{"id":6889,"date":"2020-12-08T06:51:35","date_gmt":"2020-12-08T06:51:35","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=6889"},"modified":"2020-12-08T06:52:29","modified_gmt":"2020-12-08T06:52:29","slug":"porous-ceramic-filtration","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/porous-ceramic-filtration\/","title":{"rendered":"Filtration par c\u00e9ramique poreuse"},"content":{"rendered":"<p>La fabrication de lingots et de billettes d'aluminium destin\u00e9s \u00e0 la fabrication de produits en aluminium de haute qualit\u00e9 exige que l'aluminium fondu soit relativement exempt d'inclusions, telles que des impuret\u00e9s solides insolubles ou des impuret\u00e9s en solution non miscibles. Cela permet de garantir que ces lingots ou \u00e9bauches puissent r\u00e9pondre aux exigences strictes de ces produits de haute qualit\u00e9 apr\u00e8s leur transformation en aval, tels que les mat\u00e9riaux d\u2019emballage ou les produits a\u00e9rospatiaux. Au cours du processus de production de l\u2019aluminium fondu, des impuret\u00e9s insolubles ou des inclusions se forment tout au long des \u00e9tapes de r\u00e9duction, de maintien, d\u2019alliage et de coul\u00e9e. Il est souhaitable d\u2019\u00e9liminer ces inclusions par filtration lors de l\u2019\u00e9tape finale, avant que l\u2019aluminium fondu ne se solidifie en lingot ou en billette. Au fil des ans, l\u2019industrie a eu recours \u00e0 diverses m\u00e9thodes pour r\u00e9pondre \u00e0 cette exigence, telles que la filtration sur lit filtrant et la filtration \u00e0 l\u2019aide de filtres c\u00e9ramiques poreux.<\/p>\n<p>Au d\u00e9but des ann\u00e9es 1970, un mat\u00e9riau \u00e0 pores ouverts <a href=\"http:\/\/www.alalloycasting.com\/fr\/porous-ceramic-filter\/\">filtre en c\u00e9ramique poreuse<\/a> La technique de filtration utilis\u00e9e dans les moules en aluminium a \u00e9t\u00e9 mise au point, et cette technologie a \u00e9t\u00e9 appliqu\u00e9e pour la premi\u00e8re fois \u00e0 des fins commerciales en 1974 pour la production de plaques et de lingots lamin\u00e9s destin\u00e9s \u00e0 la fabrication de t\u00f4les. Des m\u00e9dias filtrants en c\u00e9ramique poreuse sont utilis\u00e9s soit pour une coul\u00e9e unique, soit comme m\u00e9dias filtrants int\u00e9gr\u00e9s rempla\u00e7ables.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6891\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/12\/Porous-Ceramic-Filtration-2.jpg\" alt=\"Filtration par c\u00e9ramique poreuse\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/12\/Porous-Ceramic-Filtration-2.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/12\/Porous-Ceramic-Filtration-2-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p>La taille des pores du m\u00e9dia filtrant en mousse c\u00e9ramique est comprise entre 4 et 28 pores\/cm (10 \u00e0 70 pores\/pouce lin\u00e9aire), ce qui correspond \u00e0 des pores d'un diam\u00e8tre d'environ 0,036 cm \u00e0 0,26 cm. Les m\u00e9dias filtrants en c\u00e9ramique poreuse sont g\u00e9n\u00e9ralement fabriqu\u00e9s sous forme de carr\u00e9s dont les dimensions varient de 22,86 cm \u00d7 22,86 cm \u00d7 5,08 cm (9 pouces \u00d7 9 pouces \u00d7 2 pouces) \u00e0 66,04 cm \u00d7 66,04 cm \u00d7 5,08 cm (26 pouces \u00d7 26 pouces \u00d7 2 pouces). Fixez la doublure en papier fibreux sur le bord inclin\u00e9 afin d\u2019exercer une pression lat\u00e9rale, ce qui permet de maintenir le m\u00e9dia filtrant dans la bonne position \u00e0 l\u2019int\u00e9rieur du caisson de filtration et d\u2019emp\u00eacher les particules m\u00e9talliques de contourner le bord du m\u00e9dia filtrant. L\u2019\u00e9paisseur du mat\u00e9riau de support fibreux est g\u00e9n\u00e9ralement comprise entre environ 0,317 cm et 0,476 cm (1\/8 pouce et 3\/16 pouce) et il est g\u00e9n\u00e9ralement compos\u00e9 de fibres de silicate. Pour l\u2019aluminium fondu, la dur\u00e9e d\u2019utilisation typique du m\u00e9dia filtrant est comprise entre 30 minutes et 120 minutes.<\/p>\n<p>Dans les ann\u00e9es 1980, la technologie de filtration par c\u00e9ramique poreuse a \u00e9t\u00e9 rapidement et largement adopt\u00e9e sur le march\u00e9, permettant ainsi la fabrication \u00e0 grande \u00e9chelle de produits en aluminium de haute qualit\u00e9, notamment des mat\u00e9riaux d\u2019emballage, des plaques d\u2019impression lithographique et des produits a\u00e9rospatiaux (t\u00f4les). Mat\u00e9riaux, plaques, pi\u00e8ces forg\u00e9es, produits extrud\u00e9s, garnitures brillantes, tubes de condenseurs, feuilles, produits extrud\u00e9s pour la construction, alliages moul\u00e9s, ainsi que c\u00e2bles et fils conducteurs.<\/p>","protected":false},"excerpt":{"rendered":"<p>The requirement for the production of aluminum ingots and billets for the preparation of high-quality aluminum products is that molten aluminum is relatively free of&hellip;<\/p>","protected":false},"author":1,"featured_media":6890,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[1738,1778,4128,1733,1744,1455,1774,1745,1451,105,432,1757,1753,21,1743,427,219,1740,425,1732,1741,1742,1456,165,419,1737,1736,1739,1452,1780,1746,1716],"class_list":["post-6889","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-10-ppi-foam-filter","tag-alumina-ceramic-foam-filters","tag-alumina-foam-ceramic-filters","tag-aluminum-casting-filters","tag-asian-foundry-filter","tag-asian-foundry-filters","tag-cast-filters","tag-casting-filters-for-molten-aluminum","tag-ceramic-disc-filter","tag-ceramic-filter-for-foundry","tag-ceramic-filter-foundry","tag-ceramic-filters","tag-ceramic-filters-for-foundry","tag-ceramic-foam-filter","tag-ceramic-foam-filter-canada","tag-ceramic-foam-filter-manufacturers","tag-ceramic-foam-filter-suppliers","tag-ceramic-foam-filter-with-fiber","tag-ceramic-foam-filters-for-casting","tag-ceramic-foam-filters-for-foundry","tag-ceramic-foam-filters-producers","tag-ceramic-foam-filters-sizing","tag-ceramic-foundry-filter","tag-foam-filter-manufacturers","tag-foam-filter-material","tag-foundry-ceramic-foam-filter","tag-lanik-foam-ceramic-filter","tag-molten-metal-ceramic-foam-filter","tag-molten-metal-filtration","tag-porous-ceramic-filters","tag-use-of-molten-aluminum-filter","tag-zirconia-foam-filter"],"yoast_head":"<!-- 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