{"id":790,"date":"2020-04-10T09:14:16","date_gmt":"2020-04-10T09:14:16","guid":{"rendered":"http:\/\/alalloycasting.com\/?p=790"},"modified":"2020-08-26T09:15:19","modified_gmt":"2020-08-26T09:15:19","slug":"alumina-refines","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/alumina-refines\/","title":{"rendered":"Refiner\u00edas de al\u00famina"},"content":{"rendered":"

La producci\u00f3n mensual de al\u00famina en China aument\u00f3 significativamente en marzo, seg\u00fan revelan los datos de producci\u00f3n de primera mano de las refiner\u00edas de al\u00famina chinas recopilados por el Shanghai Metals Market. El volumen de producci\u00f3n de al\u00famina del mes pasado ascendi\u00f3 a 5 831 000 toneladas, lo que supone un aumento del 27 % con respecto a marzo de 2016 y del 12,45 % respecto a febrero de este a\u00f1o. La producci\u00f3n total de al\u00famina de febrero se estim\u00f3 en 5 185 000 toneladas.<\/p>\n

Refiner\u00edas de al\u00famina<\/h2>\n

Durante los tres primeros meses de 2017, es decir, entre enero y febrero, China produjo 16 600 000 toneladas de al\u00famina. Este volumen supone un aumento del 24 % con respecto a la al\u00famina producida en el mismo periodo del a\u00f1o anterior.<\/p>\n

Seg\u00fan las estimaciones de SMM, la producci\u00f3n de al\u00famina en el mercado nacional chino durante el mes de abril descender\u00e1 un 2,48 % respecto al mes anterior, hasta situarse en 5 686 000 toneladas.<\/p>\n

La producci\u00f3n de aluminio primario de China en marzo aument\u00f3 un 23 % con respecto al a\u00f1o anterior, hasta alcanzar un total de 3 112 000 toneladas. La producci\u00f3n acumulada durante los tres primeros meses de 2017 se estim\u00f3 en 8 988 000 toneladas, lo que supone un aumento del 22,1 % respecto al mismo periodo del a\u00f1o anterior. Se estima que, en abril, China producir\u00e1 3 041 000 toneladas de aluminio, lo que supone un descenso del 2,28 % respecto al mes anterior.<\/p>\n

\"Refiner\u00edas<\/p>\n

La purificaci\u00f3n electrol\u00edtica se lleva a cabo, preferiblemente, mediante el conocido proceso de electrolito de tres capas, que la industria del aluminio lleva utilizando desde hace mucho tiempo, o mediante la c\u00e9lula de electrolito bipolar descrita en la solicitud de patente de EE. UU. n.\u00ba 630.289. Se emplea una c\u00e9lula bipolar, en particular, si el chatarra de aluminio<\/a> tiene una alta concentraci\u00f3n de silicio y\/o hierro, ya que as\u00ed se pueden evitar las grandes p\u00e9rdidas de cobre que se producen en el proceso de tres capas.<\/p>\n

La cantidad de sal necesaria para llevar a cabo el proceso seg\u00fan la invenci\u00f3n se calcula de tal manera que sea, preferiblemente, entre 1,2 y 2 veces, y en particular 1,5 veces, mayor que el peso de la chatarra que se va a purificar. Las cargas de sales empleadas comprenden, de manera \u00fatil, entre un 30 y un 50 % en peso de NaCl, entre un 30 y un 50 % en peso de KCl y entre un 15 y un 25 % en peso de criolita. Una masa fundida que ha resultado especialmente ventajosa contiene aproximadamente un 40 % en peso de NaCl, un 40 % en peso de KCl y un 20 % en peso de criolita, manteni\u00e9ndose dicha masa fundida a una temperatura de aproximadamente 750 \u00b0C antes de a\u00f1adirle la chatarra de aluminio precalentada. Especialmente cuando la chatarra se presenta en trozos peque\u00f1os, puede resultar ventajoso, antes de mantener la temperatura, agitar la mezcla fundida de sales y chatarra de aluminio. El efecto principal de esto es reducir la concentraci\u00f3n de magnesio en la chatarra de aluminio. La agitaci\u00f3n se lleva a cabo mediante medios mec\u00e1nicos conocidos, por ejemplo, utilizando un agitador magn\u00e9tico o mediante la inyecci\u00f3n de gases inertes.<\/p>\n

La acci\u00f3n purificadora del ba\u00f1o de sal fundida puede potenciarse utilizando un gas de lavado convencional, como el cloro, antes del almacenamiento.<\/p>\n

Durante el tiempo de reposo, que dura preferiblemente entre 1 y 2 horas, las gotitas de aluminio se depositan en el fondo del recipiente de reposo, para lo cual el horno de fusi\u00f3n tambi\u00e9n resulta muy \u00fatil.<\/p>","protected":false},"excerpt":{"rendered":"

Monthly alumina output in China rose significantly in March, revealed first-hand production data of the Chinese alumina refines factory as surveyed by the Shanghai Metals…<\/p>","protected":false},"author":1,"featured_media":1904,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[142],"class_list":["post-790","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-alumina-refines"],"yoast_head":"\nAlumina Refines | Aluminum Casting Foundry Flux<\/title>\n<meta name=\"description\" content=\"Monthly alumina output in China rose significantly, revealed production data of the Chinese alumina refines as surveyed by the Metals Market.\" \/>\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\/alumina-refines\/\" 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