{"id":6026,"date":"2020-10-25T03:47:34","date_gmt":"2020-10-25T03:47:34","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=6026"},"modified":"2020-10-25T03:47:34","modified_gmt":"2020-10-25T03:47:34","slug":"hydrogen-removal-efficiency","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/hydrogen-removal-efficiency\/","title":{"rendered":"Eficiencia en la eliminaci\u00f3n de hidr\u00f3geno"},"content":{"rendered":"<p>El proceso de eliminaci\u00f3n del hidr\u00f3geno del aluminio fundido tiene lugar, en primer lugar, en el interior de la masa fundida. Los \u00e1tomos de hidr\u00f3geno disueltos en el aluminio fundido migran hacia la periferia de las burbujas del agente purificador (Ar o N\u2082, etc.). En la periferia de la burbuja, se adsorben y se agrupan en mol\u00e9culas de hidr\u00f3geno para entrar en la burbuja. Finalmente, la burbuja flota hacia arriba y se separa del flujo cin\u00e9tico del aluminio l\u00edquido. Se trata de un proceso en el que el hidr\u00f3geno se difunde en la fase l\u00edquida y es adsorbido por las burbujas. La ecuaci\u00f3n de la tasa de eliminaci\u00f3n de hidr\u00f3geno del aluminio fundido refleja la eficiencia de eliminaci\u00f3n de hidr\u00f3geno del aluminio fundido desde el punto de vista de la cin\u00e9tica de eliminaci\u00f3n de hidr\u00f3geno.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6027\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/10\/Hydrogen-Removal-Efficiency.jpg\" alt=\"Eficiencia en la eliminaci\u00f3n de hidr\u00f3geno\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/10\/Hydrogen-Removal-Efficiency.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/10\/Hydrogen-Removal-Efficiency-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p>Con el fin de optimizar las condiciones cin\u00e9ticas de eliminaci\u00f3n del hidr\u00f3geno y aumentar la eficiencia interna de eliminaci\u00f3n del hidr\u00f3geno del aluminio fundido, deben cumplirse, en la medida de lo posible y de forma simult\u00e1nea, los cinco requisitos siguientes.<\/p>\n<p>El gran n\u00famero de burbujas implica que debe suministrarse un caudal de gas suficiente. El caudal de gas suele ser el factor principal que influye en la eficacia de la flotaci\u00f3n por burbujas para la eliminaci\u00f3n de hidr\u00f3geno. En las mismas condiciones, cuanto mayor es el caudal de gas, mayor es la superficie espec\u00edfica de contacto entre el gas y el l\u00edquido.<\/p>\n<p>El di\u00e1metro de la burbuja es peque\u00f1o. Con el mismo caudal de aire, si el tama\u00f1o de las burbujas es peque\u00f1o, el n\u00famero de burbujas aumentar\u00e1 naturalmente, lo que incrementar\u00e1 de forma efectiva la superficie espec\u00edfica de contacto entre el gas y el l\u00edquido. Los c\u00e1lculos te\u00f3ricos muestran que el aumento de la superficie total de la burbuja es inversamente proporcional al di\u00e1metro de la misma. Al mismo tiempo, reducir el di\u00e1metro de la burbuja contribuir\u00e1 a aumentar el coeficiente de transferencia de masa.<\/p>\n<p>Las burbujas se distribuyen uniformemente en el ba\u00f1o de aluminio fundido. Esto puede reducir eficazmente la distancia de difusi\u00f3n del hidr\u00f3geno disuelto en el aluminio fundido hasta las burbujas. Este aspecto no debe subestimarse, ya que la difusi\u00f3n del hidr\u00f3geno en la fase l\u00edquida suele ser el eslab\u00f3n limitante en el proceso cin\u00e9tico de eliminaci\u00f3n de hidr\u00f3geno mencionado anteriormente. La distribuci\u00f3n uniforme de las burbujas equivale a reforzar el proceso de difusi\u00f3n o la capacidad de transferencia de masa.<\/p>\n<p>Las burbujas se desplazan a gran velocidad en el aluminio fundido. Esto aumenta la velocidad de agitaci\u00f3n en el interior del aluminio fundido, potencia la renovaci\u00f3n de la interfaz gas-l\u00edquido y mejora la capacidad de transferencia de masa en la fase l\u00edquida.<\/p>\n<p>Las burbujas disponen de un tiempo de permanencia suficiente en el aluminio fundido. De este modo, se puede aprovechar al m\u00e1ximo el potencial de transporte de hidr\u00f3geno de las burbujas, lo que equivale a aumentar el tiempo de deshidrogenaci\u00f3n de las mismas. Al mismo tiempo, cada vez se tiene m\u00e1s conciencia de que, durante el proceso de purificaci\u00f3n del aluminio fundido, puede producirse una absorci\u00f3n de hidr\u00f3geno en la superficie del aluminio fundido al tiempo que se elimina el hidr\u00f3geno del interior del mismo.<\/p>","protected":false},"excerpt":{"rendered":"<p>The process of removing hydrogen from molten aluminum first takes place inside the melt. The hydrogen atoms dissolved in molten aluminum undergo migration to the&hellip;<\/p>","protected":false},"author":1,"featured_media":6027,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-6026","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Hydrogen Removal Efficiency in the molten aluminum<\/title>\n<meta name=\"description\" content=\"Gas flow is the main factor affecting the hydrogen removal efficiency. 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