{"id":10168,"date":"2021-09-02T07:49:17","date_gmt":"2021-09-02T07:49:17","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=10168"},"modified":"2021-09-07T08:43:50","modified_gmt":"2021-09-07T08:43:50","slug":"adsorption-purification-method","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/adsorption-purification-method\/","title":{"rendered":"M\u00e9thode de purification par adsorption"},"content":{"rendered":"<p>Le principe du proc\u00e9d\u00e9 de purification par adsorption repose sur le fait que la masse fondue d'alliage d'aluminium est mise en contact direct avec du N\u2082, du Cl\u2082 et d'autres gaz, ainsi qu'avec des adsorbants, des agents d'affinage et d'autres milieux, de sorte que les gaz et les inclusions d'oxydes solides interagissent avec ces milieux, ce qui permet d'\u00e9liminer les gaz et les inclusions pr\u00e9sents dans la masse fondue.<\/p>\n<p>La m\u00e9thode de purification par adsorption comprend principalement trois techniques : la m\u00e9thode par soufflage, la m\u00e9thode par filtration et la m\u00e9thode d'affinage par flux.<\/p>\n<p>La m\u00e9thode de soufflage, apparue dans les ann\u00e9es 1970, est un proc\u00e9d\u00e9 de purification de l'aluminium fondu qui pr\u00e9sente un effet tr\u00e8s marqu\u00e9 d'\u00e9limination de l'hydrog\u00e8ne. Son principe de base est le suivant : on injecte des gaz inertes, tels que l'azote et l'argon, dans la masse fondue d'alliage d'aluminium, ce qui provoque la formation d'un grand nombre de bulles \u00e0 l'int\u00e9rieur de celle-ci, ce qui entra\u00eene une diff\u00e9rence de pression d'hydrog\u00e8ne \u00e0 l'interface entre les bulles de gaz inerte et la solution d'alliage d'aluminium, for\u00e7ant ainsi l'hydrog\u00e8ne pr\u00e9sent dans le m\u00e9tal en fusion \u00e0 se diffuser continuellement dans les bulles de gaz inerte et \u00e0 \u00eatre \u00e9vacu\u00e9 de la surface du liquide en m\u00eame temps que ces bulles, ce qui permet d'\u00e9liminer l'hydrog\u00e8ne.<\/p>\n<p>De nombreux r\u00e9sultats de recherche ont montr\u00e9 que les inclusions et l'air sont interd\u00e9pendants, et que les inclusions sont \u00e9limin\u00e9es en m\u00eame temps que l'air. De nombreux r\u00e9sultats exp\u00e9rimentaux montrent que cette m\u00e9thode permet non seulement d\u2019\u00e9liminer l\u2019hydrog\u00e8ne pr\u00e9sent dans la masse fondue, mais contribue \u00e9galement \u00e0 \u00e9liminer les inclusions de l\u2019alliage d\u2019aluminium. On constate ainsi que cette m\u00e9thode a un effet positif sur la purification de la masse fondue. Avec le d\u00e9veloppement rapide des technologies d\u2019\u00e9limination de l\u2019hydrog\u00e8ne, en ligne <a href=\"http:\/\/www.alalloycasting.com\/fr\/degassing-purification-equipment\/\">\u00e9quipement de purification par d\u00e9gazage<\/a> est apparu, et l'efficacit\u00e9 de ce proc\u00e9d\u00e9 en mati\u00e8re d'\u00e9limination de l'hydrog\u00e8ne est tr\u00e8s \u00e9vidente.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-10105\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2021\/08\/Rotary-Metal-Degassing.jpg\" alt=\"D\u00e9gazage rotatif des m\u00e9taux\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2021\/08\/Rotary-Metal-Degassing.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2021\/08\/Rotary-Metal-Degassing-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p>Le proc\u00e9d\u00e9 de filtration fait appel \u00e0 un mat\u00e9riau neutre ou actif fourni par le fabricant pour filtrer et s\u00e9parer les inclusions solides pr\u00e9sentes dans le bain d'alliage d'aluminium en cours de traitement, afin de mettre en \u0153uvre un proc\u00e9d\u00e9 de purification du bain d'aluminium.<br \/>\nLe mat\u00e9riau filtrant est principalement constitu\u00e9 de tissu de verre, de billes de corindon et de mousse c\u00e9ramique. Parmi ces mat\u00e9riaux, la m\u00e9thode de filtration par tissu de verre pr\u00e9sente une grande adaptabilit\u00e9, un fonctionnement simple et pratique, ainsi qu\u2019un faible co\u00fbt, mais son efficacit\u00e9 de filtration est instable. Le <a href=\"http:\/\/www.alalloycasting.com\/fr\/foam-ceramic-filtration\/\">filtration sur c\u00e9ramique alv\u00e9ol\u00e9e<\/a> Cette m\u00e9thode se caract\u00e9rise par sa facilit\u00e9 d'utilisation et son efficacit\u00e9.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-10052\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2021\/08\/Molten-Metal-Filtration-Process.jpg\" alt=\"Proc\u00e9d\u00e9 de filtration du m\u00e9tal en fusion\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2021\/08\/Molten-Metal-Filtration-Process.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2021\/08\/Molten-Metal-Filtration-Process-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p>Le principe de la m\u00e9thode d'affinage par fondant consiste \u00e0 ajouter un fondant au bain d'alliage d'aluminium en fusion afin de provoquer une s\u00e9rie d'effets physiques et chimiques visant \u00e0 d\u00e9gazer et \u00e0 \u00e9liminer les impuret\u00e9s. \u00c9tant donn\u00e9 que l\u2019adsorption et la dissolution des inclusions oxyd\u00e9es dans le bain d\u2019alliage d\u2019aluminium, ainsi que l\u2019interaction chimique entre celles-ci, d\u00e9terminent l\u2019efficacit\u00e9 de l\u2019\u00e9limination des impuret\u00e9s par le fondant, cela peut facilement entra\u00eener une augmentation du co\u00fbt de la fusion et du risque d\u2019introduction d\u2019impuret\u00e9s dues \u00e0 des facteurs humains. Avec le d\u00e9veloppement rapide des technologies de purification du bain d\u2019alliage d\u2019aluminium, des fondants de traitement plus avanc\u00e9s, tels que les fondants granulaires, ont fait leur apparition les uns apr\u00e8s les autres, ce qui permet d\u2019am\u00e9liorer consid\u00e9rablement l\u2019efficacit\u00e9 de l\u2019\u00e9limination de l\u2019hydrog\u00e8ne.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-10079\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2021\/08\/Aluminum-Granular-Fluxes.jpg\" alt=\"Flux granulaires \u00e0 base d&#039;aluminium\" width=\"600\" height=\"500\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2021\/08\/Aluminum-Granular-Fluxes.jpg 600w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2021\/08\/Aluminum-Granular-Fluxes-300x250.jpg 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<p>La m\u00e9thode de purification par adsorption en fusion a \u00e9t\u00e9 mise en \u0153uvre dans la coul\u00e9e et le laminage directs de l'aluminium \u00e9lectrolytique liquide, et le proc\u00e9d\u00e9 de purification en fusion est utilis\u00e9, dans une certaine mesure, dans la production d'alliages d'aluminium tant en France qu'\u00e0 l'\u00e9tranger.<\/p>","protected":false},"excerpt":{"rendered":"<p>The mechanism of adsorption purification method is that the aluminum alloy melt is in direct contact with N2, Cl2 and other gases, adsorbents and refining&hellip;<\/p>","protected":false},"author":1,"featured_media":10169,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-10168","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>Adsorption 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