{"id":6070,"date":"2020-10-25T05:33:14","date_gmt":"2020-10-25T05:33:14","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=6070"},"modified":"2020-10-26T03:13:22","modified_gmt":"2020-10-26T03:13:22","slug":"online-degassing-of-molten-aluminum","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/online-degassing-of-molten-aluminum\/","title":{"rendered":"D\u00e9gazage en ligne de l'aluminium fondu"},"content":{"rendered":"<p>\u00c0 l'heure actuelle, le d\u00e9gazage en ligne de l'aluminium fondu est de plus en plus utilis\u00e9 pour la purification de l'aluminium fondu. L'\u00e9quipement de d\u00e9gazage en ligne produit par AdTech est install\u00e9 entre le four et la machine de coul\u00e9e afin d'\u00e9liminer l'hydrog\u00e8ne et les autres r\u00e9sidus contenus dans l'aluminium fondu et ses alliages, qui nuisent \u00e0 sa qualit\u00e9 et \u00e0 ses propri\u00e9t\u00e9s m\u00e9caniques. L'efficacit\u00e9 du d\u00e9gazage est stable, avec une moyenne de 60%.<\/p>\n<h2>D\u00e9gazage en ligne de l'aluminium fondu<\/h2>\n<p>Pour r\u00e9aliser le <a href=\"http:\/\/www.alalloycasting.com\/fr\/online-degassing-system\/\">d\u00e9gazage en ligne<\/a> Pour travailler l'aluminium fondu de mani\u00e8re stable et efficace, il convient de pr\u00eater attention aux points suivants :<\/p>\n<p>L'unit\u00e9 de d\u00e9gazage doit pr\u00e9senter une bonne \u00e9tanch\u00e9it\u00e9 \u00e0 l'air, \u00eatre moins sensible aux conditions climatiques, produire moins de scories et ne pas g\u00e9n\u00e9rer de pollution secondaire. Lorsque la cuve de d\u00e9gazage est mal \u00e9tanch\u00e9ifi\u00e9e, la vapeur d'eau pr\u00e9sente dans l'air p\u00e9n\u00e8tre facilement dans le four, entra\u00eenant une absorption d'hydrog\u00e8ne. Les premi\u00e8res unit\u00e9s de d\u00e9gazage utilisaient principalement de l\u2019azote de haute puret\u00e9 comme gaz de couverture pour r\u00e9duire l\u2019absorption d\u2019hydrog\u00e8ne, mais celui-ci subissait \u00e9galement, dans une certaine mesure, l\u2019influence des conditions m\u00e9t\u00e9orologiques. Par cons\u00e9quent, afin d\u2019am\u00e9liorer l\u2019efficacit\u00e9 du d\u00e9gazage et de r\u00e9duire l\u2019influence des conditions climatiques, l\u2019\u00e9quipement de d\u00e9gazage doit pr\u00e9senter une bonne \u00e9tanch\u00e9it\u00e9.<\/p>\n<p>Les bulles pr\u00e9sentes dans la chambre de d\u00e9gazage doivent \u00eatre finement dispers\u00e9es et uniformes, et le niveau du liquide ne doit pas subir de fortes fluctuations. Lorsque le d\u00e9bit total et la pression du gaz de proc\u00e9d\u00e9 dans la machine de d\u00e9gazage restent inchang\u00e9s, plus le nombre de bulles est \u00e9lev\u00e9, plus la surface de contact entre le gaz de proc\u00e9d\u00e9 et la masse fondue est importante. Par cons\u00e9quent, plus les bulles sont petites (ce qui \u00e9quivaut \u00e0 un plus grand nombre de bulles) et plus leur dispersion est importante, plus la surface de contact est grande, ce qui favorise davantage la diffusion de l\u2019hydrog\u00e8ne dans le gaz de proc\u00e9d\u00e9 et permet ainsi d\u2019atteindre l\u2019objectif d\u2019\u00e9limination de l\u2019hydrog\u00e8ne. Le rotor doit disposer d\u2019une puissance d\u2019agitation suffisante pour que les bulles aient une vitesse de d\u00e9placement suffisante afin de disperser l\u2019ensemble du bain de fusion ; toutefois, une vitesse de rotation trop \u00e9lev\u00e9e du rotor provoquera un roulement de la surface du liquide et risque de faire r\u00e9int\u00e9grer les scories dans le bain de fusion.<\/p>\n<p>La structure du rotor de l'unit\u00e9 de d\u00e9gazage doit offrir une puissance d'agitation suffisante. L'arbre et la roue du rotor doivent pr\u00e9senter une conception ad\u00e9quate ; il convient d'augmenter de mani\u00e8re appropri\u00e9e le diam\u00e8tre de la roue et de l'associer \u00e0 une vitesse adapt\u00e9e afin d'accro\u00eetre la force d'agitation du rotor.<\/p>\n<p>Le gaz de proc\u00e9d\u00e9 doit pr\u00e9senter une grande puret\u00e9 ; il ne doit pas former de scories ni absorber d\u2019hydrog\u00e8ne provenant de la masse fondue. En r\u00e8gle g\u00e9n\u00e9rale, le contr\u00f4le de la puret\u00e9 du gaz de proc\u00e9d\u00e9 s\u2019articule autour de deux axes : d\u2019une part, le contr\u00f4le de la source de gaz, et d\u2019autre part, le contr\u00f4le des fuites au niveau de l\u2019ensemble des conduites et des instruments par lesquels le gaz circule. En r\u00e8gle g\u00e9n\u00e9rale, la puret\u00e9 de la source de gaz de proc\u00e9d\u00e9 doit atteindre 99,9991 TP3T, la teneur en eau doit \u00eatre inf\u00e9rieure \u00e0 4 \u00d7 10\u207b\u2076 et la teneur en oxyg\u00e8ne inf\u00e9rieure \u00e0 5 \u00d7 10\u207b\u2076. Une teneur excessive en eau et en oxyg\u00e8ne dans le gaz de proc\u00e9d\u00e9 entra\u00eenera la formation de scories et l'absorption d'hydrog\u00e8ne.<\/p>\n<p>Afin de garantir que le bain de fusion dispose d'un temps de s\u00e9jour suffisant dans le dispositif de d\u00e9gazage, un certain volume du bain de fusion est n\u00e9cessaire. Le rotor de l'unit\u00e9 de d\u00e9gazage doit \u00eatre immerg\u00e9 \u00e0 une certaine profondeur dans le bain de fusion. La profondeur d'immersion du rotor influe directement sur la capacit\u00e9 du gaz de traitement \u00e0 recouvrir enti\u00e8rement le bain de fusion, ce qui a un impact plus marqu\u00e9 sur l'efficacit\u00e9 du d\u00e9gazage. En r\u00e8gle g\u00e9n\u00e9rale, la profondeur d\u2019immersion du rotor et de la turbine doit \u00eatre sup\u00e9rieure \u00e0 500 mm, et la distance entre la turbine et le fond du bain de fusion doit \u00eatre comprise entre 50 et 100 mm.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6072\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/10\/Online-Degassing-of-Molten-Aluminum.jpg\" alt=\"D\u00e9gazage en ligne de l&#039;aluminium fondu\" width=\"400\" height=\"500\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/10\/Online-Degassing-of-Molten-Aluminum.jpg 400w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/10\/Online-Degassing-of-Molten-Aluminum-240x300.jpg 240w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/p>\n<p>Le <a href=\"http:\/\/www.alalloycasting.com\/fr\/degassing-unit\/\">unit\u00e9 de d\u00e9gazage<\/a> Il doit pr\u00e9senter de bonnes performances d'isolation et une temp\u00e9rature de paroi du four faible. En g\u00e9n\u00e9ral, la capacit\u00e9 install\u00e9e du four dans l'unit\u00e9 de d\u00e9gazage est d'environ 550 \u00e0 650 kg.<br \/>\nSur la base d'un d\u00e9bit horaire de 2 t, le temps de s\u00e9jour de l'aluminium fondu dans le four est d'environ 15 minutes. Si les performances de conservation de la chaleur du syst\u00e8me de d\u00e9gazage sont insuffisantes, il est n\u00e9cessaire d'augmenter la puissance de chauffage de l'\u00e9quipement de d\u00e9gazage ou d'\u00e9lever la temp\u00e9rature du four de maintien afin de garantir la temp\u00e9rature de la chambre avant. L'augmentation de la temp\u00e9rature accro\u00eet consid\u00e9rablement la solubilit\u00e9 de l'hydrog\u00e8ne et la capacit\u00e9 d'absorption d'hydrog\u00e8ne du bain fondu. Par cons\u00e9quent, ces deux mesures entra\u00eenent une augmentation de la teneur en hydrog\u00e8ne du bain fondu. C'est pourquoi l'unit\u00e9 de d\u00e9gazage doit pr\u00e9senter de bonnes performances d'isolation, et la temp\u00e9rature de l'enveloppe du four est g\u00e9n\u00e9ralement inf\u00e9rieure \u00e0 75 \u00b0C.<\/p>\n<p>Le rev\u00eatement du four et l'aluminium doivent \u00eatre secs et faciles \u00e0 nettoyer. Le rev\u00eatement de l'unit\u00e9 de d\u00e9gazage n\u00e9cessite g\u00e9n\u00e9ralement des mat\u00e9riaux r\u00e9fractaires qui ne sont pas impr\u00e9gn\u00e9s d'aluminium, qui pr\u00e9sentent des performances stables, qui n'introduisent pas de gaz dans la masse fondue, qui r\u00e9sistent au frittage \u00e0 haute temp\u00e9rature et sur lesquels les scories ne s'accumulent pas facilement.<\/p>\n<p>Les mesures ci-dessus garantissent le fonctionnement stable de l'\u00e9quipement de d\u00e9gazage. Dans des conditions normales, le rendement de d\u00e9gazage devrait d\u00e9passer 50%. Veillez \u00e0 effectuer quotidiennement les mesures et les v\u00e9rifications n\u00e9cessaires, et contr\u00f4lez l'\u00e9quipement ; en cas d'anomalie, prenez les mesures qui s'imposent.<\/p>","protected":false},"excerpt":{"rendered":"<p>At present, the online degassing of molten aluminum is more widely used for molten aluminum purification. The on-line degassing equipment produced by AdTech is installed&hellip;<\/p>","protected":false},"author":1,"featured_media":6072,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[4888,4896,4909,4891,4910,4890,4889,4898,4915,4914,4913,4912,4905,4893,4907,4899,4901,4902,4881,4883,4880,4892,4900,4882,4874,4876,4875,4879,4878,4877,4884,4885,4887,4906,4908,4904,4903,4897,4894,4886,4911,4895],"class_list":["post-6070","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-online-degassing-of-molten-aluminum-in-career-opportunities-dubal","tag-online-degassing-of-molten-aluminum-in-deepak-dubal","tag-online-degassing-of-molten-aluminum-in-dubai-aluminium-dubal-careers","tag-online-degassing-of-molten-aluminum-in-dubai-aluminium-dubal-careers-jobs","tag-online-degassing-of-molten-aluminum-in-dubai-aluminium-co-ltd-dubal","tag-online-degassing-of-molten-aluminum-in-dubai-aluminium-company","tag-online-degassing-of-molten-aluminum-in-dubai-aluminium-company-limited","tag-online-degassing-of-molten-aluminum-in-dubai-aluminium-company-ltd-v-salaam-and-others","tag-online-degassing-of-molten-aluminum-in-dubai-aluminum-co-ltd-v-salaam","tag-online-degassing-of-molten-aluminum-in-dubai-aluminum-company-dubal","tag-online-degassing-of-molten-aluminum-in-dubai-aluminum-company-limited-dubal","tag-online-degassing-of-molten-aluminum-in-dubai-aluminum-company-ltd-dubal","tag-online-degassing-of-molten-aluminum-in-dubal-dubai-aluminium-company-limited","tag-online-degassing-of-molten-aluminum-in-dubal-local-business","tag-online-degassing-of-molten-aluminum-in-dubal-dubai-aluminium-co","tag-online-degassing-of-molten-aluminum-in-dubal-aluminium-career","tag-online-degassing-of-molten-aluminum-in-dubal-aluminium-company-dubai","tag-online-degassing-of-molten-aluminum-in-dubal-aluminium-driver-jobs","tag-online-degassing-of-molten-aluminum-in-dubal-aluminium-dubai","tag-online-degassing-of-molten-aluminum-in-dubal-aluminium-jebel-ali","tag-online-degassing-of-molten-aluminum-in-dubal-aluminium-jobs","tag-online-degassing-of-molten-aluminum-in-dubal-aluminium-jobs-in-dubai","tag-online-degassing-of-molten-aluminum-in-dubal-aluminium-suggestion-scheme","tag-online-degassing-of-molten-aluminum-in-dubal-aluminium-website","tag-online-degassing-of-molten-aluminum-in-dubal-aluminum-agency","tag-online-degassing-of-molten-aluminum-in-dubal-aluminum-company-ltd","tag-online-degassing-of-molten-aluminum-in-dubal-aluminum-job-vacancies","tag-online-degassing-of-molten-aluminum-in-dubal-aluminum-map","tag-online-degassing-of-molten-aluminum-in-dubal-aluminum-smelter","tag-online-degassing-of-molten-aluminum-in-dubal-aluminum-uae","tag-online-degassing-of-molten-aluminum-in-dubal-america-inc","tag-online-degassing-of-molten-aluminum-in-dubal-america-st-louis-mo","tag-online-degassing-of-molten-aluminum-in-dubal-california","tag-online-degassing-of-molten-aluminum-in-dubal-dubai-aluminium","tag-online-degassing-of-molten-aluminum-in-dubal-dubai-aluminium-company","tag-online-degassing-of-molten-aluminum-in-dubal-dubai-aluminium-company-ltd","tag-online-degassing-of-molten-aluminum-in-dubal-dubai-aluminium-company-uae","tag-online-degassing-of-molten-aluminum-in-dubal-lab","tag-online-degassing-of-molten-aluminum-in-dubal-reviews","tag-online-degassing-of-molten-aluminum-in-dubal-salary","tag-online-degassing-of-molten-aluminum-in-jobs-in-dubal-dubai-aluminium","tag-online-degassing-of-molten-aluminum-in-working-at-dubal"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Online Degassing of Molten Aluminum | Degassing Unit<\/title>\n<meta name=\"description\" content=\"Online degassing of molten aluminum is more widely used for molten aluminum purification. 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