{"id":7035,"date":"2020-12-16T05:55:27","date_gmt":"2020-12-16T05:55:27","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=7035"},"modified":"2020-12-16T05:55:27","modified_gmt":"2020-12-16T05:55:27","slug":"online-degassing-molten-metal","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/online-degassing-molten-metal\/","title":{"rendered":"Desgasificaci\u00f3n en l\u00ednea del metal fundido"},"content":{"rendered":"<p>La desgasificaci\u00f3n en l\u00ednea del metal fundido se lleva a cabo normalmente inyectando gas inerte que contiene un determinado porcentaje de cloro (Cl\u2082) gaseoso. El cloro forma peque\u00f1as burbujas en el metal fundido. La desgasificaci\u00f3n suele realizarse en un proceso continuo antes de la colada, que a su vez puede llevarse a cabo de forma continua. Se inyecta una mezcla de gas inerte y Cl\u2082 (cloro) en el metal fundido para tratarlo mientras fluye desde el horno hasta la cubeta de colada. Aunque solo el gas inerte puede eliminar eficazmente el H\u2082 (hidr\u00f3geno) disuelto mediante transferencia de masa, es necesario eliminar las impurezas de metales alcalinos y alcalinot\u00e9rreos (como el sodio (Na), el litio (Li) y el calcio (Ca)) presentes en el metal fundido mediante reactivos qu\u00edmicos, como el Cl\u2082.<\/p>\n<p>El cloro (Cl\u2082) tambi\u00e9n puede facilitar la flotaci\u00f3n y la eliminaci\u00f3n de inclusiones no met\u00e1licas, mejorando as\u00ed la pureza del metal fundido.<\/p>\n<p>Sin embargo, el uso de Cl\u2082 gaseoso plantea problemas medioambientales y de higiene industrial. El cloro gaseoso es tambi\u00e9n una fuente de emisiones atmosf\u00e9ricas reguladas. Adem\u00e1s, debido a los peligros que entra\u00f1a el Cl\u2082, los requisitos en materia de almacenamiento, tuber\u00edas, seguridad y formaci\u00f3n pueden ser igualmente estrictos. Por otra parte, el Cl\u2082 aumenta la corrosi\u00f3n y el desgaste de otros equipos de la f\u00e1brica. Por lo tanto, puede ser conveniente eliminar los metales alcalinos y alcalinot\u00e9rreos del aluminio fundido y sus aleaciones en l\u00ednea sin utilizar Cl\u2082.<\/p>\n<p>Para lograr una desgasificaci\u00f3n eficaz, todos los <a href=\"http:\/\/www.alalloycasting.com\/es\/degassing-equipment\/\">equipos de desgasificaci\u00f3n<\/a> Debe suministrar una cantidad m\u00ednima determinada de gas por kilogramo de metal. La desgasificaci\u00f3n en l\u00ednea del metal fundido puede llevarse a cabo en un desgasificador tipo canal o tipo caja profunda. En el desgasificador tipo canal, el tiempo de permanencia del metal en la zona donde se suministra el gas es mucho menor que en el desgasificador tipo caja profunda. Cada eyector rotativo debe suministrar una gran cantidad de gas y tener una capacidad de suministro adecuada. La cantidad de gas determina la eficacia del dise\u00f1o del eyector.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6950\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/12\/Online-Degassing-Equipments.jpg\" alt=\"Equipos de desgasificaci\u00f3n en l\u00ednea\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/12\/Online-Degassing-Equipments.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/12\/Online-Degassing-Equipments-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p>Se ha observado que, en un desgasificador en forma de canal con un rotor de gas, este puede suministrar una cantidad adecuada de gas al metal fundido, pero el gas tiende a liberarse del rotor de forma irregular, lo que provoca salpicaduras en la superficie del metal fundido y una falta de eficiencia. Algunos desgasificadores de canal utilizan varios eyectores de gas rotativos relativamente peque\u00f1os a lo largo de la secci\u00f3n del canal para lograr el efecto de un reactor de flujo continuo o de \u201ctap\u00f3n\u201d pseudo, en lugar de un reactor de flujo totalmente mezclado o un reactor de tanque con agitaci\u00f3n continua; esta es la caracter\u00edstica del desgasificador de caja profunda. En un reactor de flujo en tap\u00f3n ideal, no hay mezcla, y las part\u00edculas del fluido salen en el mismo orden en que llegan.<\/p>\n<p>Sin embargo, un desgasificador tipo canal con m\u00faltiples eyectores de gas rotativos peque\u00f1os no puede introducir una gran cantidad de gas en forma de burbujas finas en el metal fundido sin que se produzcan irregularidades evidentes en el flujo de gas, por lo que no es adecuado para aplicaciones en las que se requieran burbujas finas. La forma de suministro de gas a gran escala. Cuando se utiliza cloro como agente desgasificador, un desgasificador de caja profunda resulta m\u00e1s eficaz que uno en forma de canal para eliminar el hidr\u00f3geno y las inclusiones del metal fundido. Cuando se utiliza fundente salino en lugar de cloro, cabe esperar el mismo resultado. Por lo tanto, debe utilizarse un desgasificador de caja profunda para reducir las salpicaduras en la superficie del metal fundido y maximizar la eficiencia de eliminaci\u00f3n de los gases disueltos y las inclusiones.<\/p>","protected":false},"excerpt":{"rendered":"<p>Online degassing molten metal is usually accomplished by blowing in inert gas containing a certain percentage of chlorine (Cl2) gas. Chlorine forms small bubbles in&hellip;<\/p>","protected":false},"author":1,"featured_media":7036,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-7035","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Online Degassing Molten Metal by Blowing Inert Gas<\/title>\n<meta name=\"description\" content=\"Online degassing molten metal is usually accomplished by blowing in inert gas containing a certain percentage of chlorine (Cl2) gas.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.alalloycasting.com\/es\/online-degassing-molten-metal\/\" \/>\n<meta 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