{"id":6071,"date":"2020-10-25T05:36:45","date_gmt":"2020-10-25T05:36:45","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=6071"},"modified":"2020-10-26T03:12:35","modified_gmt":"2020-10-26T03:12:35","slug":"furnace-purification","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/furnace-purification\/","title":{"rendered":"Purification du four"},"content":{"rendered":"<p>\u00c0 l'heure actuelle, la m\u00e9thode largement utilis\u00e9e pour la purification en four, qui offre une bonne efficacit\u00e9 d'\u00e9limination des scories et des gaz, consiste \u00e0 faire passer le flux pulv\u00e9ris\u00e9, dont les principaux composants sont le NaCl, le KCl, le NaF, etc., \u00e0 travers un r\u00e9servoir de stockage sous pression, \u00e0 m\u00e9langer l'azote et le flux, puis \u00e0 les pulv\u00e9riser uniform\u00e9ment \u00e0 travers un tuyau m\u00e9tallique au-dessus du bain d'aluminium fondu. Dans la pratique, il est n\u00e9cessaire de contr\u00f4ler rigoureusement la quantit\u00e9 de poudre pulv\u00e9ris\u00e9e et la dur\u00e9e de pulv\u00e9risation, et de normaliser l\u2019op\u00e9ration afin que toutes les parties du bain de fusion puissent \u00eatre asperg\u00e9es de flux. Il est particuli\u00e8rement important de contr\u00f4ler la quantit\u00e9 de <a href=\"http:\/\/www.alalloycasting.com\/fr\/how-to-use-aluminum-flux\/\">flux d'aluminium<\/a> Ajout\u00e9 par tonne, g\u00e9n\u00e9ralement entre 2 et 3 kg\/t. Cette quantit\u00e9 est appropri\u00e9e ; si la dose est trop \u00e9lev\u00e9e, cela affectera la qualit\u00e9 de la masse fondue.<\/p>\n<h2>Purification du four<\/h2>\n<p>Il existe une certaine relation entre la solubilit\u00e9 CH de l'hydrog\u00e8ne dans l'aluminium fondu, la temp\u00e9rature de la masse fondue et la pression partielle d'hydrog\u00e8ne. La solubilit\u00e9 de l'hydrog\u00e8ne dans la masse fondue d\u00e9pend de la temp\u00e9rature de celle-ci et de la pression partielle de l'hydrog\u00e8ne : lorsque la temp\u00e9rature de la masse fondue est constante, plus la pression partielle de l'hydrog\u00e8ne est \u00e9lev\u00e9e, plus la solubilit\u00e9 de l'hydrog\u00e8ne est grande ; lorsque la pression partielle de l'hydrog\u00e8ne est constante, plus la temp\u00e9rature de la masse fondue est \u00e9lev\u00e9e, plus la solubilit\u00e9 de l'hydrog\u00e8ne est grande.<\/p>\n<p>La temp\u00e9rature de fusion et le temps de s\u00e9jour dans le bain de fusion ont une influence tr\u00e8s directe sur la teneur en hydrog\u00e8ne de la masse fondue d'alliage d'aluminium. C\u2019est pourquoi ces deux indicateurs cl\u00e9s du processus de fusion doivent \u00eatre strictement contr\u00f4l\u00e9s lors de la production. Plus le temps de s\u00e9jour th\u00e9orique \u00e0 haute temp\u00e9rature est court, mieux c\u2019est, et plus la temp\u00e9rature de fusion est basse, mieux c\u2019est ; toutefois, en raison des conditions et des performances des \u00e9quipements, il n\u2019est pas possible de r\u00e9pondre aux exigences id\u00e9ales. Dans la production r\u00e9elle de flans de feuille d\u2019aluminium, la temp\u00e9rature de fusion doit \u00eatre maintenue en dessous de 750 \u00b0C, la dur\u00e9e de fusion d\u2019une cuv\u00e9e doit \u00eatre limit\u00e9e \u00e0 4,5 h, et le temps de s\u00e9jour interm\u00e9diaire entre la fin de la fusion et l\u2019arriv\u00e9e dans le convertisseur doit \u00eatre inf\u00e9rieur \u00e0 4 h. Parmi ces dur\u00e9es, celle-ci doit \u00eatre maintenue aussi courte que possible dans la mesure du possible. Si le temps de s\u00e9jour apr\u00e8s la fusion d\u00e9passe 4 h, l\u2019affinage doit \u00eatre effectu\u00e9 \u00e0 nouveau.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6074\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/10\/Furnace-Purification.jpg\" alt=\"Purification du four\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/10\/Furnace-Purification.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/10\/Furnace-Purification-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p>La temp\u00e9rature du four de maintien doit \u00eatre maintenue aussi basse que possible pendant le processus de production afin de r\u00e9duire l'absorption d'hydrog\u00e8ne par la masse fondue. En r\u00e8gle g\u00e9n\u00e9rale, la temp\u00e9rature du four de maintien ne doit pas d\u00e9passer 735 \u00b0C lors de la fabrication de feuilles d'aluminium de haute qualit\u00e9. Si l'on fabrique un produit aux sp\u00e9cifications \u00e9troites, la baisse de temp\u00e9rature du syst\u00e8me est relativement faible en raison du faible d\u00e9bit ; par cons\u00e9quent, des mesures de conservation de la chaleur doivent \u00eatre prises pour le syst\u00e8me de goulotte, et la temp\u00e9rature de l'aluminium fondu dans l'\u00e9quipement de d\u00e9gazage doit \u00eatre augment\u00e9e de mani\u00e8re appropri\u00e9e afin de garantir que la temp\u00e9rature du four de maintien soit maintenue \u00e0 un niveau aussi bas que possible.<\/p>\n<p>Le proc\u00e9d\u00e9 de convertisseur est un processus au cours duquel les inclusions d'oxydation de la coul\u00e9e et la teneur en hydrog\u00e8ne augmentent. Les diff\u00e9rentes m\u00e9thodes d'exploitation du convertisseur ont des effets vari\u00e9s sur la qualit\u00e9 finale de la coul\u00e9e. Il est donc indispensable de choisir la meilleure m\u00e9thode de convertisseur afin d'\u00e9viter les effets n\u00e9fastes li\u00e9s \u00e0 son fonctionnement. Les m\u00e9thodes actuelles de convertisseur comprennent principalement le convertisseur \u00e0 poche et le convertisseur \u00e0 poche. Les statistiques montrent que la teneur en alumine du convertisseur \u00e0 poche a augment\u00e9 de 52%, tandis que celle du convertisseur \u00e0 goulotte a augment\u00e9 de 8,7%. On constate ainsi que la m\u00e9thode du convertisseur \u00e0 goulotte est plus efficace pour contr\u00f4ler la qualit\u00e9 de la masse fondue.<\/p>","protected":false},"excerpt":{"rendered":"<p>At present, the widely used method of furnace purification with good slag and gas removal effect is to pass the powder sprayed flux whose main&hellip;<\/p>","protected":false},"author":1,"featured_media":6074,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[4848,4862,4858,4856,4859,4860,4857,4861,4849,4871,4864,4868,4863,4869,4870,4866,4867,4865,4846,4851,4850,4872,4873,4847,4853,4854,4855,4852],"class_list":["post-6071","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-furnace-purification-in-dubai-aluminium","tag-furnace-purification-in-dubai-aluminium-career","tag-furnace-purification-in-dubai-aluminium-co-ltd-v-salaam","tag-furnace-purification-in-dubai-aluminium-company-limited","tag-furnace-purification-in-dubai-aluminium-company-ltd","tag-furnace-purification-in-dubai-aluminium-factory","tag-furnace-purification-in-dubai-aluminium-pjsc","tag-furnace-purification-in-dubai-aluminium-scrap-prices","tag-furnace-purification-in-dubai-aluminum","tag-furnace-purification-in-dubai-aluminum-agency-in-the-philippines","tag-furnace-purification-in-dubai-aluminum-careers","tag-furnace-purification-in-dubai-aluminum-co","tag-furnace-purification-in-dubai-aluminum-company","tag-furnace-purification-in-dubai-aluminum-company-contact-number","tag-furnace-purification-in-dubai-aluminum-company-vacancies","tag-furnace-purification-in-dubai-aluminum-job-vacancies","tag-furnace-purification-in-dubai-aluminum-pjsc","tag-furnace-purification-in-dubai-aluminum-v-salaam","tag-furnace-purification-in-dubal","tag-furnace-purification-in-dubal-aluminium","tag-furnace-purification-in-dubal-aluminum","tag-furnace-purification-in-dubal-aluminum-careers","tag-furnace-purification-in-dubal-aluminum-jobs","tag-furnace-purification-in-dubal-america","tag-furnace-purification-in-dubal-dubai-aluminium","tag-furnace-purification-in-dubal-dubai-aluminium-company","tag-furnace-purification-in-dubal-dubai-aluminum","tag-furnace-purification-in-dubal-dubai-aluminum-careers"],"yoast_head":"<!-- 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