{"id":2916,"date":"2020-07-18T04:00:36","date_gmt":"2020-07-18T04:00:36","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=2916"},"modified":"2020-10-19T05:53:42","modified_gmt":"2020-10-19T05:53:42","slug":"refining-process-of-molten-aluminum","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/refining-process-of-molten-aluminum\/","title":{"rendered":"Proceso de refinado del aluminio fundido"},"content":{"rendered":"

Una vez finalizado el ajuste de la composici\u00f3n del metal fundido, el siguiente paso es el proceso de refinado del aluminio fundido. El objetivo del refinado de las aleaciones de aluminio es obtener un l\u00edquido de aleaci\u00f3n de alta pureza y bajo contenido en gases, tras aplicar medidas de desgasificaci\u00f3n y eliminaci\u00f3n de impurezas. Existen varios m\u00e9todos de refinado:<\/p>\n

A\u00f1adir cloruro (ZnCl\u2082, MnCl\u2082, AlCl\u2083, C\u2082Cl\u2086, TiCl\u2084, etc.); m\u00e9todo de aireaci\u00f3n (con N\u2082, Cl\u2082 o una mezcla de N\u2082 y Cl\u2082); m\u00e9todo de tratamiento al vac\u00edo; a\u00f1adir sustancias no t\u00f3xicas agente refinador<\/a> m\u00e9todo: tratamiento por ultrasonidos.<\/p>\n

Seg\u00fan su principio, el proceso de refinado tiene dos funciones: para disolver el hidr\u00f3geno, se basa principalmente en el efecto de difusi\u00f3n para eliminar el hidr\u00f3geno del aluminio l\u00edquido; en cuanto a las inclusiones de \u00f3xido, estas se eliminan principalmente mediante la adsorci\u00f3n en la superficie del medio, como el fundente o las burbujas.<\/p>\n

Proceso de refinado del aluminio fundido<\/h2>\n

Por lo general, para la desgasificaci\u00f3n se utiliza el m\u00e9todo de flotaci\u00f3n. El principio de funcionamiento de la unidad de desgasificaci\u00f3n en l\u00ednea de AdTech consiste en introducir un gas que no contiene hidr\u00f3geno en el aluminio fundido para generar burbujas. Estas burbujas sirven para extraer el hidr\u00f3geno disuelto del aluminio fundido durante el proceso de ascenso y liberarlo a la atm\u00f3sfera. Para obtener un mejor efecto de refinado, el tubo de hierro por el que se introduce el gas debe introducirse lo m\u00e1s profundamente posible en el ba\u00f1o de fundido. El extremo inferior del tubo de hierro se sit\u00faa a una distancia de entre 100 mm y 150 mm del fondo del crisol, con el fin de alargar la trayectoria de las burbujas flotantes y, al mismo tiempo, evitar que se hundan y remuevan las inclusiones del fondo del aluminio fundido.<\/p>\n

\"Proceso<\/p>\n

Cuando se introduce el gas, el tubo de hierro debe moverse lentamente de lado a lado dentro del aluminio fundido para permitir que las burbujas atraviesen el ba\u00f1o de fusi\u00f3n. Se debe utilizar la presi\u00f3n y la velocidad de aireaci\u00f3n m\u00e1s bajas posibles, ya que las burbujas que se forman de esta manera son m\u00e1s peque\u00f1as, lo que aumenta su superficie; y, al ser peque\u00f1as, su velocidad de flotaci\u00f3n tambi\u00e9n es menor, por lo que se pueden eliminar m\u00e1s inclusiones y gases.<\/p>\n

Al mismo tiempo, para garantizar un buen efecto de refinado, la temperatura de refinado debe seleccionarse adecuadamente. Si la temperatura es demasiado alta, las burbujas generadas son m\u00e1s grandes y flotan r\u00e1pidamente, lo que empeora el efecto de refinado. Cuando la temperatura es demasiado baja, la viscosidad del aluminio fundido es elevada, lo que no favorece la salida del gas presente en el aluminio fundido y tambi\u00e9n reduce el efecto de refinado.<\/p>\n

El tratamiento ultras\u00f3nico del aluminio fundido tambi\u00e9n permite desgasificarlo de forma eficaz. Su principio se basa en que, al introducir ondas el\u00e1sticas en el aluminio fundido, se produce el fen\u00f3meno de la formaci\u00f3n de \u201chuecos\u201d en el mismo, lo que rompe la continuidad de su estructura y genera innumerables huecos microsc\u00f3picos de vac\u00edo que se disuelven en el aluminio fundido. El hidr\u00f3geno se escapa r\u00e1pidamente hacia estas cavidades para convertirse en el n\u00facleo de la burbuja y sigue creciendo desde el aluminio l\u00edquido en forma de burbuja, con lo que se consigue el efecto de refinado.<\/p>","protected":false},"excerpt":{"rendered":"

After the adjustment of the molten metal composition is completed, the next step is the refining process of molten aluminum. The purpose of aluminum alloy…<\/p>","protected":false},"author":1,"featured_media":5752,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[138],"tags":[19,1471],"class_list":["post-2916","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-seo","tag-degassing-unit","tag-refining-process-of-molten-aluminum"],"yoast_head":"\nRefining Process of Molten Aluminum,Degassing Unit<\/title>\n<meta name=\"description\" content=\"After the adjustment of the molten metal composition is completed, the next step is the refining process of molten aluminum.\" \/>\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\/refining-process-of-molten-aluminum\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" 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