CN104725079B - A kind of method for forming smooth compacted zone on carbon containing refractory surface - Google Patents
A kind of method for forming smooth compacted zone on carbon containing refractory surface Download PDFInfo
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- CN104725079B CN104725079B CN201510109724.4A CN201510109724A CN104725079B CN 104725079 B CN104725079 B CN 104725079B CN 201510109724 A CN201510109724 A CN 201510109724A CN 104725079 B CN104725079 B CN 104725079B
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- China
- Prior art keywords
- carbon containing
- refractory
- containing refractory
- compacted zone
- carbon
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 18
- 229910052751 metal Inorganic materials 0.000 claims abstract description 22
- 239000002184 metal Substances 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 239000011819 refractory material Substances 0.000 claims abstract description 11
- RQMIWLMVTCKXAQ-UHFFFAOYSA-N [AlH3].[C] Chemical compound [AlH3].[C] RQMIWLMVTCKXAQ-UHFFFAOYSA-N 0.000 claims abstract description 7
- 230000005684 electric field Effects 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000004381 surface treatment Methods 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 12
- 239000010959 steel Substances 0.000 description 12
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 6
- 239000010410 layer Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000000137 annealing Methods 0.000 description 3
- 239000003963 antioxidant agent Substances 0.000 description 3
- 230000003078 antioxidant effect Effects 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000000395 magnesium oxide Substances 0.000 description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 3
- 239000011241 protective layer Substances 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- RWDBMHZWXLUGIB-UHFFFAOYSA-N [C].[Mg] Chemical compound [C].[Mg] RWDBMHZWXLUGIB-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000003064 anti-oxidating effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention discloses a kind of method for forming smooth compacted zone on carbon containing refractory surface, belong to refractory surface treatment technology.The method includes：It is negative pole with the carbon containing refractory with metal liquid directly contact, is positive pole with the aluminum-carbon refractory material rod inserted in metal liquid, applying pulse current density is 0.000001 10.0Acm‑2, pulse frequency is the low-density pulse current of 100 6000Hz, so as to form smooth compacted zone on carbon containing refractory and the surface of metal liquid directly contact.The method have the characteristics that：It is simple to operation, motlten metal will not be polluted.
Description
Technical field
The present invention relates to refractory surface treatment technology, and in particular to one kind forms smooth on carbon containing refractory surface
The method of compacted zone.
Background technology
Carbon containing refractory has excellent corrosion resistance, resistance to heat shocks and high-temperature stability in high temperature environments, because
This is widely applied in metallurgical industry.Such as in steel smelting procedure, steel ladle working layer, stopper, the Chang Shui for being used
The material that the parts such as mouth, submersed nozzle have more than 90% is constituted by carbon containing refractory, in nonferrous smelting field, is contained
Carbon refractory is more to be used as zinc, the working lining of aluminium.
However, because the primary raw material in carbon containing refractory is graphite or carbon black, this kind of raw material is in 500-800 DEG C of high temperature
It is easily oxidized in environment so as to cause to damage to component.Therefore, in order to improve the inoxidizability of carbon containing refractory, typically
The method of use is to add antioxidant during related components are prepared, and one layer is formed in refractory material matrix and surface
The protective oxide film being made up of antioxidant, makes antioxidant be aoxidized before graphite or carbon black oxidation.It is another
The method for preventing carbon containing refractory from aoxidizing is to coat one layer of inoxidzable coating on fire-proof material member surface, main at present to use
The anti-oxidation material of muddy or molten state is covered in refractory surface by the method for spraying or dipping.The reality of these methods
The inoxidizability that improve carbon containing refractory is applied, its service life is effectively extended, the anti-of carbon containing refractory can be made substantially
Oxidation susceptibility reaches target.
But, the working lining with the carbon containing refractory of the metal bath directly contact such as molten steel, due to the washing away of molten metal,
The corrosion functions such as dissolving, the oxide layer for being formed in refractory surface in advance is etched and reduces the inoxidizability of refractory material
Can, so as to reduce the service life of refractory material.
Therefore, when carbon containing refractory is contacted as container with motlten metal, if the nonmetal inclusion in metal can be made
Thing is migrated to refractory surface and forms dense protective layer, and the inoxidizability and erosion resisting for improving refractory material have weight
Want meaning.
The content of the invention
The present invention is made in motlten metal using the pulsed current annealing method applied in the molten metal under low current density
Oxide be mingled with and migrate to carbon containing refractory working lining, smooth compacted zone is formed on its surface, so as to not only reduce molten steel
Middle oxide is mingled with, and improves molten steel degree of purity, and be covered in carbon containing refractory surface and form smooth compacted zone, Jin Erneng
Enough effectively improve the inoxidizability and corrosion resistance of carbon containing refractory working lining.
A kind of method that protection treatment is carried out with the surface of metal liquid directly contact to carbon containing refractory, the method
Including：Using the mode of extra electric field, i.e., it is negative pole with the carbon containing refractory working lining with metal liquid directly contact, to insert
Enter the aluminum-carbon refractory material rod in metal liquid for positive pole, apply the electricity with certain pulse current density and pulse frequency
, its surface is generated smooth compacted zone.
Exemplary embodiment of the invention, the pulse current density is：0.000001-10.0A·cm-2, pulse
Frequency is：100-6000Hz.
The advantage of the invention is that：
(1) carbon containing refractory is carried out using the pulsed current annealing method under applying low current density in the molten metal
Surface treatment so that the oxide in metal liquid is mingled with and is effectively driven and be fixed on carbon containing refractory surface, has
Improve to effect the service life of carbon containing refractory.
(2) in the presence of electric field, the oxide in metal liquid is mingled with and is fixed on after carbon oxide surface, effectively
Improve the degree of purity of metal liquid (such as molten steel), and then improve the quality of metallic article.
(3) equipment involved in the present invention is extremely simple, easily implements and with low cost, with significant economic benefit.
Specific embodiment
The present invention makes refractory oxide in motlten metal (such as aluminum oxide, magnesia using the method for pulsed current annealing
Deng), migrate to carbon containing refractory surface and form smooth compacted zone, reach preferable purpose.Mechanism of the invention is profit
It is mingled with the difference with molten liquid steel resistivity with refractory oxide, in the presence of low current density pulse current, oxide
It is mingled with and is pushed to refractory surface and uniform deposition forms smooth dense protective layer.
Embodiment 1
The present invention is implemented on 60t ladles first.During ladle standing, with the magnesium carbonaceous fire proofed wood of steel ladle
Material working lining is negative pole, and the aluminum-carbon refractory material rod in being inserted into molten steel from ladle upper center is positive pole, applies pulse
Current density is 0.01Acm-2, pulse frequency is the low-density pulse current of 2000Hz, and average voltage is 0.2V.Ladle makes
After with end cycle, the magnesia carbon refractory as negative pole and molten steel directly contact surface formed with aluminum oxide (>
90%) for the thickness of main component is the smooth compacted zone of 2-3mm, prolong the service life of the magnesium carbon refractory brick of steel ladle working layer
20% is grown, average life extends to 36 times from 30 times.
Embodiment 2
The present invention is applied on the aluminum-carbon refractory material submersed nozzle below 20t tundish, with mouth of a river outer surface
Aluminum-carbon refractory material be negative pole, to be inserted into the aluminum-carbon refractory material rod in the molten steel of mouth of a river center as positive pole, apply
Pulse current density is 0.1Acm-2, pulse frequency is the low-density pulse current of 4000Hz, by after continuous use, in aluminium
It is the smooth compacted zone of 4-8mm that the inner surface of carbide refractory forms alumina content more than 90%, thickness, makes immersion
The service life at the mouth of a river extends 35%.Average life extends to 7.83 stoves from 5.80 heats.
Present invention employs low current density positive negative impulse current, current strength is low, the induced field or heat of formation
It is uneven minimum, when the refractory oxide (such as aluminum oxide, magnesia) in molten metal bath is migrated in the presence of electric field
It is deposited thereon after to carbon containing refractory surface, forms fine and close protective layer, without is further continued for new migration.
Claims (1)
1. a kind of method for forming smooth compacted zone on carbon containing refractory surface, it is characterised in that methods described includes：With with
The carbon containing refractory of metal liquid directly contact is negative pole, with the aluminum-carbon refractory material rod that is inserted into metal liquid as just
Pole, applies the electric field with predetermined pulse current density and predetermined pulse frequency, so as to carbon containing refractory and molten metal
The surface of body directly contact forms smooth compacted zone, and the predetermined pulse current density is 0.000001-10.0Acm-2, it is described
Predetermined pulse frequency is 100-6000Hz.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510109724.4A CN104725079B (en) | 2015-03-12 | 2015-03-12 | A kind of method for forming smooth compacted zone on carbon containing refractory surface |
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| CN201510109724.4A CN104725079B (en) | 2015-03-12 | 2015-03-12 | A kind of method for forming smooth compacted zone on carbon containing refractory surface |
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| CN104725079B true CN104725079B (en) | 2017-06-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107954748B (en) * | 2015-12-30 | 2020-01-14 | 苏州大学 | Slag-corrosion-resistant refractory material |
| CN105779692A (en) * | 2016-03-11 | 2016-07-20 | 东北大学 | Method for controlling size and number of inclusions in molten metal |
| CN106380229B (en) * | 2016-08-27 | 2017-11-28 | 武汉科技大学 | A kind of method and device for improving magnesia carbon refractory resistance to slag corrosion |
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| DE3930866C1 (en) * | 1989-09-15 | 1991-02-28 | Didier-Werke Ag, 6200 Wiesbaden, De | |
| JP2002284588A (en) * | 2001-03-28 | 2002-10-03 | Ngk Insulators Ltd | CARBON FIBER REINFORCED SiC COMPOSITE MATERIAL HAVING OXIDATION RESISTANCE AND ITS MANUFACTURING METHOD |
| CN100415942C (en) * | 2006-01-12 | 2008-09-03 | 上海大学 | Production of nanometer crystal zinc plating |
| CN103436655A (en) * | 2013-05-23 | 2013-12-11 | 沈阳东大高温材料有限公司 | Method for removing and refining inclusion and bubble from molten metal |
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