{"id":11459,"date":"2021-11-25T09:20:28","date_gmt":"2021-11-25T09:20:28","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=11459"},"modified":"2021-11-25T09:20:28","modified_gmt":"2021-11-25T09:20:28","slug":"aluminium-liquid-degasser","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/aluminium-liquid-degasser\/","title":{"rendered":"D\u00e9gazeur pour aluminium liquide"},"content":{"rendered":"<p>Dans le proc\u00e9d\u00e9 rotatif du d\u00e9gazeur d'aluminium liquide, un gaz inerte ou chimiquement inactif (argon, azote) est inject\u00e9 \u00e0 travers un arbre rotatif et un rotor.<\/p>\n<p>L'\u00e9nergie g\u00e9n\u00e9r\u00e9e par l'arbre en rotation entra\u00eene la formation d'un grand nombre de fines bulles, ce qui permet d'obtenir un rapport surface\/volume tr\u00e8s \u00e9lev\u00e9.<\/p>\n<p>La grande surface sp\u00e9cifique favorise une diffusion rapide et efficace de l'hydrog\u00e8ne dans les bulles de gaz, ce qui contribue \u00e0 \u00e9quilibrer l'activit\u00e9 de l'hydrog\u00e8ne dans les phases liquide et gazeuse.<\/p>\n<p>L'unit\u00e9 de d\u00e9gazage en ligne utilise une technologie avanc\u00e9e de fusion \u00e0 haute teneur en silicium afin de garantir une longue dur\u00e9e de vie. Le rotor de d\u00e9gazage, l'embout de protection du syst\u00e8me de chauffage et l'embout de protection du thermocouple sont fabriqu\u00e9s \u00e0 partir de c\u00e9ramique, ce qui permet de r\u00e9pondre aux exigences de la production d'aluminium de haute pr\u00e9cision.<\/p>\n<p>Le <a href=\"http:\/\/www.alalloycasting.com\/fr\/dual-rotor-online-degassing-unit\/\">unit\u00e9 de d\u00e9gazage en ligne<\/a>\u00a0doit \u00eatre install\u00e9e entre le four et l'\u00e9quipement de coul\u00e9e. Elle sert \u00e0 \u00e9liminer l'hydrog\u00e8ne (H) et les scories de l'aluminium fondu. L'unit\u00e9 de d\u00e9gazage en ligne remplit une double fonction : traitement et chauffage. Elle est destin\u00e9e \u00e0 l'industrie de la purification de haute pr\u00e9cision de l'aluminium fondu.<\/p>\n<p>Le d\u00e9gazeur d'aluminium liquide repose sur le principe selon lequel l'hydrog\u00e8ne gazeux dissous se d\u00e9place d'une zone de forte concentration (dans la masse fondue) vers une zone de faible concentration (dans le gaz inerte).<br \/>\nL'hydrog\u00e8ne gazeux se disperse dans le m\u00e9tal en fusion comme s'il \u00e9tait lib\u00e9r\u00e9 dans un espace confin\u00e9.<br \/>\nElle maintiendra une concentration constante tout au long de la fusion.<br \/>\nL'hydrog\u00e8ne gazeux peut se propager \u00e0 travers un m\u00e9tal liquide presque aussi rapidement que dans l'air.<\/p>\n<p>Sources d'hydrog\u00e8ne dans l'aluminium fondu :<br \/>\nhumidit\u00e9 atmosph\u00e9rique<br \/>\nmastic m\u00e9tallique humide<br \/>\nrev\u00eatement humide du four (creuset, poches de transfert)<br \/>\ninstruments de fonderie humide<br \/>\nruisseaux humides et autres consommables<br \/>\nproduits de combustion de combustibles de four contenant de l'hydrog\u00e8ne<\/p>\n<p>Il n'est donc pas n\u00e9cessaire que chaque once de m\u00e9tal soit en contact avec le gaz inerte. L'efficacit\u00e9 du d\u00e9gazage de l'aluminium d\u00e9pend de deux facteurs : la vitesse de transfert \u00e0 l'interface m\u00e9tal\/gaz et la surface totale disponible pour ce transfert.<\/p>","protected":false},"excerpt":{"rendered":"<p>In the rotary method of the aluminium liquid degasser, an inert or chemically inactive gas (Argon, Nitrogen) is purged through a rotary shaft and a&hellip;<\/p>","protected":false},"author":1,"featured_media":11460,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-11459","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>Aluminium Liquid Degasser -sales@alalloycasting.com<\/title>\n<meta name=\"description\" content=\"The aluminium liquid 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