{"id":10655,"date":"2021-10-18T08:58:54","date_gmt":"2021-10-18T08:58:54","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=10655"},"modified":"2021-10-18T08:58:54","modified_gmt":"2021-10-18T08:58:54","slug":"online-refining-filtration","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/online-refining-filtration\/","title":{"rendered":"Refinado y filtraci\u00f3n en l\u00ednea"},"content":{"rendered":"

Tras el refinado en el horno est\u00e1tico, hay que esperar 30 minutos; las burbujas generadas por el refinado en la masa fundida transportan el hidr\u00f3geno que se difunde en ellas, y la escoria oxidada adherida a la superficie durante la fase de ascenso de las burbujas desborda la superficie del l\u00edquido, lo que suele ser necesario para los productos de baja calidad. Cuando se a\u00f1ade el modificador en el proceso de fundici\u00f3n, se puede pasar al proceso de colada. Sin embargo, para los productos de alta gama, se requieren el refinado en l\u00ednea y la filtraci\u00f3n en l\u00ednea para purificar a\u00fan m\u00e1s el ba\u00f1o de fundici\u00f3n. Al mismo tiempo, lo m\u00e1s recomendable es utilizar el m\u00e9todo de modificaci\u00f3n en l\u00ednea, de modo que el modificador se a\u00f1ada unos 15 minutos antes de la colada y, a continuaci\u00f3n, se pase al proceso de colada.<\/p>\n

Sabemos que el proceso de fundici\u00f3n y laminaci\u00f3n es una operaci\u00f3n continua. Una vez puesto en marcha, puede funcionar de forma ininterrumpida durante varios d\u00edas o m\u00e1s de una semana. Sin embargo, la eficiencia productiva de la fundici\u00f3n y la laminaci\u00f3n es baja. Por lo general, el aluminio fundido que pasa por el dispositivo de desgasificaci\u00f3n y filtraci\u00f3n en l\u00ednea es inferior a 2 t por hora, por lo que la capacidad de la dispositivo de procesamiento en l\u00ednea<\/a> para la fundici\u00f3n y la laminaci\u00f3n no debe ser demasiado grande.<\/p>\n

Si la capacidad es demasiado grande, el aluminio l\u00edquido permanece en el dep\u00f3sito de refinado y el Caja de filtro CFF<\/a> desde hace mucho tiempo. Por un lado, se aumenta la inversi\u00f3n en equipamiento, se prolonga el tiempo de procesamiento y se desperdician recursos y energ\u00eda; por otro, se ve afectada la calidad del producto, especialmente cuando el tiempo de retenci\u00f3n del aluminio fundido en la caja de filtrado supera la mitad. Durante m\u00e1s de horas, el contenido de aire del aluminio fundido tras la filtraci\u00f3n de refinado en l\u00ednea se ha reducido considerablemente, y la probabilidad y la velocidad de reacci\u00f3n con la atm\u00f3sfera ambiental han aumentado, lo que provoca que el contenido de aire vuelva a subir. La pr\u00e1ctica demuestra que, si el tiempo de residencia supera los 40 min, el contenido de gas del fundido aumenta en aproximadamente 0,01 m\/ (100 g de Al).<\/p>\n

\"\"<\/p>\n

En lo que respecta a la fundici\u00f3n, m\u00e1s de 90% de aleaci\u00f3n de aluminio se fabrican mediante fundici\u00f3n vertical semicontinua. La capacidad m\u00e1xima de cada fundici\u00f3n: la producci\u00f3n de tubos, barras y perfiles de tama\u00f1o peque\u00f1o y mediano es de unas 15 t. La producci\u00f3n de tubos, barras y perfiles de gran tama\u00f1o es de unas 35.<\/p>\n

Por razones de simplicidad, tomaremos como ejemplo un volumen de fundici\u00f3n de 15 t por lote. El tiempo necesario para fundir un lote var\u00eda en funci\u00f3n de las diferentes series de aleaciones, los m\u00e9todos de fundici\u00f3n y los di\u00e1metros de los lingotes de fundici\u00f3n.<\/p>\n

En el caso de las especificaciones medias de las aleaciones blandas, dado que el intervalo de cristalizaci\u00f3n es reducido \u2014por lo general, entre 40 y 70 \u2103\u2014, una tanda de fundici\u00f3n (con una longitud de fundici\u00f3n de 6-8 m) dura aproximadamente entre 1 y 1,5 h. El intervalo de cristalizaci\u00f3n de la aleaci\u00f3n dura 2024 es de 136 \u2103, mientras que el de la aleaci\u00f3n 7075 alcanza los 158 \u2103, por lo que el intervalo de cristalizaci\u00f3n es mayor. En las mismas condiciones, el tiempo de fundici\u00f3n se prolongar\u00e1 naturalmente hasta unas 3 h.<\/p>","protected":false},"excerpt":{"rendered":"

After refining in the static furnace, wait for 30 minutes, the bubbles generated by the refining in the melt, carry the hydrogen that diffuses into…<\/p>","protected":false},"author":1,"featured_media":10656,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-10655","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nOnline Refining Filtration with Degassing and CFF Filtering System<\/title>\n<meta name=\"description\" content=\"For high-end products, online refining filtration is required to further purify the melt. 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