CN103008638A - Composite integral stopper and manufacture method thereof - Google Patents
Composite integral stopper and manufacture method thereof Download PDFInfo
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- CN103008638A CN103008638A CN2012105538276A CN201210553827A CN103008638A CN 103008638 A CN103008638 A CN 103008638A CN 2012105538276 A CN2012105538276 A CN 2012105538276A CN 201210553827 A CN201210553827 A CN 201210553827A CN 103008638 A CN103008638 A CN 103008638A
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- carbon material
- spinelle
- stopper rod
- composite monolithic
- monolithic stopper
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Abstract
The invention relates to the field of a refractory material with a continuous casting function, and particularly discloses a composite integral stopper and a manufacture method thereof. The composite integral stopper comprises a stopper head (1), a transition section (2) and a stopper body (3), wherein the stopper head (1) is made of a magnesium carbon material, the stopper body (3) is made of an aluminum carbon material, the transition section (2) between the stopper head (1) and the stopper body (3) is made of a spinel carbon material, and the spinel carbon material contains spinels, graphite, additives and bonds. The composite integral stopper provided by the invention has the advantage that the phenomenon that the stopper head is broken due to the volume expansion caused by the generation of spinels when the traditional transition material reacts in the use process is avoided.
Description
Technical field
The present invention relates to Novel continuous casting functional refractory field, relate in particular to a kind of composite monolithic stopper rod and preparation method thereof.
Background technology
The integral column of sagger that is used for continuous casting process is comprised of excellent body and caput usually, in continuous casting process, integral column of sagger is applied in the tundish, its major function is by adjusting the fit clearance of Integral stopper head and monoblock type submersed nozzle or tundish upper nozzle bowl section, the molten steel of controlling tundish open water, close and crystallizer in steel stream, thereby guarantee stable and continuous casting process stable of molten steel liquid level in crystallizer.The service condition of stopper is very harsh, should bear the coal gas of high temperature baking, water strong thermal shock and the violent scour at steel initial stage, stands again the erosion of molten steel and coverture.
Integral column of sagger rod stature material is mainly aluminium carbon material at present, integral column of sagger will stand thermal shock in use, and integral column of sagger must have certain thermal-shock resistance, the problems such as broken end, rod point be disconnected can not occur, otherwise will cause the interruption of continuous casting, cause larger economic loss to steel mill.The stopper head is subjected to the molten steel erosion serious in the use procedure in addition, and the quality of its anti-erosion, scour resistance is the key factor that determines its service life.For improving the service life of stopper, according to the difference of watering steel grade, caput can adopt Al
2O
3-C matter, MgO-C material.
Along with the development of China's continuous casting cause, variety steel is more and more, and caput adopts the more and more of magnesium carbon material.Magnesium carbon stopper of the prior art generally is that caput adopts magnesium carbon material, the rod body adopts aluminium carbon material, between adding length is the Transition Materials (pug that magnesium carbon pug and aluminium carbon pug mix by a certain percentage) about 20～50mm, because the difference of thermal expansion between magnesium carbon and the aluminium carbon material, cause that stopper in use easily turns around, rod point is disconnected, prolongation along with casting time, the Transition Materials generation spinelle that in long-time baking and use procedure, also can react, produce larger volumetric expansion, thereby cause the caput fracture.
Summary of the invention
The technical problem that (one) will solve
The object of the present invention is to provide a kind of thermal dilation difference that can alleviate between caput and the excellent body, can also avoid simultaneously the conventional transition material in use to generate spinelle owing to reacting and produce volumetric expansion, finally cause composite monolithic stopper rod of caput phenomenon of rupture and preparation method thereof.
(2) technical scheme
In order to solve the problems of the technologies described above, the invention provides a kind of composite monolithic stopper rod, comprise caput, changeover portion and excellent body, wherein, caput adopts magnesium carbon material, the rod body adopts aluminium carbon material, and the changeover portion between caput and the excellent body adopts spinelle carbon material, and described spinelle carbon material contains spinelle, graphite, additive and bond.
Wherein, described spinelle carbon material is grouped into by the one-tenth of following weight portion: 70～85 parts in spinelle; 10～25 parts in graphite; 2～5 parts of additives; 10～15 parts of bonds.
Further, described additive is one or both in metallic silicon power, the carborundum powder; Described bond is phenolic resins.
Further again, described phenolic resins is thermosetting phenolic resin, and its carbon residue amount is more than or equal to 35%, and solid content is more than or equal to 65%, and the viscosity of temperature in the time of 25 ℃ is 600～1000cps.
Wherein, the chemical composition of described spinelle is: Al
2O
3And MgO, wherein, Al
2O
3Mass percent be that the mass percent of 70～80%, MgO is 20～30%.
Wherein, in the described graphite mass percent of carbon more than or equal to 90%.
Wherein, the changeover portion height of described spinelle carbon material is 20～50mm.
The present invention also provides the preparation method of described composite monolithic stopper rod, and the manufacturing process of this stopper is as follows:
Spinelle, graphite, additive and bond are mixed, after granulation, drying, make the spinelle carbon material that changeover portion adopts;
The spinelle carbon material of making, the magnesium carbon material of caput employing and the aluminium carbon material that excellent body adopts are put on the relevant position of composite monolithic stopper rod mould, behind isostatic compaction, under temperature is 900～1100 ℃ and nonoxidizing atmosphere, calcine, obtain composite monolithic stopper rod;
Then process the profile of described composite monolithic stopper rod according to preset standard, and the spraying inoxidzable coating, required composite monolithic stopper rod obtained.
(3) beneficial effect
Composite monolithic stopper rod provided by the invention, changeover portion between stopper caput and excellent body adopts the spinelle material with carbon element, make it to be complementary with the thermal expansion of the aluminium carbon material of the magnesium carbon material of caput, excellent body, so not only can alleviate the thermal dilation difference between caput and the excellent body, can also avoid conventional transition material (pug that magnesium carbon pug and aluminium carbon pug mix by a certain percentage) in use to generate spinelle owing to reacting and produce volumetric expansion, finally cause the phenomenon of caput fracture.
Description of drawings
Fig. 1 is the structural representation of composite monolithic stopper rod of the present invention.
Among the figure, 1: caput; 2: changeover portion; 3: excellent body.
The specific embodiment
Be described in further detail below in conjunction with the specific embodiment of accompanying drawing to composite monolithic stopper rod provided by the invention.These embodiments only are used for explanation the present invention, and are not limitation of the present invention.
Composite monolithic stopper rod provided by the invention comprises caput 1, changeover portion 2 and excellent body 3, wherein caput 1 adopts magnesium carbon material, rod body 3 adopts aluminium carbon material, changeover portion 2 between caput 1 and the excellent body 3 adopts spinelle carbon material, and described spinelle carbon material contains spinelle, graphite, additive and bond.Because the thermal expansion of the aluminium carbon material of the spinelle carbon material that described changeover portion 2 adopts and the magnesium carbon material of caput 1, excellent body 3 is complementary, and therefore finally can avoid the phenomenon of in use caput 1 fracture of composite monolithic stopper rod.
Described spinelle carbon material is grouped into by the one-tenth of following weight portion: 70～85 parts in spinelle; 10～25 parts in graphite; 2～5 parts of additives; 10～15 parts of bonds.
The chemical composition of described spinelle is: Al
2O
3And MgO, wherein, Al
2O
3Mass percent be that the mass percent of 70～80%, MgO is 20～30%; Described additive is one or both in metallic silicon power, the carborundum powder; Described bond is phenolic resins, and described phenolic resins is preferably thermosetting phenolic resin, and its carbon residue amount is more than or equal to 35%, and solid content is more than or equal to 65%, and the viscosity of temperature in the time of 25 ℃ is 600～1000cps.The mass percent of carbon is more than or equal to 90% in the described graphite.
The manufacture method of composite monolithic stopper rod provided by the invention is: spinelle, graphite, additive and bond are mixed, after granulation, drying, make the spinelle carbon material that changeover portion 2 adopts, the spinelle carbon material of making, the magnesium carbon material of caput 1 employing and the aluminium carbon material that excellent body 3 adopts are put on the relevant position of composite monolithic stopper rod mould, behind isostatic compaction, under temperature is 900～1100 ℃ and nonoxidizing atmosphere, calcine, obtain composite monolithic stopper rod; Then process the profile of described composite monolithic stopper rod according to preset standard, and the spraying inoxidzable coating, required composite monolithic stopper rod obtained.
Embodiment one
Consisting of of the spinelle carbon material that changeover portion 2 adopts: spinelle 73g, graphite 25g, metallic silicon power 2g, phenolic resins 15g.By the above-mentioned example of joining spinelle, graphite, metallic silicon power and phenolic resins are mixed, after granulation, drying, make the spinelle carbon material that changeover portion 2 adopts, the spinelle carbon material of making, the magnesium carbon material of caput 1 employing and the aluminium carbon material that excellent body 3 adopts are put on the relevant position of composite monolithic stopper rod mould, it is that the changeover portion height is 20mm for 20mm(highly that spinelle carbon material adds), behind isostatic compaction, under temperature is 900 ℃ and nonoxidizing atmosphere, calcine, obtain composite monolithic stopper rod; Then process the profile of described composite monolithic stopper rod according to preset standard, and the spraying inoxidzable coating, the required composite monolithic stopper rod such as get and use 25 stoves in certain steel mill, used 16 hours, in use, the phenomenons such as caput 1 fracture do not occur.
Embodiment two
Consisting of of the spinelle carbon material that changeover portion 2 adopts: spinelle 78g, graphite 17g, metallic silicon power 3g, carborundum powder 2g, phenolic resins 13g.Press said ratio with spinelle, graphite, metallic silicon power, carborundum powder and phenolic resins mix, through granulation, make the spinelle carbon material that changeover portion 2 adopts after the drying, with the spinelle carbon material of making, the aluminium carbon material that the magnesium carbon material that caput 1 adopts and excellent body 3 adopt is put on the relevant position of composite monolithic stopper rod mould, it is that the changeover portion height is 30mm for 30mm(highly that spinelle carbon material adds), behind isostatic compaction, under being 1100 ℃ and nonoxidizing atmosphere, temperature calcines, obtain composite monolithic stopper rod, then process the profile of described composite monolithic stopper rod according to preset standard, and spraying inoxidzable coating, obtain required composite monolithic stopper rod and use 12 stoves in certain steel mill, used 12 hours, in use, the phenomenons such as caput 1 fracture do not appear.
Embodiment three
Consisting of of the spinelle carbon material that changeover portion 2 adopts: spinelle 80g, graphite 18g, carborundum powder 2g, phenolic resins 14g.Press said ratio with spinelle, graphite, carborundum powder and phenolic resins mix, through granulation, make the spinelle carbon material that changeover portion 2 adopts after the drying, with the spinelle carbon material of making, the aluminium carbon material that the magnesium carbon material that caput 1 adopts and excellent body 3 adopt is put on the relevant position of composite monolithic stopper rod mould, it is that the changeover portion height is 40mm for 40mm(highly that spinelle carbon material adds), behind isostatic compaction, under being 1000 ℃ and nonoxidizing atmosphere, temperature calcines, obtain composite monolithic stopper rod, then process the profile of described composite monolithic stopper rod according to preset standard, and spraying inoxidzable coating, obtain required composite monolithic stopper rod and use 40 stoves in certain steel mill, used 22 hours, in use, the phenomenons such as caput 1 fracture do not appear.
Embodiment four
Consisting of of the spinelle carbon material that changeover portion 2 adopts: spinelle 85g, graphite 10g, metallic silicon power 2g, carborundum powder 3g, phenolic resins 10g.Press said ratio with spinelle, graphite, metallic silicon power, carborundum powder and phenolic resins mix, through granulation, make the spinelle carbon material that changeover portion 2 adopts after the drying, with the spinelle carbon material of making, the aluminium carbon material that the magnesium carbon material that caput 1 adopts and excellent body 3 adopt is put on the relevant position of composite monolithic stopper rod mould, it is that the changeover portion height is 40mm for 40mm(highly that spinelle carbon material adds), behind isostatic compaction, under being 900 ℃ and nonoxidizing atmosphere, temperature calcines, obtain composite monolithic stopper rod, then process the profile of described composite monolithic stopper rod according to preset standard, and spraying inoxidzable coating, obtain required composite monolithic stopper rod and use 91 stoves in certain steel mill, used 39 hours, in use, the phenomenons such as caput 1 fracture do not appear.
Embodiment five
Consisting of of the spinelle carbon material that changeover portion 2 adopts: spinelle 70g, graphite 25g, metallic silicon power 2g, carborundum powder 3g, phenolic resins 15g.By above-mentioned join the example with spinelle, graphite, metallic silicon power, carborundum powder and phenolic resins mix, through granulation, make the spinelle carbon material that changeover portion 2 adopts after the drying, with the spinelle carbon material of making, the aluminium carbon material that the magnesium carbon material that caput 1 adopts and excellent body 3 adopt is put on the relevant position of composite monolithic stopper rod mould, it is that the changeover portion height is 50mm for 50mm(highly that spinelle carbon material adds), behind isostatic compaction, under being 1050 ℃ and nonoxidizing atmosphere, temperature calcines, obtain composite monolithic stopper rod, then process the profile of described composite monolithic stopper rod according to preset standard, and spraying inoxidzable coating, obtain required composite monolithic stopper rod and use 25 stoves in certain steel mill, used 16 hours, in use, the phenomenons such as caput 1 fracture do not appear.
The above only is preferred embodiment of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the technology of the present invention principle; can also make some improvement and replacement, these improvement and replacement also should be considered as protection scope of the present invention.
Claims (8)
1. composite monolithic stopper rod, comprise caput (1), changeover portion (2) and excellent body (3), caput (1) adopts magnesium carbon material, rod body (3) adopts aluminium carbon material, it is characterized in that, changeover portion (2) between caput (1) and the excellent body (3) adopts spinelle carbon material, and described spinelle carbon material contains spinelle, graphite, additive and bond.
2. composite monolithic stopper rod according to claim 1 is characterized in that, described spinelle carbon material is grouped into by the one-tenth of following weight portion: 70～85 parts in spinelle; 10～25 parts in graphite; 2～5 parts of additives; 10～15 parts of bonds.
3. composite monolithic stopper rod according to claim 2 is characterized in that, described additive is one or both in metallic silicon power, the carborundum powder; Described bond is phenolic resins.
4. composite monolithic stopper rod according to claim 3 is characterized in that, described phenolic resins is thermosetting phenolic resin, and its carbon residue amount is more than or equal to 35%, and solid content is more than or equal to 65%, and the viscosity of temperature in the time of 25 ℃ is 600～1000cps.
5. composite monolithic stopper rod according to claim 1 is characterized in that, the chemical composition of described spinelle is: Al
2O
3And MgO, wherein, Al
2O
3Mass percent be that the mass percent of 70～80%, MgO is 20～30%.
6. composite monolithic stopper rod according to claim 1 is characterized in that, the mass percent of carbon is more than or equal to 90% in the described graphite.
7. the described composite monolithic stopper rod of any one is characterized in that according to claim 1-6, and the changeover portion (2) of described spinelle carbon material highly is 20～50mm.
8. the preparation method of the described composite monolithic stopper rod of claim 1-7 any one is characterized in that, the manufacturing process of this stopper is as follows:
Spinelle, graphite, additive and bond are mixed, after granulation, drying, make the spinelle carbon material that changeover portion (2) adopts;
The spinelle carbon material of making, the magnesium carbon material of caput (1) employing and the aluminium carbon material that excellent body (3) adopts are put on the relevant position of composite monolithic stopper rod mould, behind isostatic compaction, under temperature is 900～1100 ℃ and nonoxidizing atmosphere, calcine, obtain composite monolithic stopper rod;
Then process the profile of described composite monolithic stopper rod according to preset standard, and the spraying inoxidzable coating, required composite monolithic stopper rod obtained.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210553827.6A CN103008638B (en) | 2012-12-18 | 2012-12-18 | A kind of composite monolithic stopper rod and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210553827.6A CN103008638B (en) | 2012-12-18 | 2012-12-18 | A kind of composite monolithic stopper rod and preparation method thereof |
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| CN103008638A true CN103008638A (en) | 2013-04-03 |
| CN103008638B CN103008638B (en) | 2015-08-05 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105418094A (en) * | 2015-12-01 | 2016-03-23 | 浙江铁狮高温材料有限公司 | Long-life monoblock stopper made from spinel materials |
| CN109773172A (en) * | 2019-03-16 | 2019-05-21 | 赵芬 | New device for high-temperature molten metal continuous temperature measurement and control steel stream size |
| CN110981505A (en) * | 2019-11-05 | 2020-04-10 | 泰州市旺鑫耐火材料有限公司 | Stopper rod head and preparation method thereof |
| CN112792960A (en) * | 2021-02-01 | 2021-05-14 | 北京利尔高温材料股份有限公司 | Novel low-cost high-efficiency integral stopper rod head die |
| CN116715530A (en) * | 2023-06-02 | 2023-09-08 | 中钢集团洛阳耐火材料研究院有限公司 | Preparation method of spinel carbon material with low thermal expansion rate |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105418094A (en) * | 2015-12-01 | 2016-03-23 | 浙江铁狮高温材料有限公司 | Long-life monoblock stopper made from spinel materials |
| CN109773172A (en) * | 2019-03-16 | 2019-05-21 | 赵芬 | New device for high-temperature molten metal continuous temperature measurement and control steel stream size |
| CN110981505A (en) * | 2019-11-05 | 2020-04-10 | 泰州市旺鑫耐火材料有限公司 | Stopper rod head and preparation method thereof |
| CN112792960A (en) * | 2021-02-01 | 2021-05-14 | 北京利尔高温材料股份有限公司 | Novel low-cost high-efficiency integral stopper rod head die |
| CN116715530A (en) * | 2023-06-02 | 2023-09-08 | 中钢集团洛阳耐火材料研究院有限公司 | Preparation method of spinel carbon material with low thermal expansion rate |
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