CN101429040B - Composite baking-free stopper rod of magnesium aluminate spinel and production process thereof - Google Patents
Composite baking-free stopper rod of magnesium aluminate spinel and production process thereof Download PDFInfo
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- CN101429040B CN101429040B CN2008101603689A CN200810160368A CN101429040B CN 101429040 B CN101429040 B CN 101429040B CN 2008101603689 A CN2008101603689 A CN 2008101603689A CN 200810160368 A CN200810160368 A CN 200810160368A CN 101429040 B CN101429040 B CN 101429040B
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Abstract
The invention relates to a magnesium-aluminum spinel composite baking-free plug bar. A plug bar head comprises the following raw materials: 15 to 25 percent of No. 18-36 magnesium-aluminum spinel, 20 to 30 percent of No. 70-120 magnesium-aluminum spinel, 30 to 35 percent of No. 325 magnesium-aluminum spinel, 8 to 12 percent of graphite powder, 1.5 to 3.5 percent of antioxidant, 2 to 4 percent of phenolic resin, and 3 to 7 percent of baking-free agent. A plug bar body comprises the following raw materials: 35 to 50 percent of No. 18-120 alpha-corundum aggregate, 25 to 35 percent of alpha-corundum aggregate, 20 to 30 percent of graphite powder, 1 to 3 percent of alumina powder, 1 to 5 percent of baking-free agent, and 3 to 5 percent of phenolic resin. The magnesium-aluminum spinel compositebaking-free plug bar is formed by addition of the baking-free agent with special compositions, forming and low-temperature roasting. The product has the characteristics of strong slag erosion resistance, good thermal shock stability, high strength, erosion resistance, scour prevention, fire resistance, long service life, low production cost and so on, saves energy resources, and can meet the multi-furnace continuous casting performance requirement and the product quality requirement.
Description
Technical field
The invention belongs to metallurgical articles for use, a kind of specifically stopper that in continuous casting of iron and steel is produced, uses.
Background technology
Integral stopper rod is as one of three-major-items of continuous casting of iron and steel, and its effect is the flow of control molten steel from the tundish to the mold, to guarantee molten steel the stablizing of liquid level stabilizing and continuous casting process in mold.At present, they be not a lot of with the research of stopper refractory materials abroad, and domestic relevant continuous casting of iron and steel is many with the product technology of stopper for continuous casting of iron and steel, and with regard to stopper material and service performance, conclusion gets up to mainly contain following type:
1, is main raw material with high-grade fused corundom, crystalline flake graphite, adds inhibitor and special additive and process aluminium carbonaceous stopper that the caput material is with Al
2O
3-C is main, is applicable to cast aluminum killed steel.
2, be main raw material with high-grade electrosmelted magnesite clinker, crystalline flake graphite, the caput material is main with MgO-C, is applicable to the casting calcium treated steel.
3, be combined into integral stopper rod with aluminium carbon, magnesium carbon, head carries out compound with magnesium carbon material and excellent body alumina-carbon material, be applicable to calcium treated steel.
4, use high purity graphite and aluminium sesquioxide to be main raw material, add additive, wedding agent, adopt the isostatic pressing machine moulding, bury the charcoal sintering and form, be applicable to cast aluminum killed steel.
Above-mentioned stopper material is nothing more than by Al
2O
3, three kinds of basic raw materials of MgO and graphite form.
5, be combined into stopper with zirconium white and graphite, this ZrO
2The stopper of-C material is applicable to that generally casting is various just, but because the zirconium white price is very expensive, generally seldom uses.
With regard to the production technique of stopper refractory materials, mostly its production technique of the stopper of above-mentioned material be isostatic pressing, bury the charcoal sintering forms, and not only expends the energy and contaminate environment.
Summary of the invention
Technical problem to be solved by this invention provides a kind of composite baking-free stopper rod of magnesium aluminate spinel and production technique; Product is under the prerequisite that satisfies the requirement of continuous casting performance requriements and quality product; Product performance are much improved, and reduce production costs, the energy-saving production technology environmental protection.
Composite baking-free stopper rod of magnesium aluminate spinel of the present invention is characterized in that:
The weight proportion of its caput constitutive material is:
18-36# magnesium-aluminium spinel 15-25%, 70-120# magnesium-aluminium spinel 20-30%, 325# magnesium-aluminium spinel 30-35%, Graphite Powder 99 8-12%, oxidation inhibitor 1.5-3.5%, liquid phenolic resin 2-4% with unburned dose 3-7%;
The weight proportion of its barred body constitutive material is:
18-120# α-corundum aggregate 35-50%, α-lapis amiridis 25-35%, Graphite Powder 99 20-30%, aluminum oxide powder 1-3%, unburned dose 1-5% and resol 3-5%.
Unburned dose weight in the constitutive material of caput and barred body consists of, and is 100% in unburned dose of raw material total amount: aluminum oxide powder 30～40%, norbide 10～15%, solid phenolic resin 5～10% and metallic silicon power 45～55%.
Oxidation inhibitor in the caput constitutive material preferably adopts silit or metallic silicon power.
Aluminum oxide powder generally adopts the 325# aluminum oxide powder.
Produce the technology of above-mentioned composite baking-free stopper rod of magnesium aluminate spinel; Be that with barred body, caput mixes respectively with tablets press after preparing by proportioning raw materials; Drying reaches certain fugitive constituent (this fugitive constituent refers to the volatile quantity under 250 ℃) 1.1-1.4wt%; Suppress composite molding with cold isostatic press through 115MPa-135MPa,, generally toasted 16～20 hours after form by room temperature to 200 a ℃ low-temperature bake.
The production technique of composite baking-free stopper rod of magnesium aluminate spinel of the present invention is because of adding unburned dose, at high-pressure molding after 200 ℃ of low-temperature bakes get final product.The same prior art of other technological operation step.Wherein the compound material of the adapter section of caput and barred body is respectively to get the equivalent weight mixing with the qualified pug of caput and barred body to form.
Advantage of the present invention:
The present invention is main raw material, especially caput raw material with the magnesium-aluminium spinel, on production technique, magnesium-aluminium spinel and corundum is combined with each other, and adds unburned dose of special composition, forms through low-temperature bake after the moulding.It is strong that product has anti-slag etch ability, good thermal shock stability, and performance characteristics such as intensity height, anti-etch, antiscour, high temperature resistant (fusing point can reach 2135 ℃), long service life, and save energy reduce discharge of harmful gases, improve workman's operating environment.Production cost is low, and is cost-saved 14% compared with similar products, can be applicable to aluminium killed steel, Si killed steel, also can be applicable to the casting of steel grades such as calcium treated steel, can satisfy many stoves continuous casting performance requriements and quality product requirement simultaneously.
The key technical indexes of composite baking-free stopper rod of magnesium aluminate spinel is:
Caput barred body unit
Withstand voltage >=22.5 >=10 Mpa
Anti-folding >=6.0 >=5.0 Mpa
Volume density>=2.6>=2.5 g/cm
3
Hot shock resistance >=5 >=5 time (1100 ℃～water-cooled)
Apparent porosity≤18≤15 %
Embodiment
Below in conjunction with embodiment the present invention is described, but does not limit the present invention.Percentage ratio among the embodiment specifies, all refers to weight percentage.
Embodiment 1:
The weight proportion of caput constitutive material is:
18# (referring to granularity requirements) magnesium-aluminium spinel 22%, 100# magnesium-aluminium spinel 26%, 325# magnesium-aluminium spinel 32%, Graphite Powder 99 10%, oxidation inhibitor (silit) 3%, liquid phenolic resin 4% with unburned dose 3%;
The weight proportion of barred body constitutive material is:
100# α-corundum aggregate 40%, α-lapis amiridis (325#) 30%, Graphite Powder 99 25%, aluminum oxide powder 1%, unburned dose 1% and liquid phenolic resin 3%.
Wherein unburned dose weight consists of, and is 100% in unburned dose of raw material total amount: aluminum oxide powder 35%, norbide 15%, solid-like resol 5% and metallic silicon power 45%.
According to production technique production of the present invention.
Embodiment 2:
The weight proportion of caput constitutive material is:
36# (referring to granularity requirements) magnesium-aluminium spinel 15%, 70# magnesium-aluminium spinel 30%, 325# magnesium-aluminium spinel 35%, Graphite Powder 99 8%, oxidation inhibitor (silit) 2.5%, liquid phenolic resin 2.5% with unburned dose 7%;
The weight proportion of barred body constitutive material is:
18# α-corundum aggregate 44%, α-lapis amiridis (325#) 25%, Graphite Powder 99 20%, aluminum oxide powder 3%, unburned dose 3% and liquid phenolic resin 5%.
Wherein unburned dose weight consists of, and is 100% in unburned dose of raw material total amount: aluminum oxide powder 40%, norbide 10%, solid-like resol 5% and metallic silicon power 45%.
According to production technique production of the present invention.
Embodiment 3:
The weight proportion of caput constitutive material is:
22# (referring to granularity requirements) magnesium-aluminium spinel 25%, 120# magnesium-aluminium spinel 20%, 325# magnesium-aluminium spinel 30%, Graphite Powder 99 12%, oxidation inhibitor (metallic silicon power) 3%, liquid phenolic resin 4% with unburned dose 67%;
The weight proportion of barred body constitutive material is:
60# α-corundum aggregate 50%, α-lapis amiridis (325#) 25%, Graphite Powder 99 20%, aluminum oxide powder 1%, unburned dose 1% and liquid phenolic resin 3%.
Wherein unburned dose weight consists of, and is 100% in unburned dose of raw material total amount: aluminum oxide powder 30%, norbide 10%, solid-like resol 10% and metallic silicon power 50%.
According to production technique production of the present invention.
The basic mechanical design feature of the composite baking-free stopper rod of magnesium aluminate spinel that embodiment 1～3 obtains and see the following form with the technical feature of similar products at home and abroad (be meant Zhongqi Refract Co., Ltd., Shandong in the Qingdao together, Japanese Kurosaki is meant Japanese Kurosaki Co., Ltd.):
Can find out that by last table contrast product of the present invention has all reached domestic and international top standard.
Claims (3)
1. composite baking-free stopper rod of magnesium aluminate spinel is characterized in that:
The weight proportion of its caput constitutive material is:
18-36# magnesium-aluminium spinel 15-25%, 70-120# magnesium-aluminium spinel 20-30%, 325# magnesium-aluminium spinel 30-35%, Graphite Powder 99 8-12%, oxidation inhibitor 1.5-3.5%, liquid phenolic resin 2-4% and unburned dose of 3-7%;
The weight proportion of its barred body constitutive material is:
18-120# α-corundum aggregate 35-50%, α-lapis amiridis 25-35%, Graphite Powder 99 20-30%, aluminum oxide powder 1-3%, unburned dose of 1-5% and liquid phenolic resin 3-5%;
Unburned dose weight in the constitutive material of caput and barred body consists of, and is 100% in unburned dose of raw material total amount: aluminum oxide powder 30～40%, norbide 10～15%, solid phenolic resin 5～10% and metallic silicon power 45～55%.
2. composite baking-free stopper rod of magnesium aluminate spinel according to claim 1 is characterized in that the oxidation inhibitor in the caput constitutive material is silit or metallic silicon power.
3. technology of producing the said composite baking-free stopper rod of magnesium aluminate spinel of claim 1; After it is characterized in that preparing by proportioning raw materials; With barred body, caput mixes respectively with tablets press, and drying reaches certain fugitive constituent 1.1-1.4wt%; Suppress composite molding with cold isostatic press through 115MPa-135MPa, after form by room temperature to 200 a ℃ low-temperature bake.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101603689A CN101429040B (en) | 2008-11-12 | 2008-11-12 | Composite baking-free stopper rod of magnesium aluminate spinel and production process thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101603689A CN101429040B (en) | 2008-11-12 | 2008-11-12 | Composite baking-free stopper rod of magnesium aluminate spinel and production process thereof |
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| Publication Number | Publication Date |
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| CN101429040A CN101429040A (en) | 2009-05-13 |
| CN101429040B true CN101429040B (en) | 2012-06-27 |
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| CN2008101603689A Expired - Fee Related CN101429040B (en) | 2008-11-12 | 2008-11-12 | Composite baking-free stopper rod of magnesium aluminate spinel and production process thereof |
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Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101722302B (en) * | 2009-12-24 | 2011-06-15 | 中钢集团洛阳耐火材料研究院有限公司 | Preparation method of magnesium-carbon composite monolithic stopper rod for continuous casting |
| CN101927340A (en) * | 2010-05-17 | 2010-12-29 | 王世泰 | Aluminium (zirconium)-carbon long nozzle, submerged entry nozzle and monolithic stopper refractory products for continuous casting |
| CN102049512B (en) * | 2011-01-18 | 2013-05-15 | 北京利尔高温材料股份有限公司 | Production method of burning-free continuous casting integral composite rod |
| CN102039403A (en) * | 2011-01-18 | 2011-05-04 | 北京利尔高温材料股份有限公司 | Method for manufacturing spinel composite monoblock stopper for continuous casting of low-carbon free-cutting steel |
| CN102896309B (en) * | 2011-07-29 | 2015-01-21 | 宝山钢铁股份有限公司 | Monolithic stopper used for continuous casting, and preparation method thereof |
| CN102838360B (en) * | 2012-09-12 | 2014-12-24 | 首钢总公司 | Composite fireproof material and preparation method thereof |
| CN103008638B (en) * | 2012-12-18 | 2015-08-05 | 北京利尔高温材料股份有限公司 | A kind of composite monolithic stopper rod and preparation method thereof |
| CN106938936B (en) * | 2017-03-24 | 2019-06-28 | 河南省西保冶材集团有限公司 | A kind of integrated stopper rod used for continuous casting and its production technology |
| CN108947550B (en) * | 2018-08-21 | 2021-07-16 | 山东东耐高温材料股份有限公司 | Bottom pouring furnace plug rod and preparation method thereof |
| CN110950672A (en) * | 2019-11-25 | 2020-04-03 | 中钢集团洛阳耐火材料研究院有限公司 | Titanium-containing nitride in-situ composite low-carbon spinel carbon refractory material and preparation method thereof |
| CN112094116B (en) * | 2020-09-25 | 2022-09-02 | 广东韶钢松山股份有限公司 | Stopper rod for producing free-cutting steel and preparation method thereof |
| CN115028455B (en) * | 2022-07-11 | 2023-06-02 | 中钢集团洛阳耐火材料研究院有限公司 | Baking-free silicon carbide-magnesia alumina spinel refractory material, preparation method and product thereof |
| CN114988898B (en) * | 2022-07-15 | 2023-06-20 | 中钢集团洛阳耐火材料研究院有限公司 | Preparation method of silicon carbide-magnesia-alumina spinel baking-free refractory material |
| CN117430413B (en) * | 2023-12-20 | 2024-03-12 | 山西昊业新材料开发有限公司 | Stopper rod for continuous casting and preparation method thereof |
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| CN1446651A (en) * | 2002-03-22 | 2003-10-08 | 淄博北工新特耐火材料有限公司 | Compound integral column of sagger |
| CN101050104A (en) * | 2007-04-30 | 2007-10-10 | 山东中齐耐火材料有限公司 | Formula of caput of composition type stopper |
| CN101134238A (en) * | 2006-08-31 | 2008-03-05 | 宝山钢铁股份有限公司 | Low carbon magnesium integral composite stopper rod |
-
2008
- 2008-11-12 CN CN2008101603689A patent/CN101429040B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1446651A (en) * | 2002-03-22 | 2003-10-08 | 淄博北工新特耐火材料有限公司 | Compound integral column of sagger |
| CN101134238A (en) * | 2006-08-31 | 2008-03-05 | 宝山钢铁股份有限公司 | Low carbon magnesium integral composite stopper rod |
| CN101050104A (en) * | 2007-04-30 | 2007-10-10 | 山东中齐耐火材料有限公司 | Formula of caput of composition type stopper |
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Granted publication date: 20120627 Termination date: 20131112 |