CN111185588B - Construction method of dry-type material tundish air curtain retaining wall - Google Patents
Construction method of dry-type material tundish air curtain retaining wall Download PDFInfo
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- CN111185588B CN111185588B CN202010119699.9A CN202010119699A CN111185588B CN 111185588 B CN111185588 B CN 111185588B CN 202010119699 A CN202010119699 A CN 202010119699A CN 111185588 B CN111185588 B CN 111185588B
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- retaining wall
- air curtain
- curtain retaining
- blowing pipe
- argon blowing
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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
- B22D41/02—Linings
- B22D41/023—Apparatus used for making or repairing linings
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Abstract
The invention discloses a construction method of a dry-type material tundish air curtain retaining wall. Firstly, manufacturing an air curtain retaining wall steel mould with an embedding groove and an argon blowing pipe steel mould with an embedding groove, wherein the materials embedded in the two moulds are both thin foams; respectively embedding thin foams at two sides of two steel moulds, respectively placing the two moulds embedded with the thin foam plates at designed positions, and aligning the top center points of the two moulds; then installing a current stabilizer, paving a bottom and placing a tire membrane, pouring a bag wall material, vibrating, compacting and baking; then removing the tire membrane, and then dismantling the two molds; removing the mould after dismantling, and then paving and installing an air curtain retaining wall; then connecting an argon blowing pipe, smearing a streamline shape at the argon blowing pipe of the tundish wall air curtain retaining wall and around the air curtain retaining wall, and finally cleaning the surface of the air curtain retaining wall to finish installation; and finally, naturally drying, online baking and using after baking. The construction method greatly reduces the labor intensity of workers and improves the construction efficiency.
Description
The technical field is as follows:
the invention relates to a construction method, in particular to a construction method of a dry-type material tundish air curtain retaining wall.
Secondly, background art:
the tundish is the last container in the steelmaking process, and the tundish metallurgy is also an important link in the steelmaking process and has great influence on the cleanliness of molten steel. The tundish gas curtain retaining wall has the functions of prolonging the retention time of molten steel, promoting inclusion floating, increasing the probability of inclusion collision and growth so as to promote floating, and also has the functions of a vacuum pump, removing nitrogen, hydrogen, oxygen and the like in the molten steel. Therefore, the application of the air curtain retaining wall in the tundish plays an important role in cleaning steel. Can be divided into to scribble package, spraying package and dry-type material package with the middle package according to the construction method difference of middle package, the construction of scribbling package and spraying material package air curtain barricade is comparatively simple, is about to place in predesigned locating position after air curtain barricade and the argon blowing union coupling, scribble, the spraying can. The construction of the dry-type material package air curtain retaining wall is complicated, the air curtain retaining wall cannot be directly placed at the bottom of a package and vibrated by a dry material, the air curtain retaining wall can be damaged in the vibration heating process due to the fact that a tundish tire membrane is arranged in the middle of the dry material, a steel mold of the air curtain retaining wall and a steel mold of an argon blowing pipe are required to be placed at a pre-designed position in the middle of the dry material, then a current stabilizer is installed, the bottom of the package is paved, the tire membrane is arranged, the dry material is poured into the package for vibration forming, after the tire membrane is baked and removed by the vibration forming, the air curtain retaining wall mold needs to be manually removed, the baked tundish is high in temperature, the smell generated by volatilization of a binding agent and bad working environment, in addition, the dry material strength is high after baking, the expansion reason of the channel steel mold is baked, the large in combination strength of the channel steel mold and the dry material leads to large labor intensity of mold removal of workers, and meanwhile, the construction efficiency is low.
Thirdly, the invention content:
the technical problem to be solved by the invention is as follows: aiming at the defects of the construction method of the dry-type material tundish air curtain retaining wall in the prior art, the invention provides the construction method of the dry-type material tundish air curtain retaining wall, which has low labor intensity and high construction efficiency.
In order to solve the problems, the invention adopts the technical scheme that:
the invention provides a construction method of a dry-type material tundish air curtain retaining wall, which comprises the following steps:
a. firstly, manufacturing an air curtain retaining wall steel mould with an embedding groove and an argon blowing pipe steel mould with an embedding groove, wherein the materials embedded in the two steel moulds with the embedding grooves are both thin foams;
b. respectively embedding thin foams at two sides of an air curtain retaining wall steel mould and an argon blowing pipe steel mould, respectively placing the air curtain retaining wall mould and the argon blowing pipe mould embedded with the thin foam plates at the pre-designed positions of the air curtain retaining wall, placing the air curtain retaining wall mould, and then placing the argon blowing pipe mould, wherein the central points of the top ends of the two moulds are aligned to prevent the two moulds from inclining;
c. then installing a current stabilizer, paving a bottom and placing a tire membrane, pouring a bag wall material for vibration, and baking after compaction;
d. removing the moulding bed after baking, and then removing the air curtain retaining wall die and the argon blowing pipe die (because the foam shrinkage air curtain retaining wall die is easy to remove, the construction efficiency is improved, and the labor intensity is reduced);
e. then, removing the waste left in the groove after the die is removed, paving the waste by using a dry material, and installing an air curtain retaining wall after paving;
f. connecting an argon blowing pipe after the gas curtain retaining wall is installed, smearing the argon blowing pipe of the tundish wall gas curtain retaining wall and the periphery of the gas curtain retaining wall into a streamline shape by using smearing materials, and finally cleaning the surface of the gas curtain retaining wall to finish installation;
g. and after the installation, the product is naturally dried, then is subjected to online baking, and is used after being baked.
According to the construction method of the dry-type material tundish air curtain retaining wall, the specification size of the steel mould of the air curtain retaining wall in the step a is (960-; the specification size of the argon blowing pipe steel mould is (1200-1300mm) × 50mm × 50 mm.
According to the construction method of the dry-type material tundish air curtain retaining wall, the size of the embedded foam for the air curtain retaining wall mold in the step a is (960 + 1200mm) × 50mm × 15 mm; the size of the mosaic foam for the argon blowing pipe mould is (1200-1300 mm). times.50 mm. times.15 mm.
According to the construction method of the air curtain retaining wall of the dry-type material tundish, in the step c, the baking temperature is 180-220 ℃ and the baking time is 2-4 h (preferably, the baking temperature is 200 ℃ and the baking time is 3 h).
According to the construction method of the dry-type material tundish air curtain retaining wall, the natural drying time in the step g is 6-8 hours.
According to the construction method of the air curtain retaining wall of the dry-type material tundish, in the step g, the baking temperature is 1000-1300 ℃ and the baking time is 2-4 h (preferably 1200 ℃ and 3h) during online baking.
The invention has the following positive beneficial effects:
according to the invention, the thin foams with the thickness of 15mm are embedded on two sides of the channel steel mould to replace a pure steel mould, the thin foams shrink and volatilize after the dry material is vibrated and baked, the channel steel is separated from the dry material after the tire mold is removed, the strength and the service performance of the dry material are not influenced, the mould is easy to operate when a worker removes the mould, the labor intensity of the worker is greatly reduced, and the construction efficiency is improved.
In conclusion, the construction method has the advantages of simple construction, high construction efficiency, easy mold dismantling and the like, so that the prior art problem that the mold is difficult to dismantle due to mold expansion after the air curtain retaining wall mold is dried is solved, the labor intensity of workers at high temperature is reduced, and the construction efficiency is improved.
Fourthly, explanation of the attached drawings:
FIG. 1 is a top view, a side view and a view showing a mosaic groove of a steel mold for an air curtain retaining wall with mosaic grooves according to example 1 of the present invention (each of the drawings is a schematic view);
FIG. 2 is a schematic view of a die for argon-blown tube steel with an insert pocket according to example 1 of the present invention, which is shown in the top view, the side view and the insert pocket (each of the drawings is a schematic view);
FIG. 3 is a top view and a side view (each schematically shown) of a steel mold insert foam plate for an air curtain retaining wall with an insert groove according to example 1 of the present invention;
FIG. 4 is a top view and a side view (each schematically shown) of an inlaid foam sheet for a steel mold for an argon-blowing tube with an inlaid groove according to the present invention;
FIG. 5 is a schematic view showing a dry tundish structure with an air curtain retaining wall mold and an argon blowing pipe mold installed in accordance with example 1 of the present invention;
fig. 6 is a schematic view of a dry-type material tundish structure of which the gas curtain retaining wall is installed after the gas curtain retaining wall mold and the argon blowing pipe mold are removed in embodiment 1 of the present invention.
The fifth embodiment is as follows:
the invention is further illustrated by the following examples, which do not limit the scope of the invention.
Example 1:
the invention relates to a construction method of a dry-type material tundish air curtain retaining wall, which comprises the following detailed steps:
a. firstly, manufacturing two steel moulds with embedding grooves, namely an air curtain retaining wall steel mould with the embedding grooves and an argon blowing pipe steel mould with the embedding grooves, wherein materials embedded in the two steel moulds with the embedding grooves are both thin foams;
the specification size of the air curtain retaining wall steel mould is 1200mm multiplied by 130mm multiplied by 50 mm; the specification and the size of the argon blowing pipe steel mould are 1300mm multiplied by 50 mm;
the size of the mosaic foam for the air curtain retaining wall mold is 1200mm multiplied by 50mm multiplied by 15 mm; the size of the mosaic foam for the argon blowing pipe mould is 1300mm multiplied by 50mm multiplied by 15 mm;
b. respectively embedding thin foams at two sides of an air curtain retaining wall steel mould and an argon blowing pipe steel mould, respectively placing the air curtain retaining wall mould and the argon blowing pipe mould embedded with the thin foam plates at the pre-designed positions of the air curtain retaining wall, placing the air curtain retaining wall mould, and then placing the argon blowing pipe mould, wherein the central points of the top ends of the two moulds are aligned to prevent the two moulds from inclining;
c. then installing a current stabilizer, paving a bottom, placing a tire membrane, pouring a bag wall material for vibration, and baking after jolt compaction (the baking temperature is 200 ℃, and the baking time is 3 hours);
d. removing the moulding bed after baking, and then removing the air curtain retaining wall die and the argon blowing pipe die (because the foam shrinkage air curtain retaining wall die is easy to remove, the construction efficiency is improved, and the labor intensity is reduced);
e. then, removing the waste left in the groove after the die is removed, paving the waste by using a dry material, and installing an air curtain retaining wall after paving;
f. connecting an argon blowing pipe after the gas curtain retaining wall is installed, smearing the argon blowing pipe of the tundish wall gas curtain retaining wall and the periphery of the gas curtain retaining wall into a streamline shape by using smearing materials, and finally cleaning the surface of the gas curtain retaining wall to finish installation;
g. and (3) naturally drying after installation, wherein the natural drying time is 8h, and after natural drying, performing online baking (the baking temperature is 1200 ℃ and the baking time is 3h), and baking for use.
Example 2:
the invention relates to a construction method of a dry-type material tundish air curtain retaining wall, which comprises the following detailed steps:
a. firstly, manufacturing two steel moulds with embedding grooves, namely an air curtain retaining wall steel mould with the embedding grooves and an argon blowing pipe steel mould with the embedding grooves, wherein materials embedded in the two steel moulds with the embedding grooves are both thin foams;
the specification size of the air curtain retaining wall steel mould is 1100mm multiplied by 130mm multiplied by 50 mm; the specification size of the argon blowing pipe steel mould is 1200mm multiplied by 50 mm;
the size of the embedded foam for the air curtain retaining wall mold is 1100mm multiplied by 50mm multiplied by 15 mm; the size of the mosaic foam for the argon blowing pipe mould is 1200mm multiplied by 50mm multiplied by 15 mm;
b. respectively embedding thin foams at two sides of an air curtain retaining wall steel mould and an argon blowing pipe steel mould, respectively placing the air curtain retaining wall mould and the argon blowing pipe mould embedded with the thin foam plates at the pre-designed positions of the air curtain retaining wall, placing the air curtain retaining wall mould, and then placing the argon blowing pipe mould, wherein the central points of the top ends of the two moulds are aligned to prevent the two moulds from inclining;
c. then installing a current stabilizer, paving a bottom, placing a tire membrane, pouring a bag wall material for vibration, and baking after jolt compaction (the baking temperature is 210 ℃, and the baking time is 2.5 hours);
d. removing the moulding bed after baking, and then removing the air curtain retaining wall die and the argon blowing pipe die (because the foam shrinkage air curtain retaining wall die is easy to remove, the construction efficiency is improved, and the labor intensity is reduced);
e. then, removing the waste left in the groove after the die is removed, paving the waste by using a dry material, and installing an air curtain retaining wall after paving;
f. connecting an argon blowing pipe after the gas curtain retaining wall is installed, smearing the argon blowing pipe of the tundish wall gas curtain retaining wall and the periphery of the gas curtain retaining wall into a streamline shape by using smearing materials, and finally cleaning the surface of the gas curtain retaining wall to finish installation;
g. and (3) naturally drying after installation, wherein the natural drying time is 8h, and after natural drying, performing online baking (the baking temperature is 1300 ℃ and the baking time is 2h), and baking for use.
Claims (4)
1. A construction method of a dry-type material tundish air curtain retaining wall is characterized by comprising the following steps:
a. firstly, manufacturing an air curtain retaining wall steel mould with an embedding groove and an argon blowing pipe steel mould with an embedding groove, wherein the materials embedded in the two steel moulds with the embedding grooves are both thin foams;
the specification size of the air curtain retaining wall steel mould is (960-; the specification size of the argon blowing pipe steel mould is (1200-1300mm) × 50mm × 50 mm;
the size of the embedded foam for the air curtain retaining wall mold is (960-; the size of the embedding foam for the argon blowing pipe mould is (1200-1300mm) × 50mm × 15 mm;
b. respectively embedding thin foams at two sides of an air curtain retaining wall steel mould and an argon blowing pipe steel mould, respectively placing the air curtain retaining wall mould and the argon blowing pipe mould embedded with the thin foam plates at the pre-designed positions of the air curtain retaining wall, placing the air curtain retaining wall mould, and then placing the argon blowing pipe mould, wherein the central points of the top ends of the two moulds are aligned to prevent the two moulds from inclining;
c. then installing a current stabilizer, paving a bottom and placing a tire membrane, pouring a bag wall material for vibration, and baking after compaction;
d. removing the moulding bed after baking, and then removing the air curtain retaining wall die and the argon blowing pipe die;
e. then, removing the waste left in the groove after the die is removed, paving the waste by using a dry material, and installing an air curtain retaining wall after paving;
f. connecting an argon blowing pipe after the gas curtain retaining wall is installed, smearing the argon blowing pipe of the tundish wall gas curtain retaining wall and the periphery of the gas curtain retaining wall into a streamline shape by using smearing materials, and finally cleaning the surface of the gas curtain retaining wall to finish installation;
g. and after the installation, the product is naturally dried, then is subjected to online baking, and is used after being baked.
2. The construction method of the dry-type material tundish air curtain retaining wall according to claim 1, characterized in that: in the step c, the baking temperature is 180-220 ℃, and the baking time is 2-4 h.
3. The construction method of the dry-type material tundish air curtain retaining wall according to claim 1, characterized in that: and g, naturally drying for 6-8 hours.
4. The construction method of the dry-type material tundish air curtain retaining wall according to claim 1, characterized in that: and g, baking at 1000-1300 ℃ for 2-4 h in the online baking.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010119699.9A CN111185588B (en) | 2020-02-26 | 2020-02-26 | Construction method of dry-type material tundish air curtain retaining wall |
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| CN202010119699.9A CN111185588B (en) | 2020-02-26 | 2020-02-26 | Construction method of dry-type material tundish air curtain retaining wall |
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| CN111185588B true CN111185588B (en) | 2021-12-28 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61259867A (en) * | 1985-05-11 | 1986-11-18 | Kawasaki Steel Corp | Method for lining vessel for molten metal by castable refractories for pouring |
| CN202639315U (en) * | 2012-05-10 | 2013-01-02 | 莱芜钢铁集团有限公司 | Sketch blank continuous caster tundish working lining and construction embryonic membrane thereof |
| CN107214327A (en) * | 2017-07-14 | 2017-09-29 | 山东钢铁股份有限公司 | A kind of continuous casting production bar shaped air curtain barricade wall and its installation method |
| CN209632115U (en) * | 2019-02-20 | 2019-11-15 | 山东钢铁股份有限公司 | A kind of annular air curtain barricade wall and Argon metallurgical plant for ladle |
| CN111822690A (en) * | 2020-07-25 | 2020-10-27 | 莱芜钢铁集团银山型钢有限公司 | Ladle argon blowing upper nozzle pocket brick and preparation method thereof |
-
2020
- 2020-02-26 CN CN202010119699.9A patent/CN111185588B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61259867A (en) * | 1985-05-11 | 1986-11-18 | Kawasaki Steel Corp | Method for lining vessel for molten metal by castable refractories for pouring |
| CN202639315U (en) * | 2012-05-10 | 2013-01-02 | 莱芜钢铁集团有限公司 | Sketch blank continuous caster tundish working lining and construction embryonic membrane thereof |
| CN107214327A (en) * | 2017-07-14 | 2017-09-29 | 山东钢铁股份有限公司 | A kind of continuous casting production bar shaped air curtain barricade wall and its installation method |
| CN209632115U (en) * | 2019-02-20 | 2019-11-15 | 山东钢铁股份有限公司 | A kind of annular air curtain barricade wall and Argon metallurgical plant for ladle |
| CN111822690A (en) * | 2020-07-25 | 2020-10-27 | 莱芜钢铁集团银山型钢有限公司 | Ladle argon blowing upper nozzle pocket brick and preparation method thereof |
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| CN111185588A (en) | 2020-05-22 |
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