CN103341622A - Method for prolonging service life of continuous casting immersion type water opening - Google Patents
Method for prolonging service life of continuous casting immersion type water opening Download PDFInfo
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- CN103341622A CN103341622A CN2013102578257A CN201310257825A CN103341622A CN 103341622 A CN103341622 A CN 103341622A CN 2013102578257 A CN2013102578257 A CN 2013102578257A CN 201310257825 A CN201310257825 A CN 201310257825A CN 103341622 A CN103341622 A CN 103341622A
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- submersed nozzle
- continuous casting
- tundish
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- slag layer
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Abstract
The invention provides a method for prolonging the service life of a continuous casting immersion type water opening. The method comprises the steps of guaranteeing that the immersion type water opening is eroded to a preset degree on the liquid powder layer part of casting powder, and then adjusting the height of a tundish downwards to enable the contacting position between the immersion type water opening and the liquid powder layer part of the casting powder to be changed. Therefore, the service life of the continuous casting immersion type water opening is prolonged. According to the method, the continuous casting furnace number of a single tundish can be improved and the cost of continuous casting refractory materials can be lowered.
Description
Technical field
The invention belongs to the production field of conticaster, specifically, the present invention relates to a kind of continuous casting submersed nozzle method in service life that prolongs.
Background technology
Continuous casting technology is one liquid metals is cast into the strand new technology of certain section configuration continuously through one group of special cooling and bracing or strutting arrangement that its appearance has fundamentally changed the steel ingot-first roll process that has dominated since the century.Annotating steel technology with traditional mould compares, plurality of advantages such as continuous casting steel machine has production process simplification, recovery rate of iron height, energy resource consumption is low, automaticity is high, productivity ratio is high, slab quality is good become one of important technology that has epoch-making property on the steel and iron industry developing history.The exploitation of continuous casting steel machine technology is that iron and steel is produced another the great technological revolution afterwards of relaying oxygen coverter with using, and is the most active branch of present field of metallurgy, also is one of technology with fastest developing speed in the field of steel-making.Continuous casting technology has produced huge motive force to the world steel industrial expansion.At present, the fast development of continuous casting production has become promotion steel-making and the flourish major technique power of whole iron and steel production.
In the continuous casting steel machine process, tundish is the container that holds molten steel that connects between steel ladle and the crystallizer, has decompression, shunting, removes functions such as field trash and storage molten steel, helps to realize sequence casting.Usually, tundish mainly is made up of tundish housing and refractory lining, and wherein, the tundish housing is for being repeatedly used parts; Refractory lining is made up of refractory materials such as working lining, stopper, the mouth of a river, coating.After one of every cast is watered time, the refractory lining of tundish will be changed once, so the refractory consumption of continuous casting working procedure mainly is to change refractory lining.
In the continuous casting steel machine process, the refractory lining consumption of tundish mainly is to cause because of slag lining erosion and the erosion of submersed nozzle in crystallizer protecting residue in the tundish.Fig. 1 shows the continuous casting submersed nozzle of tundish and the schematic cross sectional views of crystallizer according to prior art.With reference to Fig. 1, for submersed nozzle, in the continuous casting steel machine process, submersed nozzle 2 is inserted in molten steel 6 and the covering slag (3,4 and 5), and wherein, covering slag comprises original layers 3, sinter layer 4 and liquid slag layer 5.The erosion at the mouth of a river mainly occurs in the liquid slag layer position of covering slag, and the thickness of the length that submersed nozzle 2 is etched and the liquid slag layer of covering slag 5 is suitable, causes the refractory lining needs of whole tundish to be made again after the mouth of a river at liquid slag layer position is etched.
In recent years, be to reduce the cost of anti-material of conticaster, general adopt improved anti-material amount, improves single basket pouring stove number, improves the tundish covering flux physical and chemical index, improved measures such as crystallizer protecting residue physical and chemical index and prolong anti-material service life as far as possible more; Yet, make that like this production cost is higher.
Summary of the invention
In order to solve the aforementioned problems in the prior, the invention provides a kind of by changing the method that crystallizer slag line attack sites prolongs the service life of continuous casting submersed nozzle.
According to an aspect of the present invention; a kind of continuous casting submersed nozzle method in service life that prolongs is provided; described method comprises: determine that submersed nozzle is etched predetermined degree at the liquid slag layer position of covering slag; adjust the height of tundish then downwards; make the liquid slag layer position position contacting of submersed nozzle and covering slag change, thereby prolong the service life of continuous casting submersed nozzle.
According to the present invention, determine that submersed nozzle is etched predetermined degree at the liquid slag layer position of covering slag step can comprise: determine submersed nozzle be positioned at thickness that liquid slag layer partly locates be submersed nozzle integral thickness 2/3.
According to the present invention; the step of adjusting downwards the height of tundish can comprise: the part that the liquid slag layer position of the protected slag of submersed nozzle is corroded is inserted into downwards in the molten steel, makes the part that is not etched of submersed nozzle contact with the liquid slag layer position of covering slag.
According to the present invention, can determine the height of the tundish adjusted according to the thickness of the liquid slag layer of covering slag downwards.
According to the present invention, the height of the tundish of adjusting can be 10mm-15mm downwards.
According to the present invention; adjust the insertion depth of submersed nozzle in crystallizer by the height of in casting process, adjusting tundish; to change the erosion that the submersed nozzle different parts receives the covering slag liquid slag layer; thereby improved the service life of submersed nozzle, and reduced the continuous casting cost of anti-the material.
Description of drawings
To those skilled in the art, describe example embodiment in detail by the reference accompanying drawing and will make feature become clear, wherein:
Fig. 1 shows the continuous casting submersed nozzle of tundish and the schematic cross sectional views of crystallizer according to prior art;
Fig. 2 shows the submersed nozzle according to the present invention schematic diagram that slag line corrodes in crystallizer;
Fig. 3 show submersed nozzle according to the present invention after changing slag line in crystallizer the schematic diagram of erosion condition.
The specific embodiment
Now, will with reference to accompanying drawing example embodiment be described more fully hereinafter; Yet example embodiment can be implemented with different forms, and should not be construed as and be limited to here the embodiment that sets forth.On the contrary, provide these embodiment, it will be complete in completely making the disclosure, and the scope of example embodiment is fully conveyed to those skilled in the art.
In the continuous casting steel machine production process; submersed nozzle is inserted in (as shown in Figure 1) in the crystallizer; the liquid slag layer of covering slag is wrapped in around the submersed nozzle always; chemical reaction ceaselessly takes place with the anti-material in the mouth of a river; thereby corrode the anti-material in the mouth of a river; after mouth of a river depth of erosion acquires a certain degree, problem such as will rupture in the mouth of a river, perforation and can not continue to use, single basket pouring stove number is subjected to bigger restriction.
The invention provides a kind of improved immersion water gap for continuously casting, to prolong mouth of a river service time, improves single in bag pouring furnace number, and the reduction continuous casting cost of anti-the material.
Describe in detail below with reference to accompanying drawings according to immersion water gap for continuously casting of the present invention.
Fig. 2 shows the submersed nozzle according to the present invention schematic diagram that slag line corrodes in crystallizer.Fig. 3 show submersed nozzle according to the present invention after changing slag line in crystallizer the schematic diagram of erosion condition.
According to the present invention, after submersed nozzle 102 used a period of time, the liquid slag layer of its protected slag corroded certain degree, as shown in Figure 2.Specifically, in the continuous casting steel machine process, submersed nozzle 102 is inserted in molten steel 106 and comprises in the covering slag of original layers 103, sinter layer 104 and liquid slag layer 105.Submersed nozzle 102 can be protected the erosion of the liquid slag layer 105 of slag, thereby at liquid slag layer 105 contacted parts generations as shown in Figure 2 the recess 107 of submersed nozzle 102 with covering slag.Though not shown, because of the periphery that contact with the liquid slag layer generation round submersed nozzle 102 of the recess 107 that corrode to produce.In other words, the length (that is the degree of depth of recess 107) that is etched of submersed nozzle 102 is corresponding to the thickness of the liquid slag layer 5 of covering slag.
With reference to Fig. 3; after the mouth of a river at liquid slag layer position is etched to a certain degree; in time adjust the oil cylinder height of tundish, thereby change the insertion depth of submersed nozzle 102 in crystallizer by adjusting the tundish height, contact with the covering slag liquid slag layer with position, the different mouth of a river of conversion.
Specifically; detect submersed nozzle 102 and whether be etched predetermined degree at the liquid slag layer position of covering slag; specifically, the thickness that is positioned at the liquid slag layer position (that is the degree of depth of recess 107) that detects submersed nozzle 102 whether reached the mouth of a river 10 integral thickness 2/3.If determine that the mouth of a river 102 has been etched its thickness of 1/3; then adjust the height of tundish downwards; thereby change submersed nozzle at the position of crystallizer liquid slag layer; namely; the former erosion of submersed nozzle 102 is inserted molten steel than the position, deep; former not attack sites enters covering slag liquid slag layer position, as shown in Figure 3.
According to one embodiment of present invention, the height of the tundish of adjusting can be determined according to covering slag liquid slag layer thickness downwards, is preferably 10mm-15mm.
According to one embodiment of present invention, can regularly detect the erosion degree of submersed nozzle 102.For example, the molten steel liquid level in the crystallizer can be reduced, judge that by naked eyes the part that submersed nozzle 102 is etched exposes, and then definite submersed nozzle 102 is etched, adjust tundish then downwards, so that submersed nozzle 102 continues to use.In addition, according to molten steel in mold flow field needs, the depth bounds that submersed nozzle inserts the crystallizer molten steel is generally 80mm-170mm, so this scope adjusting range of slag line just.
Therefore; according to the present invention; by changing submersed nozzle in the position of crystallizer protecting residue liquid slag layer (generally can change 3 times-4 times); can prolong the service life of submersed nozzle; improve the continuous pouring stove number of single middle bag; reduce the cost of anti-material of casting machine, and can improve recovery rate of iron, to the significance of having increased economic efficiency.
In addition; in the prior art; be to reduce the conticaster cost of anti-the material, general adopt improve anti-material amount, improve single in bag pouring furnace number, improve in the covering agent physical and chemical index, improve measures such as crystallizer protecting residue physical and chemical index and prolong anti-material service life as far as possible.Different with it, according to the present invention, by change the position that the mouth of a river is corroded by the crystallizer slag line in cast, can prolong the service life of submersed nozzle significantly, the advantage that therefore, that the present invention has is simple and practical, need not manufacturing cost.
Although with reference to above-described embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, still can make amendment or be equal to replacement the present invention, and not breaking away from any modification or partial replacement of the spirit and scope of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (5)
1. one kind prolongs the continuous casting submersed nozzle method in service life; it is characterized in that described method comprises: determine that submersed nozzle is etched predetermined degree at the liquid slag layer position of covering slag; adjust the height of tundish then downwards; make the liquid slag layer position position contacting of submersed nozzle and covering slag change, thereby prolong the service life of continuous casting submersed nozzle.
2. method according to claim 1 is characterized in that determining that submersed nozzle is etched predetermined degree at the liquid slag layer position of covering slag step comprises: determine submersed nozzle be positioned at thickness that liquid slag layer partly locates be submersed nozzle integral thickness 2/3.
3. method according to claim 1; the step that it is characterized in that adjusting the height of tundish downwards comprises: the part that the liquid slag layer position of the protected slag of submersed nozzle is corroded is inserted into downwards in the molten steel, makes the part that is not etched of submersed nozzle contact with the liquid slag layer position of covering slag.
4. method according to claim 1 is characterized in that determining according to the thickness of the liquid slag layer of covering slag the height of the tundish adjusted downwards.
5. method according to claim 4 is characterized in that the height of the tundish of adjustment is 10mm-15mm downwards.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013102578257A CN103341622A (en) | 2013-06-26 | 2013-06-26 | Method for prolonging service life of continuous casting immersion type water opening |
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| CN2013102578257A CN103341622A (en) | 2013-06-26 | 2013-06-26 | Method for prolonging service life of continuous casting immersion type water opening |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104084551A (en) * | 2014-07-30 | 2014-10-08 | 攀钢集团攀枝花钢钒有限公司 | Method for controlling continuous casting tundish submersed nozzle |
| CN107321949A (en) * | 2017-06-26 | 2017-11-07 | 日照宝华新材料有限公司 | Thin-slab caster becomes slag line method |
| CN112059164A (en) * | 2020-08-13 | 2020-12-11 | 邢台钢铁有限责任公司 | Tundish submerged nozzle use method capable of prolonging service life |
| CN112296324A (en) * | 2020-10-12 | 2021-02-02 | 山东泰山钢铁集团有限公司 | Method for prolonging service life of 400-series stainless steel continuous casting submerged nozzle |
| CN113199020A (en) * | 2021-05-19 | 2021-08-03 | 东北大学 | Method for controlling slag line erosion of submerged nozzle by using external electric field |
| CN113418623A (en) * | 2021-05-17 | 2021-09-21 | 天津钢铁集团有限公司 | Non-contact type temperature measuring device for slag line part of lower nozzle and slag line adjusting method |
Citations (5)
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| US3743007A (en) * | 1970-10-21 | 1973-07-03 | Schloemann Ag | Continuous casting apparatus with inter-changeable pouring tubes |
| JPS61172660A (en) * | 1985-01-24 | 1986-08-04 | Kawasaki Heavy Ind Ltd | Method for exchanging nozzle of continuous casting installation |
| CN101229576A (en) * | 2007-01-25 | 2008-07-30 | 鞍钢股份有限公司 | Slag line control method of continuous casting crystallizer |
| CN101229577A (en) * | 2008-02-04 | 2008-07-30 | 广州珠江钢铁有限责任公司 | Submerged nozzle control method of bar strip continuous casting |
| CN202910292U (en) * | 2012-10-16 | 2013-05-01 | 中冶南方工程技术有限公司 | Slab continuous casting immersion nozzle with long service life |
-
2013
- 2013-06-26 CN CN2013102578257A patent/CN103341622A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3743007A (en) * | 1970-10-21 | 1973-07-03 | Schloemann Ag | Continuous casting apparatus with inter-changeable pouring tubes |
| JPS61172660A (en) * | 1985-01-24 | 1986-08-04 | Kawasaki Heavy Ind Ltd | Method for exchanging nozzle of continuous casting installation |
| CN101229576A (en) * | 2007-01-25 | 2008-07-30 | 鞍钢股份有限公司 | Slag line control method of continuous casting crystallizer |
| CN101229577A (en) * | 2008-02-04 | 2008-07-30 | 广州珠江钢铁有限责任公司 | Submerged nozzle control method of bar strip continuous casting |
| CN202910292U (en) * | 2012-10-16 | 2013-05-01 | 中冶南方工程技术有限公司 | Slab continuous casting immersion nozzle with long service life |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104084551A (en) * | 2014-07-30 | 2014-10-08 | 攀钢集团攀枝花钢钒有限公司 | Method for controlling continuous casting tundish submersed nozzle |
| CN107321949A (en) * | 2017-06-26 | 2017-11-07 | 日照宝华新材料有限公司 | Thin-slab caster becomes slag line method |
| CN112059164A (en) * | 2020-08-13 | 2020-12-11 | 邢台钢铁有限责任公司 | Tundish submerged nozzle use method capable of prolonging service life |
| CN112059164B (en) * | 2020-08-13 | 2022-05-24 | 邢台钢铁有限责任公司 | Tundish submerged nozzle use method capable of prolonging service life |
| CN112296324A (en) * | 2020-10-12 | 2021-02-02 | 山东泰山钢铁集团有限公司 | Method for prolonging service life of 400-series stainless steel continuous casting submerged nozzle |
| CN113418623A (en) * | 2021-05-17 | 2021-09-21 | 天津钢铁集团有限公司 | Non-contact type temperature measuring device for slag line part of lower nozzle and slag line adjusting method |
| CN113199020A (en) * | 2021-05-19 | 2021-08-03 | 东北大学 | Method for controlling slag line erosion of submerged nozzle by using external electric field |
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Application publication date: 20131009 |