{"id":3051,"date":"2018-01-23T09:12:45","date_gmt":"2018-01-23T09:12:45","guid":{"rendered":"http:\/\/www.adtechamm.com\/?p=3051"},"modified":"2018-01-23T09:13:04","modified_gmt":"2018-01-23T09:13:04","slug":"flux-for-aluminum-melting","status":"publish","type":"post","link":"https:\/\/www.adtechamm.com\/es\/flux-for-aluminum-melting\/","title":{"rendered":"Fundente para la fundici\u00f3n de aluminio"},"content":{"rendered":"<p><strong>Fundente para la fundici\u00f3n de aluminio<\/strong> Son sustancias s\u00f3lidas (normalmente mezclas de sales de cloruro y fluoruro) que se utilizan en las fundiciones de aluminio con el fin de reducir la oxidaci\u00f3n del metal fundido, minimizar la penetraci\u00f3n del hidr\u00f3geno atmosf\u00e9rico, absorber las inclusiones no met\u00e1licas suspendidas en el metal fundido, mantener limpias las paredes del horno y la cuchara de los \u00f3xidos acumulados, disminuir el contenido de aluminio retenido en la escoria, eliminar el hidr\u00f3geno disuelto en el metal fundido, refinar el grano del aluminio durante la solidificaci\u00f3n, modificar las inclusiones de silicio en las aleaciones que contienen silicio y oxidar el exceso de magnesio.<\/p>\n<p>La forma habitual de aplicar el fundente es hacerlo manualmente.<br \/>\nLa mayor\u00eda de los fundentes se aplican sobre la superficie del ba\u00f1o de fusi\u00f3n y se mezclan con \u00e9l. Algunos de los fundentes (para desgasificaci\u00f3n y refinado de grano) se introducen hasta el fondo mediante una campana perforada, limpia y precalentada.<\/p>\n<p>Los fundentes tambi\u00e9n pueden introducirse en la masa fundida mediante inyecci\u00f3n, en forma de polvo transportado por una corriente de gas inerte (arg\u00f3n o nitr\u00f3geno).<br \/>\nLa t\u00e9cnica m\u00e1s sencilla de inyecci\u00f3n de fundente consiste en sumergir una lanza en la masa fundida.<br \/>\nEl m\u00e9todo m\u00e1s eficaz para introducir el fundente es la inyecci\u00f3n mediante un desgasificador rotativo.<\/p>\n<p><img class=\"alignnone wp-image-3034 size-full\" title=\"Fundente para la fundici\u00f3n de aluminio\" src=\"http:\/\/www.adtechamm.com\/wp-content\/uploads\/2018\/01\/20180117Aluminum-Casting-Foundry-Flux.jpg\" alt=\"Fundente para la fundici\u00f3n de aluminio\" width=\"800\" height=\"600\" srcset=\"https:\/\/www.adtechamm.com\/wp-content\/uploads\/2018\/01\/20180117Aluminum-Casting-Foundry-Flux.jpg 800w, https:\/\/www.adtechamm.com\/wp-content\/uploads\/2018\/01\/20180117Aluminum-Casting-Foundry-Flux-300x225.jpg 300w, https:\/\/www.adtechamm.com\/wp-content\/uploads\/2018\/01\/20180117Aluminum-Casting-Foundry-Flux-768x576.jpg 768w, https:\/\/www.adtechamm.com\/wp-content\/uploads\/2018\/01\/20180117Aluminum-Casting-Foundry-Flux-700x525.jpg 700w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p><strong>Flujos de desgasificaci\u00f3n<\/strong><br \/>\nPara la desgasificaci\u00f3n de aleaciones de aluminio fundidas se utilizan fundentes compuestos por sales que contienen cloro y fl\u00faor. Los fundentes de desgasificaci\u00f3n suelen presentarse en forma de pastillas. La operaci\u00f3n de desgasificaci\u00f3n comienza cuando una campana perforada, limpia y precalentada, sumerge una pastilla de fundente en el fondo del horno. Los componentes del fundente reaccionan con el aluminio formando compuestos gaseosos (cloruro de aluminio, fluoruro de aluminio). El gas burbujea y asciende a trav\u00e9s del ba\u00f1o de fusi\u00f3n. La presi\u00f3n parcial del hidr\u00f3geno en las burbujas formadas es muy baja, por lo que este se difunde desde el aluminio fundido hacia las burbujas. Las burbujas se escapan del ba\u00f1o de fusi\u00f3n y el gas se elimina a continuaci\u00f3n mediante el sistema de extracci\u00f3n. El proceso contin\u00faa hasta que cesa el burbujeo. El fundente de desgasificaci\u00f3n tambi\u00e9n puede introducirse mediante un m\u00e9todo de inyecci\u00f3n. En este caso, el gas inerte act\u00faa como portador del fundente granulado. Adem\u00e1s del efecto de desgasificaci\u00f3n, el tratamiento de desgasificaci\u00f3n permite eliminar las inclusiones no met\u00e1licas suspendidas en el ba\u00f1o fundido (efecto de limpieza).<\/p>\n<p><a href=\"http:\/\/www.adtechamm.com\/es\/portfolio_page\/refining-flux\/\"><strong>Refinadores de cereales<\/strong><\/a><br \/>\nFundentes de refinado de grano compuestos por sales que contienen titanio y boro (K\u2082TiF\u2086 y KBF\u2084). Estos fundentes provocan la formaci\u00f3n de numerosos n\u00facleos de TiAl\u2083 y TiB\u2082 cuando se enfr\u00eda el aluminio fundido. Los granos de aluminio comienzan a solidificarse en la superficie de los n\u00facleos. El tama\u00f1o medio de los granos s\u00f3lidos viene determinado por la concentraci\u00f3n de los n\u00facleos en la masa fundida antes de la solidificaci\u00f3n. La estructura de grano fino se caracteriza por una mejor fluidez durante la solidificaci\u00f3n, una baja microsegregaci\u00f3n de impurezas y una baja porosidad por contracci\u00f3n. Un m\u00e9todo alternativo para el refinado de grano del aluminio es la introducci\u00f3n de aleaciones maestras que contengan titanio y boro (p. ej., Al-5%Ti-1%B).<\/p>","protected":false},"excerpt":{"rendered":"<p>Flux For Aluminum Melting is solid substances (commonly mixtures of chloride and fluoride salts) used in aluminum foundries in order to reduce the melt oxidation, minimize penetration of the atmospheric Hydrogen, absorb non-metallic inclusions suspended in the melt, keep the furnace\/ladle wall clean from the&#8230;<\/p>","protected":false},"author":1,"featured_media":3034,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[52],"tags":[763,757,758,759],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Flux For Aluminum Melting-AdTech Metallurgical Materials Co.,Ltd.<\/title>\n<meta name=\"description\" content=\"Flux For 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