purificaci\u00f3n del aluminio<\/a> El funcionamiento de un purificador de gases se basa en la teor\u00eda de la flotaci\u00f3n por burbujas. Seg\u00fan la clasificaci\u00f3n por actividad de los purificadores de gases, estos se pueden dividir en tres categor\u00edas: gases inertes, gases activos y gases oxidantes.<\/p>\nPor \u00abgas inerte\u00bb se entiende aquel gas que no reacciona qu\u00edmicamente con el aluminio fundido ni con el hidr\u00f3geno disuelto, y que es insoluble en el aluminio; se trata principalmente de Ar, N\u2082, He, etc. Estos gases son no t\u00f3xicos, ins\u00edpidos y no contaminantes, no requieren instalaciones de tratamiento de gases residuales y pueden adsorber f\u00edsicamente y eliminar el hidr\u00f3geno del aluminio fundido.<\/p>\n
Por \u00abgas activo\u00bb se entiende principalmente el Cl\u2082, adem\u00e1s del ZnCl, el MnCl, el C\u2082Cl\u2086, el CCl\u2084 y otras sales de cloro o cloruros producidos en el proceso de purificaci\u00f3n. El Cl\u2082 en s\u00ed mismo es insoluble en el aluminio, pero el cloro gaseoso reacciona con el aluminio y con el hidr\u00f3geno disuelto en \u00e9l. Los productos de la reacci\u00f3n, el HCl y el AlCl\u2083, son gaseosos e insolubles en el aluminio fundido. Inicialmente, la presi\u00f3n parcial de hidr\u00f3geno en la burbuja de AlCl\u2083 es nula, lo que permite eliminar el hidr\u00f3geno del fundido. El gas activo tiene efectos tanto f\u00edsicos como qu\u00edmicos en la eliminaci\u00f3n del hidr\u00f3geno del aluminio fundido. Sin embargo, dado que es nocivo para el cuerpo humano, contamina el medio ambiente, corroe f\u00e1cilmente los equipos y los elementos calefactores, y tiende a hacer que la estructura cristalina del lingote de aleaci\u00f3n resulte gruesa, se suele utilizar gas inerte para evitar riesgos para la poblaci\u00f3n.<\/p>\n
Por \u00abgas oxidante\u00bb se entiende el gas generado por la descomposici\u00f3n del fundente bajo la acci\u00f3n de altas temperaturas o por la reacci\u00f3n con el aluminio fundido, lo cual constituye un m\u00e9todo de fundente de reciente desarrollo. Sin embargo, en la pr\u00e1ctica genera gases como NO, NO\u2082, CO y HF, que pueden oxidar violentamente el aluminio fundido durante el proceso de purificaci\u00f3n.<\/p>","protected":false},"excerpt":{"rendered":"
Gas purifier purification refers to the introduction of gas into the aluminum melt or the substances that can produce purified gas. The partial pressure difference…<\/p>","protected":false},"author":1,"featured_media":11182,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[12802,4672],"class_list":["post-11178","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-degassing-with-inert-gas","tag-gas-purification-for-aluminum"],"yoast_head":"\n
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