CN205324668U - Can improve conventional slab continuous casting crystallizer of meniscus heat transfer homogeneity - Google Patents
Can improve conventional slab continuous casting crystallizer of meniscus heat transfer homogeneity Download PDFInfo
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- CN205324668U CN205324668U CN201620057985.6U CN201620057985U CN205324668U CN 205324668 U CN205324668 U CN 205324668U CN 201620057985 U CN201620057985 U CN 201620057985U CN 205324668 U CN205324668 U CN 205324668U
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- crystallizer
- meniscus
- cooling
- heat transfer
- meniscus position
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Abstract
The utility model provides a can improve conventional slab continuous casting crystallizer of meniscus heat transfer homogeneity, belongs to continuous casting equipment technical field for improve slab continuous casting crystallizer's meniscus heat transfer homogeneity. Its technical scheme is: the utility model discloses reduced the degree of depth of crystallizer copper meniscus position basin, increased meniscus position basin width simultaneously, guaranteed that the cooling rivers are smooth and easy, can make the intensity of cooling weaken and improve its cooling homogeneity, be favorable to first unburned bricks shell thickness even, reached and reduce surperficial longitudinal dehiscence purpose. The utility model discloses simple structure, the heat transfer homogeneity at this position is improved to the copper heat -transfer intensity that can slow down the meniscus position, keeps the raw water tank structure at non - meniscus position simultaneously, because the cooling water yield is unchangeable, has consequently guaranteed the whole intensity of cooling of crystallizer, realizes the basic function of crystallizer, has guaranteed the production safety direct motion.
Description
Technical field
This utility model relates to a kind of conventional plate blank continuous cast mold, belongs to continuous casting equipment technical field。
Background technology
Continuous casting billet Longitudinal Surface Cracks is a kind of surface quality defect that continuous casting billet is common, it frequently appears in the hypo-peritectic steel that carbon content is 0.10 ~ 0.18%, this undergoes phase transition in cooling procedure in crystallizer mainly due to this steel series, and body amount of contraction is big, it is easy to the inhomogeneous cooling causing initial solidification shell is even。Longitudinal Surface Cracks brings great puzzlement to production, if not clearing up face crack, the as easy as rolling off a log product causing next procedure is defective, and removing surface work brings the rising of production cost。
The surface longitudinal crack of strand results from the crystallization process of crystallizer, owing to heat flux distribution is uneven, cause shell thickness uneven, produce stress in the place that green shell is thin to concentrate, frictional force between crystallizer wall and base surface makes green shell bear bigger load, longitudinal stress is produced when drawing green shell and moving downward, this stress linearly increases with from crystallizer leptoprosopy to the distance of wide face centrage, maximum is in the centre of slab, and ferrostatic pressure linearly increases along with green shell moves down, static pressure makes green shell toward external drum, and face crack is expanded further。
By reducing crystallizer intensity of cooling, optimize mould reverse taper, improving the technological measures such as covering slag physical and chemical indexes and reduce slab surface crack rate in actual production。Practice have shown that, although reducing crystallizer intensity of cooling to showing that lobe is favourable, but the main purpose of crystallizer being for flash heat transfer, makes molten steel form certain thickness green shell, and reduction intensity of cooling simply can be runed counter to crystallizer function, result even in bleed-out accident。
In sum, surface quality of continuously cast slab, especially the formation of face crack is closely bound up with crystallizer cooling procedure, and its cooling reasonability and uniformity are significant to the surface quality of continuous casting billet。
Utility model content
Technical problem to be solved in the utility model is to provide a kind of conventional plate blank continuous cast mold improving meniscus heat transfer uniformity, this crystallizer can reduce the intensity of cooling at meniscus position, simultaneously without influence on the function of crystallizer entirety flash heat transfer, suitable in the steel grade that crack sensitivity is strong, it is particularly conducive to improve the surface quality of continuously cast slab of hypo-peritectic steel。
The technical scheme solving above-mentioned technical problem is:
A kind of conventional plate blank continuous cast mold improving meniscus heat transfer uniformity, optimize the structure of copper plate of crystallizer meniscus position tank, its improvements are, the width of meniscus position tank is 6mm ~ 8mm, the degree of depth is 9mm ~ 13mm, the width of changeover portion tank is 5mm ~ 8mm, and the degree of depth is 8mm ~ 18mm。
The above-mentioned conventional plate blank continuous cast mold improving meniscus heat transfer uniformity, the meniscus position on described copper plate of crystallizer tank top is the crystallizer copper plate of crystallizer flume section interval to 130 ~ 150mm below suitable for reading。
The beneficial effects of the utility model are:
This utility model reduces the degree of depth of copper plate of crystallizer meniscus position tank, increase meniscus position water well width, it is ensured that cooling smooth in water flow simultaneously, intensity of cooling can be made to weaken and improve its cooling uniformity, be conducive to initial solidification shell thickness uniform, reach to reduce the purpose of Longitudinal Surface Cracks。This utility model simple in construction, the copper coin heat-transfer intensity at meniscus position can be slowed down, improve the heat transfer uniformity at this position, retain the former sink structure at non-meniscus position simultaneously, owing to cooling water inflow is constant, thereby ensure that the overall intensity of cooling of crystallizer, it is achieved the basic function of crystallizer, it is ensured that production safety direct motion。
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the A-A sectional view of Fig. 1。
In figure, labelling is as follows: meniscus position tank 1, meniscus position 2, non-meniscus position tank 3, non-meniscus position 4, bolt 5。
Detailed description of the invention
Showing in figure, the top tank of copper plate of crystallizer is meniscus position tank 1, and bottom is non-meniscus position tank 3, and meniscus position tank 1 and non-meniscus position tank 3 are communicated as one。
Showing in figure, copper plate of crystallizer meniscus position 2 is the crystallizer copper plate of crystallizer part interval to 130 ~ 150mm below suitable for reading。
Showing in figure, this utility model reduces the degree of depth of copper plate of crystallizer meniscus position tank 1, increases meniscus position tank 1 width simultaneously, the width of meniscus position tank 1 is 6mm ~ 8mm, the degree of depth is 9mm ~ 13mm, and the width of changeover portion tank is 5mm ~ 8mm, and the degree of depth is 8mm ~ 18mm。
After improvement, it is possible to slow down the copper coin heat-transfer intensity at meniscus position 2, improve the heat transfer uniformity at this position, ensure that cooling smooth in water flow, intensity of cooling can be made to weaken and improve its cooling uniformity, be conducive to initial solidification shell thickness uniform, reach to reduce the purpose of Longitudinal Surface Cracks。
Non-meniscus position tank 3 structure at non-meniscus position 4 is retained while improving, owing to cooling water inflow is constant, thereby ensure that the overall intensity of cooling of crystallizer, it is achieved the basic function of crystallizer。
Claims (2)
1. the conventional plate blank continuous cast mold that can improve meniscus heat transfer uniformity, its crystallizer lower section suitable for reading is multiple copper plate of crystallizer tanks arranged in parallel, the top of each copper plate of crystallizer tank is meniscus position tank (1), bottom is non-meniscus position tank (3), it is characterized in that: the width at meniscus position tank (1) is 6mm ~ 8mm, the degree of depth is 9mm ~ 13mm, and the width of changeover portion tank is 5mm ~ 8mm, and the degree of depth is 8mm ~ 18mm。
2. the conventional plate blank continuous cast mold improving meniscus heat transfer uniformity according to claim 1, it is characterised in that: the meniscus position (2) on described copper plate of crystallizer tank top is suitable for reading to its lower copper plate of crystallizer flume section interval for 130 ~ 150mm for crystallizer。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620057985.6U CN205324668U (en) | 2016-01-21 | 2016-01-21 | Can improve conventional slab continuous casting crystallizer of meniscus heat transfer homogeneity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620057985.6U CN205324668U (en) | 2016-01-21 | 2016-01-21 | Can improve conventional slab continuous casting crystallizer of meniscus heat transfer homogeneity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205324668U true CN205324668U (en) | 2016-06-22 |
Family
ID=56197897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620057985.6U Expired - Fee Related CN205324668U (en) | 2016-01-21 | 2016-01-21 | Can improve conventional slab continuous casting crystallizer of meniscus heat transfer homogeneity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205324668U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108393445A (en) * | 2017-02-05 | 2018-08-14 | 鞍钢股份有限公司 | A kind of peritectic steel mold copper plate in slab continuous casting and water-cooling method |
-
2016
- 2016-01-21 CN CN201620057985.6U patent/CN205324668U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108393445A (en) * | 2017-02-05 | 2018-08-14 | 鞍钢股份有限公司 | A kind of peritectic steel mold copper plate in slab continuous casting and water-cooling method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160622 Termination date: 20220121 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |