• 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:
    An improved apparatus for supplying the refining gas and protective media utilized in the refining process described in U.S. Pat. No. 3,706,549 issued Dec. 19, 1972, including valves provided in the supply lines for preventing malfunctioning of the process.
    公开号:SU728721A3
    申请号:SU742021673
    申请日:1974-05-08
    公开日:1980-04-15
    发明作者:Бротцманн Карл；Фассбиндер Ханс-Георг
    申请人:Айзенверк-Гезельшафт Максимилианс- Хютте Мбх (Фирма)；
    IPC主号:
    专利说明:

    one
    The invention relates to ferrous metallurgy, in particular, to the construction of devices for producing liquid metal, for example, in an oxygen converter.
    A device for blowing a liquid metal is known, which is a lance with the help of which oxygen is introduced into the liquid metal to carry out the reaction of refining the metal from the impurities contained in it 1.
    The closest to the described invention to the technical essence and the achieved result is a device for blowing a liquid metal, containing tuyeres for supplying the reaction gas with a powdered material in a protective ring 1: gas and pipelines with check valves connected to the tuyeres 2.
    In the known device, the spontaneous entry of material into the dust pipe is eliminated and there is an opportunity without the use of any additional locking devices to supply pure metal to the metal without powder material. However, when approaching the tuyeres of the Excavating medium, for example, the natural
    gas, carbon dioxide gas does not prevent the passage of oxygen 2 and, thus, does not guarantee the explosion-proof system for supplying gases to the tuyere.
    The aim of the invention is to increase explosion safety.
    This is achieved by the fact that the device is equipped with pressure reducing valves installed in protective gas pipelines and a membrane-type pressure multiplier connected to one side of the diaphragm with the reaction gas line and, on the other, with pressure reducing valves.
    In each supply for the protective environment, there is a control valve controlled by oxygen pressure, a pressure reducing valve and after it a check valve. Thus, the pressure of the protective medium for each nozzle depends on the pressure of oxygen in the main supply for all the nozzles, or on the pressure of oxygen in the inlets to the individual nozzles or in the supply to the corresponding nozzle. To eliminate fluctuations in oxygen pressure caused by different amounts of lime dust, it is sufficient to apply pressure control of the protective medium.
    depending on the oxygen pressure in the main feed for all nozzles.
    The control valves can be controlled together or all the media supply can be connected to one common control valve with an appropriate number of nozzles with a number of taps. The common valve thus frees up for each supply a corresponding live cross-section of flow.
    Preferably in the direction of flow before the control valves to position the check valve. The pressure in the supply for the protective environment is lower than the oxygen pressure; here, if, for example, there is a pressure ratio change due to; the fact that the nozzle is destroyed for some reason, and oxygen penetrates into the annular cavity for the protective environment, the corresponding check valve 1H begins to function, which prevents penetration of the conductive system located behind the high pressure oxygen. If the ratio of pressures changes so that the oxygen pressure drops, then the pressure of the protective medium decreases accordingly with the help of pressure reducing valves, so that the pressure of the protective medium also becomes lower than the pressure of oxygen, Hanpvsmer oxygen suspension is limestone dust. Thus, there is no possibility of entering the protective environment in the pipeline for oxygen
    FIG. 1 shows the proposed device; in fig. 2 - flow valve for dust and gas mixture; in FIG 3, a control valve for several nozzles.
    In pipeline 1 of the protective medium: 1y, for example for gaseous or liquid hydrocarbons, there is a back-pressure valve 2 through which the protective medium is supplied to the control valves 3. In series with each control valve, relief valves 4 and check valves 5 are placed connected to the nozzles of the tuyere for blowing out the metapl. The pressure reducing valves 4 are controlled by a multiplier 7 by means of pressure in the pipe 8 having a bypass 9 with a check valve 10, a blend 11 and a locking valve 12. The pipe 8 has Yuke lock valve 13, control valve .4 and lime feeder 15. The reverse flow of oxygen through the feeder 15 is prevented by the check valve 10. Through the bypass 9 with the shut-off valve 12 open, a small amount of oxygen supplied through the main inlet 16 can be detected by the response of the cross section of the hood 11. Column pressure at point 17 through the multiplier 7 has an effect on pressure reducing valves 4 in pipelines for a protective environment, however, due to the insignificant amount of oxygen flowing in bypass 9, these fluctuations have little effect. As a result, each pressure change at point 17 acts on the pressure reducing valves 4 without any time delay and leads to a corresponding change in the pressure of the protective medium.
    If the check valve in the bypass 9 is closed, the full oxygen pressure is set on the multiplier 7 and the reduction valves 4 are fully opened. This operating condition occurs when, with a relatively small amount of oxygen, you need to have large quantities of protective medium to actuate the nozzles 6, for example, when using tuyeres as burners for the purpose of heating a newly lined converter for the preliminary heating of cold scrap in the converter,
    During purge, valve 12 is constantly open ,. since otherwise, if the lance nozzle is out of operation, there is a danger of bypassing the inert medium into the pipeline for oxygen, noTOM j that the reduction valves 4 with the non-return valve closed are completely open but do not function. However, to prevent the medium in the pipeline for oxygen from being closed, the valve 5, in series with the feeder 3.5, has a control plate 18 limiting cross-section, which is located with, opposite to the outlet of the lime distributor 20 and movable relative to the outlet 19. The control plate so The process of refining is. P is located in the lower position and releases the cross section of the opening: and for the supply of oxygen to the individual nozzles. However, if the shut-off valve 12 is closed and the nozzles function as burners, the control plate moves in the direction of the outlet 19. Thus, the amount of oxygen can be reduced over a wide range while maintaining the total oxygen pressure (1 example 15 atm) in lime distributor 20. If, as a result of a nozzle breakage, oxygen exhausts from it, then the full pressure of oxygen very quickly occurs in the nozzle and the protective medium by-pass is prevented, since its pressure is equal to, for example, only half of the oxygen pressure.
    Instead of several parallel control valves 3, only one control valve with the corresponding number of nozzles and a number of taps can also be connected in series to the control valve 2 in the protective medium pipeline 1. Such a control valve has a connecting cone 23 connected to the chamber 21 and an axially adjustable cone 23 that can move to the nozzles in the zone of several inlet ports 24 in one plane 25. In the control valve, the total pressure prevails when propane is used, for example, 8 atm. By axially moving the adjusting cone 23, the free cross section of each inlet is changed and the amount of protective medium supplied to the nozzles is adjusted.
    Instead of a single control valve for all nozzles, several control valves can also be used that control the amount of protective medium supplied to the nozzle group. In this case, the control valves can have a common or separate mechanical, pneumatic or hydraulic actuator for movement. In addition, the nozzles may also consist of more than two concentric tubes and have several concentric annular cavities for a protective environment. In this case
    The annular cavities of each individual nozzle are provided with a common supply for a protective environment.
    Thus, the proposed device prevents the bypass of the protective environment and premature failure of the nozzles.
    权利要求:
    Claims (2)
    [1]
    1. USSR author's certificate 38373b, cl. C 21 C 5/48, 1970.
    [2]
    2. Intensification of metallurgical processes by injecting powdered materials. Proceedings of the Republican Scientific Conference December 15-17, 1970, M., 1972, p. 221-222.
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    同族专利:
    公开号 | 公开日
    DE2326754B2|1977-08-18|
    DE2326754C3|1978-04-20|
    US4050681A|1977-09-27|
    JPS5335844B2|1978-09-29|
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CA625962A|1961-08-22|Johannsen Adolf|Apparatus for roasting finely-particled sulfidic ores and other materials containing roastable sulfur|
    US3343826A|1960-06-27|1967-09-26|Exxon Research Engineering Co|Fluid fuel control system and apparatus for furnaces|
    FR1310593A|1961-10-13|1962-11-30|Siderurgie Fse Inst Rech|Method of regulating fuel injections in a blast furnace|
    GB1253581A|1968-02-24|1971-11-17|Maximilianshuette Eisenwerk|Improvements in processes and apparatus for making steel|
    DE2065176A1|1969-04-16|1972-09-14|Centre de Recherches Metallurgi ques, Centrum voor Research in de Me tallurgie, Association sans but lucra tif, Vereniging zonder wmstoogmerk, Brüssel|Converter for refining pig iron with oxygen precipitation from 2017694|
    US3801305A|1971-06-16|1974-04-02|Maximilianshuette Eisenwerk|Process for continuously refining metals,notably,pig-iron|
    US3820768A|1971-07-19|1974-06-28|Pennsylvania Engineering Corp|Steel conversion method and apparatus|
    FR2182633B2|1971-07-29|1974-11-08|Creusot Loire|
    US3851866A|1971-12-09|1974-12-03|H Knuppel|Process and a device for even distribution and alternating supply of liquid and gaseous protective media for the refining gas tuyeres of a converter|
    US3796420A|1972-03-30|1974-03-12|Pennsylvania Engineering Corp|Steel conversion apparatus|
    US3897047A|1972-07-27|1975-07-29|United States Steel Corp|Apparatus for and method of refining an iron base melt|
    US3895785A|1972-08-01|1975-07-22|United States Steel Corp|Method and apparatus for controlling the operation of a steel refining converter|
    US3871633A|1973-04-25|1975-03-18|United States Steel Corp|Method and apparatus for controlling the injection of flux into a steelmaking vessel as a function of pressure differential|US4235452A|1977-04-13|1980-11-25|Josef Linecker|Cross-country ski shoe and binding|
    DE2825851C2|1978-06-13|1980-08-21|Maximilianshuette Eisenwerk|
    DE2845004C2|1978-10-16|1980-12-11|Mannesmann Demag Ag, 4100 Duisburg|Nozzle arrangement for steelmaking furnaces, especially for steel mill converters|
    US4330326A|1979-08-24|1982-05-18|Eisenwerk-Gesellschaft Maximilianshutte Mbh.|Method and a means for introducing close-grained carbonaceous fuels into a molten iron bath|
    EP0045658A1|1980-08-06|1982-02-10|British Steel Corporation|Gas inlet orifice monitoring|
    US4358092A|1980-08-13|1982-11-09|Voest-Alpine Aktiengesellschaft|Exothermic reaction, system for supplying a reactant gas and a shielding fluid to a reactor, and control signal generating circuit for use in said system|
    DE3045966A1|1980-12-05|1982-07-08|Korf Industrie Und Handel Gmbh + Co Kg, 7570 Baden-Baden|METHOD FOR PROTECTING THE NOZZLES AND THE FIRE-RESISTANT LINING OF A VESSEL TO FRESH A METAL MELT|
    JPS6152213B2|1981-02-27|1986-11-12|Nippon Steel Corp|
    AT377008B|1983-05-06|1985-01-25|Voest Alpine Ag|METALLURGICAL VESSEL FOR MELTING METAL|
    AT407751B|1999-09-22|2001-06-25|Voest Alpine Ind Anlagen|METHOD FOR INFLATING GAS AND SOLIDS UNDER BATH|
    FR2860514A1|2003-10-03|2005-04-08|Sanofi Synthelabo|ARYLALKYLCARBAMATE DERIVATIVES, THEIR PREPARATION AND THEIR THERAPEUTIC APPLICATION|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE19732326754|DE2326754C3|1973-05-25|1973-05-25|Device for the controlled supply of a fresh gas and a protective fluid medium|
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