{"id":10002,"date":"2021-08-20T06:44:05","date_gmt":"2021-08-20T06:44:05","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=10002"},"modified":"2021-08-20T06:44:05","modified_gmt":"2021-08-20T06:44:05","slug":"aluminum-foundry-refining-agent","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/aluminum-foundry-refining-agent\/","title":{"rendered":"Agent d'affinage pour fonderie d'aluminium"},"content":{"rendered":"<p>Un bon agent d'affinage destin\u00e9 \u00e0 la fonderie d'aluminium doit pr\u00e9senter une forte capacit\u00e9 d'adsorption et de dissolution des inclusions, un point de fusion bas et de bonnes performances de s\u00e9paration entre les scories et l'aluminium ; certains composants de l'agent d'affinage doivent \u00e9galement modifier les propri\u00e9t\u00e9s des gaz du four lorsqu'ils sont chauff\u00e9s et fondus, cr\u00e9ant ainsi une atmosph\u00e8re r\u00e9ductrice permettant de limiter l'oxydation de l'aluminium.<\/p>\n<p>Lors du choix d'un agent d'affinage pour la fonderie d'aluminium, outre la prise en compte des propri\u00e9t\u00e9s physiques de l'agent d'affinage (telles que le point de fusion, la viscosit\u00e9, la tension superficielle, la densit\u00e9, la volatilit\u00e9, etc.), il convient \u00e9galement de tenir compte des caract\u00e9ristiques de l'interaction chimique entre l'agent d'affinage et les m\u00e9taux ainsi que les milieux gazeux.<\/p>\n<p><strong>Avantages de l'agent d'affinage pour fonderie d'aluminium<\/strong><\/p>\n<p>Cela favorise l'\u00e9limination du film d'oxyde pr\u00e9sent \u00e0 l'interface entre l'aluminium fondu et l'agent d'affinage, ainsi que l'\u00e9limination des inclusions et des gaz.<br \/>\nIl r\u00e9agit facilement avec l'aluminium fondu, ce qui favorise la destruction du film d'oxyde, et l'hydrog\u00e8ne peut s'\u00e9chapper de la surface de l'aluminium fondu.<br \/>\nIl permet de dissoudre et d'adsorber les inclusions, ce qui facilite leur \u00e9limination ainsi que celle des gaz.<br \/>\nLorsque le <a href=\"http:\/\/www.alalloycasting.com\/fr\/refining-flux\/\">flux de raffinage<\/a> Joue principalement un r\u00f4le protecteur ; il convient alors de choisir un sel de chlorure inerte vis-\u00e0-vis de l'aluminium fondu. Lorsque la purification par d\u00e9gazage est l'objectif principal, il convient de choisir un agent d'affinage qui r\u00e9agisse efficacement avec l'aluminium fondu pour g\u00e9n\u00e9rer des substances gazeuses. Lorsque l'objectif principal est d'\u00e9liminer les inclusions, il convient de prendre pleinement en compte la capacit\u00e9 d'\u00e9vacuation des scories de l'agent d'affinage.<\/p>\n<p>Les sels de chlorure couramment utilis\u00e9s dans la production comprennent le chlorure de zinc, le chlorure de mangan\u00e8se, le chlorure de potassium, le chlorure de sodium, l'hexachloro\u00e9thane, le t\u00e9trachlorure de carbone, etc., qui peuvent \u00eatre utilis\u00e9s seuls ou en combinaison. Si l'agent d'affinage doit non seulement purifier, mais aussi modifier ou affiner les grains, un agent d'affinage composite, compos\u00e9 d'additifs de modification et d'agents d'affinage, peut \u00eatre utilis\u00e9 pour assurer un traitement complet de l'aluminium fondu. Lorsque l\u2019hexachloro\u00e9thane est utilis\u00e9 pour purifier la masse fondue d\u2019alliage d\u2019aluminium moul\u00e9, il est n\u00e9cessaire d\u2019ajouter des additifs appropri\u00e9s afin de retarder la r\u00e9action et d\u2019am\u00e9liorer l\u2019effet d\u2019affinage.<\/p>","protected":false},"excerpt":{"rendered":"<p>A good aluminum foundry refining agent should have a strong ability to adsorb and dissolve inclusions, a low melting point and good slag-aluminum separation performance,&hellip;<\/p>","protected":false},"author":1,"featured_media":10003,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[120],"tags":[12393,121,123],"class_list":["post-10002","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fluxes","tag-aluminum-foundry-refining-agent","tag-fluxes","tag-refining-flux"],"yoast_head":"<!-- This site is optimized with the Yoast SEO 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