, 38 wt%, 38.5 wt%, 39 wt%, 39.5 wt%, or 40 wt%.
In the invention, the expansion filler comprises one or more of expanded perlite powder, expanded vermiculite powder, expanded cyanite powder and sillimanite powder. Wherein the maximum value of the expanded perlite powder passing through a sieve with 5mm sieve pores is preferably 0.5-5 wt%, and specifically can be 0.5 wt%, 1 wt%, 1.5 wt%, 2 wt%, 2.5 wt%, 3 wt%, 3.5 wt%, 4 wt%, 4.5 wt% or 5 wt%. The density of the expanded vermiculite powder is preferably 2-3 g/cm3Specifically, it may be 2g/cm3、2.1g/cm3、2.2g/cm3、2.3g/cm3、2.4g/cm3、2.5g/cm3、2.6g/cm3、2.7g/cm3、2.8g/cm3、2.9g/cm3Or 3g/cm3(ii) a What is needed isThe particle size of the expanded vermiculite powder is preferably less than or equal to 1 mm. Al in the expanded sapphire powder2O3The content is preferably 60 to 70 wt%, specifically 60 wt%, 61 wt%, 62 wt%, 63 wt%, 63.1 wt%, 64 wt%, 65 wt%, 66 wt%, 67 wt%, 68 wt%, 69 wt% or 70 wt%, and the balance is SiO2(ii) a The particle size of the expanded cyanite powder is preferably larger than or equal to 200 meshes. In the present invention, the volume expansion ratio of the expanded filler is preferably > 0.5 times, more preferably 0.5 to 5 times, and specifically may be 0.5 times, 1 time, 1.5 times, 2 times, 2.5 times, 3 times, 3.5 times, 4 times, 4.5 times, or 5 times. In the invention, the content of the expansion filler in the furnace lining gap repair material is preferably 2-10 wt%, and specifically may be 2 wt%, 2.5 wt%, 3 wt%, 3.5 wt%, 4 wt%, 4.5 wt%, 5 wt%, 5.5 wt%, 6 wt%, 6.5 wt%, 7 wt%, 7.5 wt%, 8 wt%, 8.5 wt%, 9 wt%, 9.5 wt% or 10 wt%.
In the present invention, the refractory powder preferably includes one or more of corundum powder, zircon powder, kaolin powder and clay clinker powder. Wherein Al in the corundum powder2O3The content is preferably 95 wt.% or more, more preferably 97 wt.% or more; ZrO in the zircon powder2The content is preferably 60 wt% or more, more preferably 64 wt% or more; al in the kaolin powder2O3The content is preferably not less than 40 wt%, more preferably not less than 45 wt%; al in the clay clinker powder2O3The content is preferably not less than 25 wt%, more preferably not less than 30 wt%. In the present invention, the particle size of the refractory powder is preferably 200 to 500 mesh, and specifically may be 200 mesh, 250 mesh, 300 mesh, 350 mesh, 400 mesh, 450 mesh or 500 mesh. In the present invention, the content of the refractory powder in the lining gap repair material is preferably 2 to 15 wt%, and specifically may be 2 wt%, 2.5 wt%, 3 wt%, 3.5 wt%, 4 wt%, 4.5 wt%, 5 wt%, 5.5 wt%, 6 wt%, 6.5 wt%, 7 wt%, 7.5 wt%, 8 wt%, 8.5 wt%, 9 wt%, 9.5 wt%, 10 wt%, 10.5 wt%, 11 wt%, 11.5 wt%, 12 wt%, 12.5 wt%, 13 wt%, 13.5 wt%, 14 wt%, 14.5 wt%, or 15 wt%.
In the present invention, the binder preferably includes an inorganic binder and an organic binder. Wherein the inorganic bonding agent comprises but is not limited to one or more of water glass, liquid silica gel, liquid aluminum gel and aluminum dihydrogen phosphate, and the specific gravity of the water glass is preferably more than or equal to 1.2; the organic binding agent comprises one or more of cellulose, starch, dextrin and xanthan gum, wherein the number average molecular weight of the cellulose is 5-12 ten thousand, and specifically can be 5 ten thousand, 5.5 ten thousand, 6 ten thousand, 6.5 ten thousand, 7 ten thousand, 7.5 ten thousand, 8 ten thousand, 8.5 ten thousand, 9 ten thousand, 9.5 ten thousand, 10 ten thousand, 10.5 ten thousand, 11 ten thousand, 11.5 ten thousand or 12 ten thousand. In the invention, the mass ratio of the inorganic binder to the organic binder is preferably (4-10): 1, specifically 4:1, 4.5:1, 5:1, 5.5:1, 6:1, 6.5:1, 7:1, 7.5:1, 8:1, 8.5:1, 9:1, 9.5:1 or 10: 1. In the invention, the content of the bonding agent in the furnace lining gap repair material is preferably 10-20 wt%, and specifically may be 10 wt%, 10.5 wt%, 11 wt%, 11.5 wt%, 12 wt%, 12.5 wt%, 13 wt%, 13.5 wt%, 14 wt%, 14.5 wt%, 15 wt%, 15.5 wt%, 16 wt%, 16.5 wt%, 17 wt%, 17.5 wt%, 18 wt%, 18.5 wt%, 19 wt%, 19.5 wt% or 20 wt%. In an embodiment provided by the invention, the content of the inorganic binder in the furnace lining gap repair material is preferably 10-15 wt%, and specifically may be 10 wt%, 10.5 wt%, 11 wt%, 11.5 wt%, 12 wt%, 12.5 wt%, 13 wt%, 13.5 wt%, 14 wt%, 14.5 wt%, 15 wt%; the content of the organic binder in the furnace lining gap repair material is preferably 1-3 wt%, and specifically can be 1 wt%, 1.5 wt%, 2 wt%, 2.5 wt% or 3 wt%.
In the present invention, the solvent is preferably water; the content of the solvent in the furnace lining gap repair material is preferably 30-60 wt%, and specifically may be 30 wt%, 31 wt%, 32 wt%, 33 wt%, 34 wt%, 35 wt%, 36 wt%, 37 wt%, 38 wt%, 39 wt%, 40 wt%, 41 wt%, 42 wt%, 43 wt%, 44 wt%, 45 wt%, 46 wt%, 47 wt%, 48 wt%, 49 wt%, 50 wt%, 51 wt%, 52 wt%, 53 wt%, 54 wt%, 55 wt%, 56 wt%, 57 wt%, 58 wt%, 59 wt%, or 60 wt%. In one embodiment provided by the invention, the content of the solvent in the lining gap repair material is the balance.
In the invention, the wet volume weight of the furnace lining gap repairing material is preferably 800-1500kg/m3Specifically, it may be 800kg/m3、850kg/m3、900kg/m3、950kg/m3、1000kg/m3、1050kg/m3、1100kg/m3、1150kg/m3、1200kg/m3、1250kg/m3、1300kg/m3、1350kg/m3、1400kg/m3、1450kg/m3Or 1500kg/m3。
In the invention, the volume weight of the furnace lining gap repairing material after being dried at normal temperature (25 ℃) is preferably 350-750 kg/m3Specifically, it may be 350kg/m3、400kg/m3、450kg/m3、500kg/m3、510kg/m3、520kg/m3、530kg/m3、540kg/m3、550kg/m3、560kg/m3、570kg/m3、580kg/m3、590kg/m3、600kg/m3、650kg/m3、700kg/m3Or 750kg/m3。
In the invention, the compressive strength of the furnace lining gap repairing material is preferably less than or equal to 1MPa, and specifically can be 0.1MPa, 0.2MPa, 0.3MPa, 0.4MPa, 0.5MPa, 0.6MPa, 0.7MPa, 0.8MPa, 0.9MPa or 1 MPa.
In the invention, the heating line shrinkage rate of the furnace lining gap repair material is preferably less than or equal to 1%, and specifically can be 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9% or 1%.
In the invention, the viscosity of the furnace lining gap repairing material at 25 ℃ is preferably 10000-100000 MPa.S, and specifically can be 10000MPa.S, 20000MPa.S, 30000MPa.S, 40000MPa.S, 50000MPa.S, 60000MPa.S, 70000MPa.S, 80000MPa.S, 90000MPa.S or 100000 MPa.S.
The invention can keep certain elasticity and certain integral strength of the furnace lining gap repairing material in a high-temperature environment by optimally designing the component composition of the furnace lining gap repairing material, particularly matching and selecting the inorganic fiber and the expansion filler with proper types and dosage. Therefore, the filling agent is filled in a furnace lining gap, so that the heat-shrinkage and cold-expansion characteristics of the furnace lining gap can be well met, and the secondary damage to the furnace lining is effectively avoided; meanwhile, the method can resist the severe working environment in the high-temperature furnace and maintain the long-term stability of the modification effect. In addition, the lining gap repairing material provided by the invention also has certain fluidity, so that the lining gap repairing material can be constructed in a pouring mode and is very suitable for deep repairing of gaps.
The invention also provides a repairing method of the furnace lining gap, which comprises the following steps: cleaning the gaps of the furnace lining, and filling the gaps of the furnace lining with the furnace lining gap repairing material in the technical scheme. The repairing method provided by the invention adopts the furnace lining gap repairing material to repair the furnace lining gap, so that the repairing effect is very excellent, and the service life of the furnace lining is effectively prolonged.
For the sake of clarity, the following examples are given in detail.
Example 1
1) Designing components:
Figure BDA0002348414960000071
2) preparing a repairing material:
uniformly mixing the components according to the component design in the step 1) to obtain a furnace lining gap repairing material; the wet volume weight of the furnace lining gap repairing material is 1250kg/m3The volume weight of the product after drying at room temperature (25 ℃) is 600kg/m3Compressive strength of 0.5MPa, shrinkage of 0.1% on heating wire, viscosity of 100000MPa.S (25 ℃).
Example 2
1) Designing components:
Figure BDA0002348414960000072
2) preparing a repairing material:
uniformly mixing the components according to the component design in the step 1) to obtain a furnace lining gap repairing material; the wet bulk density of the furnace lining gap repairing material is 1200kg/m3The volume weight of the product after drying at normal temperature (25 ℃) is 580kg/m3Compressive strength of 04MPa, 0.1% shrinkage on heating wire, viscosity 100000MPa.S (25 ℃).
Example 3
1) Designing components:
Figure BDA0002348414960000081
2) preparing a repairing material:
uniformly mixing the components according to the component design in the step 1) to obtain a furnace lining gap repairing material; the wet volume weight of the furnace lining gap repairing material is 1150kg/m3The volume weight of the product after drying at room temperature (25 ℃) was 540kg/m3Compressive strength of 0.3MPa, shrinkage of 0.2% on heating wire, viscosity of 100000MPa.S (25 ℃).
Example 4
1) Designing components:
name of ingredient Composition information Content (wt.)
Rock wool fibre The average diameter of the fiber is 6-7 μm, and the average length of the fiber is 8-10 mm 33wt％
Clay clinker powder Al2O330 wt% of the total weight of the powder, and the particle size of the powder is 300 meshes 10wt％
Expanded perlite powder Volume expansion multiple > 4 times, 5mm sieve mesh residueThe maximum amount is 2% 3wt％
Water glass Specific gravity of 1.2 10wt％
Cellulose, process for producing the same, and process for producing the same Chemical formula (C)6H10O5)nA number average molecular weight of 7 to 8 ten thousand 2wt％
Tap water / 42wt％
2) Preparing a repairing material:
uniformly mixing the components according to the component design in the step 1) to obtain a furnace lining gap repairing material; the wet volume weight of the furnace lining gap repairing material is 1250kg/m3The volume weight of the dried product at normal temperature (25 ℃) is 570kg/m3Compressive strength of 0.3MPa, linear expansion + 0.2%, viscosity of 100000MPa.S (25 ℃).
Evaluation of repair Effect
1) Example 1 repair effect test of repair material:
the outer edge of a coke oven door is made of castable, the middle of the coke oven door is insulated by a fiber module, and in the high-temperature use process of 1300 ℃, cracks of about 30mm appear at the junction of the castable and the module due to inconsistent shrinkage, the depth of the cracks reaches 200mm, and the temperature of the outer wall reaches about 100 ℃.
Firstly cleaning a furnace lining gap, then pouring the furnace lining gap repairing material prepared in the embodiment 1 into a special tool (similar to a glue gun type tool), pouring a product into the gap under the action of an external force of extrusion, and then filling the gap from inside to outside.
The repaired oven door is closed, the oven door is used at 1300 ℃, a temperature measuring gun is used for measuring the temperature of the outer wall of the oven door within the temperature range of 30-60 ℃, after the coke oven runs for 1 year, the oven door is opened to observe the use condition of the repair material, and the gap is filled due to the self expansion characteristic of the repair material, so that the original two heat insulation materials are well contacted together, the gap caused by shrinkage is effectively avoided, and the repair material is firmly combined with the gap of the oven lining and does not fall off.
2) Example 2 repair effect test of repair material:
the running temperature of a material box of a certain carbon roasting kiln is 1200 ℃, the expansion joint of a brick wall on the wall of the kiln is 20mm, and the damage crack is 10-40 mm.
The repair material provided in embodiment 2 is used for repairing expansion joints and cracks, and the specific process includes: firstly, expansion joints and cracks are cleaned, then the furnace lining gap repairing material prepared in the embodiment 2 is poured into a special tool (similar to a glue gun type tool), a product is poured into the gaps under the action of an external force of extrusion, and then the gaps are filled from inside to outside.
And closing the repaired furnace door, using the furnace door at 1200 ℃, measuring the temperature of the outer wall of the furnace door within the temperature range of 30-70 ℃ by using a temperature measuring gun, opening the furnace door to observe the use condition of the repairing material after the carbon roasting furnace runs for half a year, filling the gap due to the self expansion characteristic of the repairing material, and firmly combining the repairing material with the furnace lining gap without falling.
3) Example 3 repair effect test of repair material:
after a castable furnace lining of a tunnel kiln is used for a period of time, cracks of the castable furnace lining are serious under the action of thermal shock, and the size of the cracks reaches 10-50 mm, so that the repair material provided by embodiment 3 is adopted to repair the cracks, and the specific process comprises the following steps: firstly, cracks are cleaned, then the lining gap repairing material prepared in the embodiment 3 is poured into a special tool (similar to a glue gun type tool), a product is poured into the gaps under the action of an external force of extrusion, and then the gaps are filled from inside to outside.
And (3) closing the repaired furnace door, using the furnace door at 1100 ℃, measuring the temperature of the outer wall of the furnace door within the temperature range of 50-80 ℃ by using a temperature measuring gun, opening the furnace door to observe the use condition of the repair material after the tunnel kiln castable furnace runs for half a year, and finding that small cracks appear on the repaired part, wherein the use effect is not very satisfactory although the use is not influenced.
4) Example 4 repair effect test of repair material:
10-30 mm cracks appear on the heat-insulating layer of the shuttle kiln at a temperature lower than 1000 ℃, so that the temperature of the outer wall of the kiln is increased to 80 ℃, and potential safety hazards are generated. Therefore, the repair material provided in example 4 is used for repairing cracks, and the specific process includes: firstly cleaning a furnace lining gap, then pouring the furnace lining gap repairing material prepared in the embodiment 4 into a special tool (similar to a glue gun type tool), pouring a product into the gap under the action of an external force of extrusion, and then filling the gap from inside to outside.
The repaired furnace door is closed, the temperature of the outer wall of the furnace door is measured to be 50 ℃ by using a temperature measuring gun after the furnace door is used at 1000 ℃, the furnace door is opened to observe the service condition of the repairing material after the shuttle kiln runs for half a year, the gap is filled with the repairing material due to the self expansion characteristic, the gap caused by shrinkage is effectively avoided, and the repairing material is firmly combined with the gap of the furnace lining and does not fall off.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. A furnace lining gap repairing material comprises the following components in percentage by weight:
Figure FDA0002348414950000011
the inorganic fiber comprises one or more of glass fiber, rock wool fiber, aluminum silicate fiber, magnesium silicate fiber, calcium silicate fiber, zirconium-containing fiber and alumina fiber;
the expanded filler comprises one or more of expanded perlite powder, expanded vermiculite powder, expanded cyanite powder and sillimanite powder.
2. The lining gap repair material according to claim 1, wherein the inorganic fibers have a fiber diameter of 1 to 10 μm and a fiber length of 1 to 10 mm.
3. The lining gap repair material according to claim 1, wherein the volume expansion factor of the expansion filler is greater than 0.5.
4. The lining gap repair material according to claim 1, wherein the refractory powder includes one or more of corundum powder, zircon powder, kaolin powder, and clay clinker powder.
5. The lining gap repair material according to claim 1, wherein the particle size of the refractory powder is 200 to 500 mesh.
6. The lining gap repair material according to claim 1, wherein the binder includes an inorganic binder and an organic binder;
the inorganic binder comprises one or more of water glass, liquid silica gel, liquid aluminum gel and aluminum dihydrogen phosphate;
the organic binder comprises one or more of cellulose, starch, dextrin and xanthan gum.
7. The furnace lining gap repair material according to claim 6, wherein the mass ratio of the inorganic binder to the organic binder is (4-10): 1.
8. the lining crack repair material according to claim 1, wherein the solvent is water.
9. The lining crack repair material according to claim 1, which comprises the following components in percentage by weight:
Figure FDA0002348414950000021
10. a repairing method of a furnace lining gap comprises the following steps:
cleaning the gaps of the furnace lining, and filling the gaps of the furnace lining with the furnace lining gap repairing material according to any one of claims 1 to 9.
CN201911405096.9A 2019-12-31 2019-12-31 Furnace lining gap repairing material and repairing method of furnace lining gap Pending CN111039684A (en)

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CN111621175A (en) * 2020-06-03 2020-09-04 山东民烨耐火纤维有限公司 Ceramic fiber coating containing nano-alumina
CN112280343B (en) * 2020-11-10 2022-07-19 山东鲁阳节能材料股份有限公司 High-temperature nano composite coating, preparation method thereof and small-bag flexible package coating
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CN112299822A (en) * 2020-11-23 2021-02-02 中铸新材工业（江苏）有限公司 Fiber-based anti-aluminum-adhesion rapid repairing material and manufacturing method thereof
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