fundente de refinado<\/a>\u00a0Al absorber las inclusiones oxidadas presentes en la masa fundida, puede reducir la energ\u00eda libre superficial del sistema. Por lo tanto, el fundente tiene la capacidad de adsorber autom\u00e1ticamente las inclusiones de oxidaci\u00f3n, es decir, posee propiedades refinadoras. Esta adsorci\u00f3n es la raz\u00f3n principal por la que el fundente elimina las escorias.<\/p>\nObviamente, cuanto menor sea la tensi\u00f3n interfacial entre el fundente y las inclusiones no met\u00e1licas, y cuanto mayor sea la tensi\u00f3n interfacial entre el fundente y el aluminio fundido, as\u00ed como la tensi\u00f3n interfacial entre el aluminio fundido y las inclusiones no met\u00e1licas, mejor ser\u00e1 la adsorci\u00f3n del fundente. Cuanto m\u00e1s intenso es el efecto de eliminaci\u00f3n de escoria, el efecto de disoluci\u00f3n del fundente sobre los \u00f3xidos viene determinado por la naturaleza del propio fundente.<\/p>\n
Por lo general, cuando la estructura molecular de los fundentes es similar a la estructura molecular o a las propiedades qu\u00edmicas de algunos \u00f3xidos, puede producirse una disoluci\u00f3n mutua a una temperatura determinada. Por ejemplo, el Al\u2082O\u2083 y el Na\u2083AlF\u2086, as\u00ed como el MgO y el MgCl\u2082, que comparten el mismo cati\u00f3n, presentan una cierta solubilidad mutua. Sin embargo, en el rango normal de temperaturas de refinado del aluminio fundido, la cantidad de \u00f3xidos disueltos en el fundente es muy peque\u00f1a.<\/p>\n
El efecto desgasificador del fundente de la fundici\u00f3n de aluminio se manifiesta principalmente en tres aspectos:<\/p>\n
En primer lugar, al eliminar el complejo, se elimina parte del hidr\u00f3geno complejo absorbido por las impurezas oxidadas. En segundo lugar, cuando el fundente se descompone o interact\u00faa con el metal fundido, forma un producto gaseoso que permite la difusi\u00f3n y la eliminaci\u00f3n del hidr\u00f3geno. Adem\u00e1s, dado que la pel\u00edcula de \u00f3xido de la superficie del metal fundido se disuelve, el hidr\u00f3geno at\u00f3mico disuelto puede difundirse f\u00e1cilmente a la atm\u00f3sfera. Sin embargo, el efecto de desgasificaci\u00f3n del fundente es limitado. En condiciones de producci\u00f3n, su contenido de hidr\u00f3geno solo puede reducirse hasta un nivel de 0,2-0,25 ml\/100 g de Al. El uso de AdTech en l\u00ednea equipos de purificaci\u00f3n por desgasificaci\u00f3n<\/a> puede reducir a\u00fan m\u00e1s el contenido de hidr\u00f3geno en el aluminio fundido.<\/p>","protected":false},"excerpt":{"rendered":"The main function of aluminum smelter flux is to remove slag and gas, and is widely used in aluminum furnaces and foundries. The slag removal…<\/p>","protected":false},"author":1,"featured_media":10340,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[120],"tags":[],"class_list":["post-10339","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fluxes"],"yoast_head":"\n
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