{"id":10551,"date":"2021-10-12T09:19:20","date_gmt":"2021-10-12T09:19:20","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=10551"},"modified":"2021-10-12T09:19:20","modified_gmt":"2021-10-12T09:19:20","slug":"foundries-refining-flux","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/foundries-refining-flux\/","title":{"rendered":"Fundiciones: fundente de refinado"},"content":{"rendered":"

El fundente de refiner\u00eda se basa en una mezcla de sales fundidas y se utiliza habitualmente para el procesamiento del aluminio fundido. Se emplea para proteger de forma pasiva a los metales contra la oxidaci\u00f3n y, en ocasiones, para eliminar elementos aditivos presentes como impurezas en el aluminio fundido. El fundente es principalmente una mezcla de sales de cloruro y fluoruro, adem\u00e1s de aditivos. La mayor\u00eda de los fundentes se basan en una mezcla de NaCl y KCl.<\/p>\n

El fundente de refinado de las fundiciones se utiliza principalmente para reducir el contenido de hidr\u00f3geno y las inclusiones. El hidr\u00f3geno disuelto es una de las impurezas m\u00e1s comunes en el aluminio fundido y resulta muy indeseable. El hidr\u00f3geno se convierte en un problema porque es insoluble en el aluminio s\u00f3lido. El hidr\u00f3geno disuelto en el aluminio fundido se disolver\u00e1 durante la solidificaci\u00f3n y provocar\u00e1 la formaci\u00f3n de poros en el material. Las inclusiones pueden describirse como part\u00edculas s\u00f3lidas no met\u00e1licas suspendidas en la masa fundida. La cantidad de estas part\u00edculas depende en gran medida de la calidad y la limpieza de los residuos. Otras fuentes de inclusiones pueden ser los materiales refractarios del horno.<\/p>\n

Entre las principales funciones del agente refinador tambi\u00e9n se incluyen: proteger la masa fundida de una mayor oxidaci\u00f3n mediante el recubrimiento, la disoluci\u00f3n o la suspensi\u00f3n de impurezas, \u00f3xidos y otras part\u00edculas no met\u00e1licas. Las gotitas de compuestos salinos act\u00faan como burbujas y suspenden las inclusiones en la superficie mediante flotaci\u00f3n. Dado que la velocidad a la que las gotitas de fundente ascienden a la superficie es mucho menor que la de las burbujas, se requiere un cierto tiempo de estabilizaci\u00f3n.<\/p>\n

\"Fundentes<\/p>\n

Existen muchos tipos de fundiciones que refinan los fundentes utilizados para la fundici\u00f3n de aleaciones de aluminio, que pueden dividirse en dos categor\u00edas: agente de recubrimiento<\/a> y agente refinador<\/a>.<\/p>\n

El fundente de refinado utilizado en el proceso de fundici\u00f3n de aleaciones de aluminio debe cumplir las siguientes condiciones:<\/strong><\/p>\n

1. El punto de fusi\u00f3n debe ser inferior a la temperatura de fusi\u00f3n de la aleaci\u00f3n de aluminio.
\n2. La densidad debe ser inferior a la de la aleaci\u00f3n de aluminio.
\n3. Es capaz de absorber y disolver las inclusiones presentes en la masa fundida, as\u00ed como de eliminar el gas de la misma.
\n4. No debe presentar actividad qu\u00edmica con el metal ni con el revestimiento del horno. Si interact\u00faa con el metal, solo debe generar un gas inerte que sea insoluble en el metal, y el fundente debe ser insoluble en el metal fundido.
\n5. Baja absorci\u00f3n de humedad y baja presi\u00f3n de evaporaci\u00f3n.
\n6. No debe contener ni generar impurezas ni gases nocivos.
\n7. Debe tener la viscosidad y la fluidez adecuadas.
\n8. F\u00e1cil de fabricar: precio econ\u00f3mico.<\/p>","protected":false},"excerpt":{"rendered":"

Foundries refining flux is based on the molten salt mixture, usually used for the processing of molten aluminum. It is used to passively protect metals…<\/p>","protected":false},"author":1,"featured_media":10553,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[120],"tags":[],"class_list":["post-10551","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fluxes"],"yoast_head":"\nFoundries Refining Flux -sales@alalloycasting.com<\/title>\n<meta name=\"description\" content=\"Foundries refining flux is based on the molten salt mixture, used for reducing the content of hydrogen and inclusions in molten aluminum.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.alalloycasting.com\/es\/foundries-refining-flux\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" 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