{"id":10604,"date":"2021-10-14T07:44:46","date_gmt":"2021-10-14T07:44:46","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=10604"},"modified":"2021-10-14T07:44:46","modified_gmt":"2021-10-14T07:44:46","slug":"degassing-with-flux","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/degassing-with-flux\/","title":{"rendered":"Desgasificaci\u00f3n con fundente"},"content":{"rendered":"

En el caso del aluminio y las aleaciones de aluminio, la desgasificaci\u00f3n y la formaci\u00f3n de escoria con fundente constituyen un m\u00e9todo importante. Cuando se utiliza el refinado con fundente, se forma en la masa fundida un gran n\u00famero de gotitas de fundente finas y dispersas. Seg\u00fan la ley del equilibrio de disoluci\u00f3n, el hidr\u00f3geno at\u00f3mico presente en el ba\u00f1o fundido es transportado hacia la superficie del l\u00edquido debido a la difusi\u00f3n de las gotitas de fundente, lo que reduce as\u00ed el contenido de hidr\u00f3geno en el ba\u00f1o fundido.<\/p>\n

Durante la fundici\u00f3n, el metal fundido contiene una gran cantidad de gas y se solidifica, formando un orificio redondo con una superficie interior lisa en el lingote. Las principales causas de la formaci\u00f3n de poros son: que las materias primas utilizadas est\u00e9n h\u00famedas y que el horno y las herramientas no est\u00e9n completamente secos. La temperatura de fusi\u00f3n es elevada, la cobertura es deficiente, el tiempo de permanencia a alta temperatura es prolongado y la masa fundida absorbe una gran cantidad de gas. Si el proceso de desgasificaci\u00f3n y refinado no es completo, durante el proceso de cristalizaci\u00f3n el gas no logra escapar de la masa fundida y forma poros. Tras el procesamiento a presi\u00f3n, los poros pueden comprimirse, pero no es f\u00e1cil de prensar, y es f\u00e1cil que se produzcan defectos como la formaci\u00f3n de una capa superficial y burbujas en los productos procesados y tratados t\u00e9rmicamente, adem\u00e1s de que las diversas propiedades del metal se ven dr\u00e1sticamente reducidas.<\/p>\n

El fundente utilizado para la purificaci\u00f3n es una sal con bajo punto de fusi\u00f3n, baja densidad, baja tensi\u00f3n superficial, alta actividad y gran capacidad de adsorci\u00f3n de \u00f3xidos. Para utilizarlo, introduce un peque\u00f1o trozo de fundente en la jaula de hierro, ins\u00e9rtala en el fondo del horno de mezcla y remueve de un lado a otro. Una vez que el fundente se haya consumido, saca la jaula de hierro y d\u00e9jala reposar entre 5 y 10 minutos. Retira la espuma superficial y, a continuaci\u00f3n, procede a la fundici\u00f3n.<\/p>\n

\"Aluminio<\/p>\n

Si fuera necesario, el flujo de cobertura<\/a> Tambi\u00e9n se puede espolvorear sobre la superficie para cubrirla. Aunque el fundente puede disolver hidr\u00f3geno y generar gas vol\u00e1til al reaccionar con el aluminio, tiene un efecto desgasificador. Sin embargo, la pr\u00e1ctica ha demostrado que el efecto desgasificador es inferior al del refinado y desgasificado con gas, y que el efecto de eliminaci\u00f3n de escoria en la masa fundida es mucho mejor que el del refinado con gas. El efecto de eliminaci\u00f3n de escoria del fundente se consigue principalmente mediante la adsorci\u00f3n, la disoluci\u00f3n y la reacci\u00f3n qu\u00edmica del fundente con la escoria de al\u00famina presente en la masa fundida.<\/p>","protected":false},"excerpt":{"rendered":"

For aluminum and aluminum alloys, degassing and slagging with flux is an important method. When using flux refining, a large number of dispersed and fine…<\/p>","protected":false},"author":1,"featured_media":10605,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-10604","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nDegassing with Flux, Aluminum Dgeassing Refining<\/title>\n<meta name=\"description\" content=\"For aluminum and aluminum alloys, degassing and slagging with flux is an important method. 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