CN110698185A - Light corundum-mullite composite refractory material for blast furnace air supply device - Google Patents
Light corundum-mullite composite refractory material for blast furnace air supply device Download PDFInfo
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- CN110698185A CN110698185A CN201911020697.8A CN201911020697A CN110698185A CN 110698185 A CN110698185 A CN 110698185A CN 201911020697 A CN201911020697 A CN 201911020697A CN 110698185 A CN110698185 A CN 110698185A
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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
- C04B35/106—Refractories from grain sized mixtures containing zirconium oxide or zircon (ZrSiO4)
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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
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/6303—Inorganic additives
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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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- C04B2235/30—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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- C04B2235/02—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
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
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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
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Abstract
The invention relates to a light corundum-mullite composite refractory material for a blast furnace air supply device, which comprises the following components in percentage by mass: 40-65% of light corundum aggregate, 3-10% of zircon, 20-30% of mullite, 3-10% of composite bonding agent and 1-6% of expanding agent, wherein the light corundum aggregate is a high-performance porous refractory aggregate prepared by foam method by taking corundum powder as a raw material, the use temperature is as high as 1600 ℃, the load softening temperature is high, the strength is high, the thermal conductivity is low, the thermal insulation performance is good, the thermal expansion coefficient of the zircon and the mullite is small, the thermal shock stability of the refractory material can be improved, the erosion resistance and the erosion resistance of the zircon are strong, and the erosion and the abrasion of hot air to the refractory material can be effectively resisted. The refractory material has the advantages of low thermal conductivity, good thermal shock stability, excellent anti-scouring performance, high strength and the like, and the blast furnace air supply device manufactured by using the refractory material has low surface temperature, good energy-saving performance and long service life, improves the production efficiency of the blast furnace, and avoids potential safety hazards caused by frequent replacement of air supply equipment.
Description
Technical Field
The invention relates to the technical field of preparation of refractory materials for blast furnace air supply devices, in particular to a light corundum-mullite composite refractory material for a blast furnace air supply device, which has low heat conductivity coefficient, good thermal shock resistance and strong scouring resistance.
Background
The current conditions of the refractory material for the inner lining of the blast furnace air supply equipment are as follows: clay or high-alumina low-cement castable, which has the defects of high heat conductivity coefficient, poor thermal shock stability, weak hot wind and gas flow erosion resistance and the like, causes high surface temperature of air supply equipment, red burning-through of a belly pipe, short service life and frequent replacement, and seriously affects the production efficiency and safety of a blast furnace.
Disclosure of Invention
The invention aims to solve the problems, and provides the light corundum-mullite composite refractory material for the blast furnace air supply device, which takes light corundum-mullite and the like as raw materials and has low heat conductivity coefficient, good thermal shock stability and excellent scouring resistance.
The invention solves the problems and adopts the technical scheme that:
the light corundum-mullite composite refractory material for the blast furnace air supply device comprises the following components in percentage by mass: 40-65% of light corundum aggregate, 3-10% of zircon, 20-30% of mullite, 3-10% of composite bonding agent and 1-6% of expanding agent.
Compared with the prior art, the invention adopting the technical scheme has the outstanding characteristics that:
the refractory material has the advantages of low thermal conductivity, good thermal shock stability, excellent anti-scouring performance, high strength and the like, and the blast furnace air supply device manufactured by using the refractory material has low surface temperature, good energy-saving performance and long service life, improves the production efficiency of the blast furnace, and avoids potential safety hazards caused by frequent replacement of air supply equipment.
Preferably, the further technical scheme of the invention is as follows:
the light corundum aggregate comprises the following components in percentage by mass, wherein the light corundum aggregate accounts for 100 percent in mass, and the particle size grade and the corresponding mass ratio of the light corundum aggregate are as follows: 40% -50% of 5-8mm, 10% -30% of 3-5mm, 10% -20% of 1-3m and 10% -20% of 0-1mm, and the microporous structure of the light corundum can reduce the heat conductivity of the refractory material and can also ensure higher compressive strength of the refractory material.
The composite binder comprises the following components in percentage by mass based on 100% of the mass of the composite binder: 30-50% of silicon powder and 50-60% of alumina powder, the silicon powder has stable chemical properties and good filling property, micropores of a refractory material tissue structure can be fully filled to improve the strength, the alumina powder can improve the fluidity of the refractory material, and the alumina powder reacts with SiO2 to generate mullite at high temperature, so that the strength of the refractory material is improved.
The composition and the corresponding mass ratio of the expanding agent are as follows by taking the mass of the expanding agent as 100 percent: 50-70% of kyanite and 30-50% of sillimanite, wherein the kyanite and the sillimanite belong to high-temperature expanding agents, and the added expanding agents can cause volume shrinkage of the non-refractory material after high-temperature water loss, so that the thermal shock stability of the material is improved, and cracks formed by the refractory material under thermal stress are eliminated.
The specific implementation mode is as follows:
the invention will be further illustrated by the following examples, which are intended only for a better understanding of the present invention and therefore do not limit the scope of the invention.
The light corundum aggregate used in the invention is calculated by the mass of 100 percent, and the particle size grade and the corresponding mass ratio are as follows: 5-8mm 40% -50%, 3-5mm 10% -30%, 1-3m 10-20%, 0-1mm 10-20%, and the microporous structure of the light corundum can reduce the heat conductivity of the refractory material and can also ensure higher compressive strength.
The composite binding agent used by the invention comprises the following components in percentage by mass based on 100 percent: 30-50% of silicon powder and 50-60% of alumina powder, the silicon powder has stable chemical properties and good filling property, micropores of a refractory material tissue structure can be fully filled to improve the strength, the alumina powder can improve the fluidity of the refractory material, and the alumina powder reacts with SiO2 to generate mullite at high temperature, so that the strength of the refractory material is improved.
The expanding agent used by the invention comprises the following components in percentage by mass based on 100 percent: 50-70% of kyanite and 30-50% of sillimanite, wherein the kyanite and the sillimanite belong to high-temperature expanding agents, and the added expanding agents can cause volume shrinkage of the non-refractory material after high-temperature water loss, so that the thermal shock stability of the material is improved, and cracks formed by the refractory material under thermal stress are eliminated.
Example 1:
the light corundum-mullite composite refractory material for the blast furnace air supply device comprises the following components in percentage by mass: 40% of light corundum aggregate, 10% of zircon, 30% of mullite, 7% of composite bonding agent and 3% of expanding agent.
The preparation method comprises the following steps: the raw materials are mechanically stirred and uniformly mixed, 8-10% of clear water is added for stirring when the material is used, the material is molded by adopting a pouring and vibrating method, the mold is removed after 24 hours, and the material can be put into use after standard maintenance for 72 hours and baking at 300 ℃.
Example 2:
the light corundum-mullite composite refractory material for the blast furnace air supply device comprises the following components in percentage by mass: 56% of light corundum aggregate, 6% of zircon, 25% of mullite, 10% of composite bonding agent and 6% of expanding agent.
The preparation method comprises the following steps: the raw materials are mechanically stirred and uniformly mixed, 8-10% of clear water is added for stirring when the material is used, the material is molded by adopting a pouring and vibrating method, the mold is removed after 24 hours, and the material can be put into use after standard maintenance for 72 hours and baking at 300 ℃.
Example 3:
the light corundum-mullite composite refractory material for the blast furnace air supply device comprises the following components in percentage by mass: 65% of light corundum aggregate, 3% of zircon, 20% of mullite, 3% of composite bonding agent and 1% of expanding agent.
The preparation method comprises the following steps: the raw materials are mechanically stirred and uniformly mixed, 8-10% of clear water is added for stirring when the material is used, the material is molded by adopting a pouring and vibrating method, the mold is removed after 24 hours, and the material can be put into use after standard maintenance for 72 hours and baking at 300 ℃.
The performance of the lightweight corundum-mullite composite refractory material for the blast furnace air supply device prepared in the embodiment 1-3 is shown in table 1, and the lightweight corundum aggregate is a high-performance porous refractory aggregate prepared by a foam method by taking corundum powder as a raw material, and has the advantages of high refractoriness under load, high strength, low thermal conductivity and good heat preservation performance, and the use temperature is as high as 1600 ℃; the zircon and the mullite have stable chemical properties and small thermal expansion coefficient, and can improve the thermal shock stability of the refractory material; the zircon has strong erosion resistance and erosion resistance, and can effectively improve the erosion resistance of the refractory material.
Table 1:
the refractory material has the advantages of low thermal conductivity, good thermal shock stability, excellent anti-scouring performance, high strength and the like. The blast furnace air supply device made of the refractory material has the advantages of low surface temperature, good energy-saving performance and long service life, improves the production efficiency of the blast furnace, and avoids potential safety hazards caused by frequent replacement of air supply equipment.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the scope of the present invention, which is defined by the appended claims.
Claims (4)
1. The light corundum-mullite composite refractory material for the blast furnace air supply device is characterized by comprising the following components in percentage by mass: 40-65% of light corundum aggregate, 3-10% of zircon, 20-30% of mullite, 3-10% of composite bonding agent and 1-6% of expanding agent.
2. The lightweight corundum-mullite composite refractory material for the blast furnace air supply device according to claim 1, wherein the particle size grade and the corresponding mass ratio of the lightweight corundum aggregate are as follows, wherein the weight of the lightweight corundum aggregate is 100 percent: 40-50% of 5-8mm, 10-30% of 3-5mm, 10-20% of 1-3m and 10-20% of 0-1 mm.
3. The lightweight corundum-mullite composite refractory for the blast furnace air supply device according to claim 1, wherein the composition and corresponding mass ratio of the composite bonding agent are as follows, wherein the mass of the composite bonding agent is 100 percent: 30-50% of silicon micro powder and 50-60% of alumina micro powder.
4. The lightweight corundum-mullite composite refractory for the blast furnace air supply device according to claim 1, wherein the composition and the corresponding mass ratio of the expanding agent are as follows, wherein the mass of the expanding agent is 100 percent: 50-70% of kyanite and 30-50% of sillimanite.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911020697.8A CN110698185A (en) | 2019-10-25 | 2019-10-25 | Light corundum-mullite composite refractory material for blast furnace air supply device |
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| CN201911020697.8A CN110698185A (en) | 2019-10-25 | 2019-10-25 | Light corundum-mullite composite refractory material for blast furnace air supply device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111517813A (en) * | 2020-05-25 | 2020-08-11 | 郑州东豫新材料科技有限公司 | Heavy refractory material used for top combustion type hot blast stove top and capable of resisting thermal shock and preparation method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2556644C3 (en) * | 1974-12-26 | 1984-05-17 | Société Européenne des Produits Réfractaires, 92200 Neuilly-sur-Seine | Lining for pusher ovens |
| EP0482984A1 (en) * | 1990-10-24 | 1992-04-29 | Savoie Refractaires | Refractory material bonded by a sialon matrix and process for its production |
| CN101215176A (en) * | 2007-12-28 | 2008-07-09 | 中国钢研科技集团公司 | High-strength low heat conductivity energy-saving fireproof material |
| CN102757244A (en) * | 2012-06-25 | 2012-10-31 | 郑州安耐克实业有限公司 | Corundum-mullite zircon fire-proofing material and preparation method thereof |
| CN103204684A (en) * | 2012-12-05 | 2013-07-17 | 中国石油集团东北炼化工程有限公司吉林设计院 | Chromium zirconium corundum mullite brick suitable for burning of waste liquid and wastes of petrochemical industry |
| CN104829243A (en) * | 2015-04-10 | 2015-08-12 | 浙江锦诚耐火材料有限公司 | Preparation method of prefabricated component at kiln port used for cement kiln |
| CN105481375A (en) * | 2014-09-18 | 2016-04-13 | 青岛炜烨锻压机械有限公司 | Energy-saving and fire-resistant material |
-
2019
- 2019-10-25 CN CN201911020697.8A patent/CN110698185A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2556644C3 (en) * | 1974-12-26 | 1984-05-17 | Société Européenne des Produits Réfractaires, 92200 Neuilly-sur-Seine | Lining for pusher ovens |
| EP0482984A1 (en) * | 1990-10-24 | 1992-04-29 | Savoie Refractaires | Refractory material bonded by a sialon matrix and process for its production |
| CN101215176A (en) * | 2007-12-28 | 2008-07-09 | 中国钢研科技集团公司 | High-strength low heat conductivity energy-saving fireproof material |
| CN102757244A (en) * | 2012-06-25 | 2012-10-31 | 郑州安耐克实业有限公司 | Corundum-mullite zircon fire-proofing material and preparation method thereof |
| CN103204684A (en) * | 2012-12-05 | 2013-07-17 | 中国石油集团东北炼化工程有限公司吉林设计院 | Chromium zirconium corundum mullite brick suitable for burning of waste liquid and wastes of petrochemical industry |
| CN105481375A (en) * | 2014-09-18 | 2016-04-13 | 青岛炜烨锻压机械有限公司 | Energy-saving and fire-resistant material |
| CN104829243A (en) * | 2015-04-10 | 2015-08-12 | 浙江锦诚耐火材料有限公司 | Preparation method of prefabricated component at kiln port used for cement kiln |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111517813A (en) * | 2020-05-25 | 2020-08-11 | 郑州东豫新材料科技有限公司 | Heavy refractory material used for top combustion type hot blast stove top and capable of resisting thermal shock and preparation method thereof |
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Application publication date: 20200117 |