• 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:
    1498482 Metallurgical vessels EISENWERK GES MAXIMILIANSHUTTE mbH 7 Aug 1975 [8 Aug 1974]. 33054/75 Heading F4B A metal refining vessel comprises a refractory lining 33 Fig. 1 and, extending through the lining, one or more nozzles or tuyeres each having two concentric annular openings, an inner one 5 through which oxygen is to be blown into the vessel and an outer one 3 for protective jacket fluid, the tuyeres having a central core 8 of refractory material or metal. The tuyere of Fig. 1 is embedded in the lining, the outer tube 1 being of mild steel. The tube 2 is of special steel, the gap 3 between tubes 1 and 2 serving for the introduction of the protective fluid which may be natural gas, propane, butane or fuel oil. The next tube 4 also of special steel forms gap 5 for the oxygen which may be loaded with suspended solid materials, e.g. lime. The next tube 6 is of copper, providing a gap 7 for the introduction of other materials as necessary. Guides may be positioned in the annular gap 5 which give the oxygen a spin to ensure more rapid mixing with the molten metal. In the form of Fig. 3 the outer and inner annular openings are formed by a series of small channels 15, 16. The annular opening 20 for the oxygen has walls protected against abrasion by the solid matter in the oxygen. The copper tube 17 has a coating 18 of powdered metal applied by spraying. Tube 19 is chromium plated or is coated with metal powder or oxide-ceramic powder. A helical guide 25 gives the oxygen stream a spin. The whole tuyere is placed inside a mild steel tube 22 with a small gap 24 allowing the tuyere to be readily removed. The gap 24 may be used for a flow of protective hydrocarbon or filled with ceramic powder. The core 26 has a central tube 27 to accommodate measuring instruments 28 for determining the length of the tuyere. Other tubes 29, 30, of special steel, are for introducing solids, e.g. alloying elements, which are not suitable for loading in the oxygen stream. They may be introduced in an inert gas, e.g. nitrogen. Alternatively they may be used to introduce a gas or steam to stir the metal in the vessel. The tubes forming the annular openings are extended below the bottom of the vessel for connection to supply ducts (Fig. 4, not shown). The tuyere may have a cross-section other than circular, e.g. oval or polygonal and they may be in the side or bottom of the vessel. If in the bottom they may be inclined to the axis of the vessel to induce rotation in the melt.
    公开号:SU797593A3
    申请号:SU752163177
    申请日:1975-08-08
    公开日:1981-01-15
    发明作者:Кнюппель Хельмут；Бротцманн Карл；Фассбиндер Ханс-Георг；Фритц Эрнст
    申请人:Айзенверк-Гезельшафт Максимилиансхюттембх (Фирма)；
    IPC主号:
    专利说明:

    (54) SOPLO FUR # 1 FOR METAL BLOWING WITH OXYGEN AND PROTECTIVE GAS
    The invention relates to a black Nie tallurgy, namely to the design of devices for introducing gaseous reactants into a liquid metal.
    The device for introducing gaseous reagents, for example oxygen, is known, which is a cooled lance with nozzles, which is introduced into the converter with liquid metal on top of L.
    The closest to the proposed technical accuracy and the achieved result is a nozzle for metal purging with oxygen and protective gas containing concentrically arranged pipes with the formation of an annular gap between the central and outer pipe 1I. A nozzle is installed, for example, in the bottom of the converter, while oxygen is fed through the central pipe of the substowing, and in the annular gap, an ingenious gas, such as natural gas. Natural gas, a passage through the gap, provides cooling of the nozzle, and when it flows into the metal, it has a cooling and three-fold effect on the nozzle and the lining adjacent to the tuyere. Such a nozzle design enhances the assimilation of oxygen by the metal and significantly reduces the formation of melting dust 2.
    However, this device does not have sufficient stability due to the possibility of the tubes breaking up with pieces of a scroll when filling it into a converter.
    The purpose of the invention is to increase the resistance of the nozzle.
    The goal is achieved by the fact that the nozzle is equipped with a core of m mounted along the axis of the central tube with a gap with its inner wall. This core is made of refractory material from the group of magnesite / dolomite, alumina and fireclay,. and also from a refractory mixture containing magnesite or dolomite, or alumina or chamotte. The core can be made of heat-resistant steel, copper, ceramic material. In the core, one or several end-to-end k. LajioBs can be performed, and a channel can be performed along the center of the core.
    Due to this, damage to the nozzle opening is almost completely prevented, for example, by pieces of scrap. The use of the proposed nozzle leads only in certain cases to partial damage to the annular gap, but the operation of the nozzle is not disturbed,
    FIG. 1 shows a nozzle, a longitudinal section; in fig. 2 is the same, with elements for twisting the dust-gas flow; FIG. 3 - the same cross section.
    The nozzle consists of an outer steel pipe 1 and a pipe 2 from alloyed steel containing carbon d; 0.5%, chromium 18% and nickel 8%. Between pipes 1 and 2 there is an annular gap 3 for supplying a protective medium, such as hydrocarbons. Pipe 4 made of doped steel, together with the pipe 2 forms an annular gap 5 for supplying the reaction gas, for example oxygen. The pipe 4 forms together with the central pipe b an internal annular gap 7. Along the axis of the pipe 6, a core 8 is installed, made, for example, of a refractory mass enriched with magnesium oxide. A steel pipe 9 for the rod 10 defining the length of the nozzle is located in the center of the core. With this design, the nozzle is mechanically secure, which prevents damage by its heavy pieces of scrap when loading it into the Converter. The gap 5 for the reaction gas ensures its flow through the annular channel; this reduces the possibility of overlapping it with scrap bushes. In the annular gap 5 for the reaction gas (Fig. 2 are elements 11, which give the turbulence to the flow of the reaction gas,
    In another embodiment (FIG. 3), the gap 7 is made in the form of small channels. The nozzle has a copper pipe 12 with small channels 13. The surface of the pipe 12 has a chrome-plated layer 14, the surface of the pipe 4 is covered with a metal powder 15 having increased strength for wear. In the core 8 channels are formed with the help of pipes 16 and 17. All elements of the nozzle can be moved in the annular gap 3. The nozzle is installed in the stack 18 of the converter bottom. Pipelines are provided to the annular gaps for supplying the reaction and protective gases. The use of this & pl with a hard core and an output cross-section for the purge gas in the form of a Kültsev gap reduces the penetration depth of the purge gas at comparable pressures by about half compared to the known double nozzles pipes. The capacity of the reaction gas can be increased by varying the diameter of the nozzle core. The diameter of the nozzle core is chosen
    no less than 10 times the width of the annular gap between it and the internal wall of the central tube.
    The nozzle-free core of the nozzle can be made of various materials. Basically, the tube is filled to the size of the core diameter with a refractory ramming mass. High-quality magnesite masses with chromium and sulphite compounds can also be used. These masses have been successfully tested on the basis of dolomite, clay and chamotte. The tube surrounding the core forms an inner wall for a small annular gap to supply protective media or an inert gas, as well as an inner wall for an annular gap to supply the reaction gas.
    The core may be made of a gas-tight material, such as metals, metallic ceramics, cermet, or molten ceramic materials (corundum, mullite). In the case of gas-impermeable materials for the core, the additional guide tube is not absolutely necessary. The material for the core in this case forms an annular gap for the reaction gas. Copper, common carbon steel, and various types of alloyed steels, mainly with a chromium content of not more than 15%, are also used as metals for the core. From a technological point of view, the cross-sectional shape of the core is preferably circular, but not necessarily. Polygonal as well as asymmetrical shapes have proven themselves in particular cases. For example, you can use a nozzle with an oval core in the side wall in a matrenow oven.
    B. Core channels feed liquids or gases to act on a metal melt, for example, solid materials with an inert gas.
    Below is an example of the blowdown of molten iron with the addition of scrap in a 150 ton converter, the converter has an open discharge port. ,
    权利要求:
    Claims (2)
    [1]
    At the bottom of the converter, made of dolomite, two nozzles are mounted. Pipe 1 has an internal diameter of 350 mm and a wall thickness of 4 is made of ordinary carbon steel. The annular gap .3 has a width of approximately 0.5 mm. Pipe 2 consists of ordinary carbon steel and has a diameter of 340 mm and a wall thickness of 4 mm. The pipe 2 forms together with the pipe 12 a gap 7 for the protection of the sand, which consists of individual channels having a shape of a circular cross section. The number of channels around the circumference is 100 pieces, their height is about 1 mm, and the width is about 4 mm. The pipe 12 consists of alloyed steel of the following composition: 0.4% carbon and 13% chromium. A circular gap 5, which is 7 mm wide, is slurried out of the reaction gas and solid particles, for example lime. The pipe 4 forming this annular gap is made of copper. The annular gap 13 flows during the purge process to approximately 500 propane per nozzle. The annular gap 5, which is suitable for suspension from the reaction gas and solid particles, flows during the purging of 24,000 oxygen to each nozzle, into which a maximum of 6 kg of lime per 1m of oxygen is fed. In general, the melt is fed through both nozzles for 12 minutes with 7500 oxygen and 9000 kg of news. If there are 2 slips in the converter, then they are 250 mm from the center of the bottom and are located along the diameter of the bottom of the bottom below the tilting axis of the converter. The nozzles are mounted inclined in one direction of rotation of approximately 20 relative to the longitudinal axis of the converter in the direction of the tangent bottom. Cast iron of the following composition is carbonated: carbon 4.1 / silicon. 0.9 / manganese 0.8, phosphorus 0.15, sulfur 0.05 / temperature 1250s. Before the cast iron is fed into the converter, 45 tons of scrap are preheated for 1.5 minutes using nozzles. The propane flow rate here is 4000 and the oxygen consumption is 30,000. Scrap has an average heating temperature fe.400c. After a specified time, blowing steel has the following composition,%: carbon 0.4; Mar-mans 0.3; phosphorus 0,008; sulfur 0.02; nitrogen 0.002; hydrogen 0.0003. The melt temperature is 16200С in samples. Thus, the invention makes it possible to efficiently process cast iron into steel with good resistance of the tuyeres. Claim 1. Soplo tuyere for purging metal with oxygen and protective gas, containing concentrically arranged tubes with the formation of an annular gap between the central and outer tubes, characterized in that, in order to increase the durability of the nozzle /, it is provided with a core installed along the axis of the central tube with the gap with its inner wall. 2. The nozzle according to claim 1, characterized in that the core is made of a refractory material from the group of magnesite, dolomite, alumina and chamotte. 3. The nozzle under item 1, characterized in that the core is made of a refractory mixture, which includes magnesite or dolomite, or alumina, or chamotte. 4. The nozzle under item 1, characterized in that the core is made of heat-resistant steel. 5. Nozzle according to Claim. 1, characterized in that the core is made of copper. 6. The nozzle according to claim 1, characterized by the fact that the core is made of ceramic material. 7. Coiuio according to claims 1-6, characterized in that one or several through channels are made in the core. 8. The notion of clause 7, which is based on the fact that the through channel is made in the center of the core. Sources of information taken into account in the examination 1. USSR Patent No. 464129, cl. C 21 C 5/48, 1968.
    [2]
    2. The UK patent number 1253581, cl. F 4 B, 1968. in
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    同族专利:
    公开号 | 公开日
    NL7509485A|1976-02-10|
    DE2438142A1|1976-02-26|
    CS212299B2|1982-03-26|
    PL111428B1|1980-08-30|
    IT1041171B|1980-01-10|
    HU176383B|1981-02-28|
    AU8367675A|1977-02-10|
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    FR2282474A1|1976-03-19|
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    AR207871A1|1976-11-08|
    SE413781B|1980-06-23|
    CA1070944A|1980-02-05|
    NL166280B|1981-02-16|
    GB1498482A|1978-01-18|
    SE7508907L|1976-02-09|
    NL166280C|1981-07-15|
    FR2282474B1|1977-12-16|
    ES440080A1|1977-02-16|
    引用文献:
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    GB1253581A|1968-02-24|1971-11-17|Maximilianshuette Eisenwerk|Improvements in processes and apparatus for making steel|
    BE752893A|1969-07-08|1970-12-16|Forges De La Loire St Chamond|METHOD AND DEVICE FOR COOLING A REFINING CONVERTER TUBE|
    BE792348A|1971-12-28|1973-03-30|Uss Eng & Consult|PROCESS FOR BINDING SEALS IN METAL TUBES|
    US3832161A|1972-07-18|1974-08-27|Creusot Loire|Method of blowing-in through blast pipes submerged in a metallic bath|
    US3897048A|1973-06-15|1975-07-29|Pennsylvania Engineering Corp|Metallurgical vessel and method of operating same|US4023676A|1976-09-20|1977-05-17|Armco Steel Corporation|Lance structure and method for oxygen refining of molten metal|
    JPS5461104A|1977-10-21|1979-05-17|Asahi Glass Co Ltd|Stabilization of methylene chloride|
    JPS5715809B2|1977-10-27|1982-04-01|
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    FR2431542B1|1978-07-19|1980-12-05|Creusot Loire|
    JPS6144923B2|1979-06-09|1986-10-06|Nippon Steel Corp|
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    法律状态:
    优先权:
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    DE19742438142|DE2438142C3|1974-08-08|Nozzle for introducing reaction gas|
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