{"id":2095,"date":"2020-05-29T03:46:35","date_gmt":"2020-05-29T03:46:35","guid":{"rendered":"http:\/\/alalloycasting.com\/?p=2095"},"modified":"2022-06-10T01:31:21","modified_gmt":"2022-06-10T01:31:21","slug":"porous-ceramic-filter","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/porous-ceramic-filter\/","title":{"rendered":"Filtre en c\u00e9ramique poreuse"},"content":{"rendered":"<p>Un filtre c\u00e9ramique poreux est un type de mat\u00e9riau c\u00e9ramique compos\u00e9 de mati\u00e8res premi\u00e8res r\u00e9fractaires servant d'agr\u00e9gats, associ\u00e9es \u00e0 un liant et soumises \u00e0 un frittage \u00e0 haute temp\u00e9rature. Sa structure pr\u00e9sente un grand nombre de pores fins dont le diam\u00e8tre est contr\u00f4lable. Outre sa r\u00e9sistance aux hautes temp\u00e9ratures, \u00e0 la haute pression, aux acides et \u00e0 la corrosion alcaline, etc., il se caract\u00e9rise \u00e9galement par une taille de pores uniforme et une perm\u00e9abilit\u00e9 \u00e9lev\u00e9e. La c\u00e9ramique poreuse peut donc \u00eatre largement utilis\u00e9e comme mat\u00e9riau de filtration, de s\u00e9paration, de distribution de gaz et d\u2019att\u00e9nuation du bruit. \u00c0 l\u2019heure actuelle, gr\u00e2ce \u00e0 leurs caract\u00e9ristiques fonctionnelles uniques, les filtres en c\u00e9ramique sont devenus un produit incontournable dans le domaine de la s\u00e9paration et de la purification.<\/p>\n<h2>Filtre en c\u00e9ramique poreuse<\/h2>\n<h3>Performances<\/h3>\n<p>Il existe diff\u00e9rents types de <a href=\"https:\/\/www.alalloycasting.com\/fr\/foam-ceramic-material\/\">mat\u00e9riaux c\u00e9ramiques poreux<\/a> et leurs caract\u00e9ristiques techniques. Parmi ceux-ci, les mat\u00e9riaux utilis\u00e9s pour les c\u00e9ramiques poreuses sont principalement le silicate d'aluminium, l'argile, le corindon, le quartz, le carbure de silicium et la terre de diatom\u00e9es. Les performances des \u00e9l\u00e9ments filtrants en c\u00e9ramique poreuse portent principalement sur les aspects suivants :<\/p>\n<ol>\n<li>Ouverture : taille des pores du produit ; ce terme d\u00e9signe ici le diam\u00e8tre maximal de l'ouverture du produit. La taille des pores des \u00e9l\u00e9ments filtrants en c\u00e9ramique poreuse peut \u00eatre class\u00e9e dans les s\u00e9ries 1, 5, 10, 20, 30, 50, 80, 100, 120, 150, 200, 250 et 300 Lm.<\/li>\n<li>Porosit\u00e9 : Volume des pores ouverts du produit, exprim\u00e9 en pourcentage du volume total (V ouvert \/ V total).<br \/>\nPerm\u00e9abilit\u00e9 K : quantit\u00e9 de gaz sec (m\u00b3) traversant une c\u00e9ramique poreuse d'une \u00e9paisseur de 1 cm et d'une surface de 1 m\u00b2 pendant une dur\u00e9e unitaire de 1 h, sous une diff\u00e9rence de pression de 1 mm H\u2082O.<\/li>\n<li>R\u00e9sistance \u00e0 l'acide : rapport entre la r\u00e9sistance \u00e0 la flexion des produits c\u00e9ramiques poreux et leur r\u00e9sistance \u00e0 la flexion avant corrosion, apr\u00e8s avoir \u00e9t\u00e9 plong\u00e9s pendant 1 heure dans une solution d'acide sulfurique 20%.<\/li>\n<li>R\u00e9sistance aux alcalis : apr\u00e8s avoir tremp\u00e9 le produit c\u00e9ramique poreux dans une solution de NaOH \u00e0 20% pendant 1 heure, on calcule son degr\u00e9 de flexion ainsi que le pourcentage de r\u00e9sistance \u00e0 la flexion avant corrosion.<\/li>\n<li>R\u00e9sistance \u00e0 la temp\u00e9rature : Capacit\u00e9 des produits c\u00e9ramiques poreux \u00e0 r\u00e9sister aux variations de temp\u00e9rature sans subir de dommages.<\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3787\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/05\/Porous-Ceramic-Filter-1.jpg\" alt=\"Filtre en c\u00e9ramique poreuse\" width=\"800\" height=\"600\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/05\/Porous-Ceramic-Filter-1.jpg 800w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/05\/Porous-Ceramic-Filter-1-300x225.jpg 300w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/05\/Porous-Ceramic-Filter-1-768x576.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/p>\n<h3>Caract\u00e9ristiques<\/h3>\n<p>Par rapport \u00e0 d'autres mat\u00e9riaux filtrants, les c\u00e9ramiques poreuses pr\u00e9sentent les caract\u00e9ristiques suivantes en tant que mat\u00e9riaux filtrants.<\/p>\n<ul>\n<li>Le mat\u00e9riau filtrant c\u00e9ramique poreux pr\u00e9sente une porosit\u00e9 \u00e9lev\u00e9e, pouvant atteindre 60%. La taille des pores est uniforme et facile \u00e0 contr\u00f4ler. Il offre une grande pr\u00e9cision de filtration, pouvant atteindre 011Lm, ce qui le rend adapt\u00e9 \u00e0 la filtration de pr\u00e9cision de divers milieux.<\/li>\n<li>Bonne r\u00e9sistance aux acides et aux alcalis. Il peut \u00eatre utilis\u00e9 pour filtrer des acides forts (acide sulfurique, acide nitrique, acide chlorhydrique), des bases fortes (chlorhydrate de sodium, etc.) et divers solvants organiques.<\/li>\n<li>R\u00e9silience m\u00e9canique \u00e9lev\u00e9e, pression de service pouvant atteindre 6 MPa, pression diff\u00e9rentielle pouvant atteindre 1 MPa.<\/li>\n<li>R\u00e9sistance aux hautes temp\u00e9ratures, bonne trempabilit\u00e9 et performances de trempe \u00e0 des temp\u00e9ratures de service pouvant atteindre 800 \u2103. Convient \u00e0 tous les types de filtration de gaz \u00e0 haute temp\u00e9rature.<\/li>\n<li>L'\u00e9l\u00e9ment filtrant lui-m\u00eame est propre, non toxique, inodore et exempt de corps \u00e9trangers. Il est adapt\u00e9 aux op\u00e9rations de traitement aseptique.<\/li>\n<li>L'\u00e9l\u00e9ment filtrant pr\u00e9sente une longue dur\u00e9e de vie ; m\u00eame apr\u00e8s une utilisation prolong\u00e9e, la forme de ses pores reste inchang\u00e9e, ce qui facilite son nettoyage et sa r\u00e9g\u00e9n\u00e9ration.<\/li>\n<\/ul>\n<h2>Principe de filtration par c\u00e9ramique poreuse<\/h2>\n<p><a href=\"http:\/\/www.alalloycasting.com\/fr\/porous-ceramics-filtration\/\">Filtration par c\u00e9ramique poreuse<\/a> Il s'agit d'une combinaison d'adsorption, de filtration en surface et de filtration en profondeur. En ce qui concerne la filtration et la s\u00e9paration, qui sont plus marqu\u00e9es que dans les syst\u00e8mes liquide-solide et gaz-solide, le m\u00e9canisme de filtration repose principalement sur la collision inertielle, la diffusion et l'interception.<\/p>\n<p>Collision inertielle : les particules d'impuret\u00e9s pr\u00e9sentes dans le fluide circulant \u00e0 travers les canaux microporeux de l'\u00e9l\u00e9ment filtrant en c\u00e9ramique poreuse sont pi\u00e9g\u00e9es par contact avec les parois de ces canaux sous l'effet de l'inertie. La collision inertielle est proportionnelle au carr\u00e9 du diam\u00e8tre des particules d'impuret\u00e9s et inversement proportionnelle \u00e0 la vitesse d'\u00e9coulement et \u00e0 la viscosit\u00e9 du fluide.<\/p>\n<p>Diffusion : les particules d'impuret\u00e9s quittent la ligne de courant sous l'effet du mouvement brownien et entrent en contact avec les parois des canaux microporeux, o\u00f9 elles sont alors pi\u00e9g\u00e9es. Le pi\u00e9geage par diffusion est inversement proportionnel au d\u00e9bit et \u00e0 la viscosit\u00e9 du fluide.<\/p>\n<p>Interception : les particules d'impuret\u00e9s sont retenues car elles sont plus grosses que les pores du filtre \u00e0 micropores, qui est un filtre de surface. La r\u00e9tention d\u00e9pend uniquement de la taille des particules d'impuret\u00e9s, et non du d\u00e9bit ni de la viscosit\u00e9 du fluide.<\/p>\n<p>Lorsque le fluide s'\u00e9coule \u00e0 travers l'\u00e9l\u00e9ment filtrant en c\u00e9ramique poreuse, les particules dont la taille est sup\u00e9rieure \u00e0 celle des pores de l'\u00e9l\u00e9ment filtrant sont retenues \u00e0 la surface, formant ainsi une couche de g\u00e2teau de filtration. Certaines particules sont retenues \u00e0 la surface ou se d\u00e9posent dans les canaux poreux de la c\u00e9ramique.<\/p>","protected":false},"excerpt":{"rendered":"<p>A porous ceramic filter is a kind of ceramic material made of refractory raw material as aggregate, combined with a binder and other high-temperature sintering.&hellip;<\/p>","protected":false},"author":1,"featured_media":3786,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[1718,485,1744,1455,1774,1724,1745,1451,4127,1717,378,4131,105,4122,1705,4132,4121,432,1726,430,1438,1757,1753,753,21,1743,1447,1713,164,653,427,426,4182,811,4123,4183,1702,219,1740,9,4129,425,1732,1735,298,301],"class_list":["post-2095","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-aluminum-casting-ceramic-foam-filter","tag-aluminum-casting-filter","tag-asian-foundry-filter","tag-asian-foundry-filters","tag-cast-filters","tag-casting-ceramic-foam-filter","tag-casting-filters-for-molten-aluminum","tag-ceramic-disc-filter","tag-ceramic-fiber-filters","tag-ceramic-filter-for-aluminum","tag-ceramic-filter-for-aluminum-foundry","tag-ceramic-filter-for-casting","tag-ceramic-filter-for-foundry","tag-ceramic-filter-for-foundry-for-sale","tag-ceramic-filter-for-molten-aluminum","tag-ceramic-filter-for-molten-metal","tag-ceramic-filter-for-sale","tag-ceramic-filter-foundry","tag-ceramic-filter-manufacturing-process","tag-ceramic-filter-media","tag-ceramic-filter-suppliers","tag-ceramic-filters","tag-ceramic-filters-for-foundry","tag-ceramic-foam-casting-filter","tag-ceramic-foam-filter","tag-ceramic-foam-filter-canada","tag-ceramic-foam-filter-china","tag-ceramic-foam-filter-for-aluminum","tag-ceramic-foam-filter-for-aluminum-casting","tag-ceramic-foam-filter-manufacturer","tag-ceramic-foam-filter-manufacturers","tag-ceramic-foam-filter-manufacturing-process","tag-ceramic-foam-filter-pal","tag-ceramic-foam-filter-plate","tag-ceramic-foam-filter-purchasing","tag-ceramic-foam-filter-pzr","tag-ceramic-foam-filter-supplier","tag-ceramic-foam-filter-suppliers","tag-ceramic-foam-filter-with-fiber","tag-ceramic-foam-filters","tag-ceramic-foam-filters-applications","tag-ceramic-foam-filters-for-casting","tag-ceramic-foam-filters-for-foundry","tag-ceramic-foam-filters-manufacturer","tag-porous-ceramic-filter","tag-porous-ceramic-filtration-principle"],"yoast_head":"<!-- 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