CN1220650C - Integral stopper rod comprising Al-C-Cr material - Google Patents
Integral stopper rod comprising Al-C-Cr material Download PDFInfo
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- CN1220650C CN1220650C CN 02135496 CN02135496A CN1220650C CN 1220650 C CN1220650 C CN 1220650C CN 02135496 CN02135496 CN 02135496 CN 02135496 A CN02135496 A CN 02135496A CN 1220650 C CN1220650 C CN 1220650C
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Abstract
The present invention relates to an integral stopper rod containing aluminum, carbon and chromium, which belongs to the technical field of fireproof materials. The integral stopper uses alumina and carbon as main components, and is characterized in that aluminium chromium residue of which the weight ratio is from 5% to 25% is added to a rod head; the aluminium chromium residue is the congruent melting material of alumina and chromium oxide produced in the producing process of metal chromium, wherein the content of Al2O3+Cr2O3 of the whole stopper rod is above 90%, discard materials of carbon fire-resisting materials are added to stopper rod raw materials to save cost, resist the erosion wash of molten metal and thermal stability and extend service life.
Description
Technical field
The invention belongs to fire resisting material field, relate in particular to a kind of integral stopper rod comprising Al-C-Cr material.
Background technology
Aluminum-carbon refractory material is with Al
2O
3+ C is the refractory materials of main component, because its oxidation-resistance obviously is better than magnesia carbon brick, anti-Na
2O is that the erosion performance of slag is good, is used widely in iron and steel casts continuously with functional refractory.As be used for molten metal is injected the thrust-augmenting nozzle of tundish from reusable or intermittently used ladle, be used for that molten metal is packaged into the submerged nozzle of crystallizer from the centre and be used to control the stopper etc. of flow of molten metal.Immersion water gap for continuously casting not only will have good heat-shock resistance when watering steel, can resist the big effect of the temperature shock and the temperature difference, and requires anti-molten steel scouring ability strong, ability molten steel and slag corrosion.
Integral stopper rod is in metallurgy industry, particularly in the iron and steel continuous casting, be widely used, aluminium carbon integrated filler rod will stand the thermal shocking of the molten metal about 1500 ℃ in use and wash away erosion, in order to improve the stability of stopper caput, adopt added zirconic method more, zirconium white has the fusing point height, thermal structure intensity is big, chemical stability is good, thermal conductivity is little, can satisfy the technical requirements of pyrotic smelting metal, but other impurities in raw materials content has a significant impact zirconic stability, must adopt highly purified raw material, make cost increase greatly.
Aluminium chromium slag is that chromium metal produces the aluminium chromium eutectic that the chromic oxide that is not reduced and aluminum oxide form in process of production, the performance that itself has refractory materials, in the preparation high-temperature refractory, be widely used, as aluminium chromium firebrick, refractory Mg-Al-Cr material etc.August 15 calendar year 2001, the Chinese patent ZL 98114186.2 of bulletin provided a kind of refractory Mg-Al-Cr material and preparation method thereof, it utilizes with chromium slag and magnesia is the main material production low cost, the refractory materials that resistance to elevated temperatures is high, but this refractory materials is high temperature resistant cataclysm poor-performing, the not erosion of molten-metal-resistant, occur longitudinal crack easily, influence the quality of metal product.
The barred body of integral stopper rod is a non-working surface, and under the prerequisite that does not influence the stopper serviceability, the raw material that each producer all adopts with lower performance reduces production costs, and is aggregate as adopting sintered bauxite, perhaps replaces white fused alumina or the like with brown corundum.But production cost is still higher.
Summary of the invention
The purpose of this invention is to provide a kind of integral stopper rod comprising Al-C-Cr material, relate in particular to a kind of aluminium carbon integrated filler rod that is added with aluminium chromium slag.
The invention provides a kind of integral stopper rod comprising Al-C-Cr material, mainly constitute by caput and barred body two portions, with aluminum oxide and charcoal element is main ingredient, be added with weight proportion in the caput and be 5～25% aluminium chromium slag, this aluminium chromium slag is aluminum oxide and chromic oxide eutectic, the wherein Al that produces in the chromium metal production process
2O
3+ Cr
2O
3Content be higher than 90%.Aluminium chromium slag will stand 2200 ℃ high temperature in the production technique of chromium metal, it itself is exactly a kind of refractory materials of excellent property, introduce the chromic oxide composition in the aluminum-carbon refractory material, can improve the material molten-metal-resistant and wash away and erosion performance, the volume density of material is increased.
It is characterized in that: the weight of the caput batching of (1) this integral stopper rod comprising Al-C-Cr material consists of:
Fused white corundum 25～35% zirconium mullites 5～15%
Aluminium chromium slag 5～25% alpha-aluminium oxide powders 5～15%
Graphite 15～25% industrial silicons 1.0～5.0%
Silicon carbide 1.0～5.0% solid phenolic resins 2.0～6.0%
Liquid phenolic resin 5～15%
Wherein the part of fused white corundum is added as aggregate, can be by fineness 80 orders, 100 orders and 1: 1: 1 batching of three kinds of ratio of components more than 180 orders; Graphite selects for use fixed carbon content greater than 98% graphite; Zirconium mullite is selected 0.59～0.21 μ m and 0.21～0 μ m for use, and the weight ratio of these two kinds of granularities is 1: 1; The granularity of aluminium chromium slag also is controlled at below the 0.21 μ m, and the granularity that alpha-aluminium oxide powder is selected for use is 5 μ m.Pure Silicon Metal and silicon carbide army require more than 180 orders.
(2) barred body of this integral stopper rod comprising Al-C-Cr material is a non-working surface, and purity that the barred body batching requires and quality are a little less than caput, and the weight of barred body is composed as follows:
Palm fibre corundum 15～25% graphite 10～20%
Reclaimed materials 25～35% industrial silicons 1.0～5.0%
Silicon carbide 1.0～5.0% alumines 25～35%
Liquid phenolic resin 5～15%
Reclaimed materials in the barred body can be the dead meal that steel mill uses back or untapped aluminum-carbon refractory material, and this dead meal also is a kind of refractory materials of excellent property through the high temperature contact of molten metal; Contain the work-ing life that a spot of silicon-dioxide can improve stopper in the integral stopper rod caput, if but too high levels can make the anti-erosion performance of flushing of stopper reduce, and the present invention introduces a spot of silicon-dioxide by adding zirconium mullite.
This integral stopper rod comprising Al-C-Cr material can adopt following method preparation:
Respectively stopper caput raw material and solid phenolic resin liquid phenolic resin are mixed, stopper barred body raw material and liquid phenolic resin mix, earlier in the barred body raw material injection model, reinject barred body and caput compound a little, inject the caput raw material at last, moulding in the isostatic pressing machine, forming pressure is 150Mpa, kept 5～15 minutes, goods after the moulding after drying, fired under 1300 ℃ 60～70 hours, the work in-process after burning till are after the mechanical cutting shaping, and its outside surface sprays the inoxidzable coating of 0.2mm.
Beneficial effect of the present invention is the caput utilization interpolation aluminium chromium slag of integral stopper rod, makes the stopper caput form C-Al
2O
3-SiO
2-Cr
2O
3The series refractory material composition has not only been saved raw material but also has improved the water eroding and flooding performance and the thermal stability of integral stopper rod molten-metal-resistant; Barred body adopts high aluminium material and reclaimed materials to replace fused corundom, has reduced production cost.
Embodiment
1 one kinds of integral stopper rod comprising Al-C-Cr materials of embodiment, in caput, add 15% aluminium chromium slag, caput adopts following proportioning raw materials: fused white corundum 50Kg, zirconium mullite 20Kg, aluminium chromium slag 30Kg, alpha-aluminium oxide powder 10Kg, graphite 40Kg, industrial silicon 10Kg, silicon carbide 10Kg, solid phenolic resin 10Kg, liquid phenolic resin 20Kg;
Barred body adopts following proportioning raw materials: brown corundum 30Kg, graphite 40Kg, reclaimed materials 50Kg, industrial silicon 2Kg, silicon carbide 2Kg, alumine 56Kg, liquid phenolic resin 20Kg;
Earlier with each raw material pulverizing to required granularity, wherein the above weight proportion of fused white corundum 80 purposes, 100 orders and 180 orders is: 1: 1: 1, it was 98% graphite that graphite is selected fixed carbon content for use; Zirconium mullite is selected 0.59～0.21 μ m and 0.21～0 μ m for use, and the weight ratio of these two kinds of granularities is 1: 1; The granularity of aluminium chromium slag is 0.21 μ m, and the granularity that alpha-aluminium oxide powder is selected for use is 5 μ m.The divided by maximum granularity of Pure Silicon Metal and silicon carbide is 180 orders.
Isostatic pressing technology is adopted in the integral stopper rod moulding, and raw materials cost has reduced about 35% than original aluminium carbon integrated filler rod, on average can prolong 3～5 hours duration of service continuously.
2 one kinds of integral stopper rod comprising Al-C-Cr materials of embodiment, in caput, add 5% aluminium chromium slag, caput adopts following proportioning raw materials: fused white corundum 60Kg, zirconium mullite 10Kg, aluminium chromium slag 10Kg, alpha-aluminium oxide powder 20Kg, graphite 50Kg, industrial silicon 10Kg, silicon carbide 6Kg, solid phenolic resin 4Kg, liquid phenolic resin 30Kg;
Barred body adopts following proportioning raw materials: brown corundum 30Kg, graphite 20Kg, reclaimed materials 70Kg, industrial silicon 10Kg, silicon carbide 10Kg, alumine 50Kg, liquid phenolic resin 10Kg;
It is 99% graphite that graphite is selected fixed carbon content for use; All the other are with embodiment 1.
3 one kinds of integral stopper rod comprising Al-C-Cr materials of embodiment, in caput, add 5% aluminium chromium slag, caput adopts following proportioning raw materials: fused white corundum 70Kg, zirconium mullite 30Kg, aluminium chromium slag 10Kg, alpha-aluminium oxide powder 30Kg, graphite 30Kg, industrial silicon 2Kg, silicon carbide 2Kg, solid phenolic resin 12Kg, liquid phenolic resin 14Kg;
Barred body adopts following proportioning raw materials: brown corundum 50Kg, graphite 20Kg, reclaimed materials 50Kg, industrial silicon 2Kg, silicon carbide 10Kg, alumine 50Kg, liquid phenolic resin 18Kg;
It is 99.5% graphite that graphite is selected fixed carbon content for use; All the other are with embodiment 1.
4 one kinds of integral stopper rod comprising Al-C-Cr materials of embodiment, in caput, add 5% aluminium chromium slag, caput adopts following proportioning raw materials: fused white corundum 50Kg, zirconium mullite 26Kg, aluminium chromium slag 50Kg, alpha-aluminium oxide powder 10Kg, graphite 30Kg, industrial silicon 2Kg, silicon carbide 10Kg, solid phenolic resin 12Kg, liquid phenolic resin 10Kg;
Barred body adopts following proportioning raw materials: brown corundum 30Kg, graphite 28Kg, reclaimed materials 50Kg, industrial silicon 2Kg, silicon carbide 10Kg, alumine 50Kg, liquid phenolic resin 30Kg;
It is 98% graphite that graphite is selected fixed carbon content for use; All the other are with embodiment 1.
Claims (1)
1, a kind of integral stopper rod comprising Al-C-Cr material mainly is made of caput and barred body two portions, it is characterized in that:
(1) weight of caput batching consists of:
Fused white corundum 25～35% zirconium mullites 5～15%
Aluminium chromium slag 5～25% alpha-aluminium oxide powders 5～15%
Graphite 15～25% industrial silicons 1.0～5.0%
Silicon carbide 1.0～5.0% solid phenolic resins 2.0～6.0%
Liquid phenolic resin 5～15%;
The weight proportion that described fused white corundum fineness 80 orders, 100 orders and 180 orders are above three kinds is 1: 1: 1;
Described zirconium mullite is selected 0.59～0.21 μ m and 0.21～0 μ m for use, and the weight ratio of these two kinds of granularities is 1: 1;
Described aluminium chromium slag is aluminum oxide and chromic oxide eutectic, the wherein Al that produces in the chromium metal production process
2O
3+ Cr
2O
3Content be higher than 90%; The granularity of aluminium chromium slag also is controlled at below the 0.21 μ m;
The granularity that described alpha-aluminium oxide powder is selected for use is 5 μ m;
Described graphite is fixed carbon content greater than 98% graphite;
Described industrial silicon and silicon carbide all require more than 180 orders;
(2) weight of barred body batching consists of:
Palm fibre corundum 15～25% graphite 10～20%
Reclaimed materials 25～35% industrial silicons 1.0～5.0%
Silicon carbide 1.0～5.0% alumines 25～35%
Liquid phenolic resin 5～15%;
Described reclaimed materials is the dead meal of steel mill's use or original aluminum-carbon refractory material;
Described graphite is that fixed carbon content is at the graphite more than 98%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02135496 CN1220650C (en) | 2002-09-26 | 2002-09-26 | Integral stopper rod comprising Al-C-Cr material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02135496 CN1220650C (en) | 2002-09-26 | 2002-09-26 | Integral stopper rod comprising Al-C-Cr material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1485294A CN1485294A (en) | 2004-03-31 |
| CN1220650C true CN1220650C (en) | 2005-09-28 |
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ID=34146175
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02135496 Expired - Lifetime CN1220650C (en) | 2002-09-26 | 2002-09-26 | Integral stopper rod comprising Al-C-Cr material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103817318A (en) * | 2014-02-24 | 2014-05-28 | 江苏泰瑞耐火有限公司 | Stopper body applied to continuous casting of high-manganese and high-oxygen steel |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101712558B (en) * | 2009-05-25 | 2012-07-25 | 上海宝明耐火材料有限公司 | Stopper rod head and immersion water gap bowl material for continuous casting |
| CN104001883A (en) * | 2014-04-30 | 2014-08-27 | 江苏泰瑞耐火有限公司 | Submersed nozzle for washing resistance of continuous-casting high manganese and high oxygen steel |
| CN104692815A (en) * | 2015-02-05 | 2015-06-10 | 西安建筑科技大学 | Continuous casting thermal shock-resistant monoblock stopper added with recycled materials, and preparation method thereof |
| CN107298586A (en) * | 2017-07-04 | 2017-10-27 | 洛阳理工学院 | A kind of pipe line steel continuous casting anti-erosion stopper rod of tundish |
| CN107721447A (en) * | 2017-11-29 | 2018-02-23 | 鲁山县方圆工程技术有限公司 | Ferronickel electric furnace chromium-aluminium spinel brick fuel and preparation method thereof |
-
2002
- 2002-09-26 CN CN 02135496 patent/CN1220650C/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103817318A (en) * | 2014-02-24 | 2014-05-28 | 江苏泰瑞耐火有限公司 | Stopper body applied to continuous casting of high-manganese and high-oxygen steel |
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| Publication number | Publication date |
|---|---|
| CN1485294A (en) | 2004-03-31 |
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Owner name: SHANDONG ZICHUAN SPECIAL FIREPROOF MATERIALS CO., Free format text: FORMER NAME: SHANDONG ZIBO SPECIAL FIRE-RESISTANT MATERIALS FTY |
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| CP01 | Change in the name or title of a patent holder |
Address after: 255188, Hongqi Town, Zibo Town, Zichuan District, Shandong Patentee after: SHANDONG ZICHUAN SPECIAL REFRACTORY MATERIAL Co.,Ltd. Address before: 255188, Hongqi Town, Zibo Town, Zichuan District, Shandong Patentee before: Shandong Zibo Special Fire-Resistant Materials Fty |
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Granted publication date: 20050928 |
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