• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Mouldable fire- or heat-resistant refractory material is shaped into a heat-resistant layer and burnt, so as to form the wall of a mould used to cast a cooling block with coolant linkage running in a barrel-stave pattern. One or more pipes, through which coolant flows, are then mounted inside the mould, and a cooling block is cast by pouring in molten metal into the space formed in the mould.
    公开号:SU927103A3
    申请号:SU792856203
    申请日:1979-12-11
    公开日:1982-05-07
    发明作者:Ничитани Теруики；Нагахара Масайоси
    申请人:Ниппон Стил Корпорейшн (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to foundry manufacture, in particular the process of manufacturing a furnace wall structure by a block.
    The known furnace design consists of a calcined refractory block and a cooler, which is a cooling system cast on the refractory block so as to provide a working cooling surface constituting a single whole with the refractory block. The inner walls of metallurgical furnaces are used, for example, for smelting iron ores or for refining molten metal, which is protected by separate cooling means. Various methods are known for cooling such a refractory layer, and among them is the use of a furnace cooler, which is increasingly used in industry. The refractory wall of the blast furnace includes a series of furnace coolers designed to cool the furnace, each of which is molded together, those with a cooling tube. The specified cooler is attached to the inner 5 surfaces of the shell, and the refractory brick is laid on the inner surfaces of the cooler and fixed with resin that serves as a binder. The furnace is cooled by water flowing through the tubes and extracting heat from the inner surface of the furnace. The cooling tubes of each furnace cooler are connected using a connecting pipe.
    15 tubes. In the manufacture of the refractory walls of a blast furnace of the above described design, a series of furnace coolers and refractory bricks are usually mounted separately. If the cooling surface of the furnace cooler is flat, then no special equipment is required to install the refractory walls, but if this surface is P shaped or has some other shape with protrusions, then refractory bricks of various sizes are required on the inner surface of the cooler. and great art is required to lay out the refractory wall with minimal crevices and gaps.
    The closest technical solution to the invention is a method that includes placing reinforcing tubes under a cooling agent in a casting mold and pouring in molten metal followed by combining the resulting metal part, the cooler, with the molded refractory block. The refractory layer can also be laid out by fitting the refractory bricks in the slots of the working cooling surface of the cooler. The refractory layer can be dried, but is very difficult to burn. The refractory wall made by this method must be burned and since it is burned by the heat in the furnace at the initial stage of operation, it often happens that the temperature and atmospheric conditions necessary for a particular refractory layer cannot be met. For example, the firing of a refractory made of molten silicon carbide is preferably carried out in a reducing atmosphere, but under industrial conditions of the furnace it is very difficult to control the conditions necessary to create such a reducing atmosphere. When laying a baked refractory layer, the tlping method is for immediate use, but to ensure good contact between the refractory layer and the working cooling surface of the chiller, as well as to maintain the same strong contact, it is necessary to use a set of restrained bricks but also to use a set of restraining devices 1
    However, the binder capacity of a resin or other binder gradually during operation of the refractory walls for a long period of time and eventually the bricks are held in place only by the force of interaction with each other and if one of them wears out, this leads to a breakdown of the connection between bricks, because of which bricks are often
    begin to move away from the cooler one by one.
    The purpose of the invention is to increase the service life of a block of the furnace wall of a metallurgical furnace, as well as to improve the connection of the cast metal with the refractory block.
    This goal is achieved in that according to the method, including placing the reinforcement tubes under the cooling agent in a mold and pouring them with molten metal followed by combining the resulting metal part — a cooler with a preformed refractory block — the refractory block is formed with protrusions and depressions on one of the surfaces and they are annealed, after which, before being placed in the local form of reinforcing tubes and pouring them with metal, the refractory block is projected on its bottom with protruding upwards and side panels The surfaces are coated with a fiber of refractory material, and the lower parts of the pins are molded on the surfaces of the projections and depressions of the refractory block.
    FIG. t shows a blast furnace having refractory walls provided with coolers, longitudinal section; FIG. 2 — node A in FIG. 11 in FIG. 3 is a view from the side of the blast furnace shell for one example of a cooler in part AJ of FIG. C and S are different variants of the block structure of the furnace wall, cross section; FIG. 6 - a mold that is intended for illustration, a cross-section.
    The block structure includes the oxfadie 1 (metal part) refractory block 2. For the refractory block 2, a refractory cast material of suitable composition is used, which is selected depending on the type of metallurgical furnace and the place where the refractory material is used is molded into the block using a conventional molding process refractories, for example, by means of a vibratory molding process or by pressure molding, after which it is calcined.
    As shown in FIG. 4 itself
    权利要求:
    Claims (2)
    [1]
    the thin part of the refractory block 2 has the minimum thickness (T) necessary for the independent use of the block in the refractory wall 5 of the metallurgical furnace. One surface 3 of the block has protrusions and depressions made therein to provide a firm and unbreakable connection with the cooler 1. The surface of the refractory block 2 can have various shapes, provided that the thinnest parts of the block have a minimum thickness (T) required for use as the furnace wall. The refractory block 2 is formed with the pins j located in the protrusions and depressions of the surface 3 to provide a rigid connection with the cooler 1. The pins k can be a metal pin, or can be a refractory pin having the necessary shape. The refractory block 2 thus formed to meet the above requirements, it is further calcined at such temperatures and atmospheric conditions that are suitable for the refractory composition. During firing, the metal pin C is subjected to thermal action, but does not lose its pin function. To manufacture a cooler in accordance with this invention, the burned refractory block is located in a mold 5 for a cooler with a flat rough surface 3 of the block, and a reinforcing tube 6 through which cooling medium (for example, water flows during use of the cooler) is formed in the cavity 7 and after covering the sides of the protrusions on the rough surface 3 of the refractory block 2 or non-refractory fiber, for example, ceramic fiber 8, which absorbs thermal expansion or contraction The molten metal 9, for example, iron or copper, is then poured into the rotor, which solidifies. Fig. 6 shows a variant in which the refractory block 2 is placed on two molds 5, but block 2 may form the bottom of the mold. The fireproof refractory block 2 is covered with refractory fiber prior to pouring the chiller with molten metal as follows: If the fired refractory block 2 has protrusions and depressions, as shown in FIG. 4 and 5. It is used in this way to pour molten metal into the mold 5. Then a crack forms in the projection channel of the refractory block 2 due to shrinkage that accompanies the solidification of the molten metal during cooling. This increases the possibility of the refractory block 2 leaving the chiller 1 during operation. The furnace wall unit structure, which is a refractory block, is inextricably linked to the chiller, in accordance with the process of this invention, is intended for direct use as a furnace wall without installing a separate furnace wall on the inner surface of the refractory block, so that moving the refractory block from the cooler can be detrimental for this purpose. To prevent this, the sides of the protrusions of the coarse surface of the fired refractory block before casting the cooler are covered with refractory fiber. The fiber absorbs any shrinkage that accompanies solidification of the poured metal during cooling and effectively prevents the formation of cracks at the base of the protrusion of block 2. In the block construction so made, the furnace wall for the metallurgical furnace is annealed. The refractory block, the very thin part of which has the minimum thickness required for use as the furnace wall, is firmly and uninterruptedly connected to the cooler with pins and projections and hollows formed on the refractory block, and no cracks form in the projections of the refractory block, so that The block structure can be directly used as a refractory wall of a metallurgical furnace without installing a separate refractory wall on the inner surface of the refractory block. Since a rigid and intimate connection between the refractory block and the cooler is achieved not only by the pins, but also by adhesion between the depressions (the projections on the refractory block and the depressions) by the projections formed on the cooler, and due to the absence of cracking on the projections of the refractory block , the block will not move away from the cooling surface of the cooler during use of the block structure. In addition, since the refractory block associated with the cooler is made of annealed cast refractory material, the block structure has satisfactory flame retardant properties and high resistance to erosion, which increases the service life of the structure. In the embodiment described above, the calcined refractory block is connected to the cast metal (cooler) by means of both pins and protrusions (hollows) made on the surface of the block. 8 in another embodiment, a refractory block 2 having protrusions that are wider in the upper part than at the base, as shown in FIGS. 4 and 5, is fired and after coating the sides of the coarse surface with refractory fiber the molten metal is poured onto the block. At the same time, no trichin 10 is formed at the protrusions of the unit. Therefore, the refractory unit 2’s withdrawal from cooler 1 during operation can be prevented without using a pin, but using only projections and depressions in the unit that are engaged with protrusions and depressions in cooler 1 .JJ The large block structure of the furnace wall for a metallurgical furnace is manufactured as follows. Several, for example, two fired blocks 2, of the type shown in FIG. 4 and 5, are compressed with each other along the side surface 3 with a thin layer of refractory material placed between them. Two blocks are placed inside the mold for the cooler and, by implementing the procedure described here, a block structure of the required larger size is obtained. In this embodiment, the two refractory blocks are connected into one cooler and a rough line is made between two refractory blocks with a fiber layer the direction of their thickness, has the effect of limiting the development of blocks. Example. Fabrication of the furnace wall structure for a metallurgical furnace with dimensions of 600 X HOD mm. Molded silicon-based refractories are loaded into a flask with dimensions of 700 mm, a vibration force (frequency 60 Hz and acceleration 7) is applied to the flask to seal and with a pressure of 3 kg / cm - a refractory block is formed, U-shaped, as shown in fig. k, having a thickness (T) of 200 mm. The refractory material was fully calcined at 1,300 ° C. Two such baked refractories were placed with refractory fiber between the sides of 600 mm at the bottom of the mold with the fins facing up. 8, cavities of the mold were located reinforcing tubes and the surrounding sand mold was made. To prevent the refractory block edges from breaking due to shrinkage (shrinkage factor, for example, 8-12 / 1000) during solidification of the casting (for example, from cast iron), the sides of the projections on the rough surface of the block were covered with refractory fiber in an amount sufficient to compensate for possible shrinkage of the cast metal . After these preliminary procedures, the refractory block was heated with a burner and molten ductile iron was poured into the mold to produce a casting 200 mm thick. After removal of the mold, the casting was annealed for 6 hours to reduce the residual thermal stresses. A sample was cut out of the product to check for cracking that could occur during casting, no cracks were detected. This cooler was installed on the inner surface of the casing at the bottom of the blast furnace shaft. Compared to the refractory wall (based on alumina, 500 mm thick), which was connected to a cooler prepared in the usual way, and whose service life ranges from eight months to one year and two months, i refractory block the metallurgical furnace walls manufactured by the method of this invention have served continuously for three years with less wear. The cooler, which was lined with a refractory layer of fitted refractory bricks (based on silicon carbide, 200 mm thick) in the slots of the working cooling surface, worked as well as the cooler of this invention, up to one and a half years from the start of operation, and then the refractory layer suddenly disappeared from the surface of the cooler. This happened because there was a loss of communication between individual burnt bricks, and if one worn brick fell out, the neighboring bricks also began to fall, causing the next bricks to fall out one by one. According to the inventive method for making a block construction of a furnace wall for a metallurgical furnace, protrusions and depressions are formed on one surface of the fired refractory block, the sides of the protrusions are covered with refractory fiber and similar protrusions and depressions serve as part of the mold into which molten metal is melted for cooling the casting, so that there are no cracks in the protrusions on the block, and the projections and depressions thus obtained adhere to the protrusions and depressions H9 of the refractory block in order to ensure rigid breaking communication between the intercooler and otlitsh4 refractory block. 3to effectively prevents the refractory block from escaping during its use as a structural element of the furnace wall. Since the cooler is poured in with the pin, this makes communication with the refractory block even more durable, thus preventing the refractory block from completely withdrawing. In addition, the refractory block is made by molding and firing the molded refractory material, and even the thinnest part itself has the minimum thickness required for use as a furnace wall. For this purpose, a cooler provided with a refractory block that is firmly connected to it can immediately be used as a structural element for the refractory walls of a metallurgical furnace. Claim 1. A method of manufacturing a block design of a furnace wall of a metallurgical furnace, comprising placing reinforcing tubes under a cooling agent in a mold and pouring them with molten metal followed by combining the resulting metal part of the cooler with a preformed refractory block, characterized in that term of service), the refractory block is formed with protrusions and depressions on one of the surfaces and annealed, then before placing in the mold side and filling them with metal on its bottom refractory block placed upward and lateral projections of their surface coated fiber of refractory material.
    [2]
    2. A method according to claim 1, characterized in that, in order to improve the connection of the cast metal to the refractory block, the bottom of the pins is molded on the surfaces of the projections and depressions of the latter. Sources of information taken into account in the examination 1. USSR author's certificate, cl. B 22 D 19/22, 197.
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    同族专利:
    公开号 | 公开日
    FR2444245A1|1980-07-11|
    AU5370179A|1980-06-19|
    AU517071B2|1981-07-09|
    DE2949998A1|1980-06-19|
    JPS5579986A|1980-06-16|
    FR2444245B1|1982-10-29|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    FR2050524A5|1969-06-17|1971-04-02|V Nauchno Issle|Cooling components for metallurgical shaft - furnaces|
    FR2053891A5|1969-07-22|1971-04-16|Inst Ochistke Tekhno|Long life heat exchanger members|
    JPS4928274U|1972-06-12|1974-03-11|
    JPS5033528U|1973-07-19|1975-04-11|
    JPS5227558Y2|1973-07-19|1977-06-23|
    JPS5033527U|1973-07-19|1975-04-11|
    PL95965B1|1974-11-26|1977-11-30|THE COOLER, ESPECIALLY BLOCK FURNACE|
    JPS5329644Y2|1975-06-24|1978-07-25|JPS6137904A|1984-07-31|1986-02-22|Nippon Steel Corp|Protective wall of blast furnace body|
    JPH0328101Y2|1984-10-23|1991-06-18|
    LU87198A1|1988-04-13|1989-11-14|Wurth Paul Sa|COOLING PANEL FOR TANK OVEN|
    JPH06102805B2|1989-10-12|1994-12-14|川崎製鉄株式会社|Cooling method for the upper part of furnace shaft of blast furnace|
    FR2685009B1|1991-12-13|1994-10-07|Chavanne Ketin|COOLING PLATE FOR METALLURGICAL UNITS, ESPECIALLY FOR BLAST FURNACES.|
    JP2765449B2|1993-09-20|1998-06-18|日本鋼管株式会社|Blast furnace furnace cooling system|
    JP3397113B2|1997-12-26|2003-04-14|日本鋼管株式会社|Furnace structural members for vertical metallurgical furnaces|
    FI109937B|1999-05-26|2002-10-31|Outokumpu Oy|A process for manufacturing a composite cooling element for a metallurgical reactor melt compartment and a composite cooling element for the process|
    WO2001079564A1|2000-04-14|2001-10-25|Nippon Steel Corporation|Cooling device for blast furnace bottom wall bricks|
    JP4737814B2|2000-11-10|2011-08-03|Ｊｕｋｉ株式会社|Sewing machine control device and sewing machine control method|
    LU90755B1|2001-04-05|2002-10-07|Wurth Paul Sa|Cooling plate for a metallurgical furnace and method for manufacturing such a cooling plate|
    EP2733225B1|2012-11-15|2017-02-22|KME Germany GmbH & Co. KG|Cooling element assembly|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP15448378A|JPS5579986A|1978-12-12|1978-12-12|Stave for metallurgical furnace|
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