CN1593814A - Gas permeation type cinder dam - Google Patents
Gas permeation type cinder dam Download PDFInfo
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- CN1593814A CN1593814A CN 200410041026 CN200410041026A CN1593814A CN 1593814 A CN1593814 A CN 1593814A CN 200410041026 CN200410041026 CN 200410041026 CN 200410041026 A CN200410041026 A CN 200410041026A CN 1593814 A CN1593814 A CN 1593814A
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- slag weir
- weir
- gas permeable
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- permeable devices
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Abstract
The invention relates to a technology which uses up blowing argon gas to ameliorate steel liquid skim weir of the continuous casting middle bag. The invention sets argon blowing device in the lower place of the skim weir. And the argon gas is supplied through the gas supplying pipe. The invention not only has skimming function, also removes the impurity better. About 90 percent hypobaric impurity can be removed, and the hyperbaric about 60 percent. The impurity brought out by widening the skim weir bore can be removed completely. The invention improves the metallurgy quality and the fluid of the middle bag, makes temperature and compound of the steel fluid well-proportioned, so that smelt and clean the steel fluid.
Description
Technical field
The invention relates to improvement, relate in particular to a kind of can the generation and go up, improve the slag weir that molten steel flows to air-flow to continuous casting tundish slag weir.
Background technology
Tundish is the molten steel memory allocation container between big bag and the crystallizer, is most important liquid steel refining equipment in the casting process, is one of key factor of decision molten steel degree of purity.Therefore adopt usually in the continuous casting process tundish slag weir be set, with improve flow field of molten steel, reach help in the molten steel small field trash and harmful element can effective collision, the come-up of growing up, absorbed by the top coverture and obtain removal.The Rational flow field of molten steel in the tundish, it is the prerequisite that promotes that removal is assembled, grown up and float to field trash and harmful element in the tundish molten steel, yet, for reducing the molten steel net pressure slag weir is influenced, the slag weir opening diameter is big and quantity is many, make that often flow velocity was very low after steel flow was crossed slag weir, the flow field is undesirable, and molten steel can't be as flowing under the emulation mode.Owing to do not have to stir power, therefore actual more be molten steel through behind the slag weir, directly flow further downstream enters crystallizer.Microinclusions and harmful element in the molten steel like this, the power that can not get the rising eliminating of fully to float, flow directly into crystallizer and therefrom wrap, make the slag weir function be restricted, even can not bring into play the effect of tundish covering flux dross inclusion adsorption and harmful element with molten steel.Secondly, water time lengthening along with connecting, slag weir is corroded gradually, causes steel outlet hole directly to enlarge, and not only more comparatively ideal flow field is given birth in difficult labour, and slag weir erosion itself also becomes the source of casting blank foreign matter.Besides, molten steel is through slag weir, and as there not being the power of stirring, it is inhomogeneous to flow, and not only can cause liquid steel temperature inhomogeneous, and the tundish flow field can not get abundant optimization, also can cause the dead band sometimes, seriously can cause production accident.Therefore, Argon is one of important means that addresses the above problem in tundish, but by stopper or argon blowing, causes turbulent flow and volume slag phenomenon easily, and practice effect is bad.Air curtain barricade wall mixes the slag of impact zone and middle covering agent and dashes, and is easy to generate secondary oxidation again, and steel stream can not concentrate, and uses also to be restricted.This shows that the mode of Argon and Argon position are whether effectively to determine key factor.
Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned prior art, provide a kind of and can effectively improve and optimize tundish MOLTEN STEEL FLOW field, not only can effectively remove harmful element and small field trash in the molten steel, purify hot metal, but also even molten steel temperature in tundish, the favourable continuous casting that obtains clean steel is with tundish vapor-permeable type slag weir.
The object of the invention realizes, the main improvement is to have set up the air blowing gas permeable devices at slag weir downstream lower bottom part, make steel flow cross the stirring of under the air-flow guiding that the air blowing gas permeable devices blows out, rolling behind the slag weir, to obtain molten steel field of flow preferably,, drive field trash and harmful element come-up remove thereby being capped agent absorption; Blow to the stirring of molten steel also even liquid steel temperature simultaneously.Specifically, vapor-permeable type slag weir of the present invention is characterized in that slag weir downstream lower bottom part has the air blowing gas permeable devices, and described gas permeable devices is supplied with source of the gas by air supply channel.
According to above-mentioned design, the said gas permeable devices of the present invention, its ventilation mouth can be arranged on side (intersecting at slag weir), produce the horizontal air-flow that goes out; Also can be set to up, in the formation to air-flow; Can also be at last oblique air-flow between reaching laterally.The present invention especially with oblique upper reaches for well, can reduce ascending air and molten steel washing away like this to slag weir.The ventilative seam of gas permeable devices can be diffusion-type, through-type, slit-type, star stripe shape etc., and various ventilative seams are all applicable, have no special requirements.Ventilative seam (or aperture) generally with≤0.1mm is excellent, this can guarantee through-blowing rate, again can anti-molten steel infiltration.
Said gas permeable devices, according to the tundish shape, slag weir and ventilated element can be made various geometries, as vertical bar shaped, V-shape, circular arc etc., to increase adaptability.Gas permeable devices better is to be laterally outwards to protrude, and is attached to bottom, slag weir downstream.
Said gas permeable devices width wherein a kind ofly is preferably smaller than the slag weir width, and a certain amount of space such as 100-150mm are left in two ends, this be because, the steel outlet hole of slag weir is generally driveed in the middle part, argon gas stream faces the perforate position, can strengthen clean-up effect; Also can prevent washing away of Argon air-flow centering bag working lining in addition, cause the damage of working lining and the increase of field trash.
The gas permeable devices source of the gas is supplied with, and a kind of better mode is to be embedded in the slag weir, and its tracheae can be a steel, also can be refractory material matter, makes simple relatively, reliability.But air supply pipe of the present invention also can be embedded in the tundish permanent liner, and these unsubstantialities are changed and all belonged to protection domain of the present invention.
The present invention is owing to increase the ventilated element of upwards blowing at slag weir downstream lower bottom part compound (especially laterally outwards protruding), both keep slag weir control stream and isolated bale slag-blanking and tundish refining slag function, the air-flow that air blowing simultaneously forms, effectively improved again and flow through the slag weir flow field of molten steel in the tundish, not only can make field trash and harmful element increase effective collision in the molten steel, grow up and float probability, make it to guide calcareous coverture into to air-flow with last, be adsorbed and remove, improve the clearance of field trash and harmful element, the results showed, after adopting this technology, the low power field trash can remove 90%, the high power field trash can be removed more than 60%, because of the field trash that the slag weir reaming produces can all be removed.Effectively alleviated field trash and flowed directly into the deficiency of crystallizer, thereby improved the metallurgical effect of middle bag, reached the purpose of refining and purifying of steel with molten steel.After adopting this technology, the Zhong Bao flow field is more reasonable, and temperature, composition are more even, and test shows, wherein wrap temperature difference can be controlled in ± 5 ℃.
Vapor-permeable type slag weir of the present invention and similar products at home and abroad (slag weir) technical performance are relatively
| Technical performance | The present invention | Air curtain barricade wall | Domestic like product |
| Compression strength (Mpa) | ≥82 | ≥82 | ≥80 |
| Connect and water the time (h) | 20 | 20 | 16 |
| Air permenbility (m 3) | 2～8 | 3～8 (splits) | Do not have |
| High power is mingled with clearance (%) | ≥60％ | ≥30％ | Do not have |
| The middle bag temperature difference (℃) | ±5 | ±8 | ±10 |
Below in conjunction with several specific embodiment, further specify the present invention, but embodiment should not be construed as to concrete qualification of the present invention.
Description of drawings
Fig. 1 is a vapor-permeable type slag weir operation principle schematic diagram of the present invention.
Fig. 2 is a first embodiment of the invention vapor-permeable type slag weir plan structure schematic diagram.
Fig. 3 is a second embodiment of the invention vapor-permeable type slag weir plan structure schematic diagram.
Fig. 4 is a third embodiment of the invention vapor-permeable type slag weir plan structure schematic diagram.
The specific embodiment
Embodiment 1: referring to Fig. 1,2, the vapor-permeable type slag weir, comprise slag weir 2, vertically be embedded with air supply pipe 8 in it, bottom, slag weir downstream is attached with the air blowing gas permeable devices 6 that laterally outwards protrudes, have on it≤air blowing of 0.1mm seam 7, air supply pipe links to each other with the seam of blowing, and Air permenbility is adjustable in from 501/min to the 2501/min scope.Air blowing gas permeable devices width is less than slag weir, and the two ends indentation is 100-150mm for example.
Embodiment 2: referring to Fig. 3, as described above, slag weir 2 is V-shape, and the air blowing gas permeable devices 6 of the outside protrusion that its downstream lower bottom part adheres to is similar shape with it, also is the V structure.
Embodiment 3: referring to Fig. 4, as described above, slag weir 2 is circular arc type, and the air blowing gas permeable devices 6 of the outside protrusion that its downstream lower bottom part adheres to is similar shape with it, also is the circular arc type structure.
Because it is multiple that the version of tundish has, so the slag weir shape also can have other shapes, and slag weir can be installed two at tundish, or the like all belong to protection domain of the present invention.
For convenience of description, the said molten steel of the present invention, molten steel are synonym; Said slag weir comprises slag blocking wall.
Claims (8)
1, a kind of vapor-permeable type slag weir is characterized in that slag weir downstream lower bottom part has the air blowing gas permeable devices, and described gas permeable devices is supplied with source of the gas by air supply channel.
2,, it is characterized in that said gas permeable devices and slag weir are combined into one according to the described vapor-permeable type slag weir of claim 1.
3,, it is characterized in that said gas permeable devices is in bottom, slag weir downstream according to the described vapor-permeable type slag weir of claim 2.
4,, it is characterized in that said gas permeable devices outwards protrudes according to the described vapor-permeable type slag weir of claim 3.
5,, it is characterized in that said gas permeable devices ventilation mouth upwards or obliquely according to the described vapor-permeable type slag weir of claim 1.
6,, it is characterized in that said gas permeable devices slit (or aperture)≤0.1mm that breathes freely according to the described vapor-permeable type slag weir of claim 1.
7, according to claim 1,2,3,4,5 or 6 described vapor-permeable type slag weirs, it is characterized in that said gas permeable devices width two ends indentation, less than the slag weir width.
8,, it is characterized in that said gas permeable devices source of the gas pipe is embedded in the slag weir according to the described vapor-permeable type slag weir of claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410041026 CN1289234C (en) | 2004-06-18 | 2004-06-18 | Gas permeation type cinder dam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410041026 CN1289234C (en) | 2004-06-18 | 2004-06-18 | Gas permeation type cinder dam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1593814A true CN1593814A (en) | 2005-03-16 |
| CN1289234C CN1289234C (en) | 2006-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410041026 Expired - Fee Related CN1289234C (en) | 2004-06-18 | 2004-06-18 | Gas permeation type cinder dam |
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| Country | Link |
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| CN (1) | CN1289234C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102642017A (en) * | 2012-04-17 | 2012-08-22 | 莱芜钢铁集团有限公司 | Ladle bottom structure of continuous casting ladle |
| CN102764868A (en) * | 2012-07-11 | 2012-11-07 | 北京科技大学 | Blowing and refining device and method used for removing tundish molten steel inclusion |
| CN103231020A (en) * | 2013-05-04 | 2013-08-07 | 日月重工股份有限公司 | Slag blocking sprue for casting |
-
2004
- 2004-06-18 CN CN 200410041026 patent/CN1289234C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102642017A (en) * | 2012-04-17 | 2012-08-22 | 莱芜钢铁集团有限公司 | Ladle bottom structure of continuous casting ladle |
| CN102764868A (en) * | 2012-07-11 | 2012-11-07 | 北京科技大学 | Blowing and refining device and method used for removing tundish molten steel inclusion |
| CN102764868B (en) * | 2012-07-11 | 2015-01-07 | 北京科技大学 | Blowing and refining device and method used for removing tundish molten steel inclusion |
| CN103231020A (en) * | 2013-05-04 | 2013-08-07 | 日月重工股份有限公司 | Slag blocking sprue for casting |
| CN103231020B (en) * | 2013-05-04 | 2015-04-29 | 日月重工股份有限公司 | Slag blocking sprue for casting |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1289234C (en) | 2006-12-13 |
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Owner name: YIXING ZHENQIU FURNACE MATERIAL CO., LTD.; APPLIC Free format text: FORMER OWNER: YIXING ZHENQIU FURNACE MATERIAL CO., LTD. Effective date: 20060811 |
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Effective date of registration: 20060811 Address after: 214266 Hong Kong Village, Xinzhuang Town, Jiangsu, Yixing Applicant after: Yixing Zhenqiu Furnace Material Co., Ltd. Co-applicant after: Northeastern University Address before: 214266 Hong Kong Village, Xinzhuang Town, Jiangsu, Yixing Applicant before: Yixing Zhenqiu Furnace Material Co., Ltd. |
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20061213 Termination date: 20160618 |