{"id":3616,"date":"2020-08-12T09:11:12","date_gmt":"2020-08-12T09:11:12","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=3616"},"modified":"2020-08-19T06:40:52","modified_gmt":"2020-08-19T06:40:52","slug":"molten-aluminum-filtration-method","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/molten-aluminum-filtration-method\/","title":{"rendered":"Proc\u00e9d\u00e9 de filtration de l'aluminium fondu"},"content":{"rendered":"<p>La m\u00e9thode de filtration de l'aluminium fondu consiste principalement \u00e0 faire passer l'aluminium fondu \u00e0 travers un filtre en c\u00e9ramique afin de s\u00e9parer les inclusions solides en suspension dans la masse fondue. Cette m\u00e9thode permet principalement d'\u00e9liminer les inclusions pr\u00e9sentes dans la masse fondue et n'a qu'un effet limit\u00e9 sur l'\u00e9limination de l'hydrog\u00e8ne. C'est pourquoi, dans la pratique, la m\u00e9thode de filtration de l'aluminium fondu est souvent associ\u00e9e \u00e0 la m\u00e9thode de soufflage.<\/p>\n<p>La m\u00e9thode de soufflage, \u00e9galement appel\u00e9e \u00ab m\u00e9thode de flottation par bulles \u00bb, est un proc\u00e9d\u00e9 de purification de l'aluminium fondu mis au point dans les ann\u00e9es 1970, particuli\u00e8rement efficace pour l'\u00e9limination de l'hydrog\u00e8ne. Un gaz inerte (tel que l'azote, l'argon, etc.) est introduit dans l'aluminium fondu afin de former des bulles. Sous l'effet de la diff\u00e9rence de pression partielle, l'hydrog\u00e8ne pr\u00e9sent dans le bain fondu se diffuse dans ces bulles et est \u00e9limin\u00e9 au fur et \u00e0 mesure que celles-ci remontent \u00e0 la surface, ce qui permet d'atteindre l'objectif de d\u00e9gazage. Au cours du processus de flottation, les bulles peuvent \u00e9galement absorber certaines inclusions oxyd\u00e9es, ce qui permet d'\u00e9liminer les impuret\u00e9s.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-3619\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/08\/Molten-Aluminum-Filtration-Method-1-1.jpg\" alt=\"Proc\u00e9d\u00e9 de filtration de l&#039;aluminium fondu\" width=\"400\" height=\"320\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/08\/Molten-Aluminum-Filtration-Method-1-1.jpg 400w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/08\/Molten-Aluminum-Filtration-Method-1-1-300x240.jpg 300w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/p>\n<p>Avec le renforcement des exigences en mati\u00e8re de puret\u00e9 de la masse fondue, la technologie d'\u00e9limination de l'hydrog\u00e8ne a \u00e9t\u00e9 am\u00e9lior\u00e9e et a \u00e9volu\u00e9, passant de l'injection \u00e0 tube unique d'origine \u00e0 la t\u00eate de soufflage \u00e0 plusieurs orifices, puis \u00e0 la buse rotative actuelle. Depuis les ann\u00e9es 1980, la m\u00e9thode de soufflage par buse rotative est devenue la principale tendance de d\u00e9veloppement des technologies avanc\u00e9es de purification de l'aluminium \u00e0 l'\u00e9tranger. Par exemple, le syst\u00e8me en ligne <a href=\"http:\/\/www.alalloycasting.com\/fr\/degassing-system\/\">syst\u00e8me de d\u00e9gazage<\/a> par Adtech, m\u00e9thode de flottation par gaz inerte \u00e0 buses rotatives. L'\u00e9quipement est dot\u00e9 de deux buses rotatives en graphite. Le gaz forme de petites bulles dispers\u00e9es gr\u00e2ce au rotor de la buse. Parall\u00e8lement, le rotor agitant le bain fondu, les bulles se dispersent uniform\u00e9ment dans l\u2019ensemble du bain, ce qui augmente la surface de contact entre le gaz et le liquide, prolonge la distance parcourue et le temps de s\u00e9jour des bulles dans l\u2019aluminium fondu, augmente le volume de gaz et favorise l\u2019absorption du gaz par le bain fondu, tandis que les inclusions d\u2019oxyde remontent \u00e0 la surface du bain, permettant ainsi d\u2019obtenir un effet de purification par d\u00e9gazage et \u00e9limination des impuret\u00e9s. L\u2019efficacit\u00e9 de l\u2019\u00e9limination de l\u2019hydrog\u00e8ne de cette m\u00e9thode est environ trois fois sup\u00e9rieure \u00e0 celle de la m\u00e9thode d\u2019injection \u00e0 tube unique.<\/p>\n<p>Il existe de nombreux types de filtration, parmi lesquels les plus performants sont le tube filtrant en corindon et la plaque filtrante en c\u00e9ramique alv\u00e9ol\u00e9e. Le tube filtrant en corindon offre une grande efficacit\u00e9 de filtration, mais il est co\u00fbteux et peu pratique \u00e0 utiliser. La plaque filtrante en c\u00e9ramique alv\u00e9ol\u00e9e est un nouveau type de mat\u00e9riau filtrant c\u00e9ramique mis au point ces derni\u00e8res ann\u00e9es. Elle se caract\u00e9rise par sa facilit\u00e9 d\u2019utilisation, son bon rendement de filtration et son faible co\u00fbt. Il est largement utilis\u00e9 dans le monde entier. La fonte d\u2019alliage d\u2019aluminium de type 50% et sup\u00e9rieur des pays d\u00e9velopp\u00e9s est filtr\u00e9e \u00e0 l\u2019aide de filtres en c\u00e9ramique alv\u00e9ol\u00e9e. \u00c0 l\u2019heure actuelle, la technologie des filtres en c\u00e9ramique alv\u00e9ol\u00e9e de type caisson est largement r\u00e9pandue. Il s\u2019agit d\u2019un <a href=\"http:\/\/www.alalloycasting.com\/fr\/cff-filter-box\/\">Bo\u00eetier de filtre CFF<\/a> \u00e9quip\u00e9 d'un syst\u00e8me de pr\u00e9chauffage au gaz. Lorsque l'aluminium liquide traverse la plaque filtrante, les inclusions pr\u00e9sentes dans la masse fondue franchissent la barri\u00e8re m\u00e9canique du filtre, ce qui permet de les \u00e9liminer et de les s\u00e9parer. La pr\u00e9cision de filtration peut atteindre 2 \u03bcm et l'efficacit\u00e9 de filtration peut atteindre 99%.<\/p>","protected":false},"excerpt":{"rendered":"<p>Molten aluminum filtration method is mainly to let the aluminum melt pass through the ceramic filter to separate the solid inclusions suspended in the melt.&hellip;<\/p>","protected":false},"author":1,"featured_media":3618,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[138],"tags":[4345,1695,1697,1685,1683,1678,1687,1690,1698,1699,21,1694,1677,1691,1684,420,419,1682,1679,1686,484,89,1696,483,1688,1692,1693,223,1689,752],"class_list":["post-3616","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-seo","tag-alumina-ceramic","tag-alumina-ceramic-foam-filter-aluminum-casting-industry","tag-alumina-ceramic-foam-filter-for-casting-metal-purification","tag-alumina-ceramic-foam-filter-for-molten-aluminum-filtration","tag-alumina-ceramic-foam-filter-manufacturers","tag-alumina-ceramic-foam-filter-plate","tag-alumina-ceramic-foam-filter-porous-ceramic-filter","tag-alumina-filter-ceramic-foam-for-precision-casting-filter","tag-aluminum-casting-using-alumina-ceramic-foam-filter","tag-ceralu-ai203-ceramic-foam-filters-for-aluminum","tag-ceramic-foam-filter","tag-ceramic-foam-filter-cff-a-for-aluminum-casting","tag-ceramic-foam-filter-for-liquid-aluminum","tag-ceramic-foam-filter-with-fiber-blanket-sides","tag-china-ceramic-foam-filter-cff","tag-foam-filter","tag-foam-filter-material","tag-foam-filters-with-gasket","tag-high-grade-ceramic-foam-filters","tag-industrial-filters-for-filtration-of-molten-aluminium","tag-liquid-aluminum-filter","tag-molten-aluminum-filter","tag-molten-metal-cleanliness-when-casting-aluminium","tag-molten-metal-filter","tag-porous-silicon-carbide-ceramic-foam-filter","tag-produce-alumina-ceramic-foam-filters","tag-produce-aluminium-casting-ceramic-foam-filters","tag-sell-ceramic-foam-filters","tag-square-porous-alumina-ceramic-foam-filter","tag-zirconia-ceramic-foam-filter"],"yoast_head":"<!-- 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