CN106623883A - Integral pouring process for large steel ladle - Google Patents
Integral pouring process for large steel ladle Download PDFInfo
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- CN106623883A CN106623883A CN201611156473.6A CN201611156473A CN106623883A CN 106623883 A CN106623883 A CN 106623883A CN 201611156473 A CN201611156473 A CN 201611156473A CN 106623883 A CN106623883 A CN 106623883A
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- Prior art keywords
- castable
- ladle
- layer
- containment wall
- permanent
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Classifications
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ceramic Products (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The invention relates to an integral pouring process for a large steel ladle, and belongs to the technical field of steel-making. The integral pouring process comprises the steps that (1) a self-adhesive nano-ceramic insulation board is used as a steel ladle wall insulating layer; (2) low-cement and high-aluminum combined castable and semi-lightweight high-aluminum castable is used for a steel ladle permanent safety layer wholly, low-cement and high-aluminum combined castable is used for a ladle bottom, and semi-lightweight high-aluminum castable is used for a ladle wall; and (3) low-cement and high-strength high-slag resistant corundum spinel combined castable is used for a ladle wall working layer, and adopted for integral pouring is conducted in a bottom-wall separation mode. The pouring process is good in safety, high in melting loss resistance, small in molten steel pollution, good in insulating performance, capable of reducing energy consumption, long in service life, low in cost and convenient in construction.
Description
Technical field
The present invention relates to a kind of integrated poured technique of large ladle furnace, and in particular to for production technology be converter-
CAS-LF-CCM or converter-CAS-LF-RH-CCM are applied to the integrated poured work of the large ladle furnace of 210 tons and the above
Skill, belongs to steelmaking technical field.
Background technology
The existing 210 tons of converters 2 in 210 regions of Ji steel steel mill, average tap about 220t, Steel ladle clearance is 400-
700mm, dominating process route：Converter-CAS-LF-CCM, converter-CAS-LF-RH-CCM, converter-CAS-CCM tri-
Kind, more than 50%, liquid steel temperature scope 1530-1630 DEG C (wherein walks the molten steel LF out-station temperatures of LF+RH routes to RH handling rates
1600-1630 DEG C), CAS 15-25min of process time, LF refining process time about 35-60min, RH refining treatment cycles
35-50min, 50-60min of continuous-casting steel pouring cycle.At present ladle integrally uses the longevity to build by laying bricks or stones based on magnesia carbon brick and aluminium-magnesia carbon brick
About 80 stoves of life.
The content of the invention
It is an object of the invention to provide a kind of integrated poured technique of large ladle furnace, the present invention improves ladle security
Can, ton steel cost is reduced, optimize brick-building art.Technical scheme is as follows：
A kind of integrated poured technique of large ladle furnace, technique is as follows：
(1) ladle wall heat-insulation layer adopts self-adhering-type nano ceramics heat-insulating shield, good heat insulating；
(2) ladle permanent secure layer integrally combines high alumina castable and half light high alumina castable using low cement, and bag bottom is adopted
High alumina castable is combined with low cement, containment wall is using half light high alumina castable, and it is convenient to construct；
(3) containment wall working lining adopts low cement combined high-strength, high resistance to slag corundum spinel castable, integrated poured to adopt
Separated with diapire and poured into a mould, can effectively prevent from wrapping bottom and containment wall seam crossing bleed-out, increase the security that ladle is used.
Of the invention integrated poured technique is comprised the following steps that：
(1) heat-insulation layer construction：Self-adhering-type warming plate is pasted onto into ladle shell inwall using chamotte, it is ensured that the fiber of stickup with
Containment wall is firmly combined with；Warming plate adopts self-adhering-type nano ceramics heat-insulating shield；
(2) construction of permanent secure layer：Bag bottom permanent secure layer casting and constructing, bag bottom combines high alumina casting using low cement
Material, adds water by the amount of 3-5% (mass fraction), and the material adds water to stir every time and discharge after 3-5min；In casting process, using shake
Dynamic rod carries out horizontal vibrating.After bag bottom permanent layer has been poured intensity (pressing pressure motionless), the loose tool for placing into permanent layer enters
The construction of row containment wall permanent layer, containment wall need to carry out centering using half light high alumina castable, permanent layer loose tool, it is ensured that indentured permanent layer
Thickness is uniform and up to standard；Preferably, wrap bottom and high alumina castable is combined using low cement, add water by the amount of 4% (mass fraction)；More
Preferably, the material adds water to stir every time and discharge after 4min；
(3) working lining construction：First according to slag line brick masonry number of rings, working lining cast height is determined；Then by working lining
Fetal membrane centering is positioned, it is ensured that fetal membrane is placed steady and fixed, it is to avoid loosen in use；Working lining is combined using low cement
High intensity, high resistance to slag corundum spinel castable, castable amount of water is 4-6% (mass fraction), and castable adds water every time
Could discharge after stirring, it is ensured that material flowability meets execution conditions；The construction of working lining containment wall needs to stand health after finishing
24 hours, when small powder harden to press pressure it is motionless when, carry out the demoulding, the demoulding will confirm after finishing to containment wall situation.Pouring ladle
During the working lining of bottom, vibrations process need to be carried out to castable；During vibrations, shock club is forbidden to laterally pull wherein, it is to avoid to produce empty
Hole；Preferably, slag line brick masonry number of rings is set as 8-11 rings；Working lining adopts low cement combined high-strength, high resistance to slag corundum
Spinel pouring material, castable amount of water is 5% (mass fraction)；
(4) build by laying bricks or stones before residue pile, containment wall castable face is polished flat with sander, then smear one layer of thin chamotte and look for
Flat, the gap of brick need to control within 1.5mm, to close tweel block and be placed on left side gudgeon direction；Bag need to adopt thickness 20- along pressing plate
The steel plate of 25mm, spacing is 200mm between each steel plate, and is entered using the triangular steel of thickness 20-25mm every piece of steel plate bottom
Row is reinforced, and requires every piece of steel plate both sides full weld；Preferably, bag along pressing plate need to adopt thickness 23mm steel plate, each steel plate it
Between spacing be 200mm, and reinforced using the triangular steel of thickness 23mm every piece of steel plate bottom；
(5) construction of the tank along castable：Tank is used after mould overlay film, tank presses 3-5%'s (mass fraction) along material
Amount adds water (hold not dissipate by hand and be defined)；The demoulding after tank is sufficiently hardened along material and to form intensity.Preferably, tank presses 4% (matter along material
Amount fraction) amount add water.
The present invention has compared with prior art advantages below：
(1) security is good：Molten bath position is overall knotting, and material overall performance is good, gap being likely to result in without laying bricks etc.
Hidden danger, security reliability is high.
(2) anti-melting loss is strong, and molten steel pollution is few：Using high-performance aluminum magnesia spinel system castable, anti-erosion is good, and ladle holds
Product change is little, and charge weight is stable, and molten steel pollution is few, it is to avoid carburetting, is conducive to improving the cleanliness factor of molten steel.
(3) good heat insulating, can saving energy consumption：Overall ladle employs rational thermal insulation layer and permanent layer is designed, containment wall,
Carbon-free material is selected at bag bottom, and thermal conductivity factor is low, and ladle temperature drop is slow, and clad temperature can be saved within 280 DEG C in the whole bag labour phase
More than power consumption 0.5kwh/t.
(4) life-span length, low cost：Integrated poured knotting material repeatedly circulating sleeve can be poured and used, the life-span more than 120 stoves,
Cost ratio builds ladle reduction by laying bricks or stones.
(5) it is convenient to construct：Overall knotting steel ladle full adopts casting and constructing, and the work for greatly alleviating Field Force is strong
Degree.
Specific embodiment
Further describe the present invention with reference to specific embodiment, advantages of the present invention and feature will be with description and
It is apparent.But embodiment is only exemplary, does not constitute any restriction to the scope of the present invention.Those skilled in the art should
It should be appreciated that, the details of technical solution of the present invention and form can be repaiied without departing from the spirit and scope of the invention
Change or replace, but these modifications and replacement are each fallen within protection scope of the present invention.
A kind of integrated poured technique of the large ladle furnace of embodiment 1
Comprise the following steps that：
(1) heat-insulation layer construction：Self-adhering-type warming plate is pasted onto into ladle shell inwall using chamotte, it is ensured that the fiber of stickup with
Containment wall is firmly combined with；Warming plate adopts self-adhering-type nano ceramics heat-insulating shield；
(2) construction of permanent secure layer：Bag bottom permanent secure layer casting and constructing, bag bottom combines high alumina casting using low cement
Material, adds water by the amount of 4% (mass fraction), and the material adds water to stir every time and discharge after 4min；In casting process, using shock club
Carry out horizontal vibrating.After bag bottom permanent layer has been poured intensity (pressing pressure motionless), the loose tool for placing into permanent layer is wrapped
The construction of wall permanent layer, containment wall need to carry out centering using half light high alumina castable, permanent layer loose tool, it is ensured that indentured permanent layer thickness
It is uniform and up to standard；
(3) working lining construction：First according to slag line brick masonry number of rings, slag line brick masonry number of rings is set as 10 rings, working lining
It is poured into the lowermost layer of 10 ring residue piles；Then the centering of working lining fetal membrane is positioned, it is ensured that fetal membrane is placed steady and fixed, it is to avoid
Loosen in use；Working lining adopts low cement combined high-strength, high resistance to slag corundum spinel castable, castable to add
The water yield is 5% (mass fraction), and castable adds water every time after stirring and could discharge, it is ensured that material flowability meets construction bar
Part；The construction of working lining containment wall needs to stand health 24 hours after finishing, when small powder harden to press pressure it is motionless when, carry out the demoulding, the demoulding
Containment wall situation is confirmed after finishing.During the working lining of pouring ladle bottom, vibrations process need to be carried out to castable；During vibrations, sternly
Prohibit shock club to laterally pull wherein, it is to avoid produce cavity；
(4) build by laying bricks or stones before residue pile, containment wall castable face is polished flat with sander, then smear one layer of thin chamotte and look for
Flat, the gap of brick need to control within 1.5mm, to close tweel block and be placed on left side gudgeon direction；Bag need to adopt thickness 23mm along pressing plate
Steel plate, spacing is 200mm between each steel plate, and is reinforced using the triangular steel of thickness 23mm every piece of steel plate bottom,
And require every piece of steel plate both sides full weld；
(5) construction of the tank along castable：Tank is used after mould overlay film, tank is along material by the amount of 4% (mass fraction)
Add water (hold not dissipate by hand and be defined)；The demoulding after tank is sufficiently hardened along material and to form intensity.
A kind of integrated poured technique of the large ladle furnace of embodiment 2
Comprise the following steps that：
(1) heat-insulation layer construction：Self-adhering-type warming plate is pasted onto into ladle shell inwall using chamotte, it is ensured that the fiber of stickup with
Containment wall is firmly combined with；Warming plate adopts self-adhering-type nano ceramics heat-insulating shield；
(2) construction of permanent secure layer：Bag bottom permanent secure layer casting and constructing, bag bottom combines high alumina casting using low cement
Material, adds water by the amount of 3% (mass fraction), and the material adds water to stir every time and discharge after 3.5min；In casting process, using vibrations
Rod carries out horizontal vibrating；After bag bottom permanent layer has been poured intensity (pressing pressure motionless), placing into the loose tool of permanent layer is carried out
The construction of containment wall permanent layer, containment wall need to carry out centering using half light high alumina castable, permanent layer loose tool, it is ensured that indentured permanent thickness
Degree is uniform and up to standard；
(3) working lining construction：First according to slag line brick masonry number of rings, slag line brick masonry number of rings is set as 8 rings, and working lining is poured
Note to the lowermost layer of 8 ring residue piles；Then the centering of working lining fetal membrane is positioned, it is ensured that fetal membrane is placed steady and fixed, it is to avoid
Loosen during use；Working lining adopts low cement combined high-strength, high resistance to slag corundum spinel castable, castable to add water
Measure as 4.5% (mass fraction), castable adds water every time after stirring and could discharge, it is ensured that material flowability meets construction bar
Part；The construction of working lining containment wall needs to stand health 24 hours after finishing, when small powder harden to press pressure it is motionless when, carry out the demoulding, the demoulding
Containment wall situation is confirmed after finishing；During the working lining of pouring ladle bottom, vibrations process need to be carried out to castable；During vibrations, sternly
Prohibit shock club to laterally pull wherein, it is to avoid produce cavity；
(4) build by laying bricks or stones before residue pile, containment wall castable face is polished flat with sander, then smear one layer of thin chamotte and look for
Flat, the gap of brick need to control within 1.5mm, to close tweel block and be placed on left side gudgeon direction；Bag need to adopt thickness 20mm along pressing plate
Steel plate, spacing is 200mm between each steel plate, and is reinforced using the triangular steel of thickness 20mm every piece of steel plate bottom,
And require every piece of steel plate both sides full weld；
(5) construction of the tank along castable：Tank is used after mould overlay film, tank is along material by 3.5% (mass fraction)
Amount adds water (hold not dissipate by hand and be defined)；The demoulding after tank is sufficiently hardened along material and to form intensity.
A kind of integrated poured technique of the large ladle furnace of embodiment 3
Comprise the following steps that：
(1) heat-insulation layer construction：Self-adhering-type warming plate is pasted onto into ladle shell inwall using chamotte, it is ensured that the fiber of stickup with
Containment wall is firmly combined with；Warming plate adopts self-adhering-type nano ceramics heat-insulating shield；
(2) construction of permanent secure layer：Bag bottom permanent secure layer casting and constructing, bag bottom combines high alumina casting using low cement
Material, adds water by the amount of 4.5% (mass fraction), and the material adds water to stir every time and discharge after 5min；In casting process, using vibrations
Rod carries out horizontal vibrating.After bag bottom permanent layer has been poured intensity (pressing pressure motionless), placing into the loose tool of permanent layer is carried out
The construction of containment wall permanent layer, containment wall need to carry out centering using half light high alumina castable, permanent layer loose tool, it is ensured that indentured permanent thickness
Degree is uniform and up to standard；
(3) working lining construction：First according to slag line brick masonry number of rings, slag line brick masonry number of rings is set as 11 rings, working lining
It is poured into the lowermost layer of 11 ring residue piles；Then the centering of working lining fetal membrane is positioned, it is ensured that fetal membrane is placed steady and fixed, it is to avoid
Loosen in use；Working lining adopts low cement combined high-strength, high resistance to slag corundum spinel castable, castable to add
The water yield is 6% (mass fraction), and castable adds water every time after stirring and could discharge, it is ensured that material flowability meets construction bar
Part；The construction of working lining containment wall needs to stand health 24 hours after finishing, when small powder harden to press pressure it is motionless when, carry out the demoulding, the demoulding
Containment wall situation is confirmed after finishing.During the working lining of pouring ladle bottom, vibrations process need to be carried out to castable；During vibrations, sternly
Prohibit shock club to laterally pull wherein, it is to avoid produce cavity；
(4) build by laying bricks or stones before residue pile, containment wall castable face is polished flat with sander, then smear one layer of thin chamotte and look for
Flat, the gap of brick need to control within 1.5mm, to close tweel block and be placed on left side gudgeon direction；Bag need to adopt thickness 24mm along pressing plate
Steel plate, spacing is 200mm between each steel plate, and is reinforced using the triangular steel of thickness 24mm every piece of steel plate bottom,
And require every piece of steel plate both sides full weld；
(5) construction of the tank along castable：Tank is used after mould overlay film, tank is along material by the amount of 5% (mass fraction)
Add water (hold not dissipate by hand and be defined)；The demoulding after tank is sufficiently hardened along material and to form intensity.
In the present invention, ladle heat insulation thermal insulation layer is more than 1200 heats；Permanent secure layer is more than 1200 heats；Working lining is more than
150 heats.
Claims (8)
1. the integrated poured technique of a kind of large ladle furnace, it is characterised in that the integrated poured technique of large ladle furnace is as follows：
(1) ladle wall heat-insulation layer adopts self-adhering-type nano ceramics heat-insulating shield；
(2) ladle permanent secure layer integrally combines high alumina castable and half light high alumina castable using low cement, and bag bottom is using low
Cement combines high alumina castable, and containment wall is using half light high alumina castable；
(3) containment wall working lining adopts low cement combined high-strength, high resistance to slag corundum spinel castable, integrated poured employing bottom
Wall separates cast.
2. integrated poured technique according to claim 1, it is characterised in that pouring technology is comprised the following steps that：
(1) heat-insulation layer construction：Self-adhering-type warming plate is pasted onto into ladle shell inwall using chamotte, it is ensured that the fiber and containment wall of stickup
It is firmly combined with；Warming plate adopts self-adhering-type nano ceramics heat-insulating shield；
(2) construction of permanent secure layer：Bag bottom permanent secure layer casting and constructing, bag bottom combines high alumina castable using low cement,
Add water by the amount of 3-5% (mass fraction), the material adds water to stir every time and discharge after 3-5min；In casting process, using vibrations
Rod carries out horizontal vibrating；After bag bottom permanent layer has been poured intensity (pressing pressure motionless), placing into the loose tool of permanent layer is carried out
The construction of containment wall permanent layer, containment wall need to carry out centering using half light high alumina castable, permanent layer loose tool, it is ensured that indentured permanent thickness
Degree is uniform and up to standard；
(3) working lining construction：First according to slag line brick masonry number of rings, working lining cast height is determined；Then by working lining fetal membrane
Centering is positioned, it is ensured that fetal membrane is placed steady and fixed, it is to avoid loosen in use；Working lining is combined high-strength using low cement
Degree, high resistance to slag corundum spinel castable, castable amount of water is 4-6% (mass fraction), and castable adds water every time stirring
Could discharge after uniform, it is ensured that material flowability meets execution conditions；The construction of working lining containment wall needs standing health 24 little after finishing
When, when small powder harden to press pressure it is motionless when, carry out the demoulding, the demoulding will confirm after finishing to containment wall situation；Pouring ladle basic skill or training
When making layer, vibrations process need to be carried out to castable；During vibrations, shock club is forbidden to laterally pull wherein, it is to avoid to produce cavity；
(4) build by laying bricks or stones before residue pile, containment wall castable face is polished flat with sander, it is levelling then to smear one layer of thin chamotte, brick
Gap need to control within 1.5mm, close tweel block and be placed on left side gudgeon direction；Wrapping need to adopt thickness 20-25mm's along pressing plate
Steel plate, spacing is 200mm between each steel plate, and is reinforced using the triangular steel of thickness 20-25mm every piece of steel plate bottom,
And require every piece of steel plate both sides full weld；
(5) construction of the tank along castable：Tank is used after mould overlay film, tank is added along material by the amount of 3-5% (mass fraction)
Water (is held not dissipate by hand and is defined)；The demoulding after tank is sufficiently hardened along material and to form intensity.
3. integrated poured technique according to claim 2, it is characterised in that bag bottom adopts low cement in the step (2)
With reference to high alumina castable, add water by the amount of 4% (mass fraction).
4. integrated poured technique according to claim 2, it is characterised in that low cement combines high alumina in the step (2)
Castable adds water to stir every time and discharge after 4min.
5. integrated poured technique according to claim 2, it is characterised in that slag line brick masonry number of rings in the step (3)
It is set as 8-11 rings.
6. integrated poured technique according to claim 2, it is characterised in that working lining adopts low water in the step (3)
Mud combined high-strength, high resistance to slag corundum spinel castable, castable amount of water is 5% (mass fraction).
7. integrated poured technique according to claim 2, it is characterised in that bag needs to adopt along pressing plate in the step (4)
The steel plate of thickness 23mm, spacing is 200mm between each steel plate, and is entered using the triangular steel of thickness 23mm every piece of steel plate bottom
Row is reinforced.
8. integrated poured technique according to claim 2, it is characterised in that tank presses 4% along material in the step (5)
The amount of (mass fraction) adds water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611156473.6A CN106623883A (en) | 2016-12-14 | 2016-12-14 | Integral pouring process for large steel ladle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611156473.6A CN106623883A (en) | 2016-12-14 | 2016-12-14 | Integral pouring process for large steel ladle |
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ID=58823491
Family Applications (1)
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| CN201611156473.6A Pending CN106623883A (en) | 2016-12-14 | 2016-12-14 | Integral pouring process for large steel ladle |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109628704A (en) * | 2019-02-15 | 2019-04-16 | 安徽鑫海环保新材料股份有限公司 | A kind of RH vacuum refining furnace and its building method |
| CN110935871A (en) * | 2020-01-02 | 2020-03-31 | 新余钢铁股份有限公司 | Steel ladle structure and manufacturing method thereof |
| CN111390151A (en) * | 2020-04-26 | 2020-07-10 | 郑州银河耐火材料有限公司 | Steel ladle double-ring masonry structure and construction method thereof |
| CN116372150A (en) * | 2023-05-31 | 2023-07-04 | 亿川科技(成都)有限责任公司 | Automatic construction and beating system and method for ladle maintenance |
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| CN203356583U (en) * | 2013-06-25 | 2013-12-25 | 宝山钢铁股份有限公司 | Accessory type integrally-poured permanent lining structure for wall of steel ladle |
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| CN106111966A (en) * | 2016-06-24 | 2016-11-16 | 巩义市红旗炉料有限公司 | A kind of compound permanent ladle layer construction method |
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| JPH01122659A (en) * | 1987-11-06 | 1989-05-15 | Kawasaki Steel Corp | Protection of permanent lining internal insulation of molten metal container |
| CN1919499A (en) * | 2005-08-22 | 2007-02-28 | 崔东瑞 | Ladle neck bush pouring technique |
| CN202845769U (en) * | 2012-11-22 | 2013-04-03 | 攀钢集团西昌钢钒有限公司 | Heat-preserving steel ladle lining and steel ladle |
| CN203356583U (en) * | 2013-06-25 | 2013-12-25 | 宝山钢铁股份有限公司 | Accessory type integrally-poured permanent lining structure for wall of steel ladle |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109628704A (en) * | 2019-02-15 | 2019-04-16 | 安徽鑫海环保新材料股份有限公司 | A kind of RH vacuum refining furnace and its building method |
| CN110935871A (en) * | 2020-01-02 | 2020-03-31 | 新余钢铁股份有限公司 | Steel ladle structure and manufacturing method thereof |
| CN111390151A (en) * | 2020-04-26 | 2020-07-10 | 郑州银河耐火材料有限公司 | Steel ladle double-ring masonry structure and construction method thereof |
| CN116372150A (en) * | 2023-05-31 | 2023-07-04 | 亿川科技(成都)有限责任公司 | Automatic construction and beating system and method for ladle maintenance |
| CN116372150B (en) * | 2023-05-31 | 2023-09-08 | 亿川科技(成都)有限责任公司 | Automatic construction and beating system and method for ladle maintenance |
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