{"id":2584,"date":"2020-07-04T09:46:40","date_gmt":"2020-07-04T09:46:40","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=2584"},"modified":"2020-09-28T08:04:59","modified_gmt":"2020-09-28T08:04:59","slug":"molten-metal-filters-for-metallurgical-industry","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/molten-metal-filters-for-metallurgical-industry\/","title":{"rendered":"Filtres pour m\u00e9taux en fusion destin\u00e9s \u00e0 l'industrie m\u00e9tallurgique"},"content":{"rendered":"

La c\u00e9ramique alv\u00e9olaire est un type de mat\u00e9riau poreux. Il s'agit d'un produit c\u00e9ramique poreux de troisi\u00e8me g\u00e9n\u00e9ration, d\u00e9velopp\u00e9 apr\u00e8s les c\u00e9ramiques poreuses classiques de premi\u00e8re g\u00e9n\u00e9ration et les c\u00e9ramiques poreuses en nid d'abeille de deuxi\u00e8me g\u00e9n\u00e9ration. La taille de ses pores varie du nanom\u00e8tre au microm\u00e8tre ; il pr\u00e9sente une structure r\u00e9ticulaire tridimensionnelle et une porosit\u00e9 \u00e9lev\u00e9e, pouvant atteindre 90%. Les filtres pour m\u00e9taux en fusion destin\u00e9s \u00e0 l\u2019industrie m\u00e9tallurgique pr\u00e9sentent les avantages suivants : l\u00e9g\u00e8ret\u00e9, porosit\u00e9 \u00e9lev\u00e9e, grande surface sp\u00e9cifique, r\u00e9sistance aux chocs thermiques, r\u00e9sistance \u00e0 la corrosion, r\u00e9sistance aux hautes temp\u00e9ratures, longue dur\u00e9e de vie et bonne capacit\u00e9 d\u2019adsorption.<\/p>\n

Le d\u00e9veloppement de la troisi\u00e8me g\u00e9n\u00e9ration de mat\u00e9riaux c\u00e9ramiques alv\u00e9olaires a d\u00e9but\u00e9 dans les ann\u00e9es 1970. En tant que nouveau type de mat\u00e9riau filtrant inorganique non m\u00e9tallique, il utilise principalement de la poudre de minerai brut, du kaolin ou des r\u00e9sidus de l'industrie c\u00e9ramique, des cendres volantes, de la gangue de charbon et des r\u00e9sidus de marbre. Ces mati\u00e8res premi\u00e8res, ainsi que des scories et d\u2019autres mat\u00e9riaux inorganiques, sont m\u00e9lang\u00e9es \u00e0 une certaine proportion d\u2019agent moussant, de co-solvant, etc., afin de former une boue c\u00e9ramique \u00e0 base d\u2019eau, qui est ensuite immerg\u00e9e dans de la mousse plastique pour former un rev\u00eatement c\u00e9ramique, puis cuite. En fonction du m\u00e9tal liquide \u00e0 filtrer, les mat\u00e9riaux couramment utilis\u00e9s sont le carbure de silicium, l\u2019alumine, la zircone, la magn\u00e9sie, etc.<\/p>\n

\u00c0 l'heure actuelle, les c\u00e9ramiques alv\u00e9olaires sont largement utilis\u00e9es dans de nombreux domaines. Outre la purification des m\u00e9taux en fusion dans l'industrie m\u00e9tallurgique, elles sont \u00e9galement utilis\u00e9es dans les mat\u00e9riaux d'isolation thermique, comme supports de catalyseurs chimiques et dans d'autres domaines d'application.<\/p>\n

\"Filtres<\/p>\n

Filtres pour m\u00e9taux en fusion destin\u00e9s \u00e0 l'industrie m\u00e9tallurgique<\/h2>\n

Le filtre en c\u00e9ramique alv\u00e9ol\u00e9e<\/a>\u00a0Il est principalement utilis\u00e9 dans le processus de coul\u00e9e pour purifier l'alliage de coul\u00e9e liquide et r\u00e9duire, voire \u00e9liminer, diverses inclusions non m\u00e9talliques ainsi que les probl\u00e8mes d'\u00e9chappement survenant lors de la coul\u00e9e. En raison de d\u00e9fauts li\u00e9s \u00e0 la coul\u00e9e, tels que les inclusions non m\u00e9talliques, la proportion de rebuts de coul\u00e9e par rapport au nombre total de rebuts atteint 50%-60%. Alors que divers co\u00fbts augmentent, on peut s\u2019attendre \u00e0 ce que le rejet de ces d\u00e9chets exc\u00e9dentaires nuise \u00e0 l\u2019environnement ext\u00e9rieur ; de plus, les d\u00e9fauts d\u2019inclusion non seulement r\u00e9duisent consid\u00e9rablement les propri\u00e9t\u00e9s m\u00e9caniques et les performances de la pi\u00e8ce moul\u00e9e, mais ont \u00e9galement un effet n\u00e9faste sur l\u2019usinage et l\u2019aspect de celle-ci.<\/p>\n

Pour r\u00e9soudre ce probl\u00e8me, on a d\u2019abord utilis\u00e9 des treillis m\u00e9talliques, des plaques d\u2019acier perfor\u00e9es, etc., afin de fabriquer des filtres simples ins\u00e9r\u00e9s dans le syst\u00e8me de coul\u00e9e pour \u00e9liminer les inclusions ; puis on est pass\u00e9 \u00e0 des structures bidimensionnelles telles que les fibres de silicate en forme d\u2019\u00e9pingles et les fibres de nitrure de bore. Aujourd\u2019hui, les filtres en c\u00e9ramique alv\u00e9olaire utilisent la taille de leurs pores pour intercepter m\u00e9caniquement les grosses particules d\u2019oxydes mixtes et le g\u00e2teau de filtration pour retenir les petites particules d\u2019oxydes mixtes. Gr\u00e2ce \u00e0 leurs capacit\u00e9s d\u2019adsorption et de rectification, la gamme de filtres en c\u00e9ramique alv\u00e9olaire a consid\u00e9rablement am\u00e9lior\u00e9 le rendement des pi\u00e8ces moul\u00e9es. Par exemple, apr\u00e8s la mise en place du filtre en c\u00e9ramique alv\u00e9olaire \u00e0 l\u2019usine de fonderie n\u00b0 2 de Dongfeng, le taux de production est pass\u00e9 de 65,31 TP3T \u00e0 71,51 TP3T, et 61 TP3T de fonte ont \u00e9t\u00e9 \u00e9conomis\u00e9s rien que sur le poids des masselottes. La duret\u00e9 des pi\u00e8ces moul\u00e9es filtr\u00e9es s\u2019est \u00e9galement consid\u00e9rablement am\u00e9lior\u00e9e, ce qui prolonge la dur\u00e9e de vie des outils de coupe.<\/p>\n

Les filtres en c\u00e9ramique expans\u00e9e utilisent g\u00e9n\u00e9ralement de la mousse de polyur\u00e9thane comme support, immerg\u00e9e dans une boue c\u00e9ramique compos\u00e9e d\u2019agr\u00e9gats r\u00e9fractaires, d\u2019agents de frittage, de liants, d\u2019autres poudres fines et d\u2019eau ; l\u2019exc\u00e8s de p\u00e2te est ensuite essor\u00e9, laissant la couche de mat\u00e9riau c\u00e9ramique enrobant les fibres de mousse. Ce mat\u00e9riau est ensuite s\u00e9ch\u00e9, cuit et fritt\u00e9 \u00e0 haute temp\u00e9rature, ce qui donne finalement un produit c\u00e9ramique de type mousse. En raison des diff\u00e9rentes temp\u00e9ratures de coul\u00e9e des alliages, il convient de choisir des filtres en c\u00e9ramique expans\u00e9e contenant des mat\u00e9riaux r\u00e9fractaires pour les pi\u00e8ces moul\u00e9es. Au cours des derni\u00e8res d\u00e9cennies, des filtres en c\u00e9ramique expans\u00e9e compos\u00e9s de divers mat\u00e9riaux ont \u00e9t\u00e9 d\u00e9velopp\u00e9s, en fonction des performances des alliages de diff\u00e9rents mat\u00e9riaux, tant en France qu\u2019\u00e0 l\u2019\u00e9tranger.<\/p>","protected":false},"excerpt":{"rendered":"

Foam ceramic is a kind of porous material. It is a third-generation porous ceramic product developed after the first-generation common porous ceramics and the second-generation…<\/p>","protected":false},"author":1,"featured_media":5286,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[138],"tags":[434,433,105,432,431,430,429,428,21,427,426,219,425,424,423,422,421,420,165,419,418,417,416,415,414,413,412,483,411,298,410,409,408,407,406,405],"class_list":["post-2584","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-seo","tag-30-ppi-foam","tag-alumina-ceramic-foam-filter","tag-ceramic-filter-for-foundry","tag-ceramic-filter-foundry","tag-ceramic-filter-manufacturer","tag-ceramic-filter-media","tag-ceramic-filtration","tag-ceramic-foam","tag-ceramic-foam-filter","tag-ceramic-foam-filter-manufacturers","tag-ceramic-foam-filter-manufacturing-process","tag-ceramic-foam-filter-suppliers","tag-ceramic-foam-filters-for-casting","tag-ceramic-honeycomb","tag-ceramic-honeycomb-filter","tag-filter-foam-manufacturers","tag-filter-manufacturers-in-india","tag-foam-filter","tag-foam-filter-manufacturers","tag-foam-filter-material","tag-foundry-ceramic-filters","tag-foundry-filters","tag-honeycomb-ceramic-filter","tag-honeycomb-filter","tag-honeycomb-filter-material","tag-metal-filter","tag-metal-foam-filter","tag-molten-metal-filter","tag-porous-alumina-plate","tag-porous-ceramic-filter","tag-porous-ceramic-materials","tag-porous-ceramic-plate","tag-ppi-foam","tag-refractory-materials","tag-silicon-carbide-ceramic-foam-filter","tag-silicon-carbide-foam-filter"],"yoast_head":"\nMolten Metal Filters used for Metallurgical Industry<\/title>\n<meta name=\"description\" content=\"Molten Metal Filters have the advantages of light weight, high porosity, large specific surface area, thermal shock resistance.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.alalloycasting.com\/fr\/molten-metal-filters-for-metallurgical-industry\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Molten Metal Filters used for Metallurgical Industry\" \/>\n<meta property=\"og:description\" content=\"Molten Metal Filters have the advantages of light weight, high porosity, large specific surface area, thermal shock resistance.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.alalloycasting.com\/fr\/molten-metal-filters-for-metallurgical-industry\/\" \/>\n<meta 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