CN113336561A - Light heat-insulation type pouring material for permanent layer of tundish - Google Patents
Light heat-insulation type pouring material for permanent layer of tundish Download PDFInfo
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- CN113336561A CN113336561A CN202110557729.9A CN202110557729A CN113336561A CN 113336561 A CN113336561 A CN 113336561A CN 202110557729 A CN202110557729 A CN 202110557729A CN 113336561 A CN113336561 A CN 113336561A
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- parts
- tundish
- pouring material
- permanent layer
- powder
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- 239000000463 material Substances 0.000 title claims abstract description 23
- 238000009413 insulation Methods 0.000 title claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 36
- 239000010959 steel Substances 0.000 claims abstract description 36
- 239000000843 powder Substances 0.000 claims abstract description 25
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000000835 fiber Substances 0.000 claims abstract description 16
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 14
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052863 mullite Inorganic materials 0.000 claims abstract description 11
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 150000004645 aluminates Chemical class 0.000 claims abstract description 8
- 239000004568 cement Substances 0.000 claims abstract description 8
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 8
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 6
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000002994 raw material Substances 0.000 claims abstract description 5
- 229910001570 bauxite Inorganic materials 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 abstract description 6
- 238000009628 steelmaking Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000005266 casting Methods 0.000 description 5
- 230000017525 heat dissipation Effects 0.000 description 3
- 238000009749 continuous casting Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- C04B2235/5208—Fibers
- C04B2235/5216—Inorganic
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- C04B2235/54—Particle size related information
- C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
- C04B2235/5436—Particle size related information expressed by the size of the particles or aggregates thereof micrometer sized, i.e. from 1 to 100 micron
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/74—Physical characteristics
- C04B2235/77—Density
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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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- 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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- 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
- C04B2235/9615—Linear firing shrinkage
Abstract
The invention discloses a lightweight heat-insulation pouring material for a permanent layer of a tundish, which comprises the following preparation raw materials in parts by weight: 50-70 parts of mullite lightweight aggregate, 20-35 parts of high-alumina powder, 5-15 parts of aluminum oxide micro powder, 5-15 parts of silicon dioxide micro powder, 10-15 parts of aluminate cement, 0.5-3.0 parts of steel fiber, 0.1-0.5 part of explosion-proof fiber and 0.1-0.5 part of water reducing agent. The pouring material has the beneficial effects that the pouring material is simple in preparation process and convenient to prepare, the pouring material can be used for preparing the tundish to replace the existing heavy tundish, the temperature of the outer surface of the steel shell of the tundish is effectively reduced, and meanwhile, the steel-making cost is also effectively reduced.
Description
Technical Field
The invention relates to the technical field of casting materials, in particular to a lightweight heat-insulation type pouring material for a permanent layer of a tundish.
Background
The pouring basket is used as the flow dividing container and the flow stabilizing container for continuously casting steel in the steel industry, firstly receives molten steel poured from a steel ladle, and then the molten steel is divided into various crystallizers by a pouring basket water gap to form casting blanks.
The permanent layer of the tundish generally adopts heavy castable, the volume density is more than 2.65g/cm3, and the steel-making cost is increased because the density is higher, the heat conductivity is high and the heat dissipation is obvious, on one hand, the temperature of molten steel in a steel ladle must be increased to keep the temperature of the molten steel in the tundish; on the other hand, the heat dissipation is obvious, the temperature of the tundish steel shell is increased, the deformation of the steel structure is accelerated, and certain influence is exerted on the continuous casting production and the service life of the tundish steel shell.
Disclosure of Invention
The invention aims to solve the problems and designs a lightweight heat-insulation type pouring material for a permanent layer of a tundish.
The technical scheme of the invention is that the light heat insulation type tundish permanent layer castable comprises the following configuration raw materials of mullite light aggregate, high alumina bauxite powder, alumina micropowder, silica micropowder, aluminate cement, steel fiber, explosion-proof fiber and a water reducing agent.
As further description of the invention, the weight raw materials comprise the following components in parts by weight: 50-70 parts of mullite lightweight aggregate, 20-35 parts of high-alumina powder, 5-15 parts of aluminum oxide micro powder, 5-15 parts of silicon dioxide micro powder, 10-15 parts of aluminate cement, 0.5-3.0 parts of steel fiber, 0.1-0.5 part of explosion-proof fiber and 0.1-0.5 part of water reducing agent.
As further description of the invention, the mullite lightweight aggregate is artificially synthesized, and the calcined bauxite powder has the granularity of 200-325 meshes.
As a further description of the invention, the particle size of the alumina micropowder is less than 5 microns, and the SiO micropowder has a particle size2The content is more than or equal to 96 percent.
As a further description of the present invention, the standing and curing treatment time is 24 to 40 hours.
The pouring material has the beneficial effects that the pouring material for the permanent layer of the light heat-insulation tundish is prepared from mullite light aggregate, high-alumina bauxite powder, alumina micropowder, silica micropowder, aluminate cement steel fiber, explosion-proof fiber and a water reducing agent, the pouring material is simple in preparation process and convenient to prepare, the pouring material is used for preparing the tundish, the pouring material can replace the existing heavy tundish, the service life of a steel shell of the tundish is effectively prolonged, and meanwhile, the steel-making cost is also effectively reduced.
Detailed Description
Firstly, the invention is designed with an original purpose, a tundish is used as a shunt container and a steady flow container for continuously casting steel in the steel industry, molten steel poured into a steel ladle is firstly received, then the molten steel is shunted into each crystallizer by a tundish nozzle to form a casting blank, the tundish has larger volume, can stabilize the pouring speed of the molten steel, is beneficial to floating up of impurities in the molten steel and has the function of purifying the molten steel, a permanent layer of the tundish generally adopts heavy castable, the volume density is more than 2.65g/cm3, and the temperature of the molten steel in the steel ladle must be increased on one hand to keep the temperature of the molten steel in the tundish, so that the steelmaking cost is increased; on the other hand, the heat dissipation is obvious, the temperature of the tundish steel shell is increased, the deformation of the steel structure is accelerated, and certain influence is exerted on the continuous casting production and the service life of the tundish steel shell, so that the light heat-insulation type tundish permanent layer castable is designed.
The invention is described in detail below, and the pouring material for the permanent layer of the light heat-insulating tundish is kept still for 24-40 hours. The raw materials for the preparation comprise mullite lightweight aggregate, high-alumina bauxite powder, alumina micro powder, silica micro powder, aluminate cement steel fiber, explosion-proof fiber and a water reducing agent.
The weight portions of the weight materials are: 50-70 parts of mullite lightweight aggregate, 20-35 parts of high-alumina powder, 5-15 parts of aluminum oxide micro powder, 5-15 parts of silicon dioxide micro powder, 10-15 parts of aluminate cement, 0.5-3.0 parts of steel fiber, 0.1-0 part of explosion-proof fiber and 0.1-0.5 part of water reducing agent.
Wherein, the mullite lightweight aggregate is artificially synthesized, and the high bauxite powder is calcined bauxite with the granularity of 200-325 meshes.
Wherein, the aluminum oxideThe particle size of the micro powder is less than 5 microns, and SiO in the silicon dioxide micro powder2The content is more than or equal to 96 percent.
The preparation of the lightweight heat-insulating pouring material for the permanent layer of the tundish is completed through the formula, the pouring material can be used for a long time in a use environment of 1450 ℃ and can also be used for a short time in a 1500-temperature environment, and the physical and chemical indexes of the pouring material are shown in table 1:
TABLE 1 physicochemical indices of the castable
| Item | Detection conditions | Index (I) |
| Al2O3 | 50％～60％ | |
| SiO2 | 30％～35％ | |
| CaO | 1.8％～3.0％ | |
| Bulk density after baking | 110℃×24h | 2.0～2.1g/cm3 |
| Breaking strength after baking | 110℃×24h | 5.0～7.0MPa |
| Linear rate of change after firing | 1400℃×3h | -1.5％～-0.5％ |
| Coefficient of thermal conductivity | Hot surface 1200 deg.C | 0.9～1.1W/(m·k) |
The pouring material is simple in preparation process and convenient to prepare, the pouring material is used for preparing the pouring basket, the pouring basket can replace the existing heavy pouring basket, the service life of the steel shell of the pouring basket is effectively prolonged, and meanwhile, the steel-making cost is also effectively reduced.
The technical solutions described above only represent the preferred technical solutions of the present invention, and some possible modifications to some parts of the technical solutions by those skilled in the art all represent the principles of the present invention, and fall within the protection scope of the present invention.
Claims (5)
1. The light heat-insulating pouring material for the permanent layer of the tundish is characterized in that the pouring material comprises mullite light aggregate, high-alumina bauxite powder, aluminum oxide micro powder, silicon dioxide micro powder, aluminate cement, steel fiber, explosion-proof fiber and a water reducing agent.
2. The lightweight heat insulation type tundish permanent layer castable according to claim 1, wherein the weight-balancing raw materials comprise: 50-70 parts of mullite lightweight aggregate, 20-35 parts of high-alumina powder, 5-15 parts of aluminum oxide micro powder, 5-15 parts of silicon dioxide micro powder, 10-15 parts of aluminate cement, 0.5-3.0 parts of steel fiber, 0.1-0.5 part of explosion-proof fiber and 0.1-0.5 part of water reducing agent.
3. The light-weight heat-insulation type tundish permanent layer castable according to claim 1, wherein the mullite-based light aggregate is artificially synthesized, and the calcined bauxite powder has a particle size of 200-325 meshes.
4. The lightweight heat insulation type tundish permanent layer castable according to claim 1, wherein the particle size of the alumina micropowder is less than 5 μm, and the silica micropowder SiO is2The content is more than or equal to 96 percent.
5. The lightweight heat insulation type tundish permanent layer castable according to claim 1, wherein the standing and curing treatment time is 24-40 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110557729.9A CN113336561A (en) | 2021-05-21 | 2021-05-21 | Light heat-insulation type pouring material for permanent layer of tundish |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110557729.9A CN113336561A (en) | 2021-05-21 | 2021-05-21 | Light heat-insulation type pouring material for permanent layer of tundish |
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| Publication Number | Publication Date |
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| CN113336561A true CN113336561A (en) | 2021-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110557729.9A Pending CN113336561A (en) | 2021-05-21 | 2021-05-21 | Light heat-insulation type pouring material for permanent layer of tundish |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102887715A (en) * | 2011-07-22 | 2013-01-23 | 宝山钢铁股份有限公司 | Ladle permanent lining pouring material capable of rapid roasting |
| CN103964865A (en) * | 2014-04-22 | 2014-08-06 | 中国地质大学（北京） | Preparation method for light-weight porous mullite refractory castable |
| CN110256090A (en) * | 2019-06-24 | 2019-09-20 | 武汉钢铁有限公司 | A kind of tundish permanent layer lightweight insulated pouring material |
| CN110467472A (en) * | 2019-08-27 | 2019-11-19 | 北京利尔高温材料股份有限公司 | A kind of continuous casting production permanent layer castable |
| CN110655391A (en) * | 2019-09-24 | 2020-01-07 | 武汉钢铁集团耐火材料有限责任公司 | Semi-light ladle permanent layer castable and method for preparing ladle permanent layer by using same |
| CN111995410A (en) * | 2020-08-24 | 2020-11-27 | 武汉钢铁集团耐火材料有限责任公司 | Lightweight moisturizing and heat-insulating pouring material for tundish cover and preparation method thereof |
-
2021
- 2021-05-21 CN CN202110557729.9A patent/CN113336561A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102887715A (en) * | 2011-07-22 | 2013-01-23 | 宝山钢铁股份有限公司 | Ladle permanent lining pouring material capable of rapid roasting |
| CN103964865A (en) * | 2014-04-22 | 2014-08-06 | 中国地质大学（北京） | Preparation method for light-weight porous mullite refractory castable |
| CN110256090A (en) * | 2019-06-24 | 2019-09-20 | 武汉钢铁有限公司 | A kind of tundish permanent layer lightweight insulated pouring material |
| CN110467472A (en) * | 2019-08-27 | 2019-11-19 | 北京利尔高温材料股份有限公司 | A kind of continuous casting production permanent layer castable |
| CN110655391A (en) * | 2019-09-24 | 2020-01-07 | 武汉钢铁集团耐火材料有限责任公司 | Semi-light ladle permanent layer castable and method for preparing ladle permanent layer by using same |
| CN111995410A (en) * | 2020-08-24 | 2020-11-27 | 武汉钢铁集团耐火材料有限责任公司 | Lightweight moisturizing and heat-insulating pouring material for tundish cover and preparation method thereof |
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