{"id":8289,"date":"2021-03-31T06:17:19","date_gmt":"2021-03-31T06:17:19","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=8289"},"modified":"2021-03-31T06:17:19","modified_gmt":"2021-03-31T06:17:19","slug":"porous-refractory-filter","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/porous-refractory-filter\/","title":{"rendered":"Filtre r\u00e9fractaire poreux"},"content":{"rendered":"<p>Le m\u00e9tal en fusion traverse une s\u00e9rie d'\u00e9tapes de purification int\u00e9gr\u00e9es dispos\u00e9es en succession, dont une \u00e9tape d'\u00e9limination des scories, au cours de laquelle celles-ci sont s\u00e9par\u00e9es du m\u00e9tal en fusion \u00e0 l'aide de filtres r\u00e9fractaires tiss\u00e9s, ce qui permet d'\u00e9liminer les impuret\u00e9s particulaires de grande taille du m\u00e9tal en fusion. L'\u00e9tape de fusion \u00e9limine l'hydrog\u00e8ne m\u00e9tallique entra\u00een\u00e9 et dissous du m\u00e9tal en fusion ; elle est suivie d'une \u00e9tape d'adsorption et d'une \u00e9tape de filtration finale, au cours desquelles le m\u00e9tal en fusion passe \u00e0 travers plusieurs plaques r\u00e9fractaires qui adsorbent les impuret\u00e9s. L'\u00e9tape de filtration finale, au cours de laquelle le m\u00e9tal en fusion est filtr\u00e9 \u00e0 travers un milieu filtrant r\u00e9fractaire rigide et poreux afin d'\u00e9liminer les particules les plus fines.<\/p>\n<p>Dans un type d'op\u00e9ration de coul\u00e9e continue classique, l'aluminium ou un alliage de celui-ci est fondu dans un four, puis transf\u00e9r\u00e9, via d'autres r\u00e9cipients, vers le r\u00e9partiteur d'une machine de coul\u00e9e continue. L'aluminium fondu contient des oxydes d'autres m\u00e9taux pr\u00e9sents sous forme d'impuret\u00e9s, des oxydes non m\u00e9talliques et d'autres contaminants solides sous forme de particules, tels que, par exemple, des particules finement divis\u00e9es d'oxyde d'aluminium qui se forment \u00e0 la surface de l'aluminium fondu.<\/p>\n<p>De plus, les produits gazeux, en particulier l'hydrog\u00e8ne gazeux g\u00e9n\u00e9r\u00e9 par la r\u00e9action de l'aluminium fondu avec l'humidit\u00e9 pr\u00e9sente dans les diff\u00e9rents r\u00e9cipients du syst\u00e8me et dans l'environnement imm\u00e9diat, sont g\u00e9n\u00e9ralement pi\u00e9g\u00e9s ou dissous dans l'aluminium fondu. S'ils ne sont pas \u00e9limin\u00e9s du m\u00e9tal en fusion avant la coul\u00e9e, tant les particules que les produits gazeux peuvent contribuer \u00e0 la formation de vides et d'inclusions ind\u00e9sirables dans le m\u00e9tal coul\u00e9.<\/p>\n<p>Lorsque le m\u00e9tal coul\u00e9 est ensuite transform\u00e9 pour obtenir un produit fini, tel qu\u2019une tige ou un fil form\u00e9 en continu, les inclusions et les vides sont souvent \u00e0 l\u2019origine de d\u00e9fauts qui se traduisent par des cassures et des fissures dans le produit transform\u00e9, par des propri\u00e9t\u00e9s m\u00e9caniques m\u00e9diocres et par une diminution de la conductivit\u00e9 \u00e9lectrique du produit fini.<\/p>\n<p><a href=\"http:\/\/www.alalloycasting.com\/fr\/alumina-ceramic-foam-filter\/\">Filtre en mousse c\u00e9ramique d'alumine<\/a> Dans le domaine de la fonderie d'aluminium, il joue un r\u00f4le tr\u00e8s important dans le syst\u00e8me de purification de l'aluminium en fusion. Il s'agit d'un filtre r\u00e9fractaire poreux. Le filtre c\u00e9ramique destin\u00e9 \u00e0 la fonderie permet d'\u00e9liminer efficacement les grosses inclusions pr\u00e9sentes dans l'aluminium en fusion et de r\u00e9duire consid\u00e9rablement la taille des micro-inclusions, am\u00e9liorant ainsi la qualit\u00e9 de surface et les performances du produit.<\/p>","protected":false},"excerpt":{"rendered":"<p>The molten metal flows through a series of successively arranged integrated purification stages, including a slag removal stage, in which it is removed from the&hellip;<\/p>","protected":false},"author":1,"featured_media":8290,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-8289","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>Porous Refractory Filter,Alumina Ceramic Foam Filter<\/title>\n<meta name=\"description\" content=\"Alumina ceramic foam filter plays a very important role in the aluminum liquid purification system. It is a porous refractory filter.\" \/>\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\/fr\/porous-refractory-filter\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Porous Refractory Filter,Alumina Ceramic Foam Filter\" \/>\n<meta property=\"og:description\" content=\"Alumina ceramic foam filter plays a very important role in the aluminum liquid purification system. 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