P\u00e9rdida en la fundici\u00f3n de aluminio<\/a> Es el t\u00e9rmino general que designa el metal y la aleaci\u00f3n de aluminio que se pierden durante el proceso de fundici\u00f3n debido a la oxidaci\u00f3n, la volatilizaci\u00f3n y la p\u00e9rdida de metal no recuperable provocadas por la interacci\u00f3n con la pared del horno y el agente de refinado.<\/p>\nLa principal manifestaci\u00f3n externa de la p\u00e9rdida de fundici\u00f3n puede dividirse en dos partes: una es en forma de ceniza de aluminio puro, y la otra es en forma de aluminio a granel, aluminio defectuoso y escoria de aluminio.<\/p>\n
El principio de la combusti\u00f3n oxidativa del aluminio se puede comprender mejor mediante las siguientes ecuaciones qu\u00edmicas.<\/p>\n
En el intervalo de temperaturas de fusi\u00f3n, el aluminio presenta una gran afinidad por el ox\u00edgeno y se oxida con facilidad. Tras la oxidaci\u00f3n, se forma en la superficie una pel\u00edcula de Al\u2082O\u2083 y, cuando la temperatura supera los 500 \u00b0C, se trata de r-Al\u2082O\u2083 metaestable.
\nDurante la transici\u00f3n de la pel\u00edcula de \u00f3xido metaestable a la pel\u00edcula de \u00f3xido estable, se produce una contracci\u00f3n volum\u00e9trica, as\u00ed como una mayor oxidaci\u00f3n y la aparici\u00f3n de grietas.
\nA medida que aumenta la temperatura del aluminio fundido y transcurre el tiempo, la pel\u00edcula de \u00f3xido crece m\u00e1s r\u00e1pidamente, y tanto la cantidad como el espesor de la oxidaci\u00f3n aumentan de forma significativa.<\/p>\n
Los factores que influyen en la p\u00e9rdida de fundici\u00f3n son:
\n1) Temperatura del aluminio l\u00edquido.
\n2) La fuerza de contacto entre el aluminio l\u00edquido y el ox\u00edgeno.
\n3) Contenido de aluminio en la escoria de aluminio.
\n4) El aluminio l\u00edquido expulsado por la escoria.
\n5) \u00bfCu\u00e1nto cuesta el aluminio defectuoso y el aluminio a granel?.
\n6) Otras p\u00e9rdidas<\/p>\n
\u00bfC\u00f3mo reducir las p\u00e9rdidas en la fundici\u00f3n de aluminio?<\/p>\n
Reducir la fuerza de contacto entre el aluminio l\u00edquido y el aire. Cuanto mayor sea la fuerza de contacto entre el aluminio l\u00edquido y el ox\u00edgeno, m\u00e1s grave ser\u00e1 la p\u00e9rdida por oxidaci\u00f3n y mayor ser\u00e1 la p\u00e9rdida en la fundici\u00f3n.<\/p>","protected":false},"excerpt":{"rendered":"
Aluminum Foundry Casting converts liquid aluminum into finished products and semi-finished products of aluminum ingots, bars or other shapes through processes such as batching, stirring,…<\/p>","protected":false},"author":1,"featured_media":8140,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-8139","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\n
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