{"id":9595,"date":"2021-07-15T06:36:28","date_gmt":"2021-07-15T06:36:28","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=9595"},"modified":"2021-07-15T06:36:28","modified_gmt":"2021-07-15T06:36:28","slug":"deep-bed-filtration-device","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/deep-bed-filtration-device\/","title":{"rendered":"Dispositivo de filtra\u00e7\u00e3o em leito profundo"},"content":{"rendered":"<p>O dispositivo de filtra\u00e7\u00e3o em leito profundo \u00e9 composto por v\u00e1rias camadas de esferas de alumina e camadas de cascalho. A sele\u00e7\u00e3o do tamanho das part\u00edculas do material filtrante e a distribui\u00e7\u00e3o das diferentes camadas desempenham um papel importante na otimiza\u00e7\u00e3o da efici\u00eancia da filtra\u00e7\u00e3o.<\/p>\n<p>Antes do enchimento com metal l\u00edquido, o leito filtrante deve atingir uma temperatura adequada para garantir que n\u00e3o ocorra solidifica\u00e7\u00e3o no leito. Ar seco ou outro tipo de g\u00e1s inerte \u00e9 circulado pelo filtro para pr\u00e9-aquecer o leito. O g\u00e1s \u00e9 introduzido na tampa, e o ar \u00e9 aquecido a uma temperatura elevada pelo fio de resist\u00eancia que irradia calor na tampa. Em seguida, ele \u00e9 conduzido para baixo, at\u00e9 o leito filtrante, e, atrav\u00e9s do tubo, at\u00e9 a sa\u00edda. A temperatura da opera\u00e7\u00e3o de pr\u00e9-aquecimento \u00e9 monitorada por um termopar inserido em um local espec\u00edfico no leito.<\/p>\n<p>Quando o dispositivo de filtra\u00e7\u00e3o de leito profundo atinge uma temperatura adequada para o carregamento, a opera\u00e7\u00e3o inicial de enchimento consiste em enviar o alum\u00ednio l\u00edquido para a camada de esferas de alumina e a camada plana de granulado de alumina do leito filtrante por meio do tubo de entrada, obtendo-se assim a camada necess\u00e1ria com a vaz\u00e3o adequada de alum\u00ednio l\u00edquido. O fluxo \u00e9 distribu\u00eddo uniformemente na parte inferior do leito filtrante e, em seguida, passa lentamente pelo leito at\u00e9 a superf\u00edcie.<\/p>\n<p>Quando a fundi\u00e7\u00e3o come\u00e7a, \u00e9 extremamente importante controlar a temperatura do leito filtrante durante todo o processo de manuten\u00e7\u00e3o do estado de fundi\u00e7\u00e3o. Como qualquer zona fria faz com que o metal se solidifique, isso afetar\u00e1 negativamente a efici\u00eancia da filtra\u00e7\u00e3o.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-9597\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2021\/07\/Deep-Bed-Filtration-Device-1.jpg\" alt=\"\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2021\/07\/Deep-Bed-Filtration-Device-1.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2021\/07\/Deep-Bed-Filtration-Device-1-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p>As vantagens do dispositivo de filtragem de leito profundo s\u00e3o uma camada espessa de filtro, um longo percurso de fluxo e a adsor\u00e7\u00e3o de muitas part\u00edculas de impurezas. Grande vaz\u00e3o, adequado para produ\u00e7\u00e3o em larga escala e em massa. No entanto, a filtra\u00e7\u00e3o em leito profundo utiliza apenas o material de enchimento para formar a camada filtrante, e o meio filtrante tende a se soltar e se deslocar facilmente, fazendo com que algumas pequenas impurezas sejam incorporadas \u00e0 massa fundida e reduzam o efeito de filtragem.<\/p>\n<p>Em compara\u00e7\u00e3o com o filtro de leito profundo, o <a href=\"http:\/\/www.alalloycasting.com\/pt\/ceramic-foam-filter-pal\/\">filtro de espuma cer\u00e2mica<\/a> possui uma camada de filtro mais fina e menos part\u00edculas de impurezas que podem ser adsorvidas. No entanto, isso pode ser melhorado aumentando o n\u00famero de est\u00e1gios de filtragem; ou seja, \u00e9 poss\u00edvel utilizar filtragem em dois ou tr\u00eas est\u00e1gios para melhorar a precis\u00e3o da filtragem. Suas vantagens s\u00e3o a baixa queda de press\u00e3o inicial, a facilidade de substitui\u00e7\u00e3o, a opera\u00e7\u00e3o simples e um melhor efeito de filtragem.<\/p>","protected":false},"excerpt":{"rendered":"<p>The deep bed filtration device consists of several layers of alumina balls and gravel layers. The particle size selection of the filter material and the&hellip;<\/p>","protected":false},"author":1,"featured_media":9596,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-9595","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Deep Bed Filtration Device, Molten Aluminum Filter<\/title>\n<meta name=\"description\" content=\"The deep bed filtration device consists of several layers of alumina balls and gravel layers. 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