{"id":7591,"date":"2021-01-19T06:18:13","date_gmt":"2021-01-19T06:18:13","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=7591"},"modified":"2021-01-19T06:18:13","modified_gmt":"2021-01-19T06:18:13","slug":"degassing-aluminium","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/degassing-aluminium\/","title":{"rendered":"Desgasificaci\u00f3n del aluminio"},"content":{"rendered":"

La desgasificaci\u00f3n es una etapa tecnol\u00f3gica intermedia en la producci\u00f3n de aluminio, situada entre la fusi\u00f3n y la colada del metal. En el aluminio l\u00edquido se ha disuelto principalmente hidr\u00f3geno debido a la reacci\u00f3n con el vapor de agua. Para evitar la formaci\u00f3n de poros durante la colada, se elimina el hidr\u00f3geno; es decir, se desgasifica el metal l\u00edquido. Normalmente, la desgasificaci\u00f3n se consigue inyectando un gas inerte en el metal, normalmente arg\u00f3n, que se une a las burbujas de hidr\u00f3geno. Para que el proceso industrial sea m\u00e1s eficiente, el tama\u00f1o de las burbujas de arg\u00f3n debe ser lo m\u00e1s peque\u00f1o posible. En la actualidad, el m\u00e9todo m\u00e1s utilizado es el sistema de desgasificaci\u00f3n en l\u00ednea.<\/p>\n

Al fundir chatarra de aluminio, el proceso de eliminaci\u00f3n del exceso de hidr\u00f3geno es esencial para producir piezas de fundici\u00f3n de aluminio de calidad.<\/p>\n

El hidr\u00f3geno se introduce a trav\u00e9s de la humedad. El exceso de hidr\u00f3geno tiene un efecto negativo en las propiedades mec\u00e1nicas del aluminio acabado, ya que provoca porosidad y contracci\u00f3n general. Es importante eliminar el exceso de hidr\u00f3geno durante el proceso de fundici\u00f3n y colada.<\/p>\n

La introducci\u00f3n de gases inertes, como el arg\u00f3n o el nitr\u00f3geno, en el metal fundido puede servir para eliminar el hidr\u00f3geno. A medida que las burbujas de gas inerte ascienden a trav\u00e9s del aluminio fundido, el hidr\u00f3geno se difunde en ellas y, en esencia, desaparece. Los sistemas de desgasificaci\u00f3n tradicionales limitan la mezcla, especialmente en la parte inferior, donde se requieren velocidades m\u00e1s altas, lo que provoca una mayor turbulencia en la superficie. Las burbujas son m\u00e1s grandes y la desgasificaci\u00f3n tarda m\u00e1s en alcanzar los resultados deseados. Los fundidores buscan un mayor cizallamiento y dispersi\u00f3n de las burbujas, un mayor tiempo de retenci\u00f3n de las burbujas en el metal, una circulaci\u00f3n completa del metal fundido, un rotor que no se obstruya y una mayor resistencia al choque t\u00e9rmico. Adem\u00e1s, preferir\u00edan utilizar menos gas inerte en el proceso.<\/p>\n

\"Sistema<\/p>\n

AdTech sistemas de desgasificaci\u00f3n en l\u00ednea<\/a> conseguir mejores resultados en la desgasificaci\u00f3n del aluminio en menos tiempo y con un menor coste total.<\/p>\n

El cabezal del rotor favorece un mayor movimiento del metal, expuls\u00e1ndolo hacia fuera y extray\u00e9ndolo desde el fondo para mejorar la circulaci\u00f3n. El movimiento rotatorio \u00fanico del cabezal del rotor rompe las burbujas para evitar que el gas suba. El rotor, de ingenioso dise\u00f1o, empuja el metal hacia fuera y lo extrae del fondo para mejorar el flujo, aumentando as\u00ed la superficie de reacci\u00f3n. Funciona a un n\u00famero de revoluciones por minuto (rpm) m\u00e1s bajo y elimina las \u201czonas muertas\u201d en la masa fundida.<\/p>","protected":false},"excerpt":{"rendered":"

Degassing is a technological intermediate step in the production of aluminium between the melting and casting of the metal. Mainly hydrogen has been dissolved in…<\/p>","protected":false},"author":1,"featured_media":7595,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-7591","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nDegassing Aluminium with Online Degassing Systems<\/title>\n<meta name=\"description\" content=\"AdTech online degassing systems achieve better degassing aluminium results in less time and with less overall cost. 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