CN114653933A - Production method for prolonging service life of billet continuous casting tundish - Google Patents
Production method for prolonging service life of billet continuous casting tundish Download PDFInfo
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- CN114653933A CN114653933A CN202210269640.7A CN202210269640A CN114653933A CN 114653933 A CN114653933 A CN 114653933A CN 202210269640 A CN202210269640 A CN 202210269640A CN 114653933 A CN114653933 A CN 114653933A
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- 238000009749 continuous casting Methods 0.000 title claims abstract description 33
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 12
- 230000008569 process Effects 0.000 claims abstract description 12
- 239000011819 refractory material Substances 0.000 claims abstract description 10
- 239000002893 slag Substances 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000002737 fuel gas Substances 0.000 claims abstract description 5
- 239000003381 stabilizer Substances 0.000 claims abstract description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 20
- 239000007789 gas Substances 0.000 claims description 16
- 239000003345 natural gas Substances 0.000 claims description 10
- BYFGZMCJNACEKR-UHFFFAOYSA-N aluminium(i) oxide Chemical compound [Al]O[Al] BYFGZMCJNACEKR-UHFFFAOYSA-N 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 6
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 4
- 239000003034 coal gas Substances 0.000 claims description 4
- 230000000704 physical effect Effects 0.000 claims description 4
- 238000009472 formulation Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 238000005266 casting Methods 0.000 abstract description 4
- 229910000831 Steel Inorganic materials 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical group [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 230000003628 erosive effect Effects 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 210000002219 extraembryonic membrane Anatomy 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/005—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with heating or cooling means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/02—Linings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
- B22D41/52—Manufacturing or repairing thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
- B22D41/60—Pouring-nozzles with heating or cooling means
-
- 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
- C04B35/01—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
- C04B35/03—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 magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
- C04B35/04—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 magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on magnesium oxide
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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
- C04B2235/30—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
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3208—Calcium oxide or oxide-forming salts thereof, e.g. lime
-
- 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
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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
- C04B2235/30—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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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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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
- C04B2235/74—Physical characteristics
- C04B2235/77—Density
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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
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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- Manufacturing & Machinery (AREA)
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- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Ceramic Products (AREA)
Abstract
The invention discloses a production method for prolonging the service life of a billet continuous casting tundish, which comprises the following steps: optimizing a refractory baking curve of the tundish; a lower air suction device is added in the baking process of the tundish; the heat value of the knotted baking fuel gas of the tundish working layer is improved; the middle split type current stabilizer is changed into an integral type; changing a small tire film of an upper water gap of a tundish working layer into a cone with a thick upper part and a thin lower part; the dry material of the tundish is changed into slag line material. According to the invention, by optimizing the baking curve of the refractory material of the tundish, the problem of tundish closure caused by the quality problem of the refractory material of the tundish is reduced, the production efficiency and the casting blank quality of the continuous casting machine can be effectively improved, and the production running cost and consumption are reduced.
Description
Technical Field
The invention relates to the technical field of smelting, in particular to a production method for prolonging the service life of a billet continuous casting tundish.
Background
For continuous casting production, the improvement of the operating rate of a continuous casting machine means the improvement of yield and benefit, and the high-efficiency continuous casting technology is a continuous casting system technology which takes high drawing speed as a core and realizes high continuous casting rate and high operating rate on the basis of high-quality and defect-free casting blank production, so that the development of the high-efficiency continuous casting technology becomes a main direction for developing the potential of the continuous casting technology, is highly emphasized by various main steel enterprises, engineering companies and equipment manufacturers in the world, and has very wide development prospect.
The continuous casting time of the tundish is prolonged, the number of continuous casting furnaces of the tundish can be increased, the downtime of a continuous casting machine is further reduced, the yield is improved, the consumption of steel materials, energy media and cost of steel refractory materials per ton can be reduced, and the use benefit of the tundish is maximized. However, in the actual production process, the factors limiting the high-efficiency production of continuous casting are many, wherein the quality and the service life of a tundish of a continuous casting machine are one of the factors, the existing tundish has poor refractory quality, seriously pollutes the quality of molten steel, simultaneously reduces the quality of steel billets, and the service life of the tundish also severely limits the number of continuous casting furnaces, thereby not only reducing the yield of the molten steel, but also reducing the number of the continuous casting furnaces of the continuous casting machine.
Disclosure of Invention
The invention aims to provide a production method for prolonging the service life of a continuous casting tundish of a billet by effectively improving the production efficiency and the casting blank quality of a continuous casting machine and reducing the production running cost and consumption.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a production method for prolonging the service life of a billet continuous casting tundish comprises the following steps:
optimizing a refractory baking curve of the tundish;
a lower air suction device is added in the baking process of the tundish;
the heat value of the knotted baking fuel gas of the tundish working layer is improved;
the middle split type current stabilizer is changed into an integral type;
changing a small tire film of an upper water gap of a tundish working layer into a cone with a thick upper part and a thin lower part;
the dry material of the tundish is changed into slag line material.
Preferably, the specific steps for optimizing the baking curve of the tundish refractory material are as follows: and changing the baking mode of the tundish refractory into a baking mode of small fire, medium fire and large fire, and making a baking temperature curve.
Preferably, the baking temperature curve is formulated as follows: keeping the normal baking bag on soft fire for 1.5 hours, fully opening a gas valve, opening a fan valve to 1/4 degrees, and baking the tundish to 600 ℃;
then, adjusting the middle fire for 1 hour, fully opening a gas valve, opening a fan valve by 1/2 degrees, and baking the tundish to reach 900 ℃;
finally, the fire is turned over for 1.5 hours, the gas valve is fully opened, the fan valve is fully opened, the ladle is baked for 4 hours, and when the baking temperature of the tundish measured by the post worker is less than 900 ℃, natural gas is mixed, and the natural gas valve 1/4 is opened until the tundish is poured.
Preferably, in the baking process of the tundish, the specific steps of adding the down-draft device are as follows: in the later baking stage of the tundish, a down-draft device is additionally used, the heat in the tundish is sucked down by utilizing the negative pressure generated by the compressed air flow, and the down-draft device is a negative pressure fan.
Preferably, the specific steps of improving the heat value of the knotted baking fuel gas of the tundish working layer are as follows: the gas for baking the tundish is changed from coal gas to natural gas, so that the baking temperature in the knotting process of the tundish is increased.
Preferably, the chemical components of the slag line material are as follows: MgO: 66-73%, CaO: 1-3%, SiO 2: 3-6%, Al2O 3: 6 to 10 percent.
Preferably, the physical properties of the slag line material are as follows: bulk density: not less than 2.1g/cm3, breaking strength: not less than 2.0MPa, compressive strength: not less than 4.0 MPa.
Preferably, the lower air suction device is arranged in a lower sliding block of the tundish.
Compared with the prior art, the invention has the advantages that:
according to the invention, by optimizing the baking curve of the refractory material of the tundish, the problem of tundish closure caused by the quality problem of the refractory material of the tundish is reduced, the production efficiency and the casting blank quality of the continuous casting machine can be effectively improved, and the production running cost and consumption are reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a graph showing the baking temperature in example 1 of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention will be more clearly and clearly defined.
The invention provides a production method for prolonging the service life of a billet continuous casting tundish, which comprises the following steps:
(1) the baking mode of the refractory of the tundish is changed into a baking mode of small fire, medium fire and large fire, and a specific baking temperature curve is formulated at the same time, so that the baking quality of the tundish is improved;
(2) in the later baking stage of the tundish, a lower air suction device is additionally used, and the heat in the tundish is sucked down by using the negative pressure generated by the compressed air flow, so that the purpose of baking the zirconium core of the upper nozzle of the tundish is achieved, and the using effect of the upper nozzle of the tundish is improved;
(3) the gas for baking the tundish is changed from coal gas to natural gas, the baking temperature in the knotting process of the tundish is increased, the knotting baking time of the tundish after modification is about 3 hours, and the sintering thickness of the working layer reaches 30-35 mm from 10-15 mm;
(4) the small tire film of the upper nozzle of the tundish working layer is changed into a cone with a thick upper part and a thin lower part, so that the falling and falling of the bowl working layer of the upper nozzle are avoided;
(5) the tundish current stabilizer is changed into an integral type from a split type current stabilizer, so that the erosion resistance of the refractory material is improved;
(6) the dry material of the tundish is completely used instead of the prior bottom material, wall material and slag line material of the tundish, thereby providing the anti-corrosion capability of the bottom of the tundish and reducing the falling of the refractory material.
Example one
The baking mode of the tundish refractory is changed into a baking mode of small fire, medium fire and large fire, and a specific baking temperature curve is formulated as shown in the following figure 1;
keeping the normal baking temperature of the tundish at 200-600 ℃ for 1.5 hours, fully opening a gas valve, opening a fan valve at 1/4, and baking the tundish at 600 ℃; then, adjusting the middle fire (600-900 ℃) and keeping for 1 hour, fully opening a gas valve, opening a fan valve to 1/2 degrees, and baking the tundish to 900 ℃; and finally, adjusting the temperature of the fire (900-1100 ℃) to keep for 1.5 hours, fully opening a gas valve, fully opening a fan valve, baking the ladle for 4 hours, measuring by a post worker, if the baking temperature of the tundish is less than 900 ℃, adding natural gas, and opening a natural gas valve 1/4 until the tundish is poured. The baked tundish is directly put into use, and if the baking time needs to be prolonged due to problems of production organization and the like, the temperature should not be reduced and the fire should be stopped during the baking with big fire.
Example 2
In order to reduce the phenomenon that the zirconium core of the water feeding port of the tundish generates cracks and falls off at the cracks along with the scouring of the molten steel in the pouring process due to the fact that the zirconium core of the water feeding port of the tundish is not baked in place and has low temperature and poor thermal shock resistance when meeting the molten steel after pouring. In the later baking stage of the tundish, the negative pressure fan is arranged on the lower sliding block of the tundish, compressed air is filled, and the negative pressure generated by the compressed air flow is utilized to attract heat in the tundish down, so that the purpose of baking the zirconium core of the upper nozzle of the tundish is achieved, and the using effect of the upper nozzle of the tundish is improved.
Example 3
In the knotting and baking process of the tundish working layer, converter gas is used for baking in the early stage, the thickness of a sintering layer of the tundish working layer is 10-15 mm due to low heat value of the gas, the baking time is 8 hours, if the heat value of the converter gas is low, the baking time is 10 hours, and the knotting quality of the dry material is obviously reduced and the sintering strength is reduced due to low baking temperature. In the using process, the molten steel scouring resistance is reduced, and particularly, after dry materials at the bottom of the ladle are scoured by high-temperature molten steel, the dry materials enter a crystallizer through a tundish water feeding port, so that the liquid level fluctuation of the tundish is stopped. Aiming at the situation, the gas for baking the tundish is changed from coal gas to natural gas, the baking temperature in the knotting process of the tundish is increased, the knotting baking time of the tundish after modification is about 3 hours, and the sintering thickness of the working layer reaches 30-35 mm from 10-15 mm.
Example 4
Improve the little fetal membrane of mouth of a river on the middle package working layer, enlarge the angle and the height of little fetal membrane, ensure to tie a knot and finish back middle package mouth of a river bowl portion intensity of going up, avoid the falling of mouth of a river bowl portion working layer of going up to drop.
Example 5
Split type current regulator is using the later stage, because of connect weak department easily receive molten steel to erode between each position and do not resist the erosion, lead to backplate, current regulator erosion aggravation, change split type current regulator into monolithic, eliminated the installation gap between the two, the anti erosion resistance ability of whole resistant material obviously improves.
Example 6
The dry material of the tundish is completely used instead of the prior bottom material, wall material and slag line material of the tundish, thereby providing the anti-corrosion capability of the bottom of the tundish and reducing the falling of the refractory material.
Before improvement, the physical and chemical indexes of the tundish bottom material and the tundish wall material are as follows:
chemical components: MgO: 42-47%, SiO 2: 40-45%, Al2O 3: 6 to 10 percent;
physical properties: bulk density: not less than 1.9g/cm3, flexural strength: not less than 0.5MPa, compressive strength: not less than 1.0 MPa.
The improved tundish dry material completely uses slag line materials, and the physical and chemical indexes are as follows:
chemical components: MgO: 66-73%, CaO: 1-3%, SiO 2: 3-6%, Al2O 3: 6 to 10 percent;
physical properties: bulk density: not less than 2.1g/cm3, breaking strength: not less than 2.0MPa, compressive strength: not less than 4.0 MPa.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, various changes or modifications may be made by the patentees within the scope of the appended claims, and within the scope of the invention, as long as they do not exceed the scope of the invention described in the claims.
Claims (8)
1. A production method for prolonging the service life of a billet continuous casting tundish is characterized by comprising the following steps:
optimizing a refractory baking curve of the tundish;
a lower air suction device is added in the baking process of the tundish;
the heat value of the knotted baking fuel gas of the tundish working layer is improved;
the middle split type current stabilizer is changed into an integral type;
changing a small tire film of an upper water gap of a tundish working layer into a cone with a thick upper part and a thin lower part;
the dry material of the tundish is changed into slag line material.
2. The production method for prolonging the service life of the billet continuous casting tundish according to the claim 1, wherein the concrete steps of optimizing the baking curve of the tundish refractory material are as follows: and changing the baking mode of the tundish refractory into a baking mode of small fire, medium fire and large fire, and making a baking temperature curve.
3. The production method for prolonging the service life of the continuous casting tundish of the billet according to claim 1, characterized in that: the baking temperature curve formulation rule is as follows: keeping the normal baking bag on soft fire for 1.5 hours, fully opening a gas valve, opening a fan valve to 1/4 degrees, and baking the tundish to 600 ℃;
then, adjusting the middle fire for 1 hour, fully opening a gas valve, opening a fan valve by 1/2 degrees, and baking the tundish to reach 900 ℃;
finally, the fire is turned over for 1.5 hours, the gas valve is fully opened, the fan valve is fully opened, the ladle is baked for 4 hours, the baking temperature of the ladle measured by the post worker is less than 900 ℃, natural gas is mixed, and the natural gas valve 1/4 is opened until the ladle is poured.
4. The production method for prolonging the service life of the continuous casting tundish of the billet according to claim 1, characterized in that: in the baking process of the tundish, the specific steps of adding the down air suction device are as follows: in the later baking stage of the tundish, a lower air suction device is additionally used, the heat in the tundish is sucked down by utilizing the negative pressure generated by the compressed air flow, and the lower air suction device is a negative pressure fan.
5. The production method for prolonging the service life of the continuous casting tundish of the billet according to claim 1, characterized in that: the specific steps of improving the heat value of the knotted baking fuel gas of the tundish working layer are as follows: the gas for baking the tundish is changed from coal gas to natural gas, so that the baking temperature in the knotting process of the tundish is increased.
6. The production method for prolonging the service life of the continuous casting tundish of the billet according to claim 1, characterized in that: the slag line material comprises the following chemical components: MgO: 66-73%, CaO: 1-3%, SiO 2: 3-6%, Al2O 3: 6 to 10 percent.
7. The production method for prolonging the service life of the continuous casting tundish for the billet according to claim 6, wherein the production method comprises the following steps: the physical properties of the slag line material are as follows: bulk density: not less than 2.1g/cm3, breaking strength: not less than 2.0MPa, compressive strength: not less than 4.0 MPa.
8. The production method for prolonging the service life of the continuous casting tundish of the billet according to claim 4, characterized in that: the lower air suction device is arranged in a lower sliding block of the tundish.
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| CN115255305A (en) * | 2022-08-23 | 2022-11-01 | 山东莱钢永锋钢铁有限公司 | Method for baking tundish of continuous casting machine |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102699316A (en) * | 2012-05-10 | 2012-10-03 | 莱芜钢铁集团有限公司 | Beam blank continuous casting machine tundish working lining, construction tire film of working lining and preparation method of working lining |
| CN103791721A (en) * | 2014-02-13 | 2014-05-14 | 山西太钢不锈钢股份有限公司 | Thermal test method of medium-frequency induction furnace |
| CN203972839U (en) * | 2014-03-31 | 2014-12-03 | 莱芜钢铁集团有限公司 | The online oxygen enrichment flash baking device of continuous casting tundish |
| CN204381362U (en) * | 2014-12-19 | 2015-06-10 | 北京利尔高温材料股份有限公司 | A kind of apparatus for baking of continuous casting tundish submerged nozzle |
| KR20190001767A (en) * | 2017-06-28 | 2019-01-07 | (주)포스코켐텍 | Basic Reparing Materials for Tundish |
| CN109454221A (en) * | 2018-12-27 | 2019-03-12 | 山东钢铁集团永锋淄博有限公司 | Improve the course control method for use of tundish work life |
| CN110064741A (en) * | 2019-06-10 | 2019-07-30 | 成渝钒钛科技有限公司 | Continuous cast crystallizer number lift technique in steel-making continuous casting |
| CN112276027A (en) * | 2020-09-14 | 2021-01-29 | 阳春新钢铁有限责任公司 | Casting process for deformed steel bar with low superheat degree |
| CN112517898A (en) * | 2020-09-11 | 2021-03-19 | 南京钢铁股份有限公司 | Continuous casting tundish baking operation method |
-
2022
- 2022-03-18 CN CN202210269640.7A patent/CN114653933B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102699316A (en) * | 2012-05-10 | 2012-10-03 | 莱芜钢铁集团有限公司 | Beam blank continuous casting machine tundish working lining, construction tire film of working lining and preparation method of working lining |
| CN103791721A (en) * | 2014-02-13 | 2014-05-14 | 山西太钢不锈钢股份有限公司 | Thermal test method of medium-frequency induction furnace |
| CN203972839U (en) * | 2014-03-31 | 2014-12-03 | 莱芜钢铁集团有限公司 | The online oxygen enrichment flash baking device of continuous casting tundish |
| CN204381362U (en) * | 2014-12-19 | 2015-06-10 | 北京利尔高温材料股份有限公司 | A kind of apparatus for baking of continuous casting tundish submerged nozzle |
| KR20190001767A (en) * | 2017-06-28 | 2019-01-07 | (주)포스코켐텍 | Basic Reparing Materials for Tundish |
| CN109454221A (en) * | 2018-12-27 | 2019-03-12 | 山东钢铁集团永锋淄博有限公司 | Improve the course control method for use of tundish work life |
| CN110064741A (en) * | 2019-06-10 | 2019-07-30 | 成渝钒钛科技有限公司 | Continuous cast crystallizer number lift technique in steel-making continuous casting |
| CN112517898A (en) * | 2020-09-11 | 2021-03-19 | 南京钢铁股份有限公司 | Continuous casting tundish baking operation method |
| CN112276027A (en) * | 2020-09-14 | 2021-01-29 | 阳春新钢铁有限责任公司 | Casting process for deformed steel bar with low superheat degree |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115255305A (en) * | 2022-08-23 | 2022-11-01 | 山东莱钢永锋钢铁有限公司 | Method for baking tundish of continuous casting machine |
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