• 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:
    Gas feeding system and method for metal melting furnaces, washing spoons or maintenance ovens, the gas supply system comprising at least one stopper made of refractory material, which is in fluid communication with a first source of gas and a second source of gas through pipes; further comprising an auxiliary step in the manner of a pipe loop; the gases from the gas sources are of the reducing and inert type, allowing to reduce the oxygen content of the molten metal and homogenize the metal mixture, respectively; the system and method of the present invention allow to reduce the polluting emissions of co and co2; in addition, they allow to lengthen the life of the plug, by avoiding the obstructions of molten metal in the holes of the plug and by guaranteeing an adequate transition from one gas to the other. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2578801A1
    申请号:ES201630105
    申请日:2016-01-28
    公开日:2016-08-01
    发明作者:Miquel Garcia Zamora；Gabriel Font Puig；Francesc Farriol Almirall
    申请人:La Farga Lacambra SA；
    IPC主号:
    专利说明:

    image 1
    image2
    image3
    image4
    image5


    The control means can drive the means for pressure regulation when it is determined by the control means that the pressure value read diverges from the predetermined pressure value.
    5 Other features and advantages of the gas feeding system for foundry furnaces and the method followed objects of the present invention will be apparent from the description of a preferred, but not exclusive, embodiment illustrated by way of non-limiting example in the accompanying drawings, in which: 10 BRIEF DESCRIPTION OF THE DRAWINGS
    Figure 1.- It is a view of a scheme of the gas supply system for foundry furnaces according to the present invention; Figure 2.- It is a schematic view of a cross section of a circular section oven
    15 with a cap according to the invention; Figure 3.- It is a schematic view of a cross section of an oven of rectangular section with a plug of the system according to the invention; Figure 4.- It is a schematic view of a plug of the system according to the invention; and Figure 5.-It is a diagram that relates the amount of oxygen in ppm present in the metal
    20 fused over time and the flow rate of reducing gas supplied by the system of the present invention to the molten metal.
    DESCRIPTION OF A PREFERRED EMBODIMENT
    25 As shown in the attached figures, a preferred embodiment of the present invention is shown, which in no case should be understood as exclusive. In these figures, elements not visible with dashed lines have been represented.
    A diagram of the present gas supply system 1 for
    30 metal smelting furnaces, ladle spoons, or maintenance furnaces that can be of any type but are preferably used in an oven 4, and preferably for the smelting of non-ferrous metals, such as copper, and more preferably for copper refining from copper scrap with a copper content greater than or equal to 90%. Continuing with the oven 4, it preferably comprises a
    35 container or vessel as shown in figures 2 and 3.
    7
    image6
    image7
    image8
    5
    10
    fifteen
    twenty
    25
    30
    35


    they could be arranged at any other point of fluid communication between the second power supply 22 and the plug 3, such as in the conduit 62. The reading of the flow and pressure values is sent to the control means 5 where They compare with the default operating parameters. Depending on the results of the comparison, the control means 5 can further open the valve means 8 or the means for pressure regulation 72 until the readings received from the detector means 91 correspond to the predetermined parameters. This operation will continue until the user wishes or until the system itself decides on the basis of the preset instructions for example in terms of duration.
    In parallel, the operation for feeding the cap 3 with methane to reduce the amount of oxygen in the refining copper casting can be described. In this case, the control means will actuate the valve means arranged between the first gas source 21 and the plug 3, and then compare the pressure and / or flow values read by the detecting means 91 so that if they diverge from the preset parameters the control means can additionally actuate the valve means 8 or even the means for pressure regulation 71.
    A case is described below in which gases are supplied simultaneously from two gas sources 21, 22.
    Assuming that the system is feeding nitrogen through the conduit 62 towards the plug 3 and the user or the control means 5 autonomously order the methane injection to reduce oxygen, the control means 5 will actuate the valve means 8 linked to the first gas source 21 and the pipeline 61 so that methane and nitrogen are simultaneously supplied through the plug 3. The detecting means 91 will measure the flow rate and / or the pressure of the gas mixture and compare them with the predetermined parameters , so that if the control means 5 diverge they can act on the valve means 8 distributed by the gas supply system 1 or even on the means for pressure regulation 71, 72 until there is no significant divergence with the default parameters. Then the control means 5 can order the closure of the valve means 8 related to the nitrogen supply so that the plug can only feed methane to the copper casting and therefore only the metal oxygen will be reduced molten. The transition will be done in a controlled manner over time.
    eleven


    When it is desired to complete the oxygen reduction, the control means 5 will re-activate the valve means 8 related to the nitrogen supply and the methane flow rate will gradually decrease until again only nitrogen is supplied.
    5 In this described example of simultaneous feeding of two inert and reducing gases it is very important to ensure that the pressures of the two gases used are equal during the time they are being supplied simultaneously; The present gas supply system 1 allows the nitrogen pressure to be automatically adjusted with the
    10 methane pressure to achieve this goal.
    The double homogenization and reduction function requires working with different flow rates, a relatively low flow rate when inert gas is injected, and a higher flow rate when reducing gas is injected.
    Next, an additional feature of the gas supply method of the present invention will be described, referring to the auxiliary passage 64. In this case it comprises the actuation of the valve means 8 related to the auxiliary passage 64 so that gas circulates by auxiliary step 64 when determined by the control means 5
    20 that the flow and / or pressure values are lower than the predetermined flow and / or pressure values for a predetermined time. In this case, the control means 5 determine a possible obstruction of the plug 3 due to the entry of molten metal into the axial through holes 34 and allow an increase in inert gas flow from the second gas source 22 to the plug 3 eliminating any risk of obstruction of
    25 plug 3. This characteristic of the method applied with auxiliary step 64 ends when the flow rate and pressure read correspond to the predetermined parameters for a predetermined time.
    The present gas supply system 1 as exemplified
    30 in this embodiment allows a possible operation in which the control means do not act on the means for the pressure regulation 71, 72, 74 and that these can operate with predetermined values.
    The control means 5 can also receive the values from the temperature probe 35 93 and the temperature sensor 94 in the event that the gas supply system 1
    12
    image9
    权利要求:
    Claims (1)
    [1]
    image 1
    image2
    image3
    类似技术:
    公开号 | 公开日 | 专利标题
    KR20070087215A|2007-08-27|Method of melting magnesium and melting apparatus
    EP3253525B1|2020-02-12|Welding power system with integrated purge gas control
    ES2204571T3|2004-05-01|METALLURGICAL TANK WITH A BLEEDING AND METHOD DEVICE FOR CONTROLLED EXTRACTION AND WITHOUT ESCORIA OF LIQUID METAL OF THE CITED TANK.
    ES2578801A1|2016-08-01|Gas supply system for foundry ovens and related gas feed method |
    Albertsson et al.2013|Effect of low oxygen partial pressure on the chromium partition in CaO–MgO–SiO2–Cr2O3–Al2O3 synthetic slag at elevated temperatures
    CN111575443B|2021-09-14|Gas supply device and method for smelting low-carbon alloy in AOD furnace
    CN108006667A|2018-05-08|A kind of hydrogen annealing tail gas treatment system and its processing method
    US9683273B2|2017-06-20|Alloy refining methods
    BRPI0613250A2|2011-03-22|device for centralizing and tightening tubular parts comprising gas flow regulating means for controlling the oxygen content
    JP6157039B1|2017-07-05|Powder feeder
    ES2831829T3|2021-06-09|Sliding closure on the nozzle of a metallurgical vessel
    KR20130060081A|2013-06-07|Gas supply apparatus for ladle furnace
    MX2011009905A|2012-01-20|Fireproof ceramic plug.
    KR101795471B1|2017-11-10|Apparatus of alloy steel and manufacturing method using the same
    JP2017510705A|2017-04-13|Metal bath circulation method and furnace equipment
    ES2797928T3|2020-12-04|Procedure and device for keeping liquid metals in a hot state
    KR101796151B1|2017-11-10|Spent unclear fuel cooling apparatus and control method for the same
    CN104774992A|2015-07-15|Control device for converter steelmaking nitrogen-oxygen combined blowing
    US20160273065A1|2016-09-22|Process Gas Preparation Apparatus for an Industrial Furnace System and an Industrial Furnace System for Gas Carburizing and Hardening of Metal Workpieces Utilizing Same
    JP2010159444A|2010-07-22|Apparatus for preventing backflow in metallurgical lance having burner function
    KR101727816B1|2017-04-17|Tundish burner apparatus
    KR102190947B1|2020-12-14|Plasma cutting apparatus
    ES2217493T3|2004-11-01|METHOD FOR PREPARING A FLUID TO WELD WITH CONSTANT PHYSICAL-CHEMICAL CHARACTERISTICS IN TIME.
    BRPI0613251A2|2010-12-28|device for centralizing and tightening tubular parts comprising means for measuring and regulating moisture content in real time
    KR20200010924A|2020-01-31|Manufacturing method of alloy steel
    同族专利:
    公开号 | 公开日
    ES2578801B1|2017-02-13|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3947002A|1975-07-30|1976-03-30|United States Steel Corporation|Method of burning-in lining in bottom blown steelmaking furnace|
    US4395283A|1981-02-27|1983-07-26|Nippon Steel Corporation|Method of switching bottom-blown gases and apparatus therefor|
    US4539043A|1982-03-29|1985-09-03|Nippon Kokan Kabushiki Kaisha|Bottom-blown gas blowing nozzle|
    TW419576B|2000-03-04|2001-01-21|Chen Jiun Nian|An urgent troubleshooting structure for safety switch of gas furnace|
    法律状态:
    2017-02-13| FG2A| Definitive protection|Ref document number: 2578801 Country of ref document: ES Kind code of ref document: B1 Effective date: 20170213 |
    2019-01-17| PC2A| Transfer of patent|Owner name: LA FARGA YOURCOPPERSOLUTIONS, S.A. Effective date: 20190117 |
    优先权:
    申请号 | 申请日 | 专利标题
    ES201630105A|ES2578801B1|2016-01-28|2016-01-28|GAS FEEDING SYSTEM FOR FOUNDING OVENS AND RELATED GAS FEEDING METHOD|ES201630105A| ES2578801B1|2016-01-28|2016-01-28|GAS FEEDING SYSTEM FOR FOUNDING OVENS AND RELATED GAS FEEDING METHOD|
    [返回顶部]