CN110579108B - Method for building supporting roof of steelmaking mixer - Google Patents

Method for building supporting roof of steelmaking mixer Download PDF

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Publication number
CN110579108B
CN110579108B CN201910820993.XA CN201910820993A CN110579108B CN 110579108 B CN110579108 B CN 110579108B CN 201910820993 A CN201910820993 A CN 201910820993A CN 110579108 B CN110579108 B CN 110579108B
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CN
China
Prior art keywords
scaffold
arch
channel steel
bricks
furnace
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Application number
CN201910820993.XA
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Chinese (zh)
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CN110579108A (en
Inventor
刘俊
李颖奇
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Xinxing Ductile Iron Pipes Co Ltd
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Xinxing Ductile Iron Pipes Co Ltd
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Priority to CN201910820993.XA priority Critical patent/CN110579108B/en
Publication of CN110579108A publication Critical patent/CN110579108A/en
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Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21CPROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C1/00Refining of pig-iron; Cast iron
    • C21C1/06Constructional features of mixers for pig-iron
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00Casings; Linings; Walls; Roofs
    • F27D1/16Making or repairing linings increasing the durability of linings or breaking away linings
    • F27D1/1621Making linings by using shaped elements, e.g. bricks
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00Casings; Linings; Walls; Roofs
    • F27D1/16Making or repairing linings increasing the durability of linings or breaking away linings
    • F27D1/1694Breaking away the lining or removing parts thereof
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

Abstract

The invention discloses a method for building a supporting roof of a steelmaking mixer, which relates to the technical field of furnace body maintenance and building, and aims at solving the problems that the existing steelmaking mixer is wasted when being disassembled and built again and the construction wastes time, the following scheme is proposed, and the method comprises the following steps: s1, prefabricating arch channel steel, wherein the radian of the arch channel steel is consistent with that of an arch crown, the span is slightly smaller than the horizontal distance between the two lining plates, and the arch channel steel is distributed along the transverse direction of the furnace at equal intervals; s2, inserting a plurality of supporting channel steel above the arch channel steel to enable the supporting channel steel to prop against the arch-top brick; s3, erecting a full scaffold under the arch channel steel, and reinforcing and prolonging the length of the scaffold by using jackscrews under the scaffold; and S4, removing bricks from the furnace bottom, and moving one scaffold when the bricks are removed to the scaffold position. The invention is convenient for construction, and the whole arch crown brick which is not seriously worn can be conveniently reused, thereby saving the expenditure and shortening the construction period.

Description

Method for building supporting roof of steelmaking mixer
Technical Field
The invention relates to the technical field of furnace body maintenance and masonry, in particular to a method for building a supporting roof of a steelmaking mixer.
Background
The service life of refractory bricks in a furnace of the steelmaking mixer furnace is 14 months, wherein the bricks with serious abrasion and corrosion are bottom bricks and straight-section wall bricks in the furnace, and the bricks in the furnace are completely dismantled from top to bottom and then rebuilt from bottom to top after each inspection and maintenance, so that the working efficiency is low, and the arch top bricks which are not seriously abraded are also dismantled and rebuilt at the same time to cause certain waste.
Disclosure of Invention
The invention provides a method for building a supporting roof of a steelmaking mixer, which solves the problems that the existing steelmaking mixer is wasted when being disassembled and built again and the construction is time-consuming.
In order to achieve the purpose, the invention adopts the following technical scheme: a method for building a supporting roof of a steelmaking mixer comprises the following steps:
s1, prefabricating arch channel steel, wherein the radian of the arch channel steel is consistent with that of an arch crown, the span is slightly smaller than the horizontal distance between the two lining plates, and the arch channel steel is distributed at equal intervals along the transverse direction of the furnace;
s2, inserting a plurality of supporting channel steel above the arch channel steel to enable the supporting channel steel to prop against the arch-top brick;
s3, erecting a full scaffold under the arch channel steel, and reinforcing and prolonging the length of the scaffold by using jackscrews under the scaffold;
s4, removing bricks at the bottom of the furnace, moving a scaffold when the scaffold is removed to the position of the scaffold, using jackscrews to extend the scaffold after refractory bricks are removed and erecting the scaffold on a furnace skin, and removing wall bricks to the lower part of the lining plate after all furnace bottom bricks are removed in sequence;
and S5, building bricks after the waste bricks and sundries in the furnace are cleaned up, and pouring the castable after the bricks are built to the lower part of the lining plate according to the same principle as the step S4, so that the full framing is ensured to be firmly reinforced all the time during the dismantling and building.
Preferably, the vertical section of the support channel steel is of a U-shaped structure, and the lining plate is a steel plate and has a thickness of 30 mm.
Preferably, straight-section wall bricks are laid on two sides of the full framing scaffold.
Preferably, a filling pouring material is arranged between the inner lining plates and is in contact with the arch top brick and the straight-section wall brick.
Preferably, one side of the straight-section wall brick is provided with a discharge hole.
The invention provides structures such as supporting channel steel, arch channel steel, lining plates and full framing scaffolds, the full framing is used for supporting, the height of the full framing is adjusted, construction is facilitated, arch crown bricks which are not seriously worn can be reused, expenditure is saved, and the construction period is shortened.
Drawings
FIG. 1 is a schematic sectional view of a furnace body according to the method for constructing a supporting roof of a steelmaking mixer furnace according to the present invention;
FIG. 2 is a schematic top view of a vault support of the method for constructing a supporting roof of a steelmaking mixer according to the present invention.
In the figure: 1 furnace bottom brick, 2 straight section wall bricks, 3 arch crown bricks, 4 supporting channel steel, 5 arch channel steel, 6 interior welt, 7 filling pouring materials, 8 full framing scaffold, 9 discharge gates.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
Examples of the embodiments
The method comprises the steps of prefabricating arch-shaped channel steel 5, enabling the radian of the arch-shaped channel steel 5 to be consistent with the arch crown, enabling the span to be slightly smaller than the horizontal distance of two lining plates 6, enabling the length to be 2.5m, enabling the arch-shaped channel steel 5 to be distributed along the transverse distance of a furnace by one distance of 3m, inserting a plurality of supporting channel steel 4 above the arch-shaped channel steel 5 to enable the supporting channel steel to prop against an arch crown brick 3, erecting full framing scaffolds 8 below the arch-shaped channel steel 5 at an interval of 500mm, reinforcing and prolonging the length of the scaffolds by using a jackscrew below the scaffolds, dismounting bricks at the furnace bottom, moving one scaffold when the position of the scaffold is dismounted, using the jackscrew to extend the scaffold after a refractory brick is dismounted, erecting the scaffold on a furnace skin, dismounting all the bottom bricks in sequence, then dismounting the wall bricks to the lower part of the lining plates 6, starting brick laying after waste bricks and sundries in the furnace are cleaned up, and adopting the same principle, the whole dismantling and building process can save the construction period by 10 days.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (5)

1. A method for building a supporting roof of a steelmaking mixer furnace is characterized by comprising the following steps:
s1, prefabricating arch channel steel (5), wherein the radian of the arch channel steel (5) is consistent with that of an arch crown, the span is slightly smaller than the horizontal distance of the two lining plates (6), and the arch channel steel (5) are distributed at equal intervals along the transverse direction of the furnace;
s2, inserting a plurality of supporting channel steel (4) above the arch channel steel (5) to enable the supporting channel steel to prop against the arch-top brick (3);
s3, erecting a full hall scaffold (8) below the arch-shaped channel steel (5), and reinforcing and prolonging the length of the scaffold by using jackscrews below the scaffold;
s4, removing bricks at the bottom of the furnace, moving a scaffold when the scaffold is removed to the position of the scaffold, using jackscrews to extend the scaffold after refractory bricks are removed, erecting the scaffold on a furnace skin, removing all the bottom bricks (1) in sequence and then removing wall bricks to the position below the lining plate (6);
and S5, building bricks after the waste bricks and sundries in the furnace are cleaned up, and pouring materials are poured after the bricks are built to the position below the lining plate (6) according to the same principle as the step S4, so that the full framing scaffold (8) is firmly reinforced all the time during the dismantling and building processes.
2. The method for laying the supporting roof of the steelmaking mixer according to claim 1, wherein the vertical section of the supporting channel (4) is a U-shaped structure, and the inner lining plate (6) is a steel plate and has a thickness of 30 mm.
3. The method for laying the supporting roof of the steelmaking mixer furnace as claimed in claim 1, wherein the straight wall bricks (2) are laid on both sides of the full framing scaffold (8).
4. A method for laying a supporting roof of a steelmaking mixer according to claim 3, characterised in that a filling casting (7) is provided between the inner lining plates (6), and the filling casting (7) is in contact with the crown block (3) and the straight wall blocks (2).
5. A method for laying a supporting roof of a steelmaking mixer as claimed in claim 3, characterised in that the side of the straight wall brick (2) is provided with a discharge outlet (9).
CN201910820993.XA 2019-09-02 2019-09-02 Method for building supporting roof of steelmaking mixer Active CN110579108B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910820993.XA CN110579108B (en) 2019-09-02 2019-09-02 Method for building supporting roof of steelmaking mixer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910820993.XA CN110579108B (en) 2019-09-02 2019-09-02 Method for building supporting roof of steelmaking mixer

Publications (2)

Publication Number Publication Date
CN110579108A CN110579108A (en) 2019-12-17
CN110579108B true CN110579108B (en) 2021-02-23

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Application Number Title Priority Date Filing Date
CN201910820993.XA Active CN110579108B (en) 2019-09-02 2019-09-02 Method for building supporting roof of steelmaking mixer

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Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103673621B (en) * 2013-12-13 2015-06-17 五矿二十三冶建设集团有限公司 Construction method for spherical furnace top of industrial furnace
CN104848693B (en) * 2015-06-09 2017-02-22 中国十九冶集团有限公司 Quick construction method for lining layer of heating furnace
CN107090971A (en) * 2017-06-14 2017-08-25 中国五冶集团有限公司 A kind of method and apparatus for quick and precisely installing flue arch top template
CN206928642U (en) * 2017-06-15 2018-01-26 中建五局土木工程有限公司 A kind of safety and environmental protection movable formwork support
CN108678258A (en) * 2018-06-20 2018-10-19 中国建筑局(集团)有限公司 Large span hemispherical armored concrete dome structure and its construction method

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