CN103743539A - Method for measuring flow field direction and intensity in crystallizer and flow field intensity indicator - Google Patents
Method for measuring flow field direction and intensity in crystallizer and flow field intensity indicator Download PDFInfo
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- CN103743539A CN103743539A CN201310714686.6A CN201310714686A CN103743539A CN 103743539 A CN103743539 A CN 103743539A CN 201310714686 A CN201310714686 A CN 201310714686A CN 103743539 A CN103743539 A CN 103743539A
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- crystallizer
- flow field
- flow
- intensity
- measurement plate
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 28
- 239000010959 steel Substances 0.000 claims abstract description 28
- 238000005266 casting Methods 0.000 claims abstract description 7
- 238000005259 measurement Methods 0.000 claims description 28
- 210000000689 upper leg Anatomy 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 10
- 239000002893 slag Substances 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 4
- 238000007667 floating Methods 0.000 claims description 3
- 238000004451 qualitative analysis Methods 0.000 claims description 3
- 238000010008 shearing Methods 0.000 claims description 3
- 238000004169 molecular integral Methods 0.000 claims description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052786 argon Inorganic materials 0.000 abstract description 3
- 238000009749 continuous casting Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000007664 blowing Methods 0.000 abstract description 2
- 238000003780 insertion Methods 0.000 abstract description 2
- 230000037431 insertion Effects 0.000 abstract description 2
- 238000007654 immersion Methods 0.000 abstract 1
- 239000002436 steel type Substances 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000005499 meniscus Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The invention relates to the field of slab continuous casting, in particular to a method for measuring the direction and the strength of a flow field in a crystallizer and a flow field strength indicator. The flow field strength indicator is characterized by comprising a hanging frame, a horizontal foot seat, a hook and a flow measuring plate, wherein the flow measuring plate is of an integrated structure consisting of a pointer, a hanging ring, a connecting rod and a floater. Compared with the prior art, the invention has the beneficial effects that: an operator can detect the conditions of different steel types, different pulling speeds, different immersion nozzle insertion depths, argon blowing flow and the like, so that the change rule of the flow field in the crystallizer under different conditions is obtained, the flowing mode of molten steel in the crystallizer can be adjusted, controlled and optimized, and the internal and external quality of a casting blank is improved.
Description
Technical field
The present invention relates to the sheet billet continuous casting field in smelting iron and steel technology, relate in particular to a kind of method and flow field intensity indicator of measuring crystallizer flow field direction and intensity.
Background technology
Continuous casting is in steel pouring process, and the molten steel flow field in crystallizer spues the outflow of hole from submersed nozzle, impacts the narrow side copper plate of crystallizer, is then divided into upper reaches thigh with to dirty strand, and in the good base of strand product quality and crystallizer, the method for operation of stream thigh is closely related.For crystallizer flow field monitoring, have the equipment such as mold expert system at present, but it only monitors the variations such as temperature in crystallizer and friction force, the variation of stream field form and flow field intensity there is no effective watch-dog and means.
Be subject to the impact of Casting speed in casting cycle, argon gas amount and nozzle blocking; may there is double fluid thigh, bias current thigh or single current thigh in crystallizer flow field; extremely not only the casting machine that easily causes in flow field produces the accidents such as bleed-out in steel pouring process, also directly affects the floating eliminating of inclusion content in melting steel and the lubricant effect of crystallizer protecting residue.Crystallizer flow field changes and directly causes molten steel flow speed on molten steel in mold liquid level place and crystallizer protecting residue interface to change in addition; at molten steel and covering slag interface molten steel flow speed, cross senior general and crystallizer protecting residue generation shear action; crystallizer protecting residue is involved in molten steel, increases the probability that in strand, covering slag snotter forms.Crystallizer flow field has following characteristics:
(1) stream burst form is different in crystallizer, on crystallizer liquid steel level MOLTEN STEEL FLOW aspect different;
(2) a stream burst intensity difference causes molten steel flow speed difference on crystallizer liquid steel level.
The form of crystallizer flow field, the intensity in flow field are larger on the inside of strand and surface quality impact, and there is no at present effective monitoring means for the variation of crystallizer flow field.
Summary of the invention
The object of this invention is to provide a kind of method and flow field intensity indicator of measuring crystallizer flow field direction and intensity, feature for crystallizer flow field, can quick and precisely judge the form of stream thigh in crystallizer and the power variation in flow field, operator can pass through to adjust pulling rate, the submersed nozzle degree of depth, change the stable of the measure crystallization control device flow fields such as submersed nozzle, thereby improves the inside and outside quality of strand.
For achieving the above object, the present invention adopts following technical scheme to realize:
A kind of method of measuring crystallizer flow field direction and intensity, utilize flow field intensity indicator to monitor intensity and the direction of the crystallizer flow field in casting cycle, shearing slag possibility to slag interface in crystallizer is made qualitative analysis, the foundation of adjusting as crystallizer correlation parameter, its concrete operation step is as follows:
1) the flow measurement plate of flow field intensity indicator is inserted to crystallizer liquid steel level, wherein for double fluid strand crystallizer, its flow measurement plate deflection mouth of a river side, for single current thigh crystallizer, its flow measurement plate deflection narrow copper plate side;
2), according to the yawing moment of flow measurement plate and deflection angle, determine the direction of stream thigh in crystallizer and the intensity of crystallizer surface MOLTEN STEEL FLOW;
3) according to the indication of flow field intensity indicator, can estimate the size of molten steel in mold liquid level and crystallizer protecting residue interface flow velocity, thereby instruct crystallizer further adjust and safeguard.
The flow field intensity indicator adopting in said method, comprise hanger, horizontal runners, hook and flow measurement plate, hanger bottom is symmetrical is respectively provided with a horizontal runners, hanger is provided with hook and index dial, it is upper that flow measurement plate is hung on hook, and described flow measurement plate is by pointer, link, connecting rod and floating molecular integral structure.
A levelling bolt is respectively established at the two ends of described horizontal runners.
On described hanger, be respectively equipped with transverse horizontal bubble and vertical equity bubble.
Compared with prior art, the invention has the beneficial effects as follows: for the result detecting, operator can contrast for different steel grades, different strand width specifications, different pulling rate, different submersed nozzle insertion depth and blowing argon gas flow etc., draw the Changing Pattern of crystallizer flow field under different condition, and then can the type of flow of molten steel in mold be adjusted, be controlled and optimize, improve the inside and outside quality of strand.
Accompanying drawing explanation
Fig. 1 is flow field of the present invention intensity indicator example structure schematic diagram;
Fig. 2 is the vertical view of Fig. 1.
In figure: the horizontal runners 3-hook of 1-hanger 2-4-flow measurement plate 5-index dial 6-pointer 7-link 8-connecting rod 9-float 10-levelling bolt 11-transverse horizontal bubble 12-vertical equity bubble
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention one step is illustrated:
See Fig. 1, Fig. 2, it is flow field of the present invention intensity indicator example structure schematic diagram, comprise hanger 1, horizontal runners 2, hook 3 and flow measurement plate 4, hanger 1 bottom is symmetrical is respectively provided with a horizontal runners 2, hanger 1 is provided with hook 3 and index dial 5, flow measurement plate 4 is hung on hook 3, the integral structure that flow measurement plate 4 is comprised of pointer 6, link 7, connecting rod 8 and float 9.A levelling bolt 10 is respectively established at the two ends of horizontal runners 2.On hanger 1, be respectively equipped with transverse horizontal bubble 11 and vertical equity bubble 12, before test, need to adjust levelling bolt 10, make transverse horizontal bubble 11 and vertical equity bubble 12 all be positioned at meta.
Flow field of the present invention intensity indicator needs to adjust before use, first marks putting position suitable on crystallizer, and flow field intensity indicator is put on crystallizer; Adjust leveling bolt 10, by horizontal runners 2 leveling; Adjust the length of connecting rod 8, guarantee that flow measurement plate 4 can be inserted into below molten steel in mold liquid level, hangs over the link with flow measurement plate 7 on hook 3.Wherein connecting rod 8 and pointer 6 preferably adopt light material (as wooden or aluminium alloy matter etc.), flow measurement plate can adopt wooden or other be not soluble in the material of molten steel.Accurate in order to guarantee measurement result, when being used, each measurement to change flow measurement plate 4.
A kind of method of measuring crystallizer flow field direction and intensity of the present invention, to utilize flow field intensity indicator to monitor intensity and the direction of the crystallizer flow field in casting cycle, shearing slag to slag interface in crystallizer may be made qualitative analysis, the foundation of adjusting as crystallizer correlation parameter, its concrete operation step is as follows:
1) the flow measurement plate of flow field intensity indicator is inserted to crystallizer liquid steel level, wherein for double fluid strand crystallizer, its flow measurement plate deflection mouth of a river side, for single current thigh crystallizer, its flow measurement plate deflection narrow copper plate side;
2), according to the yawing moment of flow measurement plate and deflection angle, determine the direction of stream thigh in crystallizer and the intensity of crystallizer surface meniscus place MOLTEN STEEL FLOW;
3) according to the indication of flow field intensity indicator, can estimate the size of molten steel in mold liquid level and crystallizer protecting residue interface flow velocity; thereby instruct crystallizer further to adjust, optimize and safeguard, such as correspondingly taking to adjust pulling rate, the submersed nozzle degree of depth, changing the measures such as submersed nozzle.
Claims (4)
1. a method of measuring crystallizer flow field direction and intensity, it is characterized in that, utilize flow field intensity indicator to monitor intensity and the direction of the crystallizer flow field in casting cycle, shearing slag possibility to slag interface in crystallizer is made qualitative analysis, the foundation of adjusting as crystallizer correlation parameter, its concrete operation step is as follows:
1) the flow measurement plate of flow field intensity indicator is inserted to crystallizer liquid steel level, wherein for double fluid strand crystallizer, its flow measurement plate deflection mouth of a river side, for single current thigh crystallizer, its flow measurement plate deflection narrow copper plate side;
2), according to the yawing moment of flow measurement plate and deflection angle, determine the direction of stream thigh in crystallizer and the intensity of crystallizer surface MOLTEN STEEL FLOW;
3) according to the indication of flow field intensity indicator, can estimate the size of molten steel in mold liquid level and crystallizer protecting residue interface flow velocity, thereby instruct crystallizer further adjust and safeguard.
2. the flow field intensity indicator adopting in method described in claim 1, it is characterized in that, comprise hanger, horizontal runners, hook and flow measurement plate, hanger bottom is symmetrical is respectively provided with a horizontal runners, hanger is provided with hook and index dial, it is upper that flow measurement plate is hung on hook, and described flow measurement plate is by pointer, link, connecting rod and floating molecular integral structure.
3. flow field according to claim 2 intensity indicator, is characterized in that, a levelling bolt is respectively established at the two ends of described horizontal runners.
4. flow field according to claim 2 intensity indicator, is characterized in that, is respectively equipped with transverse horizontal bubble and vertical equity bubble on described hanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310714686.6A CN103743539A (en) | 2013-12-20 | 2013-12-20 | Method for measuring flow field direction and intensity in crystallizer and flow field intensity indicator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310714686.6A CN103743539A (en) | 2013-12-20 | 2013-12-20 | Method for measuring flow field direction and intensity in crystallizer and flow field intensity indicator |
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| CN103743539A true CN103743539A (en) | 2014-04-23 |
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| CN201310714686.6A Pending CN103743539A (en) | 2013-12-20 | 2013-12-20 | Method for measuring flow field direction and intensity in crystallizer and flow field intensity indicator |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107357953A (en) * | 2017-06-02 | 2017-11-17 | 首钢总公司 | A kind of method that nozzle blocking is analyzed according to heat flow density |
| CN110116196A (en) * | 2019-05-27 | 2019-08-13 | 南京钢铁股份有限公司 | A kind of device of measurement vortex crystallizer submersed nozzle insertion depth |
| CN113172207A (en) * | 2021-04-09 | 2021-07-27 | 北京科技大学 | Device for measuring surface flow field of molten steel in crystallizer based on current change |
| CN113311513A (en) * | 2021-06-04 | 2021-08-27 | 王金帅 | Hydrology monitoring devices with fault diagnosis function |
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2013
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Cited By (4)
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|---|---|---|---|---|
| CN107357953A (en) * | 2017-06-02 | 2017-11-17 | 首钢总公司 | A kind of method that nozzle blocking is analyzed according to heat flow density |
| CN110116196A (en) * | 2019-05-27 | 2019-08-13 | 南京钢铁股份有限公司 | A kind of device of measurement vortex crystallizer submersed nozzle insertion depth |
| CN113172207A (en) * | 2021-04-09 | 2021-07-27 | 北京科技大学 | Device for measuring surface flow field of molten steel in crystallizer based on current change |
| CN113311513A (en) * | 2021-06-04 | 2021-08-27 | 王金帅 | Hydrology monitoring devices with fault diagnosis function |
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