CN104128575A - Method and device for obtaining continuous taper of upper datum parabola of crystallizer - Google Patents

Method and device for obtaining continuous taper of upper datum parabola of crystallizer Download PDF

Info

Publication number
CN104128575A
CN104128575A CN201410400711.8A CN201410400711A CN104128575A CN 104128575 A CN104128575 A CN 104128575A CN 201410400711 A CN201410400711 A CN 201410400711A CN 104128575 A CN104128575 A CN 104128575A
Authority
CN
China
Prior art keywords
crystallizer
tapering
length
reading
total
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201410400711.8A
Other languages
Chinese (zh)
Other versions
CN104128575B (en
Inventor
陈洪智
徐永斌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wisdri Engineering and Research Incorporation Ltd
Original Assignee
Wisdri Engineering and Research Incorporation Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wisdri Engineering and Research Incorporation Ltd filed Critical Wisdri Engineering and Research Incorporation Ltd
Priority to CN201410400711.8A priority Critical patent/CN104128575B/en
Publication of CN104128575A publication Critical patent/CN104128575A/en
Application granted granted Critical
Publication of CN104128575B publication Critical patent/CN104128575B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Continuous Casting (AREA)

Abstract

The invention belongs to the field of steel making continuous casting and provides a method and device for obtaining the continuous taper of an upper datum parabola of a crystallizer. The method comprises the steps that the taper at the position of an upper opening of the crystallizer is worked out; the total taper in the length direction of the crystallizer is worked out; according to the taper at the position of the upper opening of the crystallizer and the total taper, the taper at any position away from the upper opening in the length direction is worked out. According to the crystallizer manufactured by the adoption of the method and device for obtaining the continuous taper of the upper datum parabola of the crystallizer, an inner casting blank and the wall surface of the crystallizer are in good contact with each other at any position, high heat transfer efficiency between the casting blank and the crystallizer is achieved, in this way, the quality of a casting blank is improved, the casting speed is increased, and an important guarantee is provided for efficient continuous casting.

Description

The continuous tapering acquisition methods of benchmark parabola and device on a kind of crystallizer
Technical field
The invention belongs to steel-making continuous casting field, relate in particular to the continuous tapering acquisition methods of benchmark parabola and device on a kind of crystallizer.
Background technology
Crystallizer is the heart of conticaster, and formulate conical degree of crystallizer, is the core of crystallizer design process, and the reasonability of its formulation is directly determining the attainable pulling rate scope of conticaster and the slab quality of casting.If conical degree of crystallizer arranges too smallly, can make the easy air gap that produces between base shell and crystallizer wall, thereby affect the heat transfer between strand and crystallizer, the inhomogeneous growth that causes base shell in crystallizer, the air gap that the inhomogeneities of this shell growth process can be aggravated between base shell and crystallizer wall conversely produces, and then produces such as slab quality problems such as Longitudinal Surface Cracks; If conical degree of crystallizer arranges too much, can aggravate the wearing and tearing to copper plate of crystallizer, increase resistance of billet withdrawal simultaneously, and then produce such as slab quality problems such as surperficial transverse fissures; And all these are because tapering arranges, the unreasonable impact bringing all can produce restriction to casting speed.For this reason, reasonably formulate the realistic meaning that the tapering of crystallizer in casting process has highly significant.
Summary of the invention
In view of the above problems, the object of the present invention is to provide the continuous tapering acquisition methods of benchmark parabola and device on a kind of crystallizer, be intended to solve in prior art scheme due to tapering arrange improper, make base shell and the loose contact of crystallizer wall of strand in crystallizer good, affect the technical problem of slab quality.
On the one hand, on described crystallizer, the continuous tapering acquisition methods of benchmark parabola comprises the steps:
Calculate crystallizer position of upper tapering;
Calculate total tapering of length of mould direction;
According to described position of upper tapering and total tapering, calculate the tapering in length direction distance any position suitable for reading.
On the other hand, on described crystallizer, the continuous tapering acquisition device of benchmark parabola comprises:
Tapering computing unit suitable for reading, for calculating crystallizer position of upper tapering;
Total tapering computing unit, for calculating total tapering of length of mould direction;
Tapering distribution computing unit, uses according to described position of upper tapering and total tapering, calculates the tapering in length direction distance any position suitable for reading.
The invention has the beneficial effects as follows: the theoretical foundation that the present invention is based on the process of billet withdrawal of hot-cast base in crystallizer, total tapering of take in length of mould direction is starting point, obtain the continuous cast mold of the continuous tapering of benchmark parabola, in crystallizer, the base shell of strand and crystallizer wall what position in office all keeps good contact, realized heat transfer efficiency high between strand and crystallizer, thereby improved slab quality, promoted casting speed, for realizing high efficiency continuous casting, provide important guarantee.
Accompanying drawing explanation
Fig. 1 is the flow chart of the continuous tapering acquisition methods of benchmark parabola on the crystallizer that provides of the embodiment of the present invention;
Fig. 2 is the crystallizer vertical profile structure chart that the embodiment of the present invention provides;
Fig. 3 is apart from crystallizer position of upper and crystallizer internal cavity size length of side S in example one xcurve relation figure;
Fig. 4 is apart from crystallizer position of upper and crystallizer internal cavity size length of side S in example two xcurve relation figure;
Fig. 5 is the block diagram of the continuous tapering acquisition device of benchmark parabola on the crystallizer that provides of the invention process.
The specific embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
For technical solutions according to the invention are described, below by specific embodiment, describe.
Fig. 1 shows the continuous tapering acquisition methods of benchmark parabola flow process on the crystallizer that the embodiment of the present invention provides, and only shows for convenience of explanation the part relevant to the embodiment of the present invention.
On the crystallizer that the present embodiment provides, the continuous tapering acquisition methods of benchmark parabola comprises the steps:
Step S101, calculating crystallizer position of upper tapering;
Total tapering of step S102, calculating length of mould direction.
With reference to the crystallizer vertical profile structure shown in Fig. 2, and set up XYZ coordinate system according to diagram, the selection of the origin of coordinates should make the T trying to achieve 1meet the solidification shrinkage characteristic of current cast steel grade in crystallizer with the value of T.According to casting blank solidification, meet square root law, and crystallizer change in size and strand contraction phase work as, and the expression formula that can obtain crystallizer position of upper tapering and total tapering according to the definition of conical degree of crystallizer is respectively as shown in formula (1) and formula (2):
T 1 = k a x 1 × 10 5 - - - ( 1 )
T = 2 k ( x 2 - x 1 ) aL × 10 5 - - - ( 2 )
Wherein k is steel grade coefficient, conventionally gets 0～20mm 1/2, a is the crystallizer length of side suitable for reading, x 1for crystallizer coordinate suitable for reading, x 2for crystallizer end opening coordinate, L is crystallizer total length.
Step S103, according to described position of upper tapering and total tapering, calculate the tapering in length direction distance any position suitable for reading.
By formula (1), can be obtained:
k = T 1 a x 1 × 10 - 5 - - - ( 3 )
In addition, there is geometrical relationship:
L＝x 2-x 1 (4)
In conjunction with formula (2), formula (3) and formula (4), can obtain:
TL = 2 T 1 x 1 ( x 2 - x 1 ) = T ( x 2 + x 1 ) ( x 2 - x 1 ) - - - ( 5 )
Can obtain thus:
2 T 1 x 1 = T ( x 2 + x 1 )
Further known:
x 1 x 2 = ( T 2 T 1 - T ) 2 - - - ( 6 )
Simultaneous formula (4) and formula (6), can obtain:
x 1 = T 2 L 4 T 1 ( T 1 - T ) , x 2 ( 2 T 1 - T ) 2 L 4 T 1 ( T 1 - T ) - - - ( 7 )
Substitution formula (3), can obtain:
k = T 1 Ta L 2 T 1 ( T 1 - T ) × 10 - 5 - - - ( 8 )
According to the definition of conical degree of crystallizer, in conjunction with formula (7) and formula (8), the tapering Tx that can obtain any position in crystallizer is:
T x = 2 k ( x 1 + x + Δx - x 1 + x ) a ( x 1 + x + Δx - x 1 - x ) × 10 5 = 2 k a ( x 1 + x + Δx - x 1 + x Δx ) × 10 5 = 2 k a ( x 1 + x ) / × 10 5 = T 1 T L 2 T 1 ( T 1 - T ) 1 x 1 + x = T 1 T L 2 T 1 ( T 1 - T ) 1 T 2 L 4 T 1 ( T 1 - T ) + x - - - ( 9 )
Finally according to the continuous tapering of length of mould direction, distribute, make corresponding crystallizer.When using this crystallizer to carry out steel-making continuous casting, in crystallizer, the base shell of strand and crystallizer wall what position in office all keeps good contact, realized heat transfer efficiency high between strand and crystallizer, thereby improved slab quality, promote casting speed, for realizing high efficiency continuous casting, provide important guarantee.
Be further used as preferably, this implementation method also comprises the steps:
Step S104, according to described position of upper tapering and total tapering, calculate the crystallizer internal cavity length of side in length direction distance any position suitable for reading.
In step S103, according to the position of upper tapering obtaining and total tapering, calculate the tapering distribution of crystallizer in the longitudinal direction, can distribute and determine the structure of crystallizer by tapering.Can certainly distribute by the inner chamber length of side of crystallizer and determine the structure of crystallizer.In this preferred steps, by position of upper tapering and total tapering, calculate the crystallizer internal cavity length of side and distribute.
According to formula (7) and (8), can calculate apart from crystallizer distance suitable for reading is the inner chamber length of side S at x place xas follows:
S x = a - 2 k ( x 1 + x - x 1 ) = a ( 1 - T 1 T L T 1 ( T 1 - T ) ( T 2 L 4 T 1 ( T 1 - T ) + x - T 2 L 4 T 1 ( T 1 - T ) ) × 10 - 5 ) - - - ( 10 )
Provide two concrete calculated examples below.
Example one:
Casting high-carbon steel, the square billet that casting blank specification is 200mm * 200mm, length of mould is 900mm, the crystallizer 203.27mm that is of a size of suitable for reading, crystallizer position of upper is 37.5mm.
As the above analysis, L=900mm, a=203.27mm, x 1=37.5mm, x 2=937.5mm; Correspondingly get k=0.0385mm 1/2.
1.1 calculate crystallizer position of upper tapering T 1:
T 1 = k a x 1 × 10 5 = 3.09 % / m ;
1.2 calculate the total tapering T in length of mould direction:
T = 2 k ( x 2 - x 1 ) aL × 10 5 = 1.03 % / m ;
1.3 calculate the crystallizer internal cavity length of side S apart from any position x suitable for reading x:
S x = 203.7411 - 0.07693 37.5 + x mm ;
1.4 calculate apart from the tapering T of any position of any position x suitable for reading x:
T x = 18.9223 37.5 + x % / m ;
Apart from crystallizer position of upper x and crystallizer internal cavity size length of side S xcurved line relation as shown in Figure 3.
Example two:
Cast alloys steel, the square billet that casting blank specification is 600mm * 600mm, length of mould is 900mm, the crystallizer 610.73mm that is of a size of suitable for reading, crystallizer position of upper is 37.5mm.
As the above analysis, L=900mm, a=610.73mm, x 1=37.5mm, x 2=937.5mm; Correspondingly get k=0.1346mm 1/2.
2.1 calculate crystallizer position of upper tapering T 1:
T 1 = k a x 1 × 10 5 = 3.6 % / m ;
2.2 calculate the total tapering T in length of mould direction:
T = 2 k ( x 2 - x 1 ) aL × 10 5 = 1.2 % / m ;
2.3 calculate the crystallizer internal cavity length of side S apart from any position x suitable for reading x:
S x = 612.3790 - 0.2693 37.5 + x mm ;
2.4 calculate the tapering T apart from any position x suitable for reading x:
T x = 22.0454 37.5 + x % / m .
Apart from crystallizer position of upper x and crystallizer internal cavity size length of side S xcurved line relation as shown in Figure 4.
In addition, as shown in Figure 3, the embodiment of the present invention also provides the continuous tapering acquisition device of benchmark parabola on a kind of crystallizer, comprising:
Tapering computing unit 31 suitable for reading, for calculating crystallizer position of upper tapering;
Total tapering computing unit 32, for calculating total tapering of length of mould direction;
Tapering distribution computing unit 33, uses according to described position of upper tapering and total tapering, calculates the tapering in length direction distance any position suitable for reading.
Preferably, described device also comprises:
Inner chamber length of side computing unit 34, for according to described position of upper tapering and total tapering, calculates the crystallizer internal cavity length of side in length direction distance any position suitable for reading.
Wherein, described crystallizer position of upper tapering wherein k is steel grade coefficient, and a is the crystallizer length of side suitable for reading, x 1for crystallizer coordinate suitable for reading.
Total tapering of described length of mould direction x wherein 2for crystallizer end opening coordinate, L is crystallizer total length.
The tapering of described distance any position suitable for reading wherein x is from distance length suitable for reading at length direction; The crystallizer internal cavity length of side of described distance any position suitable for reading S x = a ( 1 - T 1 T L T 1 ( T 1 - T ) ( T 2 L 4 T 1 ( T 1 - T ) + x - T 2 L 4 T 1 ( T 1 - T ) ) × 10 - 5 ) .
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.

Claims (8)

1. the continuous tapering acquisition methods of benchmark parabola on crystallizer, is characterized in that, described method comprises:
Calculate crystallizer position of upper tapering;
Calculate total tapering of length of mould direction;
According to described position of upper tapering and total tapering, calculate the tapering in length direction distance any position suitable for reading.
2. method as claimed in claim 1, is characterized in that, described method also comprises:
According to described position of upper tapering and total tapering, calculate the crystallizer internal cavity length of side in length direction distance any position suitable for reading.
3. method as claimed in claim 2, is characterized in that described crystallizer position of upper tapering wherein k is steel grade coefficient, and a is the crystallizer length of side suitable for reading, x 1for crystallizer coordinate suitable for reading.
4. method as claimed in claim 3, is characterized in that total tapering of described length of mould direction x wherein 2for crystallizer end opening coordinate, L is crystallizer total length.
5. method as claimed in claim 4, is characterized in that the crystallizer internal cavity length of side of described distance any position suitable for reading S x = a ( 1 - T 1 T L T 1 ( T 1 - T ) ( T 2 L 4 T 1 ( T 1 - T ) + x - T 2 L 4 T 1 ( T 1 - T ) ) × 10 - 5 ) , Wherein x is from distance length suitable for reading at length direction.
6. method as claimed in claim 4, is characterized in that the tapering of described distance any position suitable for reading wherein x is from distance length suitable for reading at length direction.
7. the continuous tapering acquisition device of benchmark parabola on crystallizer, is characterized in that, described device comprises:
Tapering computing unit suitable for reading, for calculating crystallizer position of upper tapering;
Total tapering computing unit, for calculating total tapering of length of mould direction;
Tapering distribution computing unit, for according to described position of upper tapering and total tapering, calculates the tapering in length direction distance any position suitable for reading.
8. install as claimed in claim 7, it is characterized in that, described device also comprises:
Inner chamber length of side computing unit, for according to described position of upper tapering and total tapering, calculates the crystallizer internal cavity length of side in length direction distance any position suitable for reading.
CN201410400711.8A 2014-08-14 2014-08-14 The continuous tapering acquisition methods of benchmark parabola and device on a kind of crystallizer Active CN104128575B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410400711.8A CN104128575B (en) 2014-08-14 2014-08-14 The continuous tapering acquisition methods of benchmark parabola and device on a kind of crystallizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410400711.8A CN104128575B (en) 2014-08-14 2014-08-14 The continuous tapering acquisition methods of benchmark parabola and device on a kind of crystallizer

Publications (2)

Publication Number Publication Date
CN104128575A true CN104128575A (en) 2014-11-05
CN104128575B CN104128575B (en) 2016-04-20

Family

ID=51801570

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410400711.8A Active CN104128575B (en) 2014-08-14 2014-08-14 The continuous tapering acquisition methods of benchmark parabola and device on a kind of crystallizer

Country Status (1)

Country Link
CN (1) CN104128575B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105499528B (en) * 2015-10-23 2018-06-26 首钢集团有限公司 A kind of high-carbon steel slab continuous cast method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2172856Y (en) * 1993-10-05 1994-07-27 冶金工业部自动化研究院 Instrument for measuring openings and back tapers of crystallizers
CN2183234Y (en) * 1994-05-12 1994-11-23 冶金工业部自动化研究院 Conicity-measuring device for crystallizer of continuous casting machine
US20010017199A1 (en) * 1998-05-26 2001-08-30 Rama Bommaraju Continuous casting mold and processes for making and retrofitting
CN101398300A (en) * 2007-09-28 2009-04-01 上海重矿连铸技术工程有限公司 Conicity measurement mechanism for circular copper pipe crystallizer
CN103433442A (en) * 2013-08-29 2013-12-11 重庆大学 Method for determining continuous casting crystallizer inner cavity taper

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2172856Y (en) * 1993-10-05 1994-07-27 冶金工业部自动化研究院 Instrument for measuring openings and back tapers of crystallizers
CN2183234Y (en) * 1994-05-12 1994-11-23 冶金工业部自动化研究院 Conicity-measuring device for crystallizer of continuous casting machine
US20010017199A1 (en) * 1998-05-26 2001-08-30 Rama Bommaraju Continuous casting mold and processes for making and retrofitting
CN101398300A (en) * 2007-09-28 2009-04-01 上海重矿连铸技术工程有限公司 Conicity measurement mechanism for circular copper pipe crystallizer
CN103433442A (en) * 2013-08-29 2013-12-11 重庆大学 Method for determining continuous casting crystallizer inner cavity taper

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105499528B (en) * 2015-10-23 2018-06-26 首钢集团有限公司 A kind of high-carbon steel slab continuous cast method

Also Published As

Publication number Publication date
CN104128575B (en) 2016-04-20

Similar Documents

Publication Publication Date Title
CN105618675B (en) The casting method of sand cooling iron is covered with the shape
CN102319891A (en) Gating system capable of effectively controlling air entrainment and slag entrainment and design method thereof
CN104070513A (en) Method for precision lineation of thin-wall special-shaped cast cabin
CN203887184U (en) Ingot mold for round casting blank with large height-diameter ratio
CN102240783A (en) Online adjusting method for extensively reducing width of continuous casting mold
CN104128575B (en) The continuous tapering acquisition methods of benchmark parabola and device on a kind of crystallizer
CN102228970A (en) System for simulating molten steel solidification heat-transfer process inside continuous casting crystallizer
CN104128576B (en) The continuous tapering acquisition methods of benchmark parabola and device under a kind of crystallizer
CN203184610U (en) Steel ingot mold for large-scale and extremely thick slab
CN205834144U (en) Continuous casting pulling-straightening roller and include the withdrawal straightening machine of this pulling-straightening roller
CN102228972B (en) Calculation method for solidification heat transfer process of continuous casting crystallizer
CN207154664U (en) A kind of sand mold casting mold for mechanical arm production
CN104117641B (en) A kind of crystallizer segmentation continuous tapering acquisition methods of benchmark parabola and device
CN102078947A (en) Method for calculating heat flow density in solidification heat transfer process of continuous casting crystallizer
CN206241192U (en) Running and feeding system on the DISA lines of small-sized cylinder body gray iron casting
CN102228974B (en) Method for simulating molten steel solidification heat-transfer process inside continuous casting crystallizer
CN205020772U (en) External recessing round steel ingot mould
CN114626224A (en) Method for determining inner cavity taper of ultrahigh-pulling-speed square billet continuous casting crystallizer
CN105149521B (en) Steelframe casting and its production technology in a kind of subway
CN202591584U (en) Die capable of improving mechanical property of aluminium wheel rim
CN203944833U (en) A kind of high pulling rate Submersed nozzle of sheet billet
CN115401178A (en) Screw-down process determination method for improving internal quality of gear steel
CN205816754U (en) A kind of composite die preventing alloy pig from producing casting shrinking hole
CN201380270Y (en) Large-scale roller casting device
CN105921705A (en) Composite die preventing alloy ingot from producing casting shrinkage cavities

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant