{"id":6408,"date":"2020-11-13T06:27:46","date_gmt":"2020-11-13T06:27:46","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=6408"},"modified":"2020-11-13T06:27:46","modified_gmt":"2020-11-13T06:27:46","slug":"flux-refining-methods","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/flux-refining-methods\/","title":{"rendered":"M\u00e9todos de refinado con fundente"},"content":{"rendered":"<p>En t\u00e9rminos generales, la purificaci\u00f3n en horno incluye el m\u00e9todo del fundente, el m\u00e9todo de refinado con gas (gas activo y degradable), la purificaci\u00f3n al vac\u00edo y la purificaci\u00f3n en campo. De entre ellos, la purificaci\u00f3n con fundente y la purificaci\u00f3n con gas son los m\u00e9todos de refinado en horno m\u00e1s utilizados en la industria. La purificaci\u00f3n con fundente se lleva a cabo durante el proceso de fundici\u00f3n de aleaciones de aluminio: se a\u00f1ade el fundente al ba\u00f1o de fusi\u00f3n y, mediante una serie de efectos f\u00edsicos y qu\u00edmicos, se consigue el objetivo de desgasificaci\u00f3n y eliminaci\u00f3n de impurezas. La capacidad de eliminaci\u00f3n de impurezas del fundente viene determinada por la adsorci\u00f3n y disoluci\u00f3n de las inclusiones oxidadas en el ba\u00f1o de fusi\u00f3n por parte del fundente, as\u00ed como por la interacci\u00f3n qu\u00edmica entre este y el ba\u00f1o de fusi\u00f3n. Cuanto menor sea la tensi\u00f3n interfacial entre el fundente y las inclusiones, mejor ser\u00e1 la adsorci\u00f3n del fundente y m\u00e1s eficaz ser\u00e1 la eliminaci\u00f3n de impurezas. Adem\u00e1s de los m\u00e9todos de refinado con fundente para la desgasificaci\u00f3n y la eliminaci\u00f3n de impurezas, existen otros fundentes, como los agentes de recubrimiento, <a href=\"http:\/\/www.alalloycasting.com\/es\/deslagging-flux\/\">producto de limpieza de escoria<\/a>, etc. Este art\u00edculo trata principalmente sobre el fundente para la desgasificaci\u00f3n y la formaci\u00f3n de escoria.<\/p>\n<p>En comparaci\u00f3n con la purificaci\u00f3n por fundente, la purificaci\u00f3n por gas se basa principalmente en la inyecci\u00f3n de gas activo o inerte en la masa fundida. Adem\u00e1s de aprovechar la ley de la presi\u00f3n parcial de los gases para lograr la desgasificaci\u00f3n y la adsorci\u00f3n e inclusi\u00f3n de burbujas, el gas activo tambi\u00e9n puede combinarse con el hidr\u00f3geno presente en la masa fundida, con el que reacciona directamente para generar productos gaseosos que permiten la difusi\u00f3n y la desgasificaci\u00f3n, as\u00ed como la flotaci\u00f3n y la eliminaci\u00f3n de escorias. Adem\u00e1s, el gas activo tambi\u00e9n puede reaccionar con los metales alcalinos o alcalinot\u00e9rreos presentes en la masa fundida para generar sales de baja densidad, que flotan hasta la superficie del aluminio fundido para eliminar dichos metales. Tomando como ejemplo el cloro, un gas reactivo t\u00edpico, la reacci\u00f3n b\u00e1sica del cloro al entrar en la masa fundida es la siguiente:<\/p>\n<p>3Cl\u2082 + 2Al = 2AlCl\u2083\u2191<br \/>\nCl\u2082 + H\u2082 = 2HCl\u2191<br \/>\nCl\u2082 + 2Na = 2NaCl<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6410\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/11\/Flux-Refining-Methods.jpg\" alt=\"M\u00e9todos de refinado con fundente\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/11\/Flux-Refining-Methods.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/11\/Flux-Refining-Methods-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p>Se observa que tanto el cloro como los productos de la reacci\u00f3n de cloraci\u00f3n, el AlCl\u2083 y el HCl, son gases que se elevan espont\u00e1neamente en la masa fundida. De este modo se consigue la purificaci\u00f3n. Adem\u00e1s, puede reaccionar directamente con el hidr\u00f3geno presente en la masa fundida para lograr la eliminaci\u00f3n de este. Se trata de un medio eficaz para el refinado de la masa fundida.<\/p>","protected":false},"excerpt":{"rendered":"<p>Generally speaking, furnace purification includes flux method, gas refining method (active and degradable gas), vacuum purification, and field purification. Among them, flux purification and gas&hellip;<\/p>","protected":false},"author":1,"featured_media":6409,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-6408","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>Flux Refining Methods for Aluminum Degassing and Impurity Removal<\/title>\n<meta name=\"description\" content=\"Flux and gas purification are the most widely used furnace refining methods in the industry. 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