{"id":9958,"date":"2021-08-18T06:41:57","date_gmt":"2021-08-18T06:41:57","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=9958"},"modified":"2021-08-18T06:41:57","modified_gmt":"2021-08-18T06:41:57","slug":"control-of-smelting-process","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/control-of-smelting-process\/","title":{"rendered":"Control del proceso de fundici\u00f3n"},"content":{"rendered":"

Para eliminar las escorias y los gases del metal fundido, adem\u00e1s del uso de equipos de refinado con fundente y de filtraci\u00f3n para la desgasificaci\u00f3n con fines de purificaci\u00f3n, no se puede pasar por alto el control del proceso de fundici\u00f3n.<\/p>\n

Control del proceso de fundici\u00f3n del aluminio<\/strong><\/p>\n

En primer lugar, elige materias primas secas (incluidas agentes refinadores<\/a>) que contengan menos escoria. Todos los materiales y herramientas del horno deben limpiarse de marcas de oxidaci\u00f3n, suciedad, humedad, aceite, etc., antes de introducirlos en el horno, y deben precalentarse y secarse.<\/p>\n

En segundo lugar, es necesario reducir la temperatura de fusi\u00f3n al m\u00ednimo posible y acortar el tiempo de mantenimiento del metal fundido. Cuando la temperatura de fusi\u00f3n o de colada es demasiado alta, es probable que se produzca la oxidaci\u00f3n del metal, y el contenido de gas del metal fundido tambi\u00e9n aumentar\u00e1, lo que dar\u00e1 lugar a inclusiones de escoria y defectos por poros en el lingote. Sin embargo, cuando la temperatura de colada es demasiado baja, dado que la escoria y el gas precipitado en el material fundido no tendr\u00e1n tiempo de salir a la superficie, tambi\u00e9n se producir\u00e1n inclusiones de escoria y poros.<\/p>\n

La solubilidad del hidr\u00f3geno en el aluminio y las aleaciones de aluminio aumenta al aumentar la temperatura. Por lo tanto, siempre que se cumplan los requisitos de refinado y la temperatura de fundici\u00f3n, se debe optar por un funcionamiento a baja temperatura en la medida de lo posible para evitar el sobrecalentamiento de la masa fundida y el mantenimiento prolongado del calor. Una vez refinado el metal fundido en el horno, si el tiempo de mantenimiento supera las 4 h y no es posible pasar al siguiente proceso para continuar la producci\u00f3n, deber\u00e1 refinarse de nuevo. En el caso de un horno est\u00e1tico, cada vez que se realice el refinado, es necesario mantener el horno limpio y eliminar a tiempo los residuos de escoria del interior del mismo.<\/p>\n

\"M\u00e9todo<\/p>\n

Mediante el tratamiento de purificaci\u00f3n previo al horno y el control del proceso de fundici\u00f3n, es posible eliminar una gran cantidad de inclusiones y gases, reducir significativamente el contenido de escoria en el aluminio l\u00edquido y reducir el contenido de metales alcalinos \u2014como Na, Mg, Li y Ca\u2014 y de metales alcalinot\u00e9rreos. De este modo, se reduce al m\u00ednimo el contenido de estos elementos, mejorando as\u00ed la pureza y la limpieza de la masa fundida.<\/p>\n

Tras la medici\u00f3n y el an\u00e1lisis, la fracci\u00f3n m\u00e1sica de Na en el aluminio primario electrol\u00edtico producido por la c\u00e9lula electrol\u00edtica de aluminio precalentada es, por lo general, de aproximadamente (80-150) x 10\u207b\u2076, y el contenido de Na tras m\u00faltiples tratamientos de purificaci\u00f3n suele situarse en torno a (1-3) x 10\u207b\u2076, lo que permite cumplir plenamente los requisitos del laminado. El contenido de hidr\u00f3geno en el aluminio fundido tambi\u00e9n puede controlarse de forma eficaz. En lo que respecta al proceso de producci\u00f3n de chapas laminadas en caliente, el contenido de hidr\u00f3geno a la salida del horno de reposo es de 0,25 ~ 0,35 mL\/100 g de Al, y a la salida de la caja de desgasificaci\u00f3n rotativa en l\u00ednea es de 0,18 - 0,22 mL\/100 g de Al. A la salida de la equipos de filtrado con espuma cer\u00e1mica<\/a> es de 0,12-0,15 ml\/100 g de aluminio.<\/p>","protected":false},"excerpt":{"rendered":"

In order to remove the slag and gas in the melt, in addition to the use of flux refining and degassing filtration equipment for purification,…<\/p>","protected":false},"author":1,"featured_media":9959,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[12379,12376,12377,12378,833,12380],"class_list":["post-9958","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-ceramic-foam-filter-equipment","tag-control-of-smelting-process","tag-molten-aluminum","tag-purification-treatment","tag-refining-agent","tag-rotary-degassing-box"],"yoast_head":"\nControl of Smelting Process, Molten Aluminum Purification Treatment<\/title>\n<meta name=\"description\" content=\"in addition to the flux refining and degassing filtration equipment for purification, the control of smelting process cannot be ignored.\" \/>\n<meta name=\"robots\" content=\"index, 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