{"id":12011,"date":"2024-11-18T10:00:31","date_gmt":"2024-11-18T09:00:31","guid":{"rendered":"https:\/\/sxe-consulting.com\/?p=12011"},"modified":"2024-11-19T11:22:08","modified_gmt":"2024-11-19T10:22:08","slug":"composition-of-refractory-products","status":"publish","type":"post","link":"https:\/\/sxe-consulting.com\/en\/composition-des-produits-refractaires\/","title":{"rendered":"Composition of refractory products"},"content":{"rendered":"<p>La composition des produits r\u00e9fractaires varie consid\u00e9rablement en fonction de leur application sp\u00e9cifique, de l&#8217;intensit\u00e9 des temp\u00e9ratures auxquelles ils sont expos\u00e9s, et des environnements chimiques auxquels ils doivent r\u00e9sister. En plus des cat\u00e9gories classiques de mat\u00e9riaux oxidiques et non oxidiques, il existe \u00e9galement une classe de r\u00e9fractaires sp\u00e9cialis\u00e9s appel\u00e9e <a href=\"https:\/\/archives.saint-gobain.com\/ressource\/xxe\/1929\/1929-saint-gobain-et-corning-glass-works-creent-une-unite-de-production-de\" target=\"_blank\" rel=\"noopener\"><em>Fused-Cast Refractories<\/em><\/a>. These are produced by melting the raw materials at extremely high temperatures (above 2000 \u00b0C) in electric furnaces, which gives the final products exceptional properties in terms of resistance and purity.<\/p>\n<p><strong>Oxide Refractory Materials<\/strong><\/p>\n<p><span style=\"color: #000000;\">Oxide refractory materials are mainly composed of metal oxides such as:<\/span><\/p>\n<ul>\n<li><span style=\"color: #000000;\"><strong>Silica (SiO\u2082)<\/strong> : Silica is a common refractory material, offering good resistance to high temperatures and excellent chemical inertness in acidic environments. It is often used in glass furnaces.<\/span><\/li>\n<li><span style=\"color: #000000;\"><strong>Alumina (Al\u2082O\u2083)<\/strong> : Alumina is a highly refractory material, widely used for its great thermal stability and resistance to thermal shock. It is commonly used in industrial furnaces and metallurgical plants.<\/span><\/li>\n<li><span style=\"color: #000000;\"><strong>Magnesia (MgO)<\/strong> : Magnesia is a basic refractory material that withstands corrosive environments, particularly in the steel and cement industries. It is especially effective against basic slags.<\/span><\/li>\n<li><span style=\"color: #000000;\"><strong>Lime (CaO)<\/strong> : Lime is mainly used in basic refractories for the steel industry. It offers adequate resistance to chemical reactions with acidic and basic slags.<\/span><\/li>\n<\/ul>\n<p><span style=\"color: #000000;\"><strong>Non-Oxide Refractory Materials<\/strong><\/span><\/p>\n<p><span style=\"color: #000000;\">Les mat\u00e9riaux non oxidiques sont souvent utilis\u00e9s dans des environnements tr\u00e8s sp\u00e9cifiques o\u00f9 une r\u00e9sistance extr\u00eame \u00e0 la corrosion et \u00e0 l&#8217;oxydation est n\u00e9cessaire. Parmi ces mat\u00e9riaux, on trouve:<\/span><\/p>\n<ul>\n<li><span style=\"color: #000000;\"><strong>Silicon carbide (SiC)<\/strong> : This material stands out for its excellent thermal conductivity and high resistance to oxidation. It is widely used in glassworks furnaces and in applications requiring high mechanical strength at high temperature.<\/span><\/li>\n<li><span style=\"color: #000000;\"><strong>Boron nitride (BN)<\/strong> : Utilis\u00e9 dans des applications sp\u00e9cifiques, notamment dans les environnements tr\u00e8s corrosifs et abrasifs. Le nitrure de bore est souvent employ\u00e9 pour les creusets de fusion de m\u00e9taux pr\u00e9cieux et certains composants de l&#8217;industrie nucl\u00e9aire.<\/span><\/li>\n<li><span style=\"color: #000000;\"><strong>Zirconium boride (ZrB\u2082)<\/strong> : Another non-oxide material distinguished by its resistance to extreme temperatures and its chemical stability. It is mainly used in aerospace applications and for specialised metal melting equipment.<\/span><\/li>\n<\/ul>\n<p><span style=\"color: #000000;\"><strong>R\u00e9fractaires \u00c9lectrofondus<\/strong><\/span><\/p>\n<p><span style=\"color: #000000;\">Fused-cast refractories are manufactured using a melting process in electric furnaces, where the raw materials are melted to form extremely resistant crystals. Among these refractories, some particularly remarkable types are used in high-technology and intensive-production industries:<\/span><\/p>\n<ul>\n<li><span style=\"color: #000000;\"><strong>AZS (Alumina-Zirconia-Silica)<\/strong> : Fused-cast AZS refractory is widely used in the glass industry, particularly in glass melting furnaces. It combines alumina, zirconia and silica, giving it exceptional resistance to corrosion caused by molten glass. Its very dense microstructure and chemical composition also guarantee low permeability to gases and liquids, which reduces the risk of inclusions and defects in the glass.<\/span><\/li>\n<li><span style=\"color: #000000;\"><strong>Alpha-beta alumina<\/strong> : Ce r\u00e9fractaire \u00e9lectrofondu se compose de deux phases d&#8217;alumine, appel\u00e9es alpha et b\u00eata, ce qui am\u00e9liore sa stabilit\u00e9 thermique et sa r\u00e9sistance aux attaques chimiques. Ce type de r\u00e9fractaire est principalement utilis\u00e9 dans les environnements extr\u00eamement corrosifs et \u00e0 haute temp\u00e9rature, comme les fours de fusion pour m\u00e9taux non ferreux et les applications de l&#8217;industrie chimique. Sa composition lui conf\u00e8re une excellente r\u00e9sistance \u00e0 l\u2019\u00e9rosion et une grande long\u00e9vit\u00e9, m\u00eame dans des conditions de service intensif.<\/span><\/li>\n<li><span style=\"color: #000000;\"><strong>Fused-cast zirconia<\/strong> : Composed mainly of zirconia (ZrO\u2082), fused-cast zirconia is used in applications where very high resistance to thermal shock and corrosion is required. It is often employed in the metallurgical and ceramics industries, where it protects equipment against extreme temperatures and chemical attack.<\/span><\/li>\n<\/ul>\n<p><span style=\"color: #000000;\">Thanks to their unique manufacturing process, fused-cast refractories exhibit exceptional properties. In addition to their high mechanical and thermal resistance, they are also particularly dense and offer low permeability. This makes them ideal for applications in aggressive chemical environments, where resistance to the infiltration of slags and corrosive gases is paramount.<\/span><\/p>\n<p><span style=\"color: #000000;\"><strong>Conclusion<\/strong><\/span><\/p>\n<p><span style=\"color: #000000;\">La composition des produits r\u00e9fractaires joue un r\u00f4le crucial dans leur performance en environnement extr\u00eame. Du carbure de silicium aux r\u00e9fractaires \u00e9lectrofondus comme l&#8217;AZS et l&#8217;alumine alpha-b\u00eata, chaque type de <a style=\"color: #000000;\" href=\"https:\/\/sxe-consulting.com\/en\/refractories-a-shield-against-extreme-heat\/\">refractory<\/a> offre des caract\u00e9ristiques sp\u00e9cifiques adapt\u00e9es aux exigences des industries. Le choix du r\u00e9fractaire d\u00e9pendra des conditions d\u2019exploitation, notamment la temp\u00e9rature, les contraintes m\u00e9caniques, et l&#8217;exposition \u00e0 des agents corrosifs. Ces produits r\u00e9fractaires, en assurant la protection des \u00e9quipements et en permettant une production fiable et continue, constituent des \u00e9l\u00e9ments essentiels de l&#8217;industrie moderne.<\/span><\/p>","protected":false},"excerpt":{"rendered":"<p>La composition des produits r\u00e9fractaires varie consid\u00e9rablement en fonction de leur application sp\u00e9cifique, de l&#8217;intensit\u00e9 des temp\u00e9ratures auxquelles ils sont expos\u00e9s, et des environnements chimiques auxquels ils doivent r\u00e9sister. En plus des cat\u00e9gories classiques de mat\u00e9riaux oxidiques et non oxidiques, il existe \u00e9galement une classe de r\u00e9fractaires sp\u00e9cialis\u00e9s appel\u00e9e r\u00e9fractaires \u00e9lectrofondus. Ceux-ci sont produits par [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":12012,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[91],"tags":[],"class_list":["post-12011","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-refractaires"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/sxe-consulting.com\/wp-content\/uploads\/2024\/11\/471693_1_En_1_Fig2_HTML.png","_links":{"self":[{"href":"https:\/\/sxe-consulting.com\/en\/wp-json\/wp\/v2\/posts\/12011","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sxe-consulting.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sxe-consulting.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sxe-consulting.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sxe-consulting.com\/en\/wp-json\/wp\/v2\/comments?post=12011"}],"version-history":[{"count":0,"href":"https:\/\/sxe-consulting.com\/en\/wp-json\/wp\/v2\/posts\/12011\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sxe-consulting.com\/en\/wp-json\/wp\/v2\/media\/12012"}],"wp:attachment":[{"href":"https:\/\/sxe-consulting.com\/en\/wp-json\/wp\/v2\/media?parent=12011"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sxe-consulting.com\/en\/wp-json\/wp\/v2\/categories?post=12011"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sxe-consulting.com\/en\/wp-json\/wp\/v2\/tags?post=12011"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}