{"id":6620,"date":"2021-04-04T12:32:53","date_gmt":"2021-04-04T12:32:53","guid":{"rendered":"https:\/\/www.aluminaceramicball.com\/?p=6620"},"modified":"2021-04-12T06:48:56","modified_gmt":"2021-04-12T06:48:56","slug":"explicacion-detallada-de-los-parametros-del-polvo-de-alumina","status":"publish","type":"post","link":"https:\/\/www.aluminaceramicball.com\/es\/explicacion-detallada-de-los-parametros-del-polvo-de-alumina\/","title":{"rendered":"Explicaci\u00f3n detallada de los par\u00e1metros del polvo de al\u00famina"},"content":{"rendered":"

En la actualidad, la al\u00famina en polvo<\/a> producidas por el proceso Bayer representan m\u00e1s de 90% de la producci\u00f3n total, la mayor\u00eda de las cuales se utilizan para fabricar aluminio met\u00e1lico, y menos de 10% se destinan a otros fines.<\/p>\n

Polvo de al\u00famina<\/a> es la al\u00famina, s\u00edmbolo qu\u00edmico Al2O3, peso molecular 102, al\u00famina pura es polvo amorfo blanco, com\u00fanmente conocido como bauxita, densidad 3.9-4.0g\/cm3, punto de fusi\u00f3n 2050\u2103, punto de ebullici\u00f3n 2980\u2103, insoluble en agua, \u00f3xido anf\u00f3tero, soluble en \u00e1cido inorg\u00e1nico y soluci\u00f3n alcalina, hay cuatro al\u00f3tropos \u03b2-al\u00famina \u03b4-al\u00famina v-al\u00famina a-al\u00famina, y hay principalmente dos variantes de tipo \u03b1 y tipo \u03b3 , Industrialmente se puede extraer de la bauxita.<\/p>\n

En la red cristalina de la al\u00famina de tipo \u03b1, los iones de ox\u00edgeno est\u00e1n densamente empaquetados en hex\u00e1gonos, y el Al3+ est\u00e1 distribuido sim\u00e9tricamente en el centro de coordinaci\u00f3n octa\u00e9drico rodeado de iones de ox\u00edgeno. La energ\u00eda de la red es grande, por lo que el punto de fusi\u00f3n y el punto de ebullici\u00f3n son altos. La al\u00famina de tipo \u03b1 es insoluble en agua y en \u00e1cido. Tambi\u00e9n se denomina \u00f3xido de aluminio en la industria. Es la materia prima b\u00e1sica para fabricar aluminio met\u00e1lico. Tambi\u00e9n se utiliza para fabricar diversos ladrillos refractarios, crisoles refractarios, tubos refractarios e instrumentos de prueba de alta temperatura; tambi\u00e9n puede utilizarse como abrasivo, retardante de llama, relleno, etc.; la al\u00famina de tipo \u03b1 de gran pureza tambi\u00e9n es la materia prima para la producci\u00f3n de corind\u00f3n artificial, rub\u00ed artificial y zafiro; tambi\u00e9n se utiliza para la producci\u00f3n de circuitos integrados modernos a gran escala.<\/p>\n

La al\u00famina de tipo \u03b3 se produce por deshidrataci\u00f3n del hidr\u00f3xido de aluminio a una temperatura baja de 140-150\u00b0C. En la industria tambi\u00e9n se denomina al\u00famina activada y cola de aluminio. En su estructura, los iones de ox\u00edgeno est\u00e1n aproximadamente densamente empaquetados en planos verticales, y el Al3+ est\u00e1 irregularmente distribuido en los huecos octa\u00e9dricos y tetra\u00e9dricos rodeados de iones de ox\u00edgeno. La al\u00famina de tipo \u03b3 es insoluble en agua, pero puede disolverse en \u00e1cido fuerte o soluci\u00f3n alcalina fuerte. Cuando se calienta a 1200\u2103, se convierte completamente en al\u00famina de tipo \u03b1. La al\u00famina de tipo \u03b3 es un material poroso, con una superficie interna de hasta varios cientos de metros cuadrados por gramo, con alta actividad y fuerte capacidad de adsorci\u00f3n. Los productos industriales suelen ser part\u00edculas cil\u00edndricas incoloras o ligeramente rosadas con buena resistencia a la presi\u00f3n. Se utiliza com\u00fanmente como adsorbente, catalizador y portador de catalizador en el refinado de petr\u00f3leo y la industria petroqu\u00edmica; se utiliza como agente de desacidificaci\u00f3n para aceite de transformador y aceite de turbina en la industria; tambi\u00e9n se utiliza para el an\u00e1lisis de cromatograf\u00eda; en laboratorio, es desecante fuerte neutro Su capacidad de secado no es inferior a la del pent\u00f3xido de f\u00f3sforo. Tras su uso, puede regenerarse y reutilizarse despu\u00e9s de calentarlo a 175\u00b0C durante 6-8h.<\/p>","protected":false},"excerpt":{"rendered":"

At present, the world’s alumina powder produced by Bayer process accounts for more than 90% of the total output, most of which are used to make metal aluminum, and less than 10% are used for other purposes. Alumina powder is alumina, chemical symbol: Al2O3, molecular weight 102, pure alumina is white amorphous powder, commonly known 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