{"id":12314,"date":"2022-01-18T06:15:17","date_gmt":"2022-01-18T06:15:17","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=12314"},"modified":"2022-01-18T06:15:17","modified_gmt":"2022-01-18T06:15:17","slug":"online-degassing-unit","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/online-degassing-unit\/","title":{"rendered":"Unidad de desgasificaci\u00f3n en l\u00ednea"},"content":{"rendered":"

La unidad de desgasificaci\u00f3n en l\u00ednea suele constar de dos partes: un dispositivo de desgasificaci\u00f3n y un dispositivo de calentamiento. El dispositivo de desgasificaci\u00f3n utiliza un rotor de grafito para transportar N\u2082 al interior del aluminio fundido en la c\u00e1mara de desgasificaci\u00f3n, con el fin de eliminar el H\u2082 contenido en el aluminio fundido. A continuaci\u00f3n, la velocidad del rotor de grafito se controla ajustando la velocidad del motor paso a paso. El dispositivo de calentamiento suele utilizar un elemento calefactor el\u00e9ctrico para generar calor y mantener la temperatura del aluminio fundido dentro del rango requerido. En particular, cuando la temperatura del aluminio fundido es demasiado baja, se eleva dicha temperatura. La subida y bajada de la caja de desgasificaci\u00f3n se realizan mediante un sistema de elevaci\u00f3n de estructura mec\u00e1nica o de transmisi\u00f3n hidr\u00e1ulica.<\/p>\n

La unidad de desgasificaci\u00f3n en l\u00ednea garantiza un funcionamiento estable mediante la modificaci\u00f3n del modo de transmisi\u00f3n de potencia del rotor, lo que permite que este gire a alta velocidad y, de este modo, elimine el hidr\u00f3geno del aluminio fundido.<\/p>\n

Actualmente, las velocidades del rotor suelen oscilar entre 300 y 450 rpm, con un m\u00e1ximo de 600 rpm. Tras sustituir la caja de cambios inferior, se ha acortado la longitud del eje de transmisi\u00f3n y del eje giratorio, se ha aumentado la rigidez del eje de transmisi\u00f3n y se ha reducido la oscilaci\u00f3n de la plataforma giratoria, de modo que la velocidad m\u00e1xima puede alcanzar las 900 rpm y funcionar de forma estable. La eficiencia de desgasificaci\u00f3n tambi\u00e9n se ha mejorado a\u00fan m\u00e1s, pudiendo alcanzar una tasa de desgasificaci\u00f3n de 50%-65% o superior a la convencional.<\/p>\n

\"Unidad<\/p>\n

En la actualidad, la mayor\u00eda de los procesos de fundici\u00f3n de aleaciones de aluminio se han aplicado a Equipos rotativos de desgasificaci\u00f3n<\/a>. La experiencia ha demostrado que las diferentes temperaturas del l\u00edquido en el dispositivo de desgasificaci\u00f3n en l\u00ednea producen distintos efectos de desgasificaci\u00f3n. Por lo tanto, es necesario tener en cuenta los requisitos de temperatura del l\u00edquido para garantizar el efecto de desgasificaci\u00f3n del desgasificador en l\u00ednea.<\/p>\n

Debido a la baja temperatura de fundici\u00f3n, el gas presente en el molde tarda demasiado en salir de la superficie del l\u00edquido, lo que provoca porosidad y, posiblemente, tambi\u00e9n defectos de calidad como escoria y zonas fr\u00edas.<\/p>\n

La temperatura de colada no debe superar la temperatura de fusi\u00f3n. Una temperatura de colada demasiado alta puede provocar fugas de aluminio al inicio de la colada.<\/p>\n

Debido a las diferentes longitudes de las herramientas de transferencia y a las distintas ca\u00eddas de temperatura del l\u00edquido, se producen puntos calientes en las l\u00edneas y la temperatura del l\u00edquido fluct\u00faa considerablemente durante el proceso de transferencia. Por lo tanto, la temperatura de fundici\u00f3n debe referirse a la temperatura del l\u00edquido inyectado en el molde. Normalmente, la temperatura de fundici\u00f3n es entre 50 \u00b0C y 70 \u00b0C superior a la temperatura real de cristalizaci\u00f3n de la aleaci\u00f3n.<\/p>","protected":false},"excerpt":{"rendered":"

Online Degassing Unit generally includes two parts: a degassing device and a heating device. The degassing device uses a graphite rotor to transport N2 to…<\/p>","protected":false},"author":1,"featured_media":12315,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18],"tags":[4492,13170],"class_list":["post-12314","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-degassing-unit","tag-online-degassing-unit","tag-rotary-metal-degassing-system"],"yoast_head":"\nOnline Degassing Unit, Rotary Metal Degassing System<\/title>\n<meta name=\"description\" content=\"Online Degassing Unit generally includes two parts: a degassing device and a heating device. 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