{"id":10438,"date":"2021-09-29T09:26:28","date_gmt":"2021-09-29T09:26:28","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=10438"},"modified":"2021-09-29T09:26:28","modified_gmt":"2021-09-29T09:26:28","slug":"aluminium-melt-degassing","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/aluminium-melt-degassing\/","title":{"rendered":"Desgasificaci\u00f3n del aluminio fundido"},"content":{"rendered":"<p>El sistema de desgasificaci\u00f3n del aluminio fundido es el \u00faltimo proceso destinado a reducir el contenido de hidr\u00f3geno. Su eficiencia y su eficacia en la desgasificaci\u00f3n son muy importantes. Los equipos de desgasificaci\u00f3n en l\u00ednea utilizados en la colada continua y la laminaci\u00f3n adoptan el m\u00e9todo de desgasificaci\u00f3n con rotor giratorio.<\/p>\n<p>En el taller de fundici\u00f3n y colada, el contenido de hidr\u00f3geno y las inclusiones no met\u00e1licas de la aleaci\u00f3n de aluminio fundida afectan gravemente a la calidad de las piezas fundidas. Normalmente, durante el proceso de solidificaci\u00f3n, a medida que disminuye la solubilidad del hidr\u00f3geno, este y las inclusiones no met\u00e1licas penetran en el cristalizador, lo que provocar\u00e1 la aparici\u00f3n de manchas blancas y poros en la superficie de las chapas y l\u00e1minas durante el posterior proceso de laminaci\u00f3n. Las propiedades mec\u00e1nicas del material se ven reducidas y, finalmente, el producto acaba desech\u00e1ndose. Por lo tanto, la aleaci\u00f3n de aluminio fundida debe desgasificarse y purificarse.<\/p>\n<p>El m\u00e9todo de flotaci\u00f3n es, en la actualidad, el m\u00e1s utilizado para desgasificar y purificar el aluminio fundido. El principio consiste en introducir en el aluminio fundido un gas inerte o un gas activo insoluble en \u00e9l, o bien a\u00f1adir una sal de cloruro que reaccione con el aluminio fundido para generar un gas, lo que da lugar a la formaci\u00f3n de un gran n\u00famero de burbujas que se escapan del aluminio fundido.<\/p>\n<p>Los \u00e1tomos de hidr\u00f3geno disueltos en el aluminio fundido migran hacia la superficie de las burbujas de purificaci\u00f3n, se adsorben en la superficie de las burbujas, forman hidruros en el interior de las burbujas de hidr\u00f3geno y, finalmente, se liberan del proceso cin\u00e9tico del aluminio fundido a medida que las burbujas ascienden, completando as\u00ed la desgasificaci\u00f3n y la purificaci\u00f3n del aluminio fundido.<\/p>\n<p>El <a href=\"http:\/\/www.alalloycasting.com\/es\/rotating-rotor-degassing\/\">desgasificaci\u00f3n mediante rotor giratorio<\/a> Este m\u00e9todo permite aprovechar al m\u00e1ximo las ventajas del m\u00e9todo de flotaci\u00f3n por burbujas para la eliminaci\u00f3n de hidr\u00f3geno. La clave reside en que el l\u00edquido forma un flujo turbulento bajo la fuerte acci\u00f3n de la boquilla, y las burbujas se rompen y se dispersan uniformemente bajo la acci\u00f3n de la boquilla y del flujo turbulento.<\/p>\n<p>Dado que el m\u00e9todo de desgasificaci\u00f3n con rotor giratorio permite que el di\u00e1metro de las burbujas sea muy peque\u00f1o, el efecto de agitaci\u00f3n de las burbujas sobre la superficie del l\u00edquido se reduce considerablemente, lo que permite aumentar relativamente el caudal de aire. Para obtener una alta eficiencia de desgasificaci\u00f3n, es necesario garantizar un determinado caudal de aire. El caudal de aire suele ser el principal factor que influye en el efecto de desgasificaci\u00f3n de la flotaci\u00f3n por burbujas. En las mismas condiciones, el aumento del caudal de gas incrementar\u00e1 el \u00e1rea superficial espec\u00edfica de interacci\u00f3n entre el gas y el l\u00edquido.<\/p>\n<p>Debido al efecto de agitaci\u00f3n que produce el rotor giratorio en el interior del aluminio fundido, este se encuentra en estado de movimiento, lo que aumenta la velocidad de desplazamiento de las burbujas en el aluminio fundido, lo cual contribuye a mejorar la capacidad de transferencia de masa del aluminio fundido.<\/p>\n<p>Debido a que las burbujas no ascienden en l\u00ednea recta por el aluminio fundido, el tiempo de permanencia de las burbujas en el aluminio fundido es relativamente largo; es decir, se prolonga el tiempo de deshidrogenaci\u00f3n que producen las burbujas, lo que permite que la acci\u00f3n deshidrogenante de las burbujas se desarrolle plenamente.<\/p>\n<p>Las burbujas se distribuyen de manera uniforme en el aluminio fundido, lo que puede reducir la distancia de difusi\u00f3n de los \u00e1tomos de hidr\u00f3geno en el aluminio fundido hasta las burbujas, de modo que se potencia el proceso de difusi\u00f3n en todo el ba\u00f1o de fusi\u00f3n y se mejoran eficazmente las condiciones de transferencia de masa.<\/p>","protected":false},"excerpt":{"rendered":"<p>The aluminium melt degassing system is the last process to reduce the hydrogen content. Its degassing efficiency and degassing effect are very important. The online&hellip;<\/p>","protected":false},"author":1,"featured_media":10439,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-10438","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>Aluminium Melt Degassing for Continuous Casting and Rolling<\/title>\n<meta name=\"description\" content=\"The aluminium melt degassing system is the last process to reduce the hydrogen content. Its degassing efficiency are very important.\" \/>\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\/aluminium-melt-degassing\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Aluminium Melt Degassing for Continuous Casting and Rolling\" \/>\n<meta property=\"og:description\" content=\"The aluminium melt degassing system is the last process to reduce the hydrogen content. 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