{"id":10027,"date":"2021-08-23T09:51:41","date_gmt":"2021-08-23T09:51:41","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=10027"},"modified":"2021-08-23T09:51:41","modified_gmt":"2021-08-23T09:51:41","slug":"degassing-purification","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/degassing-purification\/","title":{"rendered":"Purificaci\u00f3n por desgasificaci\u00f3n"},"content":{"rendered":"<p>El proceso de purificaci\u00f3n mediante desgasificaci\u00f3n para la eliminaci\u00f3n de hidr\u00f3geno consiste principalmente en purgar el aluminio fundido con un gas inerte (N\u2082, Ar), lo que permite eliminar eficazmente el hidr\u00f3geno y las inclusiones de \u00f3xido presentes en el fundido.<\/p>\n<p>El principio de la purificaci\u00f3n mediante desgasificaci\u00f3n por eliminaci\u00f3n de hidr\u00f3geno: dado que la presi\u00f3n parcial inicial de hidr\u00f3geno en la burbuja de N\u2082 es cero, existe una diferencia de presi\u00f3n en la interfaz entre la burbuja y el aluminio fundido, de modo que el hidr\u00f3geno disuelto en el metal fundido es aspirado continuamente hacia el interior de la burbuja. Este proceso de succi\u00f3n no se detendr\u00e1 hasta que la presi\u00f3n parcial de hidr\u00f3geno en la burbuja sea igual a la presi\u00f3n parcial de hidr\u00f3geno en el aluminio fundido. Una vez que la burbuja asciende a la superficie, el H contenido en ella se escapa y se libera a la atm\u00f3sfera. Por lo tanto, durante el proceso de ascenso de la burbuja, se eliminan tanto las inclusiones oxidadas como el hidr\u00f3geno, lo que permite purificar el aluminio l\u00edquido.<\/p>\n<p>Seg\u00fan el principio de la purificaci\u00f3n mediante eliminaci\u00f3n de hidr\u00f3geno, sabemos que existen tres formas principales de mejorar la velocidad y la eficiencia de la eliminaci\u00f3n de hidr\u00f3geno:<\/p>\n<p>1. Aumentar al m\u00e1ximo el n\u00famero de burbujas de purificaci\u00f3n para incrementar la superficie de contacto efectiva entre el aluminio l\u00edquido y las burbujas.<br \/>\n2. Reducir al m\u00e1ximo el di\u00e1metro de las burbujas de purificaci\u00f3n e intentar aumentar la velocidad de desplazamiento de estas burbujas en el aluminio fundido sin provocar salpicaduras en la superficie del l\u00edquido; es decir, aumentar la intensidad de la agitaci\u00f3n, potenciar la renovaci\u00f3n de la interfaz gas-l\u00edquido y mejorar su capacidad de transferencia de masa.<br \/>\n3. Prolongar al m\u00e1ximo la distancia de flotaci\u00f3n de las burbujas de purificaci\u00f3n en el aluminio fundido, es decir, aumentar el tiempo durante el cual las burbujas act\u00faan sobre el aluminio fundido, mejorando as\u00ed la eficiencia de la eliminaci\u00f3n de hidr\u00f3geno.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-9805\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2021\/08\/Rotating-Rotor-Degassing-Method.jpg\" alt=\"M\u00e9todo de desgasificaci\u00f3n con rotor giratorio\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2021\/08\/Rotating-Rotor-Degassing-Method.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2021\/08\/Rotating-Rotor-Degassing-Method-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p>A medida que se han ido exigiendo mayores requisitos de pureza del metal fundido, la tecnolog\u00eda de eliminaci\u00f3n de hidr\u00f3geno tambi\u00e9n se ha ido perfeccionando y desarrollando continuamente. Ha evolucionado desde la inyecci\u00f3n original mediante un solo tubo, pasando por el cabezal de soplado poroso, hasta la actual boquilla giratoria. Desde la d\u00e9cada de 1980, el uso de m\u00e9todos de tratamiento mediante soplado de aire con boquilla giratoria se ha convertido en la principal tendencia de desarrollo de la tecnolog\u00eda avanzada extranjera de purificaci\u00f3n del aluminio fundido.<\/p>\n<p>El <a href=\"http:\/\/www.alalloycasting.com\/es\/rotary-degassing-equipment\/\">equipo de desgasificaci\u00f3n rotativo<\/a> Est\u00e1 equipado con una boquilla giratoria de gas fabricada en grafito, y el gas pasa a trav\u00e9s del rotor de la boquilla para formar peque\u00f1as burbujas finas y dispersas. El rotor agita la masa fundida. Las burbujas se dispersan uniformemente por toda la masa fundida, lo que aumenta la superficie de contacto entre el gas y el l\u00edquido, prolonga la distancia de desplazamiento y el tiempo de permanencia de las burbujas en el aluminio fundido, incrementa el volumen de gas y permite que las burbujas adsorban el gas y las inclusiones oxidadas presentes en la masa fundida. Las burbujas flotan hasta la superficie del metal fundido, produciendo as\u00ed el efecto purificador de desgasificaci\u00f3n y eliminaci\u00f3n de impurezas.<\/p>","protected":false},"excerpt":{"rendered":"<p>The hydrogen removal degassing purification is mainly using an inert gas (N2, Ar) to purge the aluminum melt, which can effectively remove the hydrogen and&hellip;<\/p>","protected":false},"author":1,"featured_media":10028,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[12491,1769],"class_list":["post-10027","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-degassing-purification-with-nitrogen","tag-rotary-degassing-equipment"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Degassing Purification with Nitrogen, Rotary Degassing 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