{"id":7678,"date":"2021-01-21T07:51:02","date_gmt":"2021-01-21T07:51:02","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=7678"},"modified":"2021-01-21T07:51:02","modified_gmt":"2021-01-21T07:51:02","slug":"aluminum-melt-filtering","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/aluminum-melt-filtering\/","title":{"rendered":"Filtration de l'aluminium en fusion"},"content":{"rendered":"

Avant toute transformation ult\u00e9rieure (coul\u00e9e en lingots ou en pi\u00e8ces moul\u00e9es), l'aluminium fondu est filtr\u00e9, ce qui est presque toujours n\u00e9cessaire. La m\u00e9thode de filtration d\u00e9pend de la technique de coul\u00e9e utilis\u00e9e ou du mode de transformation de l'aluminium fondu. On consid\u00e8re g\u00e9n\u00e9ralement que cette op\u00e9ration n'est possible et avantageuse que lorsqu'une quantit\u00e9 suffisante de m\u00e9tal est utilis\u00e9e.<\/p>\n

La densit\u00e9 des inclusions \u00e9tant diff\u00e9rente de celle de l'aluminium fondu, celles-ci restent immobiles, ce qui fait qu'elles flottent dans l'aluminium fondu ou se d\u00e9posent au fond de celui-ci. Il est donc possible de s\u00e9parer les inclusions de l'aluminium fondu. Cependant, l'efficacit\u00e9 de cette s\u00e9paration est extr\u00eamement faible. Cela s'explique par le fait que la diff\u00e9rence de densit\u00e9 entre chaque inclusion et l'aluminium fondu n'est pas suffisante, et que la mouillabilit\u00e9 entre les deux est assez importante. Il en r\u00e9sulte donc un probl\u00e8me : m\u00eame si cette m\u00e9thode prend beaucoup de temps, un grand nombre d'inclusions subsiste dans l'aluminium fondu.<\/p>\n

Selon la m\u00e9thode au gaz r\u00e9actif, un gaz inerte ou un gaz halog\u00e9n\u00e9 est introduit dans l'aluminium fondu afin de g\u00e9n\u00e9rer des bulles. Les inclusions se fixent aux bulles et flottent ensemble dans l'aluminium fondu, ce qui permet de s\u00e9parer les inclusions de l'aluminium fondu. Cette m\u00e9thode est particuli\u00e8rement avantageuse pour \u00e9liminer des gaz tels que l'hydrog\u00e8ne. Cependant, les bulles qui remontent \u00e0 la surface agitent violemment celle de l'aluminium fondu, ce qui provoque son brassage. Cela pose un autre probl\u00e8me : le film d'oxyde d'aluminium form\u00e9 \u00e0 la surface de l'aluminium fondu risque d'\u00eatre r\u00e9incorpor\u00e9 dans la masse fondue, entra\u00eenant ainsi une augmentation du nombre d'inclusions d'oxyde d'aluminium.<\/p>\n

\"Filtres<\/p>\n

Parmi les pi\u00e8ces moul\u00e9es en aluminium, filtres en mousse c\u00e9ramique<\/a> sont les plus couramment utilis\u00e9es pour la filtration de l'aluminium en fusion. Il s'agit g\u00e9n\u00e9ralement de plaques carr\u00e9es mesurant 178 x 660 et d'une \u00e9paisseur de 50 mm. Elles sont fabriqu\u00e9es en introduisant de la mousse polym\u00e8re poreuse dans une suspension c\u00e9ramique liquide. La mousse enrob\u00e9e de c\u00e9ramique est ensuite s\u00e9ch\u00e9e et cuite afin d\u2019\u00e9liminer le liant polym\u00e8re. On obtient ainsi une r\u00e9plique en c\u00e9ramique de la structure originale de la mousse organique. Le filtre en mousse c\u00e9ramique peut \u00eatre utilis\u00e9 aussi bien dans les grandes fonderies industrielles que dans les petites fonderies, notamment pour filtrer le m\u00e9tal lors de la coul\u00e9e de chaque pi\u00e8ce.<\/p>","protected":false},"excerpt":{"rendered":"

Before further processing (casting into ingots or castings), the aluminum melt is melted and then almost always requires filtering. The filtering method depends on the…<\/p>","protected":false},"author":1,"featured_media":7679,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-7678","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nAluminum Melt Filtering - Square Ceramic Foam Filters<\/title>\n<meta name=\"description\" content=\"Among aluminum castings, ceramic foam filters are the most commonly used for aluminum melt filtering. 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Usually, they are square plates..\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.alalloycasting.com\/fr\/aluminum-melt-filtering\/\" \/>\n<meta property=\"og:site_name\" content=\"alalloycasting\" \/>\n<meta property=\"article:published_time\" content=\"2021-01-21T07:51:02+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2021\/01\/Aluminum-Melt-Filtering.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"500\" \/>\n\t<meta property=\"og:image:height\" content=\"400\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"AdTech\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"AdTech\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.alalloycasting.com\\\/aluminum-melt-filtering\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.alalloycasting.com\\\/aluminum-melt-filtering\\\/\"},\"author\":{\"name\":\"AdTech\",\"@id\":\"https:\\\/\\\/www.alalloycasting.com\\\/#\\\/schema\\\/person\\\/431d9c832111002d5e0bf6dc57a33c20\"},\"headline\":\"Aluminum Melt Filtering\",\"datePublished\":\"2021-01-21T07:51:02+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.alalloycasting.com\\\/aluminum-melt-filtering\\\/\"},\"wordCount\":366,\"publisher\":{\"@id\":\"https:\\\/\\\/www.alalloycasting.com\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.alalloycasting.com\\\/aluminum-melt-filtering\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.alalloycasting.com\\\/wp-content\\\/uploads\\\/2021\\\/01\\\/Aluminum-Melt-Filtering.jpg\",\"articleSection\":[\"Blog\"],\"inLanguage\":\"fr-FR\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.alalloycasting.com\\\/aluminum-melt-filtering\\\/\",\"url\":\"https:\\\/\\\/www.alalloycasting.com\\\/aluminum-melt-filtering\\\/\",\"name\":\"Aluminum Melt Filtering - Square Ceramic Foam Filters\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.alalloycasting.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.alalloycasting.com\\\/aluminum-melt-filtering\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.alalloycasting.com\\\/aluminum-melt-filtering\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.alalloycasting.com\\\/wp-content\\\/uploads\\\/2021\\\/01\\\/Aluminum-Melt-Filtering.jpg\",\"datePublished\":\"2021-01-21T07:51:02+00:00\",\"description\":\"Among aluminum castings, ceramic foam filters are the most commonly used for aluminum melt filtering. 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