WO2010063157A1 - An iron trough of single-taphole furnace - Google Patents

An iron trough of single-taphole furnace Download PDF

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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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iron
ditch
parts
blast furnace
tapping
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PCT/CN2009/000293
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French (fr)
Chinese (zh)
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章荣会
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北京联合荣大工程材料技术研究院有限公司
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Priority to CNA2008101825097A priority Critical patent/CN101497930A/en
Priority to CN200810182509.7 priority
Application filed by 北京联合荣大工程材料技术研究院有限公司 filed Critical 北京联合荣大工程材料技术研究院有限公司
Publication of WO2010063157A1 publication Critical patent/WO2010063157A1/en

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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/10Shaped 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
    • C04B35/101Refractories from grain sized mixtures
    • C04B35/103Refractories from grain sized mixtures containing non-oxide refractory materials, e.g. carbon
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/013Shaped 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
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B7/00Blast furnaces
    • C21B7/14Discharging devices, e.g. for slag
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00Casings; Linings; Walls; Roofs
    • F27D1/0003Linings or walls
    • F27D1/0006Linings or walls formed from bricks or layers with a particular composition or specific characteristics
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00Casings; Linings; Walls; Roofs
    • F27D1/14Supports for linings
    • F27D1/141Anchors therefor
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/38Non-oxide ceramic constituents or additives
    • C04B2235/3817Carbides
    • C04B2235/3826Silicon carbides
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/42Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
    • C04B2235/422Carbon
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/54Particle size related information
    • C04B2235/5463Particle size distributions
    • C04B2235/5472Bimodal, multi-modal or multi-fraction

Abstract

An iron trough of single-taphole furnace comprises major iron trough and branch iron trough, in which the major iron trough is iron-storage iron trough. The material of the iron trough is Al2O3-SiC-C refractory castable material. The structure and material of the iron trough can extend the life of the iron trough.

Description

说 明 书 一种单铁口高炉出铁沟 技术领域  Description: A single iron mouth blast furnace tapping groove
本发明涉及一种长寿化的单铁口高炉出铁沟。 背景技术  The invention relates to a long-lived single iron mouth blast furnace tapping groove. Background technique
现代大高炉出铁沟已普遍使用优质的 A1203- SiC- C质低水泥浇注料。 因为浇 注料浇注密度高, 相对于同材质的耐火捣打料, 耐火浇注料更耐冲刷, 因而使 用寿命更长。 但传统的 A1203- SiC- C质低水泥耐火浇注料浇注的铁沟必须经过养 护硬化、 烘烤干燥等过程才能投入使用, 铁沟从开始浇注 (修补) 到投入使用 (开始出铁) 需要很长时间 (1天甚至数天间隔时间)。 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. However, 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).
一般大高炉都有 2个以上的出铁沟, 因此当其中一条铁沟必须重新造衬或 必须修补时, 只要堵住该条铁沟的出铁口后对该条铁沟进行浇注、 养护硬化、 烘烤干燥即可。 与此同时, 其他出铁口出铁正常, 不影响高炉的正常生产。  Generally, 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.
但容积为 1000立方米以下的中小型高炉一般设计为单个出铁口。 由于只有 一个出铁口,正常的出铁间隔只有 1〜3小时左右,计划休风时间一般也只有 8〜 10个小时, 因此不可能有时间保证一般浇注料造衬所需要的养护、 烘烤时间。 因此, 单铁口出铁的高炉普遍采用捣打料构筑铁沟内衬, 因为捣打料一般采用 树脂或焦油结合, 捣打施工后不必烘烤或略加短时间烘烤即可立即直接过铁水。  However, small and medium sized blast furnaces with a volume of less than 1000 cubic meters are generally designed as a single taphole. Since there is only one tapping port, the normal tapping interval is only about 1~3 hours, and the planned wind-off time is usually only 8~10 hours, so it is impossible to have time to ensure the maintenance and baking required for the general castable lining. time. Therefore, 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.
但捣打料存在使用寿命太短的问题, 用于主出铁沟的捣打料使用寿命一般 只有 1〜15天, 大部分都在 3〜5天。 这是因为捣打的沟衬耐火材料一般只是沟 底表面一层相对密实, 而表层以下及沟帮部位都很疏松, 不耐冲刷。 而由于捣 打的铁沟使用寿命太短, 造成出铁沟修补过于频繁, 炉前工人劳动强度太大, 造衬捣打质量更是难于保证。 However, there is a problem that 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. This is because 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.
因此如何有效的解决单铁口高炉出铁沟寿命的问题备受关注。  Therefore, how to effectively solve the problem of the life of the iron slab of the single iron mouth blast furnace has attracted much attention.
专利 200610086925提出了用一种树脂结合免烘烤浇注料替代捣打料来解决 单铁口高炉出铁沟使用寿命短的问题, 但这种浇注料由于主要是树脂结合, 树 脂用量相对较大, 实际使用过程中依然存在烧后浇注体结构疏松, 因而使用寿 命远不如大高炉所用的低水泥结合 A1203- SiC-C质浇注料的使用寿命长。 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. However, since 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.
实际上大高炉铁沟之所以通铁量高使用寿命长, 不仅因为是使用了浇注料, 而且还因为使用了储铁式结构。 即大高炉的出铁沟主沟在出铁期间和出铁间隔 时间内铁沟内总是储存大量的铁水, 因此铁沟耐火材料所处温度环境相对恒定。 而小高炉的非储铁式铁沟出完铁后铁沟完全暴露在空气中, 铁沟温度迅速降低, 耐火材料会反复出现因温度骤降而发生收缩开裂等急冷急热的损坏问题。 另外, 储铁式结构出铁沟的主沟内总是残存大量铁水, 因此出铁时从出铁口冲出并落 下的铁水冲击沟底的力量被储存在沟底的铁水缓冲, 不会对铁沟底形成太大的 冲击, 而这种落铁冲击正是小高炉主铁沟损坏的最重要原因之一。  In fact, 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. In addition, there is always a large amount of molten iron remaining in the main ditch of the iron-storage structure. Therefore, the force of the molten iron that is washed out from the taphole and dropped into the bottom of the ditch is stored in the molten iron at the bottom of the ditch. The bottom of the iron ditch forms too much impact, and this drop iron impact is one of the most important reasons for the damage of the main iron ditch of the small blast furnace.
但到目前为止, 还没单铁口高炉铁沟储铁式出铁沟的工艺方案与实践, 因 为如果没有合适的快硬免烘烤铁沟浇注料来进行配套, 则无法实现后续的快速 修补与维护, 而这种铁沟的修补又是必须的和持续的。 发明内容  However, so far, there is no single iron-iron blast furnace iron furrow iron-type iron tapping process and practice, because if there is no suitable fast-hard baking iron ditch castable for matching, it will not be able to achieve subsequent rapid repair. And maintenance, and the repair of this iron ditch is necessary and continuous. Summary of the invention
本发明要解决的技术问题是, 提供一种使用寿命长的单铁口高炉出铁沟。 首先, 提供一种改进的具有快硬性能并可快速烘烤而不爆裂的低水泥结合 Al203-SiC-C质耐火浇注料浇注, 出铁沟釆用这种能够用于现场浇注、 且无需长 时间烘烤即可通过铁水的耐火浇注料浇注, 从而可以获得高密度耐冲刷, 且能 满足单铁口高炉出铁沟所要求的短养护、 烘烤时间以适应单铁口高炉的生产节 奏的出铁沟, 从而获得一种使用寿命长、 能经受快速供烤而不爆裂的出铁沟; 并且, 还提供了一种用于单铁口高炉的储铁式出铁沟, 该储铁式出铁沟的 结构由于主铁沟内总是残存大量铁水, 因此出铁时从出铁口冲出并落下的铁水 冲击沟底的力量被储存在沟底的铁水缓冲, 不会对铁沟底形成太大的冲击, 从 而可以提高出铁沟的使用寿命。 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. Firstly, 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. Produce a rhythm tapping groove to obtain a tapping groove that has a long service life and can withstand rapid baking without bursting; Moreover, 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.
本发明所提供的耐火浇注料是选用刚玉或高铝耐火骨料为骨料, SiC、 电熔 白刚玉粉、 沥青粉、 金属 Si粉等为粉料, 以铝酸钙水泥为结合剂, 并加入金属 铝粉、 乳酸铝、 偶氮甲酰胺、 和聚丙烯纤维等防爆成分。 从而配制出能够用于 现场浇注、 且无需长时间烘烤即可通过铁水的耐火浇注料, 用于单铁口高炉的 出铁沟整体浇注造衬或修补。  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.
该耐火浇注料的具体材料的优选配比如下表:  The preferred composition of the specific material of the refractory castable is as follows:
上述配料中的 15种材料混合均匀成预混料备用, 使用时只需要加入干混料 重量 5〜8%的自来水混合搅拌成砂、浆即可用于浇注。 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.
本发明还提供了一种储铁式出铁沟, 即将传统的非储铁式出铁主沟改造为 储铁式出铁主沟。 该储铁式出铁主沟的具体结构为: 首先抬高撇渣器出口端支 铁沟沟底的标高, 使得撇渣器出口端支铁沟沟底的标高远高于撇渣器进铁口处 主沟底的标高; 而且要保证撇渣器出口端支铁沟沟底的标高接近于高炉出铁口 下沿高度, 只略低于高炉出铁口下沿高度 5〜10cm; 主铁沟从高炉出铁口向撇 渣器方向约 1 米处开始, 沟底标高迅速下沉, 使得沟底坡度减小, 以便在高炉 每次出完铁水后主沟内能够存留较多的铁水。  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 elevation of the bottom of the main ditch at the mouth; and to ensure that the elevation of the bottom of the iron ditch at the exit end of the skimmer is close to the height of the lower edge of the taphole of the blast furnace, only slightly lower than the height of the lower edge of the taphole of the blast furnace by 5~10cm; 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.
下面结合附图对该储铁式出铁主沟进行进一步的描述- 传统的单铁口高炉主铁沟, 可参见图 1。 其中, 1为高炉出铁口, 2为主铁' 沟, 3为撇渣器过梁, 4为支铁沟。 主铁沟沟底坡度较大, 而且撇渣器出铁口^ 支铁沟沟底标高 c几乎接近于撇渣器前端进铁口处主沟沟底的标高 b。 因此, 4 次出完铁以后主铁沟沟底不会残余铁水。 实际上, 传统的主铁沟每次出完铁以 后, 沟内不存留铁水, 传统的操作方法是炉前工人每次出铁前都要在主沟沟底 铺上黄沙, 以方便下一次清理少量残铁或残渣。  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. Among them, 1 is the blast furnace taphole, 2 is the main iron 'ditch, 3 is the skimmer beam, and 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.
本发明的储铁式出铁主沟, 可参见图 2。 其中, 1为高炉出铁口, 2为主铁 沟, 3为撇渣器过梁, 4为支铁沟。 首先抬高撇渣器出口端支铁沟沟底的标高, 使得撇渣器出口端支铁沟沟底的标高 c远高于撇渣器进铁口处主沟底的标高 b; 而且要保证标高 c接近于出铁口下沿高度 a, 略低于出铁口下沿高度 5〜10cm; 主铁沟从出铁口向撇渣器方向约 1 米处开始, 沟底标高迅速下沉, 使得沟底坡 度减小, 以便在高炉每次出完铁水后主沟内能够存留较多的铁水。  The iron storage main tapping groove of the present invention can be seen in Fig. 2. Among them, 1 is the blast furnace taphole, 2 is the main iron trench, 3 is the skimmer lintel, and 4 is the branch iron trench. Firstly, raise the elevation of the bottom of the iron sulcus at the outlet end of the skimmer, so that the elevation c of the bottom of the iron sulcus at the outlet end of the skimmer is much higher than the elevation b of the bottom of the main trench at the inlet of the skimmer; The elevation c is close to the height a of the lower edge of the taphole, which is slightly lower than the height of the lower edge of the taphole by 5 to 10 cm. 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.
本方案所提供的出铁沟, 主铁沟内将总能储存相当量的铁水, 使得主铁沟 铁变成了储铁式出铁主沟。 这种储铁式出铁沟将大大改善耐火材料的急冷急热 环境, 耐火材料得到更好烧结, 更利于耐火材料的长寿。 本方案所提供的出铁沟中的主铁沟, 每次新出铁水从出铁沟喷出并抛物线 落下时, 铁水将不直接砸在沟底耐火材料上, 而是落在了残存的铁水上, 这将 给沟底耐火材料以极好的缓冲, 对延长耐火材料寿命有极大好处。 In the tapping ditch provided by this scheme, a large amount of molten iron will always be stored in the main iron ditch, so that 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.
撇渣器底部的残铁口还是与传统的留法一样, 待要进行主铁沟或撇渣器修 理时, 主铁沟与撇渣器内的存留铁水将从撇渣器底部的残铁口放出。  The residual iron mouth at the bottom of the skimmer is still the same as the traditional method of retaining. When the main iron trench or skimmer is to be repaired, 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.
采用本发明所述的浇注料浇注具有上述结构的储铁式出铁沟, 浇注后 1 小 时即可脱模, 并可立即大火烘烤, 约 30分钟后即可出铁使用。  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.
用本发明所述的浇注料对出铁沟进行修补时, 可以采用套浇或涂抹工艺, 浇注成型后可立即脱模并可立即大火烘烤 10〜20分钟后即可出铁使用。  When the iron tap is repaired by the castable according to the present invention, 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.
本发明的优点在于:  The advantages of the invention are:
1、 由于主铁沟内一直有较多铁水存留, 出铁时的铁水将不直接砸在沟 耐 火材料上, 而是落在了残存的铁水上, 这将给沟底耐火材料以极好的缓冲 对 延长耐火材料寿命有极大好处;  1. Since there is always more molten iron in the main iron ditch, the molten iron will not fall directly on the ditch refractory material, but will fall on the remaining iron water, which will give the ditch refractory material excellent. Buffering has great benefits for extending the life of refractories;
2、 由于主铁沟内一直存留大量铁水, 沟内温度相对恒定, 耐火材料受急冷 急热影响相对较小, 对延长耐火材料寿命有极大好处;  2. Since a large amount of molten iron remains in the main iron ditch, the temperature in the ditch is relatively constant, and the refractory material is relatively less affected by rapid cooling and rapid heat, which has great benefits for extending the life of the refractory material;
3、 由于釆用浇注法施工造衬, 所构筑的沟衬从表面到内部都很致密, 不存 在捣打料只有表面密实而内部疏松的问题,因此出铁沟使用寿命可大幅度延长; 3. Since the lining is constructed by pouring method, 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;
4、 , 由于解决了快烘防爆技术, 因此将大高炉高品质铁沟料用于小高炉铁沟 的技术可能性得以解决, 本方案的浇注料基础为大高炉出铁沟浇注料, 用大高 炉沟料用于小高炉出铁沟可望获得更长的的使用'寿命。 4, Because the rapid drying and explosion-proof technology is solved, the technical possibility of using the high-quality iron ditch of the large blast furnace for the iron slag of the small blast furnace can be solved. 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.
5、 由于出铁沟使用寿命大幅延长, 所以炉前工人维护工作的劳动强度大幅 度降低;  5. Due to the significant extension of the service life of the tapping ditch, the labor intensity of the maintenance work of the furnace workers is greatly reduced;
6、 由于出铁沟使用寿命大幅延长, 因此单位铁产量的铁沟材料消耗也大幅 度降低, 不仅带来经济效益的提高, 还有环保意义上的资源节约与减少废渣的 好处。 附图说明 6. Since the service life of the iron tap is greatly prolonged, the consumption of iron trench material per unit of iron output is also greatly reduced, which not only brings about economic benefits, but also the benefits of resource conservation and waste reduction in environmental protection. DRAWINGS
附图 1是传统的单铁口高炉主铁沟剖面示意图, 1为高炉出铁口, 2为主铁 沟, 3为撇渣器过梁, 4为支铁沟;  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;
附图 2是本发明的储铁式出铁主沟结构示意图, 1为高炉出铁口示意图, 2 为主铁沟, 3为撇渣器过梁, 4为支铁沟。 实施例 釆用本方案对某钢铁公司 450立方米高炉主铁沟进行改造, 结果如下: 材料配料方案如下表所示-  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. EXAMPLES Using this scheme, the main iron ditch of a 450 cubic meter blast furnace of a steel company was reformed. The results are as follows: The material batching plan is shown in the following table -
上述配料中的 15种材料混合均匀成预混料备用, 使用时只需要加入干混料 重量 6%的自来水混合搅拌成砂浆后, 按上述图 2的结构对该厂的 3 #高炉铁沟 进行了储铁式改造。 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.
浇注范围包括全部的主铁沟和全部的支铁沟, 浇注后 30分钟左右脱模, 并 立即进行大火烘烤。 铁沟初次改造时洪烤时间大约 6小时, 待表面发红后即开 始出铁。  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.
主铁沟一次不修补通铁量超过 10万吨, 支铁沟一次不修补通铁量超过 15 万吨。  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.
在对上述铁沟进行修补时, 操作方法是使用上述浇注料进行套浇或和涂抹, 套浇成型后立即脱模并立即开始大火烘烤, 涂抹部位也是立即开始烘烤。 大火 烘烤 20〜30分钟后即开始出铁过铁。  When repairing the above-mentioned iron ditch, 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.

Claims

权 利 要 求 书 Claim
1、 一种单铁口高炉出铁沟, 该出铁沟具有主铁沟和支铁沟, 其特征在于: 该出铁沟采用具有快硬性能并可快速烘烤而不爆裂的低水泥结合 1. A single iron mouth blast furnace tapping ditch, the tapping ditch having a main iron ditch and a branch iron ditch, wherein: the tapping ditch adopts a low cement combination which has fast hard property and can be quickly baked without bursting.
A1203-SiC-C质耐火浇注料浇注; 该出铁沟中的主铁沟为储铁式出铁主沟, 即在两次出铁间隔中, 主铁沟中 总是残留大量的铁水。 Casting of A1203-SiC-C refractory castable; the main iron ditch in the tapping ditch is the main trough of the cast iron type, that is, in the interval of the two tappings, a large amount of molten iron remains in the main iron ditch.
2、 如权利要求.1所述的单铁口高炉出铁沟, 其中所述储铁式出铁主沟具有 以下特征:抬高撇渣器出口端支铁沟沟底的标高, 使得撇渣器出口端支铁沟沟底 的标高远高于撇渣器进铁口处主沟底的标高,而且保证撇渣器出口端支铁沟沟底" 的标高接近于高炉出铁口下沿高度, 只略低于高炉出铁口下沿高度 5〜10cm, 同; 时主铁沟从高炉出铁口向撇渣器方向约 1米处开始, 沟底标高迅速下沉,使得沟' 底坡度减小, 从而保证在高炉每次出完铁水后主铁沟内总能够存留较多的铁水。 2. The single iron mouth blast furnace tapping groove according to claim 1. wherein the iron storage type tapping main groove has the following features: raising the elevation of the bottom of the iron sulcus at the outlet end of the skimmer, so that the slag is slag The elevation of the bottom of the iron-ditch groove at the outlet end of the vessel is much higher than the elevation of the bottom of the main trench at the inlet of the skimmer, and the elevation of the bottom of the iron-ditch of the outlet of the skimmer is close to the height of the lower edge of the taphole of the blast furnace. , only slightly lower than the height of the lower edge of the blast furnace taphole 5~10cm, the same; the main iron ditch starts from the blast furnace taphole to the slag remover at about 1 meter, and the ditch bottom elevation sinks rapidly, making the ditch' bottom slope It is reduced to ensure that there is always more molten iron in the main iron ditch after the molten iron is discharged every time.
3、 权利要求 1或 2所述的单铁口高炉出铁沟, 其特征在于: 在该耐火浇注 料中配入了金属铝粉、 偶氮甲酰胺、 乳酸铝与聚丙烯纤维作为防爆组分。 3. The single iron mouth blast furnace tapping groove according to claim 1 or 2, characterized in that: the refractory castable is provided with metal aluminum powder, azoformamide, aluminum lactate and polypropylene fiber as explosion-proof components. .
4、 权利要求 1或 2所述的单铁口高炉出铁沟, 其特征在于: 其所用耐火浇 注料由以下材料组成: 4. The single iron mouth blast furnace tapping groove according to claim 1 or 2, wherein: the refractory castable used is composed of the following materials:
序 原料名称 粒度 比例 Material name particle size ratio
 number
1 棕刚玉 8〜5mm 18〜25份 1 brown corundum 8~5mm 18~25 servings
2 5〜3mm 10〜18份2 5~3mm 10~18 parts
3 3〜lmm 15〜25份3 3~lmm 15~25 parts
4 1〜 0mm 3〜9份 4 1~ 0mm 3~9 parts
5 SIC95 l〜0mm 5〜8份  5 SIC95 l~0mm 5~8 parts
6 325目 10〜15份 7 电熔白刚玉 325目 3〜8份6 325 mesh 10 to 15 servings 7 fused white corundum 325 mesh 3~8 parts
8 高温沥青 0.5mm 2〜4份… 8 high temperature asphalt 0.5mm 2~4 parts...
9 硅微粉 2〜4份 9 silicon micropowder 2~4 parts
10 金属硅(97) 2〜3份10 metal silicon (97) 2~3 parts
11 聚丙烯纤维 0.05〜 0.3 11 polypropylene fiber 0.05~ 0.3
 Share
12 铝酸钙水泥 2〜5份 12 calcium aluminate cement 2~5 parts
13 金属铝粉 0.05〜 0.5 13 metal aluminum powder 0.05~ 0.5
 Share
14 乳酸铝 0.05〜 0.5  14 aluminum lactate 0.05~ 0.5
 Share
15 偶氮甲酰胺 0.05〜 0.5  15 azocarboxamide 0.05~ 0.5
 Share
5、 一种单铁口高炉, 其特征在于: 该高炉的出铁沟采用如权利要求 1-4之 一所述的出铁沟。 A single iron mouth blast furnace, characterized in that: the tapping groove of the blast furnace adopts the tapping groove according to any one of claims 1-4.
6、 一种制备如权利要求 1或 2所述出铁沟的方法, 包括以下步骤: 将耐火 浇注料混合均匀成预混料, 并加入占混料重量 5-8%的水, 混合搅拌成砂浆后浇 注。 6. A method of preparing a tapping groove according to claim 1 or 2, comprising the steps of: mixing the refractory castable into a premix, adding 5 to 8% by weight of the mixture, mixing and stirring Cast after the mortar.
7、 如权利要求 6所述的方法, 其特征在于: 所述的耐火材料是选用刚玉 或高铝耐火骨料为骨料, SiC:、 电熔白刚玉粉、沥青粉和金属 Si粉为粉料, 以铝 酸钙水泥为结合剂, 并加入金属铝粉、 乳酸铝、 偶氮甲酰胺、 和聚丙烯纤维作 为防爆成分。 7. The method according to claim 6, wherein: the refractory material is selected from corundum or high alumina refractory aggregate, SiC:, fused white corundum powder, asphalt powder and metal Si powder. The material is a calcium aluminate cement as a binder, and metal aluminum powder, aluminum lactate, azoformamide, and polypropylene fiber are added as an explosion-proof component.
8、 如权利要求 6或 7所述的方法, 所述的耐火材料由以下材料组成: 8. The method of claim 6 or 7, wherein the refractory material consists of the following materials:
序 原料名称 粒度 比例 号 Material name particle size ratio number
1 棕刚玉 8〜5mm 18〜25份  1 brown corundum 8~5mm 18~25 servings
2 5〜3mm 10〜18份  2 5~3mm 10~18 parts
3 3〜lmm 15〜25份 4 l~0mm 3〜9份3 3~lmm 15~25 parts 4 l~0mm 3~9 parts
5 SIC95 l~0mm 5〜8份5 SIC95 l~0mm 5~8 parts
6 325目 10〜15份6 325 mesh 10 to 15 servings
7 电熔白刚玉 325目 3〜8份7 fused white corundum 325 mesh 3 to 8 servings
8 高温沥青 0.5mm 2〜4份8 high temperature asphalt 0.5mm 2~4 parts
9 硅微粉 2〜4份9 silicon micropowder 2~4 parts
10 金属硅(97) 2〜3份10 metal silicon (97) 2~3 parts
11 聚丙烯纤维 0.05〜 0.3 份 11 polypropylene fiber 0.05~ 0.3 parts
12 铝酸钙水泥 2〜5份 12 calcium aluminate cement 2~5 parts
13 金属铝粉 0.05〜 0.5 份 13 metal aluminum powder 0.05~ 0.5 parts
14 乳酸铝 0.05〜 0.5 份  14 aluminum lactate 0.05~ 0.5 parts
15 偶氮甲酰胺 0.05〜 0.5 份  15 azocarboxamide 0.05~ 0.5 parts
PCT/CN2009/000293 2008-12-05 2009-03-18 An iron trough of single-taphole furnace WO2010063157A1 (en)

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