CN206763871U

CN206763871U - A kind of steel-making continuous casting is with uniformly cooling down high pulling rate crystallizer

Info

Publication number: CN206763871U
Application number: CN201720682113.3U
Authority: CN
Inventors: 张家泉; 邱东升; 兰鹏; 李亮; 李少翔
Original assignee: University of Science and Technology Beijing USTB
Current assignee: University of Science and Technology Beijing USTB
Priority date: 2017-06-13
Filing date: 2017-06-13
Publication date: 2017-12-19
Anticipated expiration: 2027-06-13

Abstract

The utility model provides a kind of steel-making continuous casting with high pulling rate crystallizer is uniformly cooled down, and belongs to steelmaking technical field.The crystallizer is square or rectangle copper pipe, and 4 folding corner regions of 1/4~1/3 section of crystallizer bottom are all or part of open gap structure.Strand part is by copper coin support or all exposed in the range of 10~35mm of crystallizer corner.Crystallizer copper pipe inner cavity taper uses continuous taper curve, more taper curves or single taper curve.The circular arc that crystallizer copper corner of tube is right angle or radius is 3~30mm.The utility model is by the way that common square billet or the corner of rectangular-blank crystallizer copper pipe bottom four are cut off, appropriate enhancing strand is deviateing the heat convection of angular zone, make deviation corner shell thickness consistent with corner and edge, eliminate in corner and deviate the stress concentration of angular zone, solve the current crystallizer copper pipe same section cooling velocity inconsistence problems of strand in use, the defects of strand corner can effectively be avoided and deviate angular zone appearance depression and crackle, improve slab quality.

Description

A kind of steel-making continuous casting is with uniformly cooling down high pulling rate crystallizer

Technical field

Steelmaking technical field is the utility model is related to, a kind of steel-making continuous casting is particularly related to and is crystallized with high pulling rate is uniformly cooled down Device.

Background technology

For common tubular square billet crystallizer copper pipe in casting process, corner Two-Dimensional Heat and the cooling of edge one side cause strand Surface temperature is different, and strand corner amount of contraction is more than edge so that deviates corner positions and produces certain thickness air gap.Deviate angular region The characteristics of domain one dimensional heat transfer, cooling velocity are less than corner and edge, and final shell thickness is less than corner and border region.Green shell is thick Degree inequality causes corner and deviation angular zone easily to produce stress concentration and the mass defects such as crackle or depression occur, and causes strand Scrapped in batch or cause bleed-out accident to occur.There are requirements at the higher level to shell thickness uniformity under the conditions of high pulling rate, to crystallizer Lower corners and deviation angular zone strand carry out different degrees of cooling treatment, the defects of can effectively reducing strand crackle or be recessed Occurence tendency, while improve strand and resist ferrostatic pressure in crystallizer outlet hypomere and cause the ability of deformation.

Utility model content

The utility model provides a kind of steel-making continuous casting with high pulling rate crystallizer is uniformly cooled down, and can solve the problem that square billet or rectangular bloom Crystallizer copper pipe the problems such as crystallizer exit shell thickness is uneven in use.

The crystallizer is square or rectangle copper pipe structure, and 4 folding corner regions of 1/4~1/3 section of crystallizer bottom is all Or fractional open breach, crystallizer corner notches one side 10~35mm of the length of side.

Wherein, crystallizer copper pipe inner cavity taper uses continuous taper curve, more taper curves or single taper curve.

The circular arc that crystallizer copper corner of tube is right angle or radius is 3~30mm.

Crystallizer barbed portion is carried out water spray to exposed strand using water-cooling nozzle and forces cooling, deflecting angle and corner spray Water intensity is adjustable.

Above-mentioned technical proposal of the present utility model has the beneficial effect that：

In such scheme, by the way that common square billet or the corner of rectangular-blank crystallizer copper pipe bottom four are cut off, appropriate enhancing Strand deviate angular zone heat convection so that deviate corner shell thickness it is consistent with corner and edge, eliminate corner with Deviate the stress concentration of angular zone, solve the common square billet or rectangular-blank crystallizer copper pipe same section of strand in use Cooling velocity inconsistence problems, there is the defects of depression and crackle so as to effectively avoid strand corner and deviate angular zone, Improve slab quality.

Brief description of the drawings

Fig. 1 is steel-making continuous casting of the present utility model with uniformly cooling down high pulling rate mold structure schematic diagram；

Fig. 2 is Fig. 1 A-A faces cross sectional plan view；

Fig. 3 is that the utility model crystallizer lower corners breach is longitudinal screen gap structure form；

Fig. 4 is that the utility model crystallizer lower corners breach is round pass structure type；

Fig. 5 is that the utility model crystallizer lower corners breach is horizontal rectangular configuration form.

Wherein：The 1- casting mouth of a river；2- liquid levels；3- crystallizers；4- corner notches force water-spraying control；5- strands；6- is crystallized Device breach；The 7- crystallizer corner notches one side length of side；8- water-cooling nozzles；9- crystallizer copper plate supporting devices；10- crystallizer coppers Plate.

Embodiment

To make the technical problems to be solved in the utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing And specific embodiment is described in detail.

The utility model provides a kind of steel-making continuous casting with uniformly cooling down high pulling rate crystallizer.

As depicted in figs. 1 and 2, the crystallizer is square or rectangle copper pipe structure, and top is the casting mouth of a river 1, the bronze medal of crystallizer 3 Intraluminal fluid face 2 opens breach less than edge on copper pipe, 4 folding corner regions of 1/4~1/3 section of crystallizer bottom to be all or part of, As crystallizer breach 6, the crystallizer corner notches one side length of side 7 are 10~35mm.

Crystallizer copper pipe inner cavity taper uses continuous taper curve, more taper curves or single taper curve.

Crystallizer barbed portion carries out corner notches to exposed strand 5 using water-cooling nozzle 8 and forces water-spraying control 4.

The edge center copper plate of crystallizer 10 of crystallizer copper pipe down gap section is carried out using crystallizer copper plate supporting device 9 Fixed support.

As shown in Fig. 3, Fig. 4 and Fig. 5, crystallizer copper pipe bottom uses gap structure, and barbed portion can be vertical bar shape Screen gap, round pass and horizontal rectangular indentation etc., openings of sizes can be depending on the cooling of different steel grades requirement everywhere.

The part of crystallizer breach 6 carries out water spray to exposed strand 5 using water-cooling nozzle 8 and forces cooling, corner and deviation The nozzle spray intensity of angle part three is adjustable, deviates angular zone heat derives by weakening corner heat transfer and enhancing, it is therefore an objective to make Exposed strand corner and deviation angle part are consistent with strand edge shell thickness.Temperature of the strand 5 on same section uniform one Cause, eliminate thermal stress, reduce strand and defect probability occurs, improve strand epidermis and subcutaneous quality.

Described above is preferred embodiment of the present utility model, it is noted that for the ordinary skill of the art For personnel, on the premise of principle described in the utility model is not departed from, some improvements and modifications can also be made, these improvement The scope of protection of the utility model is also should be regarded as with retouching.

Claims

1. a kind of steel-making continuous casting is with uniformly cooling down high pulling rate crystallizer, it is characterised in that：For square or rectangle copper pipe structure, crystallization 4 folding corner regions of 1/4~1/3 section of device bottom are completely or partially to open breach, the crystallizer corner notches one side length of side 10~ 35mm。

2. steel-making continuous casting according to claim 1 is with uniformly cooling down high pulling rate crystallizer, it is characterised in that：The crystallizer Copper pipe inner cavity taper uses continuous taper curve.

3. steel-making continuous casting according to claim 1 is with uniformly cooling down high pulling rate crystallizer, it is characterised in that：The crystallizer Copper pipe inner cavity taper uses more taper curves.

4. steel-making continuous casting according to claim 1 is with uniformly cooling down high pulling rate crystallizer, it is characterised in that：The crystallizer Copper pipe inner cavity taper uses single taper curve.

5. steel-making continuous casting according to claim 1 is with uniformly cooling down high pulling rate crystallizer, it is characterised in that：The crystallizer The circular arc that copper pipe corner is right angle or radius is 3~30mm.

6. steel-making continuous casting according to claim 1 is with uniformly cooling down high pulling rate crystallizer, it is characterised in that：The crystallizer Barbed portion carries out water spray to exposed strand using water-cooling nozzle and forces cooling, and cooling nozzles water outlet intensity can be adjusted.