{"id":1186,"date":"2020-04-17T06:55:50","date_gmt":"2020-04-17T06:55:50","guid":{"rendered":"http:\/\/alalloycasting.com\/?p=1186"},"modified":"2020-08-28T06:52:04","modified_gmt":"2020-08-28T06:52:04","slug":"aluminum-purification-technology","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/aluminum-purification-technology\/","title":{"rendered":"Technologie de purification de l'aluminium"},"content":{"rendered":"<p>L'utilisation de pi\u00e8ces moul\u00e9es en alliage d'aluminium est en augmentation, et les exigences auxquelles elles doivent r\u00e9pondre sont de plus en plus strictes. Outre le respect de la composition chimique, des propri\u00e9t\u00e9s m\u00e9caniques et de la pr\u00e9cision dimensionnelle, les pi\u00e8ces moul\u00e9es en alliage d'aluminium ne doivent pr\u00e9senter aucun d\u00e9faut de coul\u00e9e, tels que des trous de retrait, des poches d'air ou des poches de scories. La technologie de purification de l\u2019aluminium consiste en un traitement complet alliant purification et affinage du grain, permettant d\u2019obtenir des alliages d\u2019aluminium de haute qualit\u00e9. Le <a href=\"https:\/\/www.alalloycasting.com\/fr\/refining-flux\/\">effet purifiant<\/a> La composition de l'aluminium fondu a une influence importante sur la formation de pores, de trous de retrait et d'inclusions, et affecte directement les propri\u00e9t\u00e9s physiques et m\u00e9caniques des pi\u00e8ces moul\u00e9es en alliage d'aluminium.<\/p>\n<h2>Technologie de purification de l'aluminium liquide<\/h2>\n<p><a href=\"https:\/\/www.alalloycasting.com\/fr\/molten-aluminum-purifying-units\/\">Traitement de purification de l'aluminium liquide<\/a> En fonction du m\u00e9canisme de purification, on distingue les technologies de purification par adsorption et celles sans adsorption. La technologie de purification de l'aluminium consiste en un traitement global alliant purification et affinage du grain, permettant d'obtenir des alliages d'aluminium de haute qualit\u00e9.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-4281\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/04\/Aluminum-Purification-Technology-1.jpg\" alt=\"Technologie de purification de l&#039;aluminium\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/04\/Aluminum-Purification-Technology-1.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/04\/Aluminum-Purification-Technology-1-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<h2>Purification par adsorption<\/h2>\n<p>La purification par adsorption repose principalement sur l'adsorption des inclusions oxyd\u00e9es produites par l'agent d'affinage ; elle \u00e9limine simultan\u00e9ment ces inclusions oxyd\u00e9es ainsi que l'hydrog\u00e8ne fix\u00e9 \u00e0 la surface, ce qui permet d'atteindre l'objectif de purification de l'aluminium liquide. La purification non par adsorption repose sur d\u2019autres effets physiques et chimiques pour purifier l\u2019aluminium liquide. La purification par adsorption ne se produit qu\u2019\u00e0 l\u2019interface d\u2019adsorption, tandis que la purification non par adsorption agit simultan\u00e9ment sur l\u2019ensemble de l\u2019aluminium liquide.<\/p>\n<p>Les m\u00e9thodes d'adsorption comprennent principalement la purge au gaz inerte, la purge au gaz actif, la purge au m\u00e9lange de gaz, la purification aux sels de chlorure et les m\u00e9thodes non toxiques <a href=\"https:\/\/www.alalloycasting.com\/fr\/refining-flux\/\">agent de raffinage<\/a> la purification et la purification par solvant. Les m\u00e9thodes sans adsorption comprennent principalement la purification sous vide, la purification par ultrasons, la purification \u00e9lectromagn\u00e9tique, la cristallisation sous pression, la fixation de l'hydrog\u00e8ne par des \u00e9l\u00e9ments de terres rares, etc.<\/p>\n<h2>Raffinage de gaz mixtes<\/h2>\n<p>Lors de l'affinage au chlore gazeux dans le cadre de la technologie de purification par adsorption, le chlore gazeux et l'aluminium liquide g\u00e9n\u00e8rent du trichlorure d'aluminium, tandis que le trichlorure d'aluminium et l'hydrog\u00e8ne produisent du chlorure d'hydrog\u00e8ne, qui a des effets \u00e0 la fois physiques et chimiques. L'effet d'affinage est \u00e9vident, mais ce proc\u00e9d\u00e9 pollue l'environnement et est nocif pour la sant\u00e9 humaine. Par la suite, on a eu recours \u00e0 des gaz inertes (azote et argon) pour l'affinage, et m\u00eame \u00e0 du gaz inerte de puret\u00e9 99,999%, mais les r\u00e9sultats n'\u00e9taient pas satisfaisants et les co\u00fbts ont augment\u00e9. Diverses m\u00e9thodes sont utilis\u00e9es pour am\u00e9liorer le processus d'affinage, mais les r\u00e9sultats obtenus avec l'affinage au chlore ne sont pas toujours atteints.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-4282\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/04\/Aluminum-Purification-Technology-2.jpg\" alt=\"Technologie de purification de l&#039;aluminium\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/04\/Aluminum-Purification-Technology-2.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/04\/Aluminum-Purification-Technology-2-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p>Ces derni\u00e8res ann\u00e9es, plusieurs pays ont adopt\u00e9 le proc\u00e9d\u00e9 d'affinage par m\u00e9lange de gaz, c'est-\u00e0-dire un m\u00e9lange de gaz inerte et de gaz actif, qui permet d'\u00e9liminer les inclusions pr\u00e9sentes dans l'alliage d'aluminium tout en renfor\u00e7ant la d\u00e9shydrog\u00e9nation de la masse fondue, et qui forme un laitier sec \u00e0 la surface de celle-ci, ce qui permet d'obtenir un bon r\u00e9sultat d'affinage. De plus, ce proc\u00e9d\u00e9 permet de contr\u00f4ler facilement la quantit\u00e9 de chlore gazeux ajout\u00e9e et a un faible impact sur l'environnement.<\/p>\n<p>Dans le domaine de la technologie de purification par adsorption, l\u2019innovation et la transformation des proc\u00e9d\u00e9s ont \u00e9galement permis de mettre au point de nombreuses m\u00e9thodes pratiques de traitement des liquides d\u2019aluminium : par exemple, le d\u00e9gazage rotatif sous gaz inerte, la filtration sur mousse c\u00e9ramique, le traitement par pulv\u00e9risation de poudre, ainsi que le d\u00e9gazage rotatif associ\u00e9 \u00e0 la pulv\u00e9risation de poudre. Plusieurs m\u00e9thodes. Dans le domaine des technologies de purification sans adsorption, la m\u00e9thode de fixation de l'hydrog\u00e8ne par des \u00e9l\u00e9ments de terres rares constitue \u00e9galement l'une des orientations de d\u00e9veloppement futures.<\/p>","protected":false},"excerpt":{"rendered":"<p>The use of aluminum alloy castings is increasing, and the requirements for castings are becoming higher and higher. In addition to ensuring chemical composition, mechanical&hellip;<\/p>","protected":false},"author":1,"featured_media":4280,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233,138],"tags":[38,1186,1185,1179,1169,1183,1157,1165,1180,1170,1182,1181,1173,1172,1171,1178,1184,1158,1152,1151,1155,1164,1156,1174,1176,1159,1175,1161,1168,1167,1166,1160,1150,1153,1177,1162,1163],"class_list":["post-1186","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-seo","tag-aluminum-purification-technology","tag-aluminum-purification-technology-aluminium-casting-company","tag-aluminum-purification-technology-aluminium-die-casting-companies","tag-aluminum-purification-technology-aluminium-gravity-die-casting","tag-aluminum-purification-technology-aluminium-hot-top","tag-aluminum-purification-technology-aluminium-investment-casting","tag-aluminum-purification-technology-aluminium-strip","tag-aluminum-purification-technology-aluminum-billet-casting","tag-aluminum-purification-technology-aluminum-can-foundry","tag-aluminum-purification-technology-aluminum-casting-companies","tag-aluminum-purification-technology-aluminum-casting-equipment","tag-aluminum-purification-technology-aluminum-casting-grain","tag-aluminum-purification-technology-aluminum-casting-near-me","tag-aluminum-purification-technology-aluminum-die-casting-companies","tag-aluminum-purification-technology-aluminum-foundry-near-me","tag-aluminum-purification-technology-aluminum-gravity-casting","tag-aluminum-purification-technology-aluminum-gravity-die-casting","tag-aluminum-purification-technology-aluminum-ingot","tag-aluminum-purification-technology-cast-aluminum","tag-aluminum-purification-technology-castable-refractory","tag-aluminum-purification-technology-ceramic-insulation","tag-aluminum-purification-technology-ceramic-shell-casting","tag-aluminum-purification-technology-continuous-casting","tag-aluminum-purification-technology-die-casting-companies-near-me","tag-aluminum-purification-technology-electric-aluminum-foundry","tag-aluminum-purification-technology-foundry","tag-aluminum-purification-technology-foundry-aluminum-casting","tag-aluminum-purification-technology-foundry-factory","tag-aluminum-purification-technology-hot-top-aluminium","tag-aluminum-purification-technology-hot-top-cast","tag-aluminum-purification-technology-hot-top-casting","tag-aluminum-purification-technology-metal-foundry","tag-aluminum-purification-technology-metallurgy-company","tag-aluminum-purification-technology-molten-aluminum","tag-aluminum-purification-technology-molten-aluminum-casting","tag-aluminum-purification-technology-shell-casting","tag-aluminum-purification-technology-shell-mould-casting"],"yoast_head":"<!-- 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