CN109628704A - A kind of RH vacuum refining furnace and its building method - Google Patents
A kind of RH vacuum refining furnace and its building method Download PDFInfo
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- CN109628704A CN109628704A CN201910117309.1A CN201910117309A CN109628704A CN 109628704 A CN109628704 A CN 109628704A CN 201910117309 A CN201910117309 A CN 201910117309A CN 109628704 A CN109628704 A CN 109628704A
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- brick
- working lining
- circulating pipe
- pipe
- castable
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
Abstract
The invention discloses a kind of RH vacuum refining furnace and its building methods, belong to the metallurgical external refining masonry technology of resistance to material field.RH vacuum refining furnace mainly includes steel shell, the first insulating brick, the second insulating brick, safe floor castable, working lining wall brick, working lining bottom brick, ramming mass, joint sealing material, circulating pipe, dip pipe.Safe floor substitutes traditional brickwork construction using whole knotting castable, and globality and safety are good；When the temperature distortion of steel shell bottom is repaired, the first insulating brick, the second insulating brick, safe floor castable do not need whole dismountings, long service life；Can be different according to each position melting loss of resistance to material rate, working lining wall brick and safe floor castable thickness are adjusted, resistance to material dosage is reduced；Dip pipe and circulating pipe are an overall structure, are installed using jacking apparatus from bottom, when process replaces dip pipe and circulating pipe, do not need to remove circulating pipe top working lining wall brick, further save resistance to material dosage, reduce costs.
Description
Technical field
The invention belongs to the metallurgical external refining masonry technology of resistance to material fields, and in particular, to a kind of RH vacuum refining furnace and
Its building method.
Background technique
RH SECONDARY REFINING IN A VACUUM CHAMBER originates from the fifties, and nineteen fifty-seven A Erbeide, company applied for vacuum refining of liquid steel degassing method
Technical patent, this is the beginning of vacuum outgas method development, with the exploitation and development of vacuum steel-smelting technology, final RH and VD because
For short processing time, the at low cost, mainstream that can largely handle the advantages that molten steel and become vacuum steel-smelting technology, start the seventies
With the appearance in sequence casting workshop, RH is because using molten steel in the technology of vacuum tank circulation to reach short processing time, efficiency
High, the advantages of capable of being matched with revolving furnace continuous casting and largely used by converter procedure.
Vacuum furnace structure is made of vacuum tank, and a pair of circulating pipe and dip pipe and argon gas pipeline welding.Shell, very
It is built into slack tank with refractory brick, circulating pipe and the effective refractory material casting forming of dipping.
When RH vacuum fine is made steel, dip pipe is immersed in ladle tank, molten steel passes through under argon gas promotion from dip pipe is risen
Circulating pipe flows into vacuum tank, then flows through decline dip pipe through declining circulating pipe out of vacuum tank, flows back in ladle tank, this true
Sky smelts the purity that purpose improves steel, reaches high quality and requires steel.
In existing RH vacuum refining furnace technology, one layer of safe floor is built between vacuum drying oven insulating brick and working lining wall brick
Brick, easy to damage in safe floor brick use process, service life is low, and globality poor, and brickwork joint is more, cannot play good protection
Property；When newly repairing with process replacement dip pipe, dip pipe first is welded from bottom, then circulating pipe is installed down from top, it is complicated for operation,
Large area is needed to remove working lining wall brick simultaneously, circulating pipe could be installed, and material consumption is serious；Vacuum furnace bottom flange distortion or
Damage when needing replacing, needs all to remove insulating layer brick, safe floor brick, waste of material is serious.
Summary of the invention
The purpose of the present invention is to provide a kind of RH vacuum refining furnace and its building methods, can reduce RH vacuum refining furnace
Refractory consumption improves service life, and mitigates labor intensity when replacement dip pipe and circulating pipe.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of RH vacuum refining furnace flows into or out device including the vacuum furnace device being located above and underlying steel, institute
Stating vacuum furnace device includes the steel shell set gradually from outside to inside, the first insulating brick, the second insulating brick, safe floor and working lining
Wall brick, the steel shell are the shells of entire RH vacuum melting furnace, and the lower end of the steel shell is fixed with herringbone flange；The steel
The inside of shell, which is built, first heat-insulated turn, and the inside of first insulating brick, which is built, the second insulating brick, second insulating brick
Inner distance the second insulating brick inner surface 50-60mm at build have working lining wall brick, the second thermal insulation layer and working lining
It is filled between wall brick using safe floor castable；
It includes working lining bottom brick, ramming mass, joint sealing material, circulating pipe, dip pipe, the working lining that the steel, which flows into or out device,
Bottom brick is built is filled with ramming mass between the side of circulating pipe, the working lining bottom brick and circulating pipe；The circulating pipe it is upper
Portion and work wall brick are fitted close, and the dip pipe is built in the lower section of circulating pipe, and the dip pipe and circulating pipe are integral
The peripheral clearance of structure, the circulating pipe is filled with joint sealing material；The circulating pipe positioned at left side forms steel with dip pipe and flows into
Mouthful, the circulating pipe and dip pipe positioned at right side form steel outflux.
Further, the castable of the safe floor castable is corundum pouring material, and raw material forms critical granularity 5-
8mm pours thickness >=50mm.
Further, the contact surface of the circulating pipe and dip pipe is connected and fixed using ratcheting fashion.
Further, the joint sealing material is corundum material, amount of water 5-6%.
Further, the working lining wall brick, working lining bottom brick are magnesia-spinel brick or magnesite-chrome brick.
A kind of RH vacuum refining furnace building method, includes the following steps:
Step S1, dip pipe and circulating pipe are assembled into an overall structure, dip pipe upper end lining brick and circulating pipe lower end are adopted
It is connected and fixed with ratcheting fashion；
Step S2, using jacking apparatus, assembled dip pipe and circulating pipe are installed and is welded and fixed from steel shell bottom
On the herringbone flange of steel shell；
Step S3, circulating pipe peripheral clearance is tamped using joint sealing material；
Step S4, the first insulating brick, the second insulating brick and working lining bottom brick are built, is protected between working lining bottom brick and circulating pipe
The gap 60-80mm is held, gap is consolidated using ramming mass；
Step S5, working lining wall brick is built, the gap 50-60mm is kept between working lining wall brick and the second insulating brick；
Step S6, working lining wall brick and the gap of the second insulating brick are tamped using corundum safe floor castable, safe floor
Castable raw material forms critical granularity 3-5mm, completes overhaul and builds, come into operation after baking, completes the block of RH vacuum melting furnace
It builds.
Beneficial effects of the present invention:
1, safe floor is integrally knotted using corundum castable substitutes traditional brickwork construction, and the service life is enhanced about more than once, and just
Beautiful castable price is lower than the price of brick, and cost reduces；
2, operational layer brick is first built, then pours safe floor castable, it can be according to the resistance to material use environment in each position and melting loss
Rate is different, adjusts working lining wall brick and safe floor castable thickness, saves resistance to material dosage；
3, dip pipe and circulating pipe are fabricated to an overall structure, are installed using jacking apparatus from bottom, process replacement leaching
When stain pipe and circulating pipe, does not need to remove circulating pipe top operational layer brick, masonry is also reduced while saving resistance to material dosage
Labor intensity.
Detailed description of the invention
In order to facilitate the understanding of those skilled in the art, the present invention will be further described below with reference to the drawings.
Fig. 1 is a kind of structural schematic diagram of RH vacuum refining furnace of the present invention；
Figure label: 1- steel shell, the first insulating brick of 2-, the second insulating brick of 3-, 4- safe floor castable, 5- working lining wall
Brick, 6- working lining bottom brick, 7- ramming mass, 8- joint sealing material, 9- circulating pipe, 10- dip pipe, 11- herringbone flange.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with embodiment, it is clear that described reality
Applying example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is general
Logical technical staff all other embodiment obtained without creative efforts belongs to what the present invention protected
Range.
A kind of RH vacuum refining furnace, as shown in Figure 1, including that the vacuum furnace device being located above and underlying steel flow into
Device out, vacuum furnace device include the steel shell 1 set gradually from outside to inside, the first insulating brick 2, the second insulating brick 3, safe floor 4,
With working lining wall brick 5, steel shell 1 is the shell of entire RH vacuum melting furnace, and the lower end of steel shell 1 is fixed with herringbone flange 11；
The inside of steel shell 1, which is built, first heat-insulated turn 2, and the inside of the first insulating brick 2, which is built, the second insulating brick 3, the second insulating brick 3
Building at 3 inner surface 50-60mm of the second insulating brick of inner distance has working lining wall brick 5, second thermal insulation layer 3 and working lining wall brick
It is filled between 5 using safe floor castable 4, safe floor castable 4 substitutes traditional brickwork construction using whole knotting castable,
Globality and safety are good；Preferably, the castable of safe floor castable 4 is corundum pouring material, and raw material forms critical granularity
5-8mm, good flowing properties pour thickness >=50mm；The building method of working lining wall brick 5, safe floor castable 4 are as follows: first build
Working lining wall brick 5, then safe floor castable 4 is poured, it so can be different with melting loss rate according to the resistance to material use environment in each position,
The thickness for adjusting working lining wall brick 5 and safe floor castable 4, reduces resistance to material dosage；
When 1 bottom temperature distortion of steel shell is repaired, the castable of safe floor 4 does not need whole dismountings, long service life；
It includes working lining bottom brick 6, ramming mass 7, joint sealing material 8, circulating pipe 9, dip pipe 10, working lining bottom that steel, which flows into or out device,
Brick 6 is built is filled with ramming mass 7 between the side of circulating pipe 9, working lining bottom brick 6 and circulating pipe 9；The top of circulating pipe 9 with
Working lining 5 is fitted close, and dip pipe 10, which is built, is integral structure, ring in the lower section of circulating pipe 9, dip pipe 10 and circulating pipe 9
Flow tube 9 is connect with the contact surface (the bottom end lining brick of dip pipe 10 upper end lining brick and circulating pipe 9) of dip pipe 10 using ratcheting fashion
Fixed, globality is strong；The peripheral clearance of circulating pipe 9 is filled with joint sealing material 8, joint sealing material 8 is corundum material, amount of water 5-6%；
Circulating pipe 9 and dip pipe 10 positioned at left side form steel and flow into mouth, and the circulating pipe 9 and dip pipe 10 positioned at right side form steel outflow
Mouthful, when RH vacuum fine is made steel, dip pipe 10 is immersed in molten steel color tank, molten steel passes through under argon gas promotion from left side dip pipe 10
It crosses left side circulating pipe 9 to flow into vacuum tank, then flows through right side dip pipe 10 through right side circulating pipe 9 out of vacuum tank, flow back to molten steel
It in packet tank, is recycled one time by 30 minutes 260 tons of molten steel, improves the purity of steel, reached high quality and require steel；
Dip pipe 10 and circulating pipe 9 are an overall structure, are installed using jacking apparatus from bottom, process replaces dip pipe
10 and when circulating pipe 9, it does not need to remove 9 top operational layer brick of circulating pipe, further saves resistance to material dosage, reduce into
This；
Working lining wall brick 5, working lining bottom brick 6 are magnesia-spinel brick or magnesite-chrome brick；
RH vacuum refining furnace building method, includes the following steps:
Step S1, dip pipe 10 and circulating pipe 9 are assembled into an overall structure, 10 upper end lining brick of dip pipe and circulating pipe 9
Lower end is connected and fixed using ratcheting fashion；
Step S2, using jacking apparatus, assembled dip pipe 10 and circulating pipe 9 are installed and is welded from 1 bottom of steel shell
It is fixed on the herringbone flange 11 of steel shell 1；
Step S3,9 peripheral clearance of circulating pipe is tamped using joint sealing material 8；
Step S4, the first insulating brick 2, the second insulating brick 3 and working lining bottom brick 6, working lining bottom brick 6 and circulating pipe 9 are built
Between keep the gap 60-80mm, gap is consolidated using ramming mass 7；
Step S5, working lining wall brick 5 is built, the gap 50-60mm is kept between working lining wall brick 5 and the second insulating brick 3；
Step S6, working lining wall brick 5 and the gap of the second insulating brick 3 are tamped using corundum safe floor castable 4, safety
Layer 4 raw material of castable forms critical granularity 3-5mm, completes overhaul and builds, come into operation after baking, completes RH vacuum melting furnace
It builds；
Wherein, main to replace circulating pipe 9 and dip pipe 10, replacement when being built by laying in RH vacuum refining furnace later period use process
It is identical that method and RH vacuum refining furnace repair method entirely, does not need to remove 9 top working lining wall brick 5 of circulating pipe；
1 bottom of steel shell is because heated be deformed, and when repairing and replacing, safe floor castable 4 is not required to remove, and the service life mentions
It is high.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment
All details are described, are not limited the invention to the specific embodiments described.Obviously, according to the content of this specification,
It can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to better explain the present invention
Principle and practical application, so that skilled artisan be enable to better understand and utilize the present invention.The present invention is only
It is limited by claims and its full scope and equivalent.
Claims (6)
1. a kind of RH vacuum refining furnace, which is characterized in that flowed into including the vacuum furnace device being located above and underlying steel
Device out, the vacuum furnace device include the steel shell (1) set gradually from outside to inside, the first insulating brick (2), the second insulating brick
(3), safe floor castable (4) and working lining wall brick (5), the steel shell (1) are the shell of entire RH vacuum melting furnace, the steel
The lower end of shell (1) is fixed with herringbone flange (11)；The inside of the steel shell (1), which is built, to be had first heat-insulated turn (2), and described the
The inside of one insulating brick (2), which is built, to be had the second insulating brick (3), the second insulating brick of inner distance (3) of second insulating brick (3)
Building at inner surface 50-60mm has working lining wall brick (5), uses between the second thermal insulation layer (3) and working lining wall brick (5)
Safe floor castable (4) filling；
It includes working lining bottom brick (6), ramming mass (7), joint sealing material (8), circulating pipe (9), dip pipe that the steel, which flows into or out device,
(10), the working lining bottom brick (6) builds between the side of circulating pipe (9), the working lining bottom brick (6) and circulating pipe (9)
Filled with ramming mass (7)；The top and working lining (5) of the circulating pipe (9) are fitted close, and the dip pipe (10) builds in ring
The lower section of flow tube (9), the dip pipe (10) and circulating pipe (9) are integral structure, and the peripheral clearance of the circulating pipe (9) is filled out
Filled with joint sealing material (8)；Steel is formed positioned at the circulating pipe (9) in left side and dip pipe (10) and flows into mouth, described in right side
Circulating pipe (9) and dip pipe (10) form steel outflux.
2. a kind of RH vacuum refining furnace according to claim 1, which is characterized in that the safe floor castable (4) is rigid
Beautiful matter castable, raw material form critical granularity 5-8mm, pour thickness >=50mm.
3. a kind of RH vacuum refining furnace according to claim 1, which is characterized in that the circulating pipe (9) and dip pipe
(10) contact surface is connected and fixed using ratcheting fashion.
4. a kind of RH vacuum refining furnace according to claim 1, which is characterized in that the joint sealing material (8) is corundum material,
Amount of water 5-6%.
5. a kind of RH vacuum refining furnace according to claim 1, which is characterized in that the working lining wall brick (5), working lining
Bottom brick (6) is magnesia-spinel brick or magnesite-chrome brick.
6. a kind of RH vacuum refining furnace building method, which comprises the steps of:
Step S1, dip pipe (10) and circulating pipe (9) are assembled into an overall structure, dip pipe (10) upper end lining brick and circulating pipe
(9) lower end is connected and fixed using ratcheting fashion；
Step S2, using jacking apparatus, assembled dip pipe (10) and circulating pipe (9) are installed and is welded from steel shell (1) bottom
It connects on the herringbone flange (11) for being fixed on steel shell (1)；
Step S3, circulating pipe (9) peripheral clearance is tamped using joint sealing material (8)；
Step S4, the first insulating brick (2), the second insulating brick (3) and working lining bottom brick (6), working lining bottom brick (6) and circulation are built
It manages and keeps the gap 60-80mm between (9), gap is consolidated using ramming mass (7)；
Step S5, working lining wall brick (5) are built, the gap 50-60mm is kept between working lining wall brick (5) and the second insulating brick (3)；
Step S6, working lining wall brick (5) and the gap of the second insulating brick (3) are tamped using corundum safe floor castable (4), are pacified
Holostrome castable (4) raw material forms critical granularity 3-5mm, completes overhaul and builds, come into operation after baking, completes RH vacuum melting
The masonry of furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910117309.1A CN109628704B (en) | 2019-02-15 | 2019-02-15 | RH vacuum refining furnace and building method thereof |
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| CN201910117309.1A CN109628704B (en) | 2019-02-15 | 2019-02-15 | RH vacuum refining furnace and building method thereof |
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| CN109628704A true CN109628704A (en) | 2019-04-16 |
| CN109628704B CN109628704B (en) | 2020-11-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113894923A (en) * | 2021-09-30 | 2022-01-07 | 营口市瑞福来耐火材料有限公司 | Integral forming production method of dip pipe and integral forming dip pipe |
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| CN109628704B (en) | 2020-11-17 |
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