CN1788883A - Detecting tool and method for crystallizer protective slag - Google Patents
Detecting tool and method for crystallizer protective slag Download PDFInfo
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- CN1788883A CN1788883A CN 200410089438 CN200410089438A CN1788883A CN 1788883 A CN1788883 A CN 1788883A CN 200410089438 CN200410089438 CN 200410089438 CN 200410089438 A CN200410089438 A CN 200410089438A CN 1788883 A CN1788883 A CN 1788883A
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- iron wire
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Abstract
The present invention is protecting slag detecting tool and method for detecting the thickness of the liquid slag layer, the sintered layer and the powder slag layer of the protecting slag in crystallizer of continuous slab casting machine. The detecting tool consists of copper pipe handle, wood or asbestos board, wooden clamp on the board, iron nail, and copper coated iron wire or one iron wire and one copper wire in the same length through the copper pipe and the board. During use, the copper coated iron wire or the iron wire and copper wire is inserted into molten steel inside the crystallizer for 4 sec before being withdrawn while the board is floated on the molten steel surface. The thickness of the liquid slag layer, the sintered layer and the powder slag layer is detected based on the corrosion and color change of the copper coated iron wire or the iron wire and copper wire. The detecting tool of the present invention has the service life as long as 600 heats of steel.
Description
One, technical field:
The present invention relates to water the testing tool and the detection method thereof of steel covering slag, particularly the testing tool of slab caster mould covering slag and detection method thereof.
Two, background technology:
The covering slag structure is followed successively by slag layer, sinter layer and liquid slag layer from top to bottom in the slab caster mould, mainly act as: adiabatic heat-insulation; Secluding air prevents secondary oxidation of steel; The absorption molten steel is mingled with purify hot metal; Between crystallizer wall and molten steel solidification shell, form layer protecting film, reduce resistance of billet withdrawal; Prevent molten steel solidification shell and crystallizer wall adhesion, form the adhesion bleed-out; Fill the air gap between molten steel solidification shell and the crystallizer wall, improve the crystallizer heat transfer condition, prevent bleed-out and slab defect occurs.In process of billet withdrawal; because crystallizer up-down vibration and molten steel solidification shell move downward; the liquid slag layer of liquid steel level is constantly clamp-oned between base shell and the copper coin wall by the interface of molten steel and crystallizer copper wooden partition; forming the slag film is diaphragm; carrying out along with throwing; the liquid slag layer of liquid steel level constantly consumes, and sinter layer drops to the molten steel face and is fused into liquid slag layer, simultaneously; slag layer descends and becomes sinter layer; add covering slag toward crystallizer again, make it become slag layer, so circulation; keeping the covering slag structure is three-decker; in steel pouring process, covering slag constantly is consumed, and constantly replenishes.When watering steel, the normal thickness of liquid slag layer is 6～15 millimeters, liquid slag layer is too thin, and the melt cinder deficiency between crystallizer wall and the molten steel solidification shell causes solidified shell and crystallizer wall adhesion, form the adhesion bleed-out, liquid slag layer is too thick, and it is too many to show that then melt cinder absorption is mingled with, the covering slag performance depreciation, it is big that viscosity becomes, mobile bad, absorption is mingled with ability and weakens, and enters the melt cinder uneven thickness between crystallizer wall and the solidified shell, cause molten steel solidification thickness of the shell inequality, in the effect of thermal stress, when the molten steel solidification shell goes out the crystallizer end opening, can crack, form slab defect, cause the crackle bleed-out when serious; The normal thickness of sinter layer is 5～8 millimeters, too thick or too thinly all can influence liquid slag layer thickness; The normal thickness of slag layer is 5～10 millimeters, and slag layer is too thin, does not have insulation effect, causes sinter layer, liquid slag layer attenuation; Slag layer is too thick, causes the slag bar to increase, and causes the slag inclusion bleed-out when serious.Therefore, the quality of crystallizer protecting residue slag condition is directly connected to and waters steel production direct motion and slab quality quality.The levels of precision of covering slag thickness testing tool and detection method thereof directly influences the judgement of operative employee to the slag condition.
Conventional detection is: monofilament method and double-thread method.The monofilament method, testing tool is made up of the iron wire of wearing a copper coating in a metal tube, the metal tube, during detection, water the steel worker and grasp metal tube, copper coated iron wire in the metal tube is inserted in the crystallizer molten steel, and held stationary after 4 seconds takes out copper coated iron wire, the length of copper coated iron wire copper coating melting loss is crystallizer liquid slag layer thickness; Double-thread method, testing tool is formed by wearing length identical a copper wire and an iron wire in a metal tube, the metal tube, during detection, water the steel worker and grasp metal tube, copper wire in the metal tube and iron wire are inserted in the crystallizer molten steel, and held stationary after 4 seconds takes out copper wire and iron wire, the melting loss length of copper wire and the melting loss length of iron wire poor is crystallizer liquid slag layer thickness.In monofilament method and the double-thread method, another kind of testing tool is drilled with the metal tube of through hole by middle tube wall, a copper wire and an iron wire that copper coated iron wire or length are identical are formed, with copper coated iron wire or an identical copper wire and the iron wire of length, penetrate by metal tube one end, pass from the metal tube aperture, it is suitable for reading then metal tube to be placed on crystallizer, to pass identical copper wire of copper coated iron wire or length and iron wire from the metal tube aperture inserts in the crystallizer molten steel, after 4 seconds copper coated iron wire or identical copper wire and the iron wire of length are taken out, using the same method draws crystallizer liquid slag layer thickness.Reasons such as the shake of these two kinds of methods staff owing to detecting, mold oscillation, liquid level fluctuation of molten steel, cause measuring inaccurate, error is bigger, and the correct judgement of steel worker to crystallizer slag condition watered in influence, cause the generation of crystallizer bleed-out accident, have a strong impact on and water the direct motion that steel is produced.
Three, summary of the invention:
The objective of the invention is: a kind of testing tool and detection method thereof of crystallizer protecting residue are provided, solve the technological deficiency that prior art can not accurately be measured the liquid slag layer of slab caster mould covering slag, sinter layer, slag layer thickness.Concrete technical scheme is as follows: a kind of testing tool of crystallizer protecting residue and detection method thereof, by copper pipe, wood clamp, plank or asbestos board, iron nail, diameter is that 1.5～2mm copper coated iron wire or length identical a copper wire and an iron wire are formed, be installed with copper coated iron wire or length identical a copper wire and an iron wire in the copper pipe, copper pipe is the operating grip of testing tool, wood clamp is fixed on plank or the asbestos board by iron nail, it is characterized in that: the plank center is drilled with through hole, after the copper wire that copper coated iron wire or length are identical and an iron wire pass from copper pipe, fix with wood clamp, from the plank centre bore, pass again, wood clamp is used for fixing copper coated iron wire or copper wire and iron wire, copper coated iron wire or copper wire and iron wire are by plank and crystallizer liquid steel level relative fixed, during detection, water the steel worker and grasp copper pipe, the copper coated iron wire or identical copper wire and the iron wire of length that pass plank are inserted in the crystallizer molten steel, and plank is swum on the crystallizer liquid steel level, held stationary after 4 seconds takes out copper coated iron wire or copper wire and iron wire; The monofilament method, insert the copper coated iron wire of molten steel end, highlights divides and the length of sticking a little covering slag is liquid slag layer thickness, color change slightly the part length be sinter layer thickness, below the plank not the length of variable color part be slag layer thickness, liquid slag layer, sinter layer, slag layer thickness sum are the covering slag gross thickness; Double-thread method; insert the identical copper wire of length and the iron wire of molten steel end; the difference of the melting loss length of copper wire and the melting loss length of iron wire is a crystallizer liquid slag layer thickness; the copper wire color change slightly the part length be sinter layer thickness; the following copper wire of the plank not length of variable color part is a slag layer thickness, and liquid slag layer, sinter layer, slag layer thickness sum are the covering slag gross thickness.
The effect that the present invention has:
(1), simple to operate, overcome and watered the influence of steel worker hand shake and crystallizer liquid level fluctuation of molten steel testing result, can accurately measure liquid slag layer, sinter layer, the slag layer thickness of slab caster mould covering slag.
(2), testing tool is simple for production, with low cost.
(3), detection method is simple, practical, waters the steel worker and can accurately judge slab caster mould slag condition, guarantees to water steel production direct motion.
(4), reach the service life of testing tool of the present invention more than the cast 600 stove molten steel.
Four, description of drawings:
Fig. 1 is a structural representation of the present invention
Fig. 2 uses schematic diagram for the present invention
Fig. 3 is the structural representation of wood clamp of the present invention
Fig. 4 is the vertical view of plank of the present invention
Among the figure: 1-plank, 2-through hole, 3-wood clamp spring, 4-copper coated iron wire, 5-iron nail, 6-wood clamp, 7-copper pipe, 8-copper plate of crystallizer, 9-slab solidified shell, 10-liquid slag layer, 11-sinter layer, 12-slag layer, 13-molten steel, 14-slag film.
Five, the specific embodiment
Consult Fig. 1,2,3,4; a kind of testing tool of crystallizer protecting residue and detection method thereof; form by copper pipe 7, wood clamp 6, plank 1, iron nail 5, copper coated iron wire 4; copper pipe 7 length are 0.7m; diameter is 1 minute; copper coated iron wire 4 diameters are 2mm; the length of plank 1 * wide * thick is 70mm * 50mm * 15mm; wood clamp 6 is fixed on plank 1 by iron nail 5, and wood clamp spring 3 is arranged on the wood clamp, and plank 1 center is drilled with through hole 2; the diameter of through hole 2 is 3mm; be installed with copper coated iron wire 4 in the copper pipe 7, copper coated iron wire 4 is fixing by wood clamp 6, and the through hole 2 from plank 1 center passes 80mm again.During detection; water the steel worker and grasp copper pipe 7; the copper coated iron wire 4 that passes plank 1 is inserted in crystallizer (crystallizer is made of the copper plate of crystallizer 8) molten steel; and plank 1 is swum on crystallizer molten steel 13 liquid levels; held stationary; after 4 seconds copper coated iron wire 4 is taken out; insert the copper coated iron wire 4 of molten steel end; highlights divides and the length of sticking a little covering slag is liquid slag layer thickness; color change slightly the part length be sinter layer thickness; plank below 1 not the length of variable color part be slag layer thickness, liquid slag layer 10; sinter layer 11; slag layer 12 thickness sums are the covering slag gross thickness.Molten steel can form slab solidified shell 9 in crystallizer, covering slag can form slag film 14 at molten steel surface.
The present invention can accurately measure liquid slag layer, sinter layer, the slag layer thickness of slab caster mould covering slag.
Claims (3)
1, a kind of testing tool of crystallizer protecting residue; it is characterized in that: form by copper pipe [7], wood clamp [6], plank [1], iron nail [5], copper coated iron wire [4]; wood clamp [6] is fixed on plank [1] by iron nail [5]; plank [1] center is drilled with through hole [2]; be installed with copper coated iron wire [4] in the copper pipe [7]; copper coated iron wire [4] is fixing by wood clamp [6], and the through hole [2] from plank [1] center passes again.
2, the testing tool of a kind of crystallizer protecting residue according to claim 1 is characterized in that: the diameter of copper coated iron wire [4] is 1.5～2mm.
3; the detection method of the testing tool of the described a kind of crystallizer protecting residue of claim 1; it is characterized in that: detection may further comprise the steps: during detection; water the steel worker and grasp copper pipe [7]; the copper coated iron wire [4] that will pass plank [1] inserts in the crystallizer molten steel; and plank [1] is swum on the crystallizer liquid steel level; held stationary; after 4 seconds copper coated iron wire [4] is taken out; insert the copper coated iron wire [4] of molten steel end; highlights divides and the length of sticking a little covering slag is liquid slag layer thickness; color change slightly the part length be sinter layer thickness; below the plank [1] not the length of variable color part be slag layer thickness, liquid slag layer; sinter layer; slag layer thickness sum is the covering slag gross thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100894388A CN1315598C (en) | 2004-12-13 | 2004-12-13 | Detecting tool and method for crystallizer protective slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100894388A CN1315598C (en) | 2004-12-13 | 2004-12-13 | Detecting tool and method for crystallizer protective slag |
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| Publication Number | Publication Date |
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| CN1788883A true CN1788883A (en) | 2006-06-21 |
| CN1315598C CN1315598C (en) | 2007-05-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100894388A Expired - Fee Related CN1315598C (en) | 2004-12-13 | 2004-12-13 | Detecting tool and method for crystallizer protective slag |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100455990C (en) * | 2006-06-30 | 2009-01-28 | 宝山钢铁股份有限公司 | Method and apparatus for measuring protection slag thickness in continuous casting crystallizer in |
| CN102284688A (en) * | 2011-08-26 | 2011-12-21 | 莱芜钢铁股份有限公司 | Device for detecting crystallizer liquid slag layer of continuous casting machine |
| CN102384731A (en) * | 2011-10-09 | 2012-03-21 | 安徽工业大学 | Method and device for measuring thickness of refining slag within refining ladle |
| CN103837062A (en) * | 2014-02-21 | 2014-06-04 | 山西太钢不锈钢股份有限公司 | Method for detecting casting powder situation of crystallizer |
| CN104209480A (en) * | 2014-09-29 | 2014-12-17 | 湖南镭目科技有限公司 | Slag thickness detection and slag adding prediction method and system |
| CN105458203A (en) * | 2015-12-23 | 2016-04-06 | 北京科技大学 | Method for measuring liquid level fluctuation of crystallizer and flow field symmetry |
| CN105798251A (en) * | 2016-03-22 | 2016-07-27 | 首钢总公司 | Method for controlling fluctuation of liquid level of continuous casting crystallizer |
| CN106825476A (en) * | 2016-12-28 | 2017-06-13 | 内蒙古包钢钢联股份有限公司 | The measuring method of Tundish Covering Flux for Continuous Casting molten steel surface slag blanket structure |
| CN106871838A (en) * | 2017-02-19 | 2017-06-20 | 郑州云海信息技术有限公司 | A kind of method for testing golden finger order of contact |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2572401Y (en) * | 2002-09-04 | 2003-09-10 | 武汉钢铁(集团)公司 | Protective slag smelting speed tester |
| CN1281360C (en) * | 2003-10-10 | 2006-10-25 | 西峡龙成冶材集团有限公司 | Speical superthin slab continuous cast crystallizer protecing slay and production process thereof |
| CN2660514Y (en) * | 2003-12-19 | 2004-12-01 | 宝钢集团上海梅山有限公司 | Slag viscosity tester |
-
2004
- 2004-12-13 CN CNB2004100894388A patent/CN1315598C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100455990C (en) * | 2006-06-30 | 2009-01-28 | 宝山钢铁股份有限公司 | Method and apparatus for measuring protection slag thickness in continuous casting crystallizer in |
| CN102284688A (en) * | 2011-08-26 | 2011-12-21 | 莱芜钢铁股份有限公司 | Device for detecting crystallizer liquid slag layer of continuous casting machine |
| CN102384731A (en) * | 2011-10-09 | 2012-03-21 | 安徽工业大学 | Method and device for measuring thickness of refining slag within refining ladle |
| CN103837062A (en) * | 2014-02-21 | 2014-06-04 | 山西太钢不锈钢股份有限公司 | Method for detecting casting powder situation of crystallizer |
| CN104209480A (en) * | 2014-09-29 | 2014-12-17 | 湖南镭目科技有限公司 | Slag thickness detection and slag adding prediction method and system |
| CN104209480B (en) * | 2014-09-29 | 2016-08-24 | 湖南镭目科技有限公司 | A kind of slag thickness detects and adds slag Forecasting Methodology and system |
| US10213827B2 (en) | 2014-09-29 | 2019-02-26 | Hunan Ramon Science & Technology Co., Ltd. | Slag thickness detection and slag adding prediction method and system |
| CN105458203A (en) * | 2015-12-23 | 2016-04-06 | 北京科技大学 | Method for measuring liquid level fluctuation of crystallizer and flow field symmetry |
| CN105458203B (en) * | 2015-12-23 | 2017-06-20 | 北京科技大学 | A kind of method for measuring liquid level fluctuation of crystallizer and flow field symmetry |
| CN105798251A (en) * | 2016-03-22 | 2016-07-27 | 首钢总公司 | Method for controlling fluctuation of liquid level of continuous casting crystallizer |
| CN106825476A (en) * | 2016-12-28 | 2017-06-13 | 内蒙古包钢钢联股份有限公司 | The measuring method of Tundish Covering Flux for Continuous Casting molten steel surface slag blanket structure |
| CN106871838A (en) * | 2017-02-19 | 2017-06-20 | 郑州云海信息技术有限公司 | A kind of method for testing golden finger order of contact |
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| Publication number | Publication date |
|---|---|
| CN1315598C (en) | 2007-05-16 |
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Granted publication date: 20070516 Termination date: 20131213 |