WO2010063157A1 - Entonnoir de fer de four à trou de coulée unique - Google Patents

Entonnoir de fer de four à trou de coulée unique Download PDF

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Publication number
WO2010063157A1
WO2010063157A1 PCT/CN2009/000293 CN2009000293W WO2010063157A1 WO 2010063157 A1 WO2010063157 A1 WO 2010063157A1 CN 2009000293 W CN2009000293 W CN 2009000293W WO 2010063157 A1 WO2010063157 A1 WO 2010063157A1
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WO
WIPO (PCT)
Prior art keywords
iron
ditch
parts
blast furnace
tapping
Prior art date
Application number
PCT/CN2009/000293
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English (en)
Chinese (zh)
Inventor
章荣会
Original Assignee
北京联合荣大工程材料技术研究院有限公司
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Publication of WO2010063157A1 publication Critical patent/WO2010063157A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
    • C04B35/101—Refractories from grain sized mixtures
    • C04B35/103—Refractories from grain sized mixtures containing non-oxide refractory materials, e.g. carbon
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/013—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics containing carbon
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/14—Discharging devices, e.g. for slag
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/0003—Linings or walls
    • F27D1/0006—Linings or walls formed from bricks or layers with a particular composition or specific characteristics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/14—Supports for linings
    • F27D1/141—Anchors therefor
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/38—Non-oxide ceramic constituents or additives
    • C04B2235/3817—Carbides
    • C04B2235/3826—Silicon carbides
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
    • C04B2235/422—Carbon
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/54—Particle size related information
    • C04B2235/5463—Particle size distributions
    • C04B2235/5472—Bimodal, multi-modal or multi-fraction

Definitions

  • the invention relates to a long-lived single iron mouth blast furnace tapping groove. Background technique
  • High-quality A1 2 0 3 - SiC- C low cement castables have been widely used in modern large blast furnace tapping ditch. Because of the high casting density of the castable, the refractory castable is more resistant to erosion than the refractory ramming material of the same material, so the service life is longer.
  • the traditional A1 2 0 3 - SiC- C low-cement refractory castable cast iron trench must be cleaned, baked and dried before it can be put into use. The iron trench is poured (repaired) to put into use (starting iron tapping) It takes a long time (one day or even several days).
  • the large blast furnace has more than two iron taps. Therefore, when one of the iron trenches has to be re-lined or must be repaired, the iron trench is poured and cured after the iron gate of the iron trench is blocked. Dry and bake. At the same time, the tapping of other tapping outlets is normal and does not affect the normal production of the blast furnace.
  • blast furnaces with single iron outlets generally use ramming materials to construct iron lining linings, because ramming materials are generally made of resin or tar. After battering, there is no need to bake or a short time to bake. molten iron.
  • the service life of the ramming material is too short, and the service life of the ramming material used for the main iron sump is generally only 1 to 15 days, and most of it is 3 to 5 days.
  • the lining refractory material of the beating is generally only a layer of a relatively dense surface at the bottom of the ditch, and the surface below the surface layer and the ditch portion are loose and incapable of scouring. Because the service life of the beaten iron ditch is too short, the iron ditch repair is too frequent, and the labor intensity of the workers in front of the furnace is too high. The quality of the lining is even more difficult to guarantee.
  • Patent 200610086925 proposes to solve the problem of short service life of the iron tapping of the single iron mouth blast furnace by using a resin combined with baking-free casting material instead of the ramming material.
  • the casting material is mainly composed of resin, the amount of resin is relatively large. In the actual use process, the structure of the castable body after burning is still loose, so the service life is far less than the long service life of the low cement combined A1 2 0 3 - SiC-C castable used in the large blast furnace.
  • the reason why the large blast furnace iron ditch has a high iron content and long service life is not only because of the use of castables but also because of the use of the iron storage structure. That is to say, the main trench of the tapping gully of the large blast furnace always stores a large amount of molten iron in the iron ditch during the tapping period and the interval between the tapping intervals, so that the temperature environment of the iron ditch refractory material is relatively constant. However, the iron sump of the small blast furnace is completely exposed to the air after the iron is discharged. The temperature of the iron sulcus is rapidly reduced, and the refractory material will repeatedly suffer from the problem of rapid cooling due to sudden temperature drop and shrinkage.
  • the technical problem to be solved by the present invention is to provide a single iron mouth blast furnace tapping groove with a long service life.
  • an improved low-cement bonded Al 2 O 3 -SiC-C refractory castable with fast hardening properties and fast baking without bursting is provided, which can be used for on-site casting, And it can be poured by hot-dip refractory castable without long-time baking, so that high-density and erosion-resistant can be obtained, and the short curing and baking time required for the single iron mouth blast furnace tapping groove can be satisfied to adapt to the single iron mouth blast furnace.
  • an iron storage type iron sump for a single iron mouth blast furnace is provided, and the structure of the iron storage type iron sump is always rusted from the tap hole due to the fact that a large amount of molten iron remains in the main iron ditch.
  • the strength of the molten iron that hits and falls down the bottom of the ditch is stored in the molten iron buffer at the bottom of the ditch, which does not cause too much impact on the bottom of the iron ditch, thereby improving the service life of the iron ditch.
  • the refractory castable provided by the invention adopts corundum or high-aluminum refractory aggregate as aggregate, SiC, fused white corundum powder, asphalt powder, metal Si powder and the like as a powder, and calcium aluminate cement as a binder, and Explosion-proof components such as metal aluminum powder, aluminum lactate, azoformamide, and polypropylene fiber are added. Therefore, a refractory castable which can be used for on-site casting and can pass through molten iron without long-time baking is prepared, and is used for lining or repairing the cast iron groove of the single iron mouth blast furnace.
  • the preferred composition of the specific material of the refractory castable is as follows:
  • the 15 materials in the above ingredients are mixed and mixed into a premix for use. When used, it is only necessary to add 5 ⁇ 8% of tap water weight to mix and mix into sand and slurry for pouring.
  • the invention also provides an iron storage type iron tapping groove, which is to transform the traditional non-storage iron tapping main trench into a main iron storage tapping trench.
  • the specific structure of the iron storage main ditch is: firstly raise the elevation of the bottom of the iron ditch at the outlet end of the skimmer, so that the elevation of the bottom of the iron ditch at the exit end of the skimmer is much higher than that of the skimmer.
  • the ditch starts from the blast furnace taphole to the slag remover at about 1 m, and the ditch bottom elevation sinks rapidly, so that the ditch bottom slope is reduced, so that more molten iron can remain in the main ditch after each blast furnace discharge.
  • the iron storage main trench will be further described below with reference to the accompanying drawings - the conventional single iron mouth blast furnace main iron trench, see Figure 1.
  • 1 is the blast furnace taphole
  • 2 is the main iron 'ditch
  • 3 is the skimmer beam
  • 4 is the branch iron trench.
  • the slope of the main iron groove bottom is large, and the bottom elevation of the iron sump outlet of the skimmer is almost close to the elevation b of the bottom of the main trench at the front entrance of the skimmer. Therefore, after the iron is discharged four times, there will be no residual molten iron at the bottom of the main iron ditch. In fact, after the iron is drained from the traditional main iron ditch, there is no molten iron left in the ditch.
  • the traditional method of operation is to lay yellow sand on the bottom of the main ditch before the furnace is discharged, so that the next time Clean up a small amount of residual iron or residue.
  • the iron storage main tapping groove of the present invention can be seen in Fig. 2.
  • 1 is the blast furnace taphole
  • 2 is the main iron trench
  • 3 is the skimmer lintel
  • 4 is the branch iron trench.
  • the main iron ditch starts from the taphole to the direction of the skimmer at about 1 m, and the elevation of the ditch bottom sinks rapidly.
  • the slope of the ditch bottom is reduced, so that more molten iron can remain in the main ditch after the molten iron is discharged every time in the blast furnace.
  • the main iron ditch iron becomes the main ditch of the iron storage type tapping.
  • the iron storage type iron tapping groove will greatly improve the quenching and hot environment of the refractory material, and the refractory material is better sintered, which is more conducive to the longevity of the refractory material.
  • the main iron ditch in the tapping ditch provided by the scheme each time the new tap water is sprayed from the tapping ditch and the parabola falls, the molten iron will not directly lie on the refractory material at the bottom of the ditch, but falls on the remaining iron. On the water, this will provide excellent cushioning for the refractory material at the bottom of the trench, which will greatly improve the life of the refractory.
  • the residual iron mouth at the bottom of the skimmer is still the same as the traditional method of retaining.
  • the residual molten iron in the main iron trench and the skimmer will be from the residual iron mouth at the bottom of the skimmer. release.
  • the cast iron type iron tapping groove having the above structure is cast by using the castable according to the present invention, and the mold can be demolded in 1 hour after pouring, and can be immediately fired, and the iron can be used after about 30 minutes.
  • the casting or smearing process can be adopted, and the mold can be demolded immediately after casting, and can be immediately fired for 10 to 20 minutes.
  • the groove lining constructed is dense from the surface to the inside, and there is no problem that the smashing material has only a dense surface and a loose interior, so the service life of the tapping groove can be greatly extended;
  • the castable foundation of the scheme is the cast iron pouring material of the large blast furnace.
  • the use of blast furnace furrows for small blast furnace tapping trenches is expected to achieve longer life.
  • 1 is a schematic cross-sectional view of a conventional single iron mouth blast furnace main iron ditch, 1 is a blast furnace taphole, 2 is a main iron ditch, 3 is a skimmer lintel, and 4 is a branch iron ditch;
  • FIG. 2 is a schematic view showing the structure of the main structure of the iron storage type tapping of the present invention, wherein 1 is a schematic diagram of the taphole of the blast furnace, 2 is a main iron ditch, 3 is a skimmer beam, and 4 is a branch iron ditch.
  • 1 is a schematic diagram of the taphole of the blast furnace
  • 2 is a main iron ditch
  • 3 is a skimmer beam
  • 4 is a branch iron ditch.
  • the 15 materials in the above ingredients are mixed and mixed into a premix for use. Only dry mix is needed for use. After mixing 6% tap water into mortar, the 3# blast furnace iron ditch of the plant was transformed into iron storage type according to the structure of Fig. 2 above.
  • the casting range includes all the main iron furrows and all the iron furrows.
  • the mold is demolded about 30 minutes after pouring and immediately fired. When the iron ditch was first modified, the roasting time was about 6 hours. After the surface became red, the iron was started.
  • the main iron ditch does not repair the amount of iron in excess of 100,000 tons at a time, and the iron-clad ditch does not repair more than 150,000 tons of iron.
  • the operation method is to use the above-mentioned castable material for casting or smearing, and immediately after demolding, the mold is demolded and the fire is immediately started to be baked, and the application site is immediately started to bake. After the fire is baked for 20 to 30 minutes, the iron is discharged.

Abstract

L’invention concerne un entonnoir de fer de four à trou de coulée unique comprenant un entonnoir de fer principal et un entonnoir de fer secondaire, dans lequel l’entonnoir de fer principal est un entonnoir de stockage de fer. Le matériau de l’entonnoir de fer est un matériau réfractaire de Al2O3-SiC-C pouvant être coulé. La structure et le matériau de l’entonnoir de fer peuvent prolonger la durée de vie de ce dernier.
PCT/CN2009/000293 2008-12-05 2009-03-18 Entonnoir de fer de four à trou de coulée unique WO2010063157A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNA2008101825097A CN101497930A (zh) 2008-12-05 2008-12-05 单铁口高炉出铁沟储铁式改造技术
CN200810182509.7 2008-12-05

Publications (1)

Publication Number Publication Date
WO2010063157A1 true WO2010063157A1 (fr) 2010-06-10

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112125688A (zh) * 2020-09-28 2020-12-25 北京利尔高温材料股份有限公司 一种渣沟用浇注料
CN113185271A (zh) * 2021-01-27 2021-07-30 河南宏宇新材料科技有限公司 管道耐磨浇注料及其制备方法
CN114774603A (zh) * 2022-04-29 2022-07-22 马鞍山钢铁股份有限公司 一种高炉出铁沟高温辐射热的回收利用系统
CN115216567A (zh) * 2022-06-21 2022-10-21 首钢集团有限公司 一种分离罐以及渣铁分离系统
CN115572154A (zh) * 2022-09-20 2023-01-06 中冶武汉冶金建筑研究院有限公司 一种环保型摆动流嘴用铁沟浇注料及其使用方法

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CN102618678B (zh) * 2012-03-28 2014-11-26 攀钢集团西昌钢钒有限公司 高炉渣铁分离装置、渣铁分离方法和高炉下渣铁回收方法
CN102766709B (zh) * 2012-07-09 2014-03-26 莱芜钢铁集团有限公司 利用独立承载结构延长高炉主沟的使用寿命的方法
CN103253946B (zh) * 2013-04-25 2016-03-09 郑州航空工业管理学院 一种防爆低水泥浇注料的使用方法
CN103253945B (zh) * 2013-04-25 2016-01-20 天津佰思特新材料科技有限公司 一种防爆低水泥浇注料
CN104177106B (zh) * 2014-09-02 2016-03-09 吴雪健 一种高炉出铁过程中的撇渣设备的制备方法
CN104557079A (zh) * 2014-12-12 2015-04-29 长兴优联马科技有限公司 一种防爆asc铁水包用耐火浇注料
CN109252007A (zh) * 2018-11-19 2019-01-22 云南玉溪仙福钢铁（集团）有限公司 一种高炉储铁式大沟
CN109797261B (zh) * 2018-12-25 2023-12-22 中国京冶工程技术有限公司 可快速修补的高性能主铁沟及其制备方法和施工方法
CN113789419B (zh) * 2021-09-14 2023-01-17 鞍钢股份有限公司 一种虹吸式放砂口装置及放砂口方法

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112125688A (zh) * 2020-09-28 2020-12-25 北京利尔高温材料股份有限公司 一种渣沟用浇注料
CN113185271A (zh) * 2021-01-27 2021-07-30 河南宏宇新材料科技有限公司 管道耐磨浇注料及其制备方法
CN114774603A (zh) * 2022-04-29 2022-07-22 马鞍山钢铁股份有限公司 一种高炉出铁沟高温辐射热的回收利用系统
CN114774603B (zh) * 2022-04-29 2024-01-30 马鞍山钢铁股份有限公司 一种高炉出铁沟高温辐射热的回收利用系统
CN115216567A (zh) * 2022-06-21 2022-10-21 首钢集团有限公司 一种分离罐以及渣铁分离系统
CN115216567B (zh) * 2022-06-21 2024-02-06 首钢集团有限公司 一种分离罐以及渣铁分离系统
CN115572154A (zh) * 2022-09-20 2023-01-06 中冶武汉冶金建筑研究院有限公司 一种环保型摆动流嘴用铁沟浇注料及其使用方法

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