CN106345977A - Secondary cooling method and device of high-speed small square billet or small round billet continuous casting machine - Google Patents
Secondary cooling method and device of high-speed small square billet or small round billet continuous casting machine Download PDFInfo
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- CN106345977A CN106345977A CN201611072852.7A CN201611072852A CN106345977A CN 106345977 A CN106345977 A CN 106345977A CN 201611072852 A CN201611072852 A CN 201611072852A CN 106345977 A CN106345977 A CN 106345977A
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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
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
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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
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould
- B22D11/225—Controlling or regulating processes or operations for cooling cast stock or mould for secondary cooling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The invention discloses a secondary cooling method and device of a high-speed small square billet or small round billet continuous casting machine. The method is concretely characterized in that a secondary cooling region is divided into a plurality of guide sections; a plurality of guide sections with the front ends connected with a crystallizer adopt closely arranged roller structures; the rest guide sections adopt single-roller support structures; then, the secondary cooling region is divided into a plurality of cooling sections; the plurality of cooling sections at the front end adopt water spraying nozzles for casting blank cooling, and the rest cooling sections adopt air mist spray nozzles for casting blank cooling. Through section division for corresponding arrangement, the casting blank secondary cooling technology is enabled to meet the requirement of high drawing speed; the problems of great bulging deformation, poor cooling intensity, poor cooling control precision, poor uniformity, high space region temperature returning and the like under the condition of high drawing speed are solved; particularly, the drawing speed is improved; meanwhile, the investment cost and the production operation cost of the continuous casting machine can also be obviously reduced; wide market and application prospects are realized.
Description
Technical field
The invention belongs to metallurgical continuous casting field is and in particular to a kind of high speed small billet or little round billet continuous casting machine cooling twice side
Method and device.
Background technology
In field of metallurgy, billet caster is conventional conticaster the most traditional, for rolling wire and rod, screw-thread steel etc.
Construction(al)steel provides raw material, and the market share accounts for more than 30% of conticaster on market.Billet caster pulling rate is universal at present
Not high, for 150mm × 150mm side routine continuous small-billet casting pulling rate overwhelming majority between 2.0～3.5m/min, separate unit fluxion
Many, ton steel production and operation high cost.And improve billet caster pulling rate, it is possible to reduce conticaster fluxion, reduces simultaneously and builds
Investment and production and operation cost.For 150mm × 150mm side's routine continuous small-billet casting, if pulling rate improves to 4.5m/min, flow
Number can reduce 1/3, and investment and production and operation cost can reduce by 20%, if pulling rate improves to 7m/min or higher, or even can
To realize small billet single current or Double flow high efficiency continuous casting and rolling, the cost of very big Jiang Di iron and steel enterprise, meet high speed continuous small-billet casting
Machine green low-carbon, high-efficiency environment friendly require, significant to iron and steel enterprise.
Small billet, after crystallizer solidification shrinkage forms green shell, need to carry out cooling twice in two cold guide sections and be allowed to complete
Solidification, Secondary Cooling affects the bulge deformation of strand, the quality problems such as uniformly cooling, shrinkage cavity be loose, is high speed small billet
The key core technology that can realize.At present, conventional small billet secondary cooling apparatus are as shown in figure 1, two cold guide sections are all adopted
With wide arc gap independence support roller and crystallizer foot roll quantity only 1 is discharged to 2 rows, the fermented soya beans, salted or other wise tripe deformation for strand can not be carried out well
Control, di-cold spray nozzle arranging distance larger amt is less, and all low pressure aerial fog nozzles, intensity of cooling is not enough, two cold subregions
For 4 areas, cooling control and regulation precision is not high, and therefore, it is little that conventional small billet secondary cooling apparatus can not meet production high speed
The requirement of square billet.
Content of the invention
In view of this, it is an object of the invention to provide a kind of high speed small billet or little round billet continuous casting machine secondary cooling method
And device, effective control and solve small billet occur in the case of high pulling rate bulge deformation, intensity of cooling deficiency, lack of homogeneity,
The problems such as air cooling section length is short.
For reaching above-mentioned purpose, the present invention provides following technical scheme: a kind of high speed small billet or little round billet continuous casting machine two
Secondary cooling means, comprises the following steps:
1) secondary cooling zone is divided into multiple guide sections successively along casting direction, front end connect with crystallizer several lead
Adopt solid matter roll structure to section, remaining each guide section is all using single roller supporting construction；
2) again secondary cooling zone is divided into multiple cooling sections successively along casting direction, several cooling sections of front end adopt water
Nozzle carries out slab cooling, and remaining each cooling section all carries out slab cooling using aerial fog nozzle.
Further, described step 2) in, (operating) water nozzle adopts high pressure nozzle or normal pressure nozzle；During using high pressure nozzle, work
Stress control is 0.1～2.0mpaa, and when (operating) water nozzle adopts normal pressure nozzle, operating pressure is controlled to 0.1～0.7mpaa.
Further, described step 1) in, when each guide section is all using single roller supporting construction, in the setting of crystallizer Xia Kou position
2～8 to sufficient roller.
Further, cooling twice is distinguished into 5～10 cooling sections, is followed successively by water cooling section along casting direction, aerosol is cold
But section and air cooling section.
Further, along strand width, several groups of guide means is set in secondary cooling zone, and controls air cooling section
Angle between two side nozzles and jet face normal orientation.
A kind of high speed small billet or little round billet continuous casting machine secondary cooling apparatus, including crystallizer and being arranged on below crystallizer
Secondary cooling zone, described secondary cooling zone is divided into multiple guide sections successively along casting direction, if the guide section positioned at front end has
Dry using solid matter roll structure and each solid matter roll structure is arranged in below crystallizer successively along casting direction, and remaining each guide section is equal
Using single roller supporting construction；Described secondary cooling zone is divided into multiple cooling sections successively along casting direction, on each cooling section two sides
It is laid with (operating) water nozzle and aerial fog nozzle successively, or be laid with aerial fog nozzle successively.
Further, in described secondary cooling zone, strand width is provided with several groups of guide means.
Further, described cooling section has 5～10 sections, is followed successively by water cooling section, aerosol cooling section and air along casting direction
Cooling section；In described air cooling section, the angle between the nozzle of both sides and jet face normal orientation is 0～80 °.
Further, it is provided with M-emss in described crystallizer.
Further, it is provided with freezing end-point magnetic stirrer in described secondary cooling zone.
The beneficial effects of the present invention is: by classifying rationally guide section and cooling section, and Reasonable Arrangement close packed roller and spray
Mouth, both ensure that strand Secondary Cooling disclosure satisfy that the demand of high pulling rate, the drum occurring in the case of again solving high pulling rate
Tripe deforms the problems such as larger, intensity of cooling is weaker, cooling control accuracy and uniformity are poor, and space region rises again higher, especially exists
Pulling rate can also significantly reduce investment and the production and operation cost of conticaster while raising, have market widely and answer
Use prospect.
Brief description
In order that the purpose of the present invention, technical scheme and beneficial effect are clearer, the present invention provides drawings described below to carry out
Illustrate:
Fig. 1 is conventional small billet secondary cooling apparatus schematic diagram；
Fig. 2 is the secondary cooling apparatus schematic diagram of the present invention；
Fig. 3 is air cooling section nozzle schematic diagram.
Specific embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
Embodiment one
A kind of high speed billet caster secondary cooling method and device, molten steel solidification shrinkage side of being formed in crystallizer 1
Shaped cast base, being full of molten steel surface inside strand is one layer of thin stock shell, enters secondary cooling zone afterwards, makes internal molten steel complete by liquid
It is changed into solid-state and form solid strand；Casting blank section specification is 100～250mm × 100～250mm, and casting speed controls 2.5
～8m/min.
1) secondary cooling zone is divided into four guide sections successively along casting direction strand is supported and to guide, positioned at front
The first two guide section held and connect with crystallizer adopts little roll neck close packed roller structure 2, and strand inner arc, outer arc, left and right sides are entered
Row supports and guides, and effectively reduces the bulge deformation of strand, other two guide section is all using wide arc gap list roller supporting construction 3；
2) again secondary cooling zone is divided into eight cooling sections successively along casting direction, at each cooling section, corresponding solid matter is provided with
Nozzle, four cooling sections of front end carry out strand cooling twice using (operating) water nozzle, and the cooling section at rear portion is carried out using aerial fog nozzle
Strand cooling twice.Wherein, (operating) water nozzle can adopt high pressure nozzle or normal pressure nozzle；During using high pressure nozzle, operating pressure controls
For 0.8mpaa, when (operating) water nozzle adopts normal pressure nozzle, operating pressure is controlled to 0.3mpaa.
By classifying rationally cooling section hop count, Reasonable Arrangement nozzle, can achieve to strand each position cooling water inflow accurately, have
The regulation of effect and control；The preferred hop count of cooling section is 5～10 sections, and more cooling section hop count can reduce the water in single region
Amount, thus accurate effective control adjusts the cooling water inflow at each position of strand, obtains good intensity of cooling and cooling effect.
In the present embodiment, secondary cooling zone is followed successively by water cooling section, aerosol cooling section and air cooling section along casting direction,
Wherein, in described air cooling section, the angle α between the nozzle 4 of cooling section both sides and jet face normal orientation is 20～50 °, leads to
Cross control angle angle, air cooling section length can be reduced.
In the present embodiment, strand width is provided with two groups of guiding mechanisms, so that centering guiding is carried out to strand；With
When, it is provided with M-emss 5 at crystallizer 1, be located in secondary cooling zone at casting blank solidification end and be additionally provided with solidification end
End magnetic stirrer 6, magnetic stirrer herein can not configure according to the steel grade type selecting that conticaster produces, be separately configured or
All configure, to meet the demand producing straight carbon steel and variety steel, special steel.
Embodiment two
A kind of little round billet continuous casting machine secondary cooling method of high speed and device, solidification shrinkage forms circle to molten steel in a crystallizer
Strand, being full of molten steel surface inside strand is one layer of thin stock shell, enters secondary cooling zone afterwards, so that internal molten steel is turned completely by liquid
It is changed into solid-state and form solid strand；Casting blank section specification is 100～250mm, and casting speed controls in 2.5～8m/min.
1) secondary cooling zone is divided into four guide sections successively along casting direction strand is supported and to guide, positioned at front
First guide section held and connect with crystallizer adopts little roll neck close packed roller structure, and strand inner arc, outer arc, left and right sides are carried out
Support and guide, effectively reduce the bulge deformation of strand, its excess-three guide section is all using wide arc gap list roller supporting construction；
2) again secondary cooling zone is divided into six cooling sections successively along casting direction, at each cooling section, corresponding solid matter is provided with
Nozzle, three cooling sections of front end carry out strand cooling twice using (operating) water nozzle, and the cooling section at rear portion is carried out using aerial fog nozzle
Strand cooling twice.Wherein, (operating) water nozzle can adopt high pressure nozzle or normal pressure nozzle；During using high pressure nozzle, operating pressure controls
For 1.4mpaa, when (operating) water nozzle adopts normal pressure nozzle, operating pressure is controlled to 0.5mpaa.
In the present embodiment, secondary cooling zone is followed successively by water cooling section, aerosol cooling section and air cooling section along casting direction,
Wherein, in described air cooling section, the angle α between the nozzle of cooling section both sides and jet face normal orientation is 40～70 °, passes through
Control angle angle, air cooling section length can be reduced.
In the present embodiment, strand width is provided with two groups of guiding mechanisms, so that centering guiding is carried out to strand；With
When, it is provided with M-emss at crystallizer, be located in secondary cooling zone and be additionally provided with solidification end at casting blank solidification end
Magnetic stirrer, magnetic stirrer herein can not configure according to the steel grade type selecting that conticaster produces, be separately configured or entirely
Portion configures, to meet the demand producing straight carbon steel and variety steel, special steel.
Other embodiment
Using little roll neck close packed roller structure guide section can for one, two or more, the guide section in the present embodiment is equal
Using wide arc gap list roller supporting construction, now, in crystallizer Xia Kou position setting 2～8 to sufficient roller, to realize good of strand
Support guide effect, thus effective control Deformation of Slab Bulge.
Using solid matter (operating) water nozzle cooling section can for one, two or more, specifically can according to produce casting blank specification and
Steel grade carries out reasonable disposition, and the cooling section in the present embodiment all carries out strand cooling twice using aerial fog nozzle.
Guiding mechanism along the setting of strand width can be 0 group, 1 group, 2 groups or multigroup, and produces different in width strand
When, can with corresponding using manually, electrically, the mode adjusting position such as pneumatically or hydraulically.
Finally illustrate, preferred embodiment above only in order to technical scheme to be described and unrestricted, although logical
Cross above preferred embodiment the present invention to be described in detail, it is to be understood by those skilled in the art that can be
In form and various changes are made to it, without departing from claims of the present invention limited range in details.
Claims (10)
1. a kind of high speed small billet or little round billet continuous casting machine secondary cooling method are it is characterised in that comprise the following steps:
1) secondary cooling zone is divided into multiple guide sections successively along casting direction, several guide sections that front end is connected with crystallizer
Using solid matter roll structure, remaining each guide section is all using single roller supporting construction；
2) again secondary cooling zone is divided into multiple cooling sections successively along casting direction, several cooling sections of front end adopt (operating) water nozzle
Carry out slab cooling, remaining each cooling section all carries out slab cooling using aerial fog nozzle.
2. high speed small billet according to claim 1 or little round billet continuous casting machine secondary cooling method it is characterised in that: described
Step 2) in, (operating) water nozzle adopts high pressure nozzle or normal pressure nozzle；During using high pressure nozzle, operating pressure is controlled to 0.1～
2.0mpaa, when (operating) water nozzle adopts normal pressure nozzle, operating pressure is controlled to 0.1～0.7mpaa.
3. high speed small billet according to claim 1 or little round billet continuous casting machine secondary cooling method it is characterised in that: described
Step 1) in, when each guide section is all using single roller supporting construction, in the setting 2～8 of crystallizer Xia Kou position to sufficient roller.
4. high speed small billet according to claim 1 or little round billet continuous casting machine secondary cooling method it is characterised in that: by two
Secondary cooling is distinguished into 5～10 cooling sections, is followed successively by water cooling section, aerosol cooling section and air cooling section along casting direction.
5. the little side of high speed according to claim 1 or little round billet continuous casting machine secondary cooling method it is characterised in that: along strand
Width arranges several groups of guide means in secondary cooling zone, and controls air cooling section two side nozzle and jet face normal direction side
To angle.
6. a kind of high speed small billet being applied to as described in any one of claim 1-5 or little round billet continuous casting machine secondary cooling method
Device, including crystallizer and be arranged on secondary cooling zone below crystallizer it is characterised in that: described secondary cooling zone is along pouring
Build direction and be divided into multiple guide sections successively, the guide section positioned at front end has several to adopt solid matter roll structure and each solid matter roll structure
It is arranged in successively below crystallizer along casting direction, remaining each guide section is all using single roller supporting construction；Described secondary cooling zone
It is divided into multiple cooling sections successively along casting direction, each cooling section two sides are laid with (operating) water nozzle and aerial fog nozzle successively, or according to
Secondary it is laid with aerial fog nozzle.
7. high speed small billet according to claim 6 or little round billet continuous casting machine secondary cooling apparatus it is characterised in that: described
In secondary cooling zone, strand width is provided with several groups of guide means.
8. high speed small billet according to claim 6 or little round billet continuous casting machine secondary cooling apparatus it is characterised in that: described
Cooling section has 5～10 sections, is followed successively by water cooling section, aerosol cooling section and air cooling section along casting direction；Described air cooling
In section, the angle between the nozzle of both sides and jet face normal orientation is 0～80 °.
9. high speed small billet according to claim 6 or little round billet continuous casting machine secondary cooling apparatus it is characterised in that: described
It is provided with M-emss in crystallizer.
10. high speed small billet according to claim 6 or little round billet continuous casting machine secondary cooling apparatus it is characterised in that: institute
State in described secondary cooling zone and be provided with freezing end-point magnetic stirrer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611072852.7A CN106345977A (en) | 2016-11-29 | 2016-11-29 | Secondary cooling method and device of high-speed small square billet or small round billet continuous casting machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611072852.7A CN106345977A (en) | 2016-11-29 | 2016-11-29 | Secondary cooling method and device of high-speed small square billet or small round billet continuous casting machine |
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| CN106345977A true CN106345977A (en) | 2017-01-25 |
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| CN201611072852.7A Pending CN106345977A (en) | 2016-11-29 | 2016-11-29 | Secondary cooling method and device of high-speed small square billet or small round billet continuous casting machine |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107983926A (en) * | 2017-12-29 | 2018-05-04 | 南京钢铁股份有限公司 | A kind of billet caster di-cold spray nozzle and its method for arranging |
| CN109702163A (en) * | 2019-03-07 | 2019-05-03 | 山东钢铁股份有限公司 | It is a kind of for controlling the Spraying Water of Nozzles in Secondary Cooling device and method of casting blank off-square |
| CN110293212A (en) * | 2019-07-25 | 2019-10-01 | 中冶赛迪工程技术股份有限公司 | Continuous small-billet casting secondary coolingwater control method under the conditions of a kind of high pulling rate |
| CN110385410A (en) * | 2019-08-01 | 2019-10-29 | 中冶赛迪工程技术股份有限公司 | A kind of continuous casting installation for casting and its technique |
| CN110394436A (en) * | 2019-07-26 | 2019-11-01 | 南京钢铁股份有限公司 | A kind of secondary cooling zone spray equipment of billet caster |
| CN111212694A (en) * | 2017-10-12 | 2020-05-29 | 株式会社Posco | Casting method and casting equipment for casting blank |
| CN111992686A (en) * | 2020-09-03 | 2020-11-27 | 福建三钢闽光股份有限公司 | Aerial fog full-water combined cooling high-carbon steel continuous casting production method |
| CN113423520A (en) * | 2018-12-12 | 2021-09-21 | 达涅利机械设备股份公司 | Method for obtaining a continuous casting plant and continuous casting plant thus obtained |
| CN114226666A (en) * | 2021-12-20 | 2022-03-25 | 上海弘铭冶金技术工程有限公司 | Efficient temperature compensation cooling system for high-pulling-speed production of small square billets |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111212694A (en) * | 2017-10-12 | 2020-05-29 | 株式会社Posco | Casting method and casting equipment for casting blank |
| CN107983926A (en) * | 2017-12-29 | 2018-05-04 | 南京钢铁股份有限公司 | A kind of billet caster di-cold spray nozzle and its method for arranging |
| CN113423520A (en) * | 2018-12-12 | 2021-09-21 | 达涅利机械设备股份公司 | Method for obtaining a continuous casting plant and continuous casting plant thus obtained |
| CN109702163A (en) * | 2019-03-07 | 2019-05-03 | 山东钢铁股份有限公司 | It is a kind of for controlling the Spraying Water of Nozzles in Secondary Cooling device and method of casting blank off-square |
| CN109702163B (en) * | 2019-03-07 | 2024-04-09 | 山东钢铁股份有限公司 | Secondary cooling water distribution method for controlling casting blank square off |
| CN110293212A (en) * | 2019-07-25 | 2019-10-01 | 中冶赛迪工程技术股份有限公司 | Continuous small-billet casting secondary coolingwater control method under the conditions of a kind of high pulling rate |
| CN110394436A (en) * | 2019-07-26 | 2019-11-01 | 南京钢铁股份有限公司 | A kind of secondary cooling zone spray equipment of billet caster |
| CN110385410A (en) * | 2019-08-01 | 2019-10-29 | 中冶赛迪工程技术股份有限公司 | A kind of continuous casting installation for casting and its technique |
| CN111992686A (en) * | 2020-09-03 | 2020-11-27 | 福建三钢闽光股份有限公司 | Aerial fog full-water combined cooling high-carbon steel continuous casting production method |
| CN111992686B (en) * | 2020-09-03 | 2021-12-17 | 福建三钢闽光股份有限公司 | Aerial fog full-water combined cooling high-carbon steel continuous casting production method |
| CN114226666A (en) * | 2021-12-20 | 2022-03-25 | 上海弘铭冶金技术工程有限公司 | Efficient temperature compensation cooling system for high-pulling-speed production of small square billets |
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Application publication date: 20170125 |