ES2578801A1 - Gas supply system for foundry ovens and related gas feed method (Machine-translation by Google Translate, not legally binding) - Google Patents
Gas supply system for foundry ovens and related gas feed method (Machine-translation by Google Translate, not legally binding) Download PDFInfo
- Publication number
- ES2578801A1 ES2578801A1 ES201630105A ES201630105A ES2578801A1 ES 2578801 A1 ES2578801 A1 ES 2578801A1 ES 201630105 A ES201630105 A ES 201630105A ES 201630105 A ES201630105 A ES 201630105A ES 2578801 A1 ES2578801 A1 ES 2578801A1
- Authority
- ES
- Spain
- Prior art keywords
- gas
- supply system
- gas supply
- foundry
- ovens
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title abstract description 6
- 239000007789 gas Substances 0.000 abstract description 26
- 239000002184 metal Substances 0.000 abstract description 10
- 229910052751 metal Inorganic materials 0.000 abstract description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 6
- 239000001301 oxygen Substances 0.000 abstract description 6
- 229910052760 oxygen Inorganic materials 0.000 abstract description 6
- 238000003723 Smelting Methods 0.000 abstract description 3
- 238000005266 casting Methods 0.000 abstract description 3
- 238000004891 communication Methods 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract description 2
- 230000007704 transition Effects 0.000 abstract description 2
- 239000003638 chemical reducing agent Substances 0.000 abstract 1
- 239000011819 refractory material Substances 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 12
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- 206010061876 Obstruction Diseases 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- -1 ferrous metals Chemical class 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 238000000265 homogenisation Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/14—Closures
- B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
- B22D41/42—Features relating to gas injection
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D21/00—Arrangement of monitoring devices; Arrangement of safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/16—Introducing a fluid jet or current into the charge
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D7/00—Forming, maintaining or circulating atmospheres in heating chambers
- F27D7/02—Supplying steam, vapour, gases or liquids
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
Sistema y método de alimentación de gas para hornos de fundición de metales, cucharas de colada u hornos de mantenimiento, comprendiendo el sistema de alimentación de gas como mínimo de un tapón realizado en material refractario, que está en comunicación fluida con una primera fuente de gas y una segunda fuente de gas a través de conducciones; comprendiendo adicionalmente un paso auxiliar a modo de baipás de conducciones; los gases procedentes de las fuentes de gas son de tipo reductor y de tipo inerte, permitiendo reducir el contenido de oxígeno del metal fundido y homogeneizar la mezcla del metal, respectivamente; el sistema y método de la presente invención permiten reducir las emisiones contaminantes de CO y CO2; además, permiten alargar la vida del tapón, al evitar las obstrucciones de metal fundido en los orificios del tapón y al garantizar una transición adecuada de un gas al otro.Gas feeding system and method for metal smelting furnaces, casting spoons or maintenance furnaces, the gas feeding system comprising at least one plug made of refractory material, which is in fluid communication with a first gas source and a second source of gas through pipes; additionally comprising an auxiliary passage as a bypass of pipes; the gases from the gas sources are reducer type 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 reducing polluting emissions of CO and CO2; In addition, they allow the life of the stopper to be lengthened, by avoiding molten metal obstructions in the holes of the stopper and by guaranteeing an adequate transition from one gas to the other.
Description
Los medios de control pueden accionar los medios para la regulación de presión cuando se determina por parte de los medios de control que el valor de presión leído diverge del valor de presión predeterminado. 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 Otras características y ventajas del sistema de alimentación de gas para hornos de fundición y el método seguido objetos de la presente invención resultarán evidentes a partir de la descripción de una realización preferida, pero no exclusiva, que se ilustra a modo de ejemplo no limitativo en los dibujos que se acompañan, en los cuales: 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:
Figura 1.-Es una vista de un esquema del sistema de alimentación de gas para hornos de fundición según la presente invención; Figura 2.-Es una vista esquemática de un corte transversal de un horno de sección circular 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 con un tapón según la invención; Figura 3.-Es una vista esquemática un corte transversal de un horno de sección rectangular con un tapón del sistema según la invención; Figura 4.-Es una vista esquemática de un tapón del sistema según la invención; y Figura 5.-Es un diagrama que relaciona la cantidad de oxígeno en ppm presente en el metal 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 fundido a lo largo del tiempo y el caudal de gas reductor suministrado por el sistema de la presente invención al metal fundido. 20 fused over time and the flow rate of reducing gas supplied by the system of the present invention to the molten metal.
DESCRIPCIÓN DE UNA REALIZACIÓN PREFERENTE DESCRIPTION OF A PREFERRED EMBODIMENT
25 Tal como se muestra en las figuras adjuntas se muestran un ejemplo de realización preferente de la presente invención que en ningún caso debe entenderse como exclusiva. En dichas figuras se han representado elementos no visibles con líneas discontinuas. 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.
En la figura 1 se ilustra un esquema del presente sistema de alimentación de gas 1 para A diagram of the present gas supply system 1 for
30 hornos de fundición de metales, cucharas de colada, u hornos de mantenimiento que pueden ser de cualquier tipo pero de forma preferida se emplea en un horno 4, y preferentemente para la fundición de metales no ferrosos, tal como el cobre, y más preferente para el refino de cobre partiendo de chatarra de cobre con un contenido en cobre mayor o igual al 90%. Continuando con el horno 4, comprende preferentemente un 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 contenedor o vaso como se muestra en las figuras 2 y 3. 35 container or vessel as shown in figures 2 and 3.
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podrían estar dispuestos en cualquier otro punto de la comunicación fluida entre la segunda fuente de alimentación 22 y el tapón 3, como por ejemplo en la conducción 62. La lectura de los valores de caudal y presión se envían a los medios de control 5 donde se comparan con los parámetros de funcionamiento predeterminado. En función de los resultados de la comparación los medios de control 5 pueden abrir más los medios de válvula 8 o los medios para la regulación de presión 72 hasta que las lecturas recibidas desde los medios detectores 91 corresponden a los parámetros prefijados. Esta operación continuará hasta que el usuario lo desee o hasta que el propio sistema decida en función de las instrucciones prefijadas por ejemplo en cuanto a duración. 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.
De manera paralela se puede describir la operación para alimentar el tapón 3 con metano para reducir la cantidad de oxígeno en la colada de cobre de refino. En este caso los medios de control accionarán los medios de válvula dispuestos entre la primera fuente de gas 21 y el tapón 3, y a continuación comparará los valores de presión y/o de caudal leído por los medios detectores 91 de manera que si divergen de los parámetros prefijados los medios de control pueden accionar adicionalmente los medios de válvula 8 o incluso los medios para la regulación de presión 71. 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 continuación se describe un caso en el que se suministran gases provenientes simultáneamente de dos fuentes de gas 21, 22. A case is described below in which gases are supplied simultaneously from two gas sources 21, 22.
Suponiendo que el sistema está alimentando nitrógeno a través de la conducción 62 hacia el tapón 3 y el usuario o los medios de control 5 autónomamente ordenan la inyección de metano para reducir oxígeno, los medios de control 5 accionarán los medios de válvula 8 vinculados a la primera fuente de gas 21 y la conducción 61 de manera que se suministra metano y nitrógeno de forma simultánea a través del tapón 3. Los medios detectores 91 medirán el caudal y/o la presión de la mezcla de gases y los compararán con los parámetros prefijados, de manera que si divergen los medios de control 5 puedan actuar sobre los medios de válvula 8 repartidos por el sistema de alimentación de gas 1 o incluso sobre los medios para la regulación de presión 71, 72 hasta que no hay una divergencia significativa con los parámetros prefijados. A continuación los medios de control 5 pueden ordenar el cierre de los medios de válvula 8 relacionados con el suministro de nitrógeno para que de esa forma el tapón solo pueda alimentar metano a la colada de cobre y por tanto solo se estará reduciendo el oxígeno del metal fundido. La transición se hará de forma controlada en el tiempo. 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.
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Cuando se desee finalizar la reducción del oxígeno, los medios de control 5 volverán a accionar los medios de válvula 8 relacionados con el suministro de nitrógeno y poco a poco irá disminuyendo el caudal de metano hasta que de nuevo solo se suministre nitrógeno. 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 En este ejemplo descrito de alimentación simultánea de dos gases inerte y reductor es muy importante asegurar que las presiones de los dos gases empleados sean iguales durante el tiempo en que se están suministrando simultáneamente; el presente sistema de alimentación de gas 1 permite ajustar automáticamente la presión del nitrógeno con la 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 presión del metano para lograr este objetivo. 10 methane pressure to achieve this goal.
La doble función de homogeneización y reducción, requiere trabajar con diferentes caudales, un caudal relativamente bajo cuando se inyecta gas inerte, y un mayor caudal cuando se inyecta gas reductor. 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.
15 A continuación se va a describir una característica adicional del método de alimentación de gas de la presente invención, referida al paso auxiliar 64. En este caso comprende el accionamiento de los medios de válvula 8 relacionados con el paso auxiliar 64 de forma que circule gas por el paso auxiliar 64 cuando se determina por parte de los medios de control 5 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 que los valores de caudal y/o presión son inferiores a los valores de caudal y/o presión predeterminados durante un tiempo predeterminado. En este caso los medios de control 5 determinan una posible obstrucción del tapón 3 debido a la entrada de metal fundido en los orificios pasantes axiales 34 y permiten un aumento de caudal del gas inerte desde la segunda fuente de gas 22 hasta el tapón 3 eliminando cualquier riesgo de obstrucción del 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 tapón 3. Esta característica del método aplicada con el paso auxiliar 64 finaliza cuando el caudal y la presión leídos corresponden durante un tiempo predeterminado a los parámetros prefijados. 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.
El presente sistema de alimentación de gas 1 tal y como está planteado de forma ejemplar The present gas supply system 1 as exemplified
30 en esta realización permite un posible funcionamiento en el que no actúen los medios de control sobre los medios para para la regulación de presión 71, 72, 74 y que éstos puedan funcionar con unos valores prefijados. 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.
Los medios de control 5 pueden recibir además los valores desde la sonda de temperatura 35 93 y el sensor de temperatura 94 en el caso de que el sistema de alimentación de gas 1 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
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Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES201630105A ES2578801B1 (en) | 2016-01-28 | 2016-01-28 | GAS FEEDING SYSTEM FOR FOUNDING OVENS AND RELATED GAS FEEDING METHOD |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES201630105A ES2578801B1 (en) | 2016-01-28 | 2016-01-28 | GAS FEEDING SYSTEM FOR FOUNDING OVENS AND RELATED GAS FEEDING METHOD |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| ES2578801A1 true ES2578801A1 (en) | 2016-08-01 |
| ES2578801B1 ES2578801B1 (en) | 2017-02-13 |
Family
ID=56507922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES201630105A Active ES2578801B1 (en) | 2016-01-28 | 2016-01-28 | GAS FEEDING SYSTEM FOR FOUNDING OVENS AND RELATED GAS FEEDING METHOD |
Country Status (1)
| Country | Link |
|---|---|
| ES (1) | ES2578801B1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3947002A (en) * | 1975-07-30 | 1976-03-30 | United States Steel Corporation | Method of burning-in lining in bottom blown steelmaking furnace |
| US4395283A (en) * | 1981-02-27 | 1983-07-26 | Nippon Steel Corporation | Method of switching bottom-blown gases and apparatus therefor |
| US4539043A (en) * | 1982-03-29 | 1985-09-03 | Nippon Kokan Kabushiki Kaisha | Bottom-blown gas blowing nozzle |
| TW419576B (en) * | 2000-03-04 | 2001-01-21 | Chen Jiun Nian | An urgent troubleshooting structure for safety switch of gas furnace |
-
2016
- 2016-01-28 ES ES201630105A patent/ES2578801B1/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3947002A (en) * | 1975-07-30 | 1976-03-30 | United States Steel Corporation | Method of burning-in lining in bottom blown steelmaking furnace |
| US4395283A (en) * | 1981-02-27 | 1983-07-26 | Nippon Steel Corporation | Method of switching bottom-blown gases and apparatus therefor |
| US4539043A (en) * | 1982-03-29 | 1985-09-03 | Nippon Kokan Kabushiki Kaisha | Bottom-blown gas blowing nozzle |
| TW419576B (en) * | 2000-03-04 | 2001-01-21 | Chen Jiun Nian | An urgent troubleshooting structure for safety switch of gas furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2578801B1 (en) | 2017-02-13 |
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