m\u00e1quinas de desgasificaci\u00f3n rotativas<\/a>\u00a0ofrecer un m\u00e9todo m\u00e1s eficaz y limpio para eliminar el hidr\u00f3geno del aluminio fundido. El hidr\u00f3geno disuelto en el aluminio fundido se difunde entonces hacia estas burbujas y se separa de la fase l\u00edquida.<\/p>\nEl aluminio fundido, antes de la colada, contiene hidr\u00f3geno disuelto e inclusiones no met\u00e1licas, como \u00f3xidos de aluminio y magnesio, que son impurezas indeseables. Cuando hay hidr\u00f3geno e inclusiones no met\u00e1licas en el aluminio fundido, pueden producirse defectos en los lingotes obtenidos a partir de la masa fundida y en los productos fabricados a partir de dichos lingotes. Por lo tanto, es necesario eliminar el hidr\u00f3geno y las inclusiones no met\u00e1licas del metal fundido.<\/p>\n
Por lo general, se introduce gas inerte o cloro gaseoso en el metal fundido en forma de burbujas para eliminar el hidr\u00f3geno y las inclusiones no met\u00e1licas del aluminio fundido. Sin embargo, dado que la atm\u00f3sfera contiene agua, el aluminio y el agua de la atm\u00f3sfera reaccionan en la superficie del metal fundido (2Al + 3H\u2082O \u2192 3Al\u2082O\u2083 + 3H\u2082), lo que da lugar al problema de la penetraci\u00f3n de hidr\u00f3geno en la masa fundida. La superficie del aluminio fundido que se deja reposar suele cubrirse con una densa capa de \u00f3xido de aluminio, de modo que el agua atmosf\u00e9rica no reaccione con el aluminio.<\/p>\n
El principio de funcionamiento del equipo de desgasificaci\u00f3n rotativa en l\u00ednea para aluminio fundido se basa en el principio de flotaci\u00f3n por gas. El gas de proceso (gas inerte o una mezcla de gas inerte y cloro) se inyecta en la masa fundida a trav\u00e9s del rotor, donde se fragmenta en diminutas burbujas uniformemente dispersas que ascienden por la masa fundida. El hidr\u00f3geno es absorbido por las burbujas y eliminado, y las inclusiones son capturadas por las burbujas, que a continuaci\u00f3n ascienden hasta la superficie del fundido.<\/p>","protected":false},"excerpt":{"rendered":"
Degassing of molten aluminum is an essential process in alloy casting. It is done by one of two methods: flux or rotary degassing. The molten…<\/p>","protected":false},"author":1,"featured_media":6947,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-6943","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\n
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