CN101028724A - Intermediate air-curtain brick and its production - Google Patents
Intermediate air-curtain brick and its production Download PDFInfo
- Publication number
- CN101028724A CN101028724A CN 200610107255 CN200610107255A CN101028724A CN 101028724 A CN101028724 A CN 101028724A CN 200610107255 CN200610107255 CN 200610107255 CN 200610107255 A CN200610107255 A CN 200610107255A CN 101028724 A CN101028724 A CN 101028724A
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- CN
- China
- Prior art keywords
- brick
- curtain
- air
- magnesia
- tundish
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Compositions Of Oxide Ceramics (AREA)
Abstract
A gas curtain brick is a magnesium type air permeable refractor for the pouring ladle. It is proportionally prepared from electrosmelting magnesite, adhesive, pore-forming agent and Cr2O3 through mixing, stirring, 630-ton friction pressing, baking and calcining at 1550-1700 deg.C.
Description
Technical field
The present invention relates to refractory material, be specially and relate to a kind of magnesia tundish air curtain barricade wall brick and preparation method thereof.
Background technology
By being installed in air curtain barricade wall brick Argon in molten steel of tundish bottom, form air curtain, thereby change molten steel flow field in the tundish, impel inclusion floating, effectively remove the non-metallic inclusion in the molten steel, molecule and reduction [O] content plays clean effect to molten steel.
At present, the air brick that metallurgy industry generally uses mainly is installed in ladle bottom, stirs molten steel, the effect that molten steel is mixed by blowing argon gas.This series products material is mainly Al
2O
3-Cr
2O
3, Al
2O
3-SiO
2System.The practice with studies show that the Al in the air brick
2O
3Can cause the obstruction at the tundish slide plate and the intrusive mood mouth of a river, and molten steel is polluted.Along with the development of metallurgy industry, more and more stricter to the requirement of steel quality.MgO not with molten steel in element and deoxidation thing react, can ensure the molten steel cleaning, magnesia tundish air curtain barricade wall brick is best beyond doubt first-selected aspect molten steel clean.
Summary of the invention
The invention provides a kind of have good thermal shock resistance, corrosion resistance, pollution-free, have tundish air-curtain brick catharsis, novel and preparation method thereof molten steel.
Production technology of the present invention is: hundred-percent by weight magnesia, additive 0.5～2%, bond 4～8% mix, and after stirring, adopt 630 tons of friction press compression mouldings, after drying, burn till at 1550～1700 ℃.Wherein, described bond is boric acid, MgCl
2The aqueous solution, additive Cr
2O
3, pore creating material is a volatile substances.
Described raw material magnesia MgO 〉=95.5%, the particle proportioning of raw material are 96 electric smelting sand, 2～0.15mm, magnesite clinker≤0.074mm.
It is main material that the present invention adopts magnesia, Cr
2O
3Be additive, form and the adjustment grain composition that the magnesia tundish air-curtain brick of manufacturing has good thermal shock resistance, corrosion resistance, anti-molten steel scouring, and is pollution-free to molten steel by feed proportioning optimization.Wherein, pore creating material is introduced in the raw material, and volatilization can make the product internal rows become the diffusion-type pore, improves the gas permeability of product.Additive Cr
2O
3Introduce in this product, can improve thermal shock resistance, the corrosion resistance of product.
Description of drawings
Accompanying drawing 1 is the structural representation of tundish air-curtain brick, wherein: 1 ventilative joint, 2 air chambers, 3 non-ventilating areas, 4 ventilating areas.
Accompanying drawing 2 is scheme of installations of tundish air-curtain brick, wherein: 1 steel ladle, 2. big bag long nozzle, 3. barricade, 4. stopper, 5. tundish upper nozzle, 6. air-curtain brick, 7. tundish
The specific embodiment
The production method of the magnesia tundish air-curtain brick of embodiment is: the hundred-percent magnesia of its composition weight, additive 0.5～2%, bond 4～8% mix, after stirring, adopt 630 tons of friction press compression mouldings, after drying, burn till at 1550～1700 ℃ of high temperature.Physical and chemical index: bulk density is 110 ℃ * 24h 〉=2.85g/cm
3, 1700 ℃ * 3h 2.8g/cm
3, compressive resistance is 110 ℃ * 24h 〉=45MPa, 1700 ℃ * 3h 〉=65MPa, the porosity is 110 ℃ * 24h 20%, 1700 ℃ * 3h 25%.In the use, can cooperate weir and dam in tundish to use.
Concrete using method
1. the result who goes out according to water mould test simulation proportionally determines the installation site of barricade (weir) and air-curtain brick.(installation situation as shown in drawings)
2. must press close to permanent layer when barricade, air-curtain brick are installed and install, air-curtain brick exposes working lining must not be greater than 5mm.
3. earlier according to the drawing requirement, reserve the barricade position when barricade is installed, make barricade can press close to permanent layer and install, treat barricade be placed on behind the assigned address materials with near the crack barricade fill out connect closely knit.
4. barricade installs, and air-curtain brick is installed to assigned address, and installation method and barricade are similar.
5. must dry earlier after installing, toast again.
6. air-curtain brick omnidistance Argon in the use of tundish, Argon pressure is suitably adjusted Argon pressure according to pulling rate and scum silica frost situation, and supply gas pressure is controlled at 0.2～2MPa.
The present invention surveys physical and chemical index
Bulk density is 110 ℃ * 24h 〉=2.85g/cm
3, 1700 ℃ * 3h 2.8g/cm
3, compressive resistance is 110 ℃ * 24h 〉=45MPa, 1700 ℃ * 24h 〉=65MPa, the porosity is 110 ℃ * 24h 20%, 1700 ℃ * 3h 25%.
Claims (4)
1, a kind of production method of magnesia tundish air-curtain brick, it is characterized in that hundred-percent by weight magnesia, additive 0.5～2%, bond 4～8% mix, after stirring, with the compression moulding of 630T friction press, after drying, burn till at 1550～1700 ℃ of following high temperature.
2, in the production method according to right 1 described tundish air curtain barricade wall brick, bond is boric acid, MgCl
2The aqueous solution.
3, be 96 electric smelting sand, 2～0.5mm according to right 1 described feed particles grating, 0.5～0.15mm, magnesite clinker≤0.074mm.
4, magnesia tundish air-curtain brick of producing according to the production method of right 1～4 described tundish air-curtain brick and the method that cooperates barricade to use thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610107255 CN101028724A (en) | 2006-10-09 | 2006-10-09 | Intermediate air-curtain brick and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610107255 CN101028724A (en) | 2006-10-09 | 2006-10-09 | Intermediate air-curtain brick and its production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101028724A true CN101028724A (en) | 2007-09-05 |
Family
ID=38714369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610107255 Pending CN101028724A (en) | 2006-10-09 | 2006-10-09 | Intermediate air-curtain brick and its production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101028724A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102078957A (en) * | 2010-12-24 | 2011-06-01 | 莱芜钢铁股份有限公司 | Continuous casting tundish for improving cleanliness of molten steel |
| CN108329017A (en) * | 2018-03-19 | 2018-07-27 | 营口市瑞福来耐火材料有限公司 | Isometrical magnesia material of spherical shape and preparation method thereof and the application in producing the magnesia porous plug of disperse formula |
| CN112321305A (en) * | 2020-11-06 | 2021-02-05 | 陈晓林 | Multi-bubble ventilating element for refining steel ladle |
| CN113828764A (en) * | 2021-09-24 | 2021-12-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Continuous casting tundish cover and air blowing protection casting method thereof |
-
2006
- 2006-10-09 CN CN 200610107255 patent/CN101028724A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102078957A (en) * | 2010-12-24 | 2011-06-01 | 莱芜钢铁股份有限公司 | Continuous casting tundish for improving cleanliness of molten steel |
| CN108329017A (en) * | 2018-03-19 | 2018-07-27 | 营口市瑞福来耐火材料有限公司 | Isometrical magnesia material of spherical shape and preparation method thereof and the application in producing the magnesia porous plug of disperse formula |
| CN108329017B (en) * | 2018-03-19 | 2021-01-19 | 营口市瑞福来耐火材料有限公司 | Isometric spherical magnesium material, preparation method thereof and application thereof in producing dispersed magnesium air-permeable plug |
| CN112321305A (en) * | 2020-11-06 | 2021-02-05 | 陈晓林 | Multi-bubble ventilating element for refining steel ladle |
| CN112321305B (en) * | 2020-11-06 | 2022-06-03 | 营口四通高温新材料科技有限公司 | Multi-bubble ventilating element for refining steel ladle |
| CN113828764A (en) * | 2021-09-24 | 2021-12-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Continuous casting tundish cover and air blowing protection casting method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20070905 |