{"id":2561,"date":"2020-07-02T10:27:20","date_gmt":"2020-07-02T10:27:20","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=2561"},"modified":"2020-09-28T05:42:03","modified_gmt":"2020-09-28T05:42:03","slug":"casting-purification","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/casting-purification\/","title":{"rendered":"Purificaci\u00f3n de la fundici\u00f3n"},"content":{"rendered":"<p>El aluminio l\u00edquido que la barra de aluminio 6061 extrae de la c\u00e9lula electrol\u00edtica contiene diversas impurezas, por lo que debe purificarse antes de la fundici\u00f3n. En la industria se utilizan principalmente m\u00e9todos de purificaci\u00f3n de la fundici\u00f3n como la clarificaci\u00f3n, el fundente y el gas, aunque tambi\u00e9n se recurre a la solidificaci\u00f3n direccional y a m\u00e9todos de filtraci\u00f3n para la purificaci\u00f3n.<\/p>\n<p><strong>Tecnolog\u00eda de purificaci\u00f3n para la fundici\u00f3n de barras de aluminio<\/strong><\/p>\n<p>La purificaci\u00f3n del fundente consiste en utilizar el\u00a0<a href=\"http:\/\/www.alalloycasting.com\/es\/fluxes\/\">flujos<\/a>\u00a0Se a\u00f1ade al aluminio fundido para formar un gran n\u00famero de finas gotas, de modo que los \u00f3xidos presentes en el aluminio fundido sean humedecidos, adsorbidos y disueltos por estas gotas, formando nuevas gotas en la superficie; tras el enfriamiento, se retira la escoria. El fundente utilizado para la purificaci\u00f3n est\u00e1 compuesto por sales con bajos puntos de fusi\u00f3n, baja densidad, baja tensi\u00f3n superficial, alta actividad y una fuerte capacidad de adsorci\u00f3n de la escoria oxidada. Para utilizarlo, primero se introduce un peque\u00f1o trozo de fundente en la jaula de hierro y, a continuaci\u00f3n, se introduce en el fondo del horno de mezcla para agitarlo de un lado a otro. Una vez agotado el fundente, se retira la jaula de hierro y se deja reposar entre 5 y 10 minutos. A continuaci\u00f3n, se retira la espuma superficial para proceder a la colada. El fundente tambi\u00e9n puede retirarse de la superficie seg\u00fan sea necesario para cubrirla.<\/p>\n<p><strong>M\u00e9todo de purificaci\u00f3n para la fundici\u00f3n de barras de aluminio<\/strong><\/p>\n<p>La purificaci\u00f3n con gas es uno de los principales m\u00e9todos de purificaci\u00f3n de las barras de aluminio 6061. El gas utilizado es cloro, nitr\u00f3geno o una mezcla de cloro y nitr\u00f3geno.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-5190\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/07\/Casting-Purification.jpg\" alt=\"Purificaci\u00f3n de la fundici\u00f3n\" width=\"400\" height=\"320\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/07\/Casting-Purification.jpg 400w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/07\/Casting-Purification-300x240.jpg 300w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/p>\n<p>(1) Purificaci\u00f3n del cloro gaseoso. Anteriormente, el cloro gaseoso activo se utilizaba como agente de limpieza (m\u00e9todo de cloraci\u00f3n). En el m\u00e9todo de cloraci\u00f3n, cuando se hace pasar cloro gaseoso a trav\u00e9s del aluminio l\u00edquido, se generan grandes cantidades de AlCl\u2083 de tama\u00f1o anormalmente peque\u00f1o, y las burbujas se mezclan suficientemente con el aluminio l\u00edquido. El hidr\u00f3geno disuelto en el aluminio l\u00edquido y algunas inclusiones mec\u00e1nicas se adsorben en las burbujas de AlCl\u2083 y se eliminan a medida que estas ascienden a la superficie del aluminio l\u00edquido. El cloro gaseoso tambi\u00e9n puede clorar algunos elementos que son m\u00e1s negativos que las barras de aluminio 6061. Por ejemplo, el calcio, el sodio, el magnesio, etc., pueden separarse mediante la formaci\u00f3n de los cloruros correspondientes gracias al cloro gaseoso. Por lo tanto, el m\u00e9todo de cloraci\u00f3n es un m\u00e9todo muy eficaz para la purificaci\u00f3n del aluminio primario. La cantidad de cloro gaseoso es de 500-700 g por tonelada de aluminio. Sin embargo, dado que el ox\u00edgeno es t\u00f3xico y relativamente caro, con el fin de evitar la contaminaci\u00f3n atmosf\u00e9rica y reducir el coste de la producci\u00f3n de lingotes de aluminio, el m\u00e9todo de cloraci\u00f3n se ha ido eliminando gradualmente en la industria moderna del aluminio y se ha sustituido por un m\u00e9todo de purificaci\u00f3n con gas inerte: el nitr\u00f3geno.<\/p>\n<p>(2) M\u00e9todo de purificaci\u00f3n con nitr\u00f3geno. Tambi\u00e9n conocido como m\u00e9todo de purificaci\u00f3n continua sin humos, utiliza bolas de al\u00famina (418 mm) como medio filtrante. El N\u2082 pasa directamente al aluminio fundido. El aluminio l\u00edquido se introduce de forma continua en el horno de purificaci\u00f3n, atraviesa la capa filtrante de bolas de al\u00famina y se barre con nitr\u00f3geno, lo que permite eliminar las inclusiones no met\u00e1licas y el hidr\u00f3geno disuelto en el aluminio l\u00edquido; a continuaci\u00f3n, se descarga de forma continua, de modo que las finas burbujas de nitr\u00f3geno se distribuyen uniformemente y desempe\u00f1an la funci\u00f3n de purificaci\u00f3n en el aluminio l\u00edquido tratado. El nitr\u00f3geno no contamina la atm\u00f3sfera y tiene una gran capacidad de purificaci\u00f3n. Puede procesar entre 200 y 600 kg de aluminio l\u00edquido por minuto. La p\u00e9rdida de aluminio causada por el proceso de purificaci\u00f3n es relativamente reducida, por lo que actualmente se utiliza de forma generalizada. Sin embargo, a diferencia del cloro gaseoso, no puede eliminar el calcio, el sodio y el magnesio del aluminio l\u00edquido.<\/p>\n<p>(3) M\u00e9todo de purificaci\u00f3n con mezcla de gases. Se utiliza una mezcla de cloro y nitr\u00f3geno para purificar el aluminio l\u00edquido. La barra de aluminio 6061 sirve, por un lado, para eliminar el hidr\u00f3geno y los \u00f3xidos y, por otro, para eliminar ciertas impurezas met\u00e1licas (como el magnesio) presentes en el aluminio. La composici\u00f3n habitual es 90% de nitr\u00f3geno + 10 % de cloro. Tambi\u00e9n existe la combinaci\u00f3n de 10% de cloro + 10% de di\u00f3xido de carbono + 80% de nitr\u00f3geno. Este m\u00e9todo ofrece mejores resultados, ya que el di\u00f3xido de carbono favorece la buena difusi\u00f3n del cloro y el nitr\u00f3geno y permite acortar el tiempo de operaci\u00f3n.<\/p>","protected":false},"excerpt":{"rendered":"<p>The aluminum liquid that 6061 aluminum rod sucks out from the electrolytic cell contains various impurities, so it needs to be purified before casting. In&hellip;<\/p>","protected":false},"author":1,"featured_media":5191,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[138],"tags":[741,740,734,724,738,712,720,735,725,737,736,728,727,726,733,739,713,701,704,692,708,707,710,719,711,729,731,693,730,716,714,723,722,721,700,696,702,703,715,695,694,697,698,706,699,732,705,717,718,709],"class_list":["post-2561","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-seo","tag-aluminium-casting-company-flux-purification","tag-aluminium-die-casting-companies-flux-purification","tag-aluminium-gravity-die-casting-flux-purification","tag-aluminium-hot-top-flux-purification","tag-aluminium-investment-casting-flux-purification","tag-aluminium-strip-flux-purification","tag-aluminum-billet-casting-flux-purification","tag-aluminum-can-foundry-flux-purification","tag-aluminum-casting-companies-flux-purification","tag-aluminum-casting-equipment-flux-purification","tag-aluminum-casting-grain-flux-purification","tag-aluminum-casting-near-me-flux-purification","tag-aluminum-die-casting-companies-flux-purification","tag-aluminum-foundry-near-me-flux-purification","tag-aluminum-gravity-casting-flux-purification","tag-aluminum-gravity-die-casting-flux-purification","tag-aluminum-ingot-flux-purification","tag-aluminum-metallurgy-flux-purification","tag-aluminum-or-aluminium-flux-purification","tag-aluminum-rod-casting-purification-technology","tag-cast-aluminum-flux-purification","tag-castable-refractory-flux-purification","tag-ceramic-insulation-flux-purification","tag-ceramic-shell-casting-flux-purification","tag-continuous-casting-flux-purification","tag-die-casting-companies-near-me-flux-purification","tag-electric-aluminum-foundry-flux-purification","tag-flux-purification","tag-foundry-aluminum-casting-flux-purification","tag-foundry-factory-flux-purification","tag-foundry-flux-purification","tag-hot-top-aluminium-flux-purification","tag-hot-top-cast-flux-purification","tag-hot-top-casting-flux-purification","tag-liquid-aluminum-flux-purification","tag-materials-and-metallurgy-flux-purification","tag-melting-aluminum-flux-purification","tag-melting-point-of-aluminum-flux-purification","tag-metal-foundry-flux-purification","tag-metal-metallurgy-flux-purification","tag-metallurgical-engineering-flux-purification","tag-metallurgical-industry-flux-purification","tag-metallurgical-products-flux-purification","tag-metallurgy-company-flux-purification","tag-metallurgy-of-aluminium-flux-purification","tag-molten-aluminum-casting-flux-purification","tag-molten-aluminum-flux-purification","tag-shell-casting-flux-purification","tag-shell-mould-casting-flux-purification","tag-what-is-flux-purification"],"yoast_head":"<!-- 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