{"id":6093,"date":"2020-10-28T09:32:19","date_gmt":"2020-10-28T09:32:19","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=6093"},"modified":"2023-12-01T03:03:06","modified_gmt":"2023-12-01T03:03:06","slug":"how-to-degas","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/how-to-degas\/","title":{"rendered":"C\u00f3mo desgasificar"},"content":{"rendered":"

El proceso de desgasificaci\u00f3n es un aspecto importante en el refinado del aluminio fundido.<\/h2>\n

Si no se elimina a tiempo el gas presente en el aluminio fundido, se formar\u00e1n poros durante la solidificaci\u00f3n, lo que afectar\u00e1 al rendimiento y al procesamiento posterior de los productos de aluminio.<\/strong><\/p>\n

Humedad: procede de los gases del horno, de la carga insuficientemente secada, del agente refinador, del agente de recubrimiento, del modificador, del revestimiento del horno insuficientemente secado, del crisol y de la pintura de las herramientas, as\u00ed como del agua residual presente en el crisol, las herramientas y la carga. El disolvente, el vapor de agua reacciona con el aluminio seg\u00fan la ecuaci\u00f3n 2Al + 3H\u2082O \u2192 Al\u2082O\u2083 + 6H, produciendo hidr\u00f3geno, que entra en el aluminio l\u00edquido en estado at\u00f3mico.<\/strong><\/p>\n

La suciedad grasa procede de la carga del horno y de las herramientas que contienen grasa. La grasa reacciona con el aluminio y genera hidr\u00f3geno.<\/strong><\/p>\n

En la carga hay productos de corrosi\u00f3n que contienen agua. Para reducir la absorci\u00f3n de gas por parte del aluminio fundido, las materias primas de la aleaci\u00f3n deben almacenarse adecuadamente para evitar la humedad. Precalentar y secar completamente antes de su uso; el crisol de fundici\u00f3n y las herramientas deben precalentarse por completo para eliminar la humedad antes de su uso. Para eliminar el gas del aluminio fundido, todo el aluminio fundido debe desgasificarse y refinarse antes de la colada.<\/strong><\/p>\n

\"C\u00f3mo<\/p>\n

\u00bfC\u00f3mo se realiza la desgasificaci\u00f3n?<\/h2>\n

Refinado de nitr\u00f3geno<\/a> M\u00e9todo (tambi\u00e9n conocido como m\u00e9todo de desgasificaci\u00f3n con gas inerte). Principio b\u00e1sico: el nitr\u00f3geno entra en el fondo del aluminio fundido a trav\u00e9s de un dispositivo de proceso espec\u00edfico. Cuando el nitr\u00f3geno asciende desde el fondo del aluminio fundido en forma de burbujas, se produce una diferencia de presi\u00f3n parcial de hidr\u00f3geno en la interfaz de contacto, y la presi\u00f3n parcial de hidr\u00f3geno en la burbuja es muy baja. Cuando la presi\u00f3n parcial de hidr\u00f3geno tiende a equilibrarse, el hidr\u00f3geno presente en el l\u00edquido de la aleaci\u00f3n entra continuamente en la burbuja. Al ascender la burbuja hasta la superficie del l\u00edquido, el hidr\u00f3geno se escapa a la atm\u00f3sfera. Mientras las burbujas ascienden, adsorben simult\u00e1neamente la escoria oxidada y sus impurezas fijas, haciendo que floten juntas hasta la superficie del l\u00edquido. El gas inerte debe condensarse y deshidratarse antes de su uso para evitar que la humedad penetre en el aluminio l\u00edquido. Si la calidad del refinado es buena, el n\u00famero de poros debe ser menor.<\/strong><\/p>\n

En cuanto a la desgasificaci\u00f3n del aluminio l\u00edquido, quiz\u00e1 te interese leer este art\u00edculo: \u201cC\u00d3MO FUNCIONA EL DESGASIFICADOR EN LA L\u00cdNEA DE FUNDICI\u00d3N DE ALUMINIO<\/a>\u201d sobre el desgasificador de aluminio.<\/strong><\/p>","protected":false},"excerpt":{"rendered":"

How to degas is an important problem for molten aluminum refining. If the gas in the aluminum liquid is not removed in time, pores will…<\/p>","protected":false},"author":1,"featured_media":6094,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[158],"class_list":["post-6093","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-aluminum-degasser"],"yoast_head":"\nHow to Degas for Molten Aluminum Refining | Degassing with Nitrogen<\/title>\n<meta name=\"description\" content=\"How to degas is an important problem for molten aluminum refining. 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