{"id":14858,"date":"2026-01-07T07:34:58","date_gmt":"2026-01-07T07:34:58","guid":{"rendered":"https:\/\/www.ball-mill-classifiers.com\/?post_type=astra-portfolio&#038;p=14858"},"modified":"2026-01-07T07:35:00","modified_gmt":"2026-01-07T07:35:00","slug":"high-grade-cement-d90-20-%ce%bcm-ultrafine-grinding-production-line-in-lebanon","status":"publish","type":"astra-portfolio","link":"https:\/\/www.ball-mill-classifiers.com\/fr\/astra-portfolio\/high-grade-cement-d90-20-%ce%bcm-ultrafine-grinding-production-line-in-lebanon\/","title":{"rendered":"Ligne de production de broyage ultrafin de ciment de haute qualit\u00e9 (D90\u00a0: 20\u00a0\u00b5m) au Liban"},"content":{"rendered":"<p><strong>Contexte du projet\u00a0:<\/strong> Un important cimentier libanais souhaitait se d\u00e9velopper sur le march\u00e9 des b\u00e9tons sp\u00e9ciaux et des mat\u00e9riaux de construction haute performance. Pour ce faire, il recherchait une solution de broyage ultrafin avanc\u00e9e pour transformer le clinker de ciment conventionnel en une poudre ultrafine. La finesse requise \u00e9tait de D90 \u2264 20 \u03bcm (correspondant \u00e0 une surface sp\u00e9cifique d&#039;environ 600 \u00e0 800 m\u00b2\/kg), nettement inf\u00e9rieure \u00e0 celle du ciment Portland ordinaire. L&#039;objectif \u00e9tait d&#039;am\u00e9liorer la r\u00e9sistance \u00e0 jeune \u00e2ge et la densit\u00e9 de la matrice en augmentant la r\u00e9activit\u00e9 des particules.<\/p>\n\n\n\n<p><strong>Principaux d\u00e9fis\u00a0:<\/strong> <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Caract\u00e9ristiques du mat\u00e9riau :<\/strong> Le clinker de ciment pr\u00e9sente une duret\u00e9 \u00e9lev\u00e9e (Mohs 5\u20136). Lors du broyage, il g\u00e9n\u00e8re facilement de la chaleur, ce qui peut nuire \u00e0 l&#039;efficacit\u00e9 du broyage.<\/li>\n\n\n\n<li><strong>Exigence de finesse rigoureuse\u00a0:<\/strong> <strong>D90 = 20 \u03bcm<\/strong> Elle se situe dans la gamme des poudres ultrafines, au-del\u00e0 de la capacit\u00e9 des s\u00e9parateurs de ciment conventionnels \u00e0 atteindre des points de coupe aussi pr\u00e9cis.<\/li>\n\n\n\n<li><strong>Contr\u00f4le de la consommation d&#039;\u00e9nergie\u00a0:<\/strong> Tout en conservant une finesse extr\u00eame, le syst\u00e8me optimise la consommation d&#039;\u00e9nergie par tonne afin de rester comp\u00e9titif en termes de co\u00fbts.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-solution-ball-mill-itc-ultrafine-air-classifier-cement-ultrafine-grinding-line\">Solution: <a href=\"https:\/\/www.ball-mill-classifiers.com\/fr\/categorie-produit\/ball-mill-classifier\/\">Broyeur \u00e0 billes<\/a> + ITC <a href=\"https:\/\/www.ball-mill-classifiers.com\/fr\/categorie-produit\/air-classifier\/\">Classificateur d&#039;air ultrafin<\/a> Ligne de broyage ultrafin du ciment<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"750\" height=\"455\" src=\"https:\/\/www.ball-mill-classifiers.com\/wp-content\/uploads\/2025\/06\/ball-mill-8.webp\" alt=\"ball mill 8\" class=\"wp-image-14361\" srcset=\"https:\/\/www.ball-mill-classifiers.com\/wp-content\/uploads\/2025\/06\/ball-mill-8.webp 750w, https:\/\/www.ball-mill-classifiers.com\/wp-content\/uploads\/2025\/06\/ball-mill-8-300x182.webp 300w, https:\/\/www.ball-mill-classifiers.com\/wp-content\/uploads\/2025\/06\/ball-mill-8-18x12.webp 18w, https:\/\/www.ball-mill-classifiers.com\/wp-content\/uploads\/2025\/06\/ball-mill-8-600x364.webp 600w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><figcaption class=\"wp-element-caption\">broyeur \u00e0 boulets 8<\/figcaption><\/figure>\n\n\n\n<p><a href=\"https:\/\/www.ball-mill-classifiers.com\/fr\/\">Poudre \u00e9pique<\/a> nous avons con\u00e7u un syst\u00e8me \u00ab broyeur \u00e0 boulets + classificateur \u00bb en circuit ferm\u00e9 sur mesure pour ce projet de broyage ultrafin de ciment, combinant les performances de broyage stables d&#039;un broyeur \u00e0 boulets avec la capacit\u00e9 de classification ultrafine de haute pr\u00e9cision du classificateur \u00e0 air ITC.<\/p>\n\n\n\n<p><strong>Avantages du syst\u00e8me de base<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Broyeur \u00e0 boulets :<\/strong> Servant d&#039;unit\u00e9 de broyage primaire, le broyeur pr\u00e9-broie le clinker \u00e0 la taille interm\u00e9diaire cible en optimisant la conception du rev\u00eatement et le calibrage des m\u00e9dias de broyage (billes d&#039;acier \/ cylindres d&#039;acier).<\/li>\n\n\n\n<li><strong>Classificateur vertical s\u00e9rie ITC\u00a0:<\/strong> L&#039;\u00e9quipement cl\u00e9 pour atteindre D90 \u2264 20 \u03bcm.\n<ul class=\"wp-block-list\">\n<li><strong>Classification de haute pr\u00e9cision :<\/strong> Le classificateur ITC est dot\u00e9 d&#039;une conception verticale \u00e0 rotor unique ou multiple. Un variateur de fr\u00e9quence contr\u00f4le avec pr\u00e9cision la vitesse de la roue du classificateur, garantissant ainsi un point de coupe extr\u00eamement stable.<\/li>\n\n\n\n<li><strong>Conception du syst\u00e8me d&#039;admission d&#039;air secondaire\u00a0:<\/strong> Le syst\u00e8me introduit de l&#039;air secondaire filtr\u00e9 pour s\u00e9parer compl\u00e8tement les particules fines des grains grossiers, am\u00e9liorant ainsi consid\u00e9rablement l&#039;efficacit\u00e9 du classement.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Flux de processus<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u00c9tape de broyage :<\/strong> Le clinker de ciment est introduit dans le broyeur \u00e0 boulets par le syst\u00e8me d&#039;alimentation. Lors de la rotation du broyeur, les billes de broyage percutent et broient le mat\u00e9riau.<\/li>\n\n\n\n<li><strong>Transport pneumatique :<\/strong> Le syst\u00e8me transporte les mat\u00e9riaux broy\u00e9s vers le classificateur ultrafin ITC \u00e0 l&#039;aide d&#039;un \u00e9l\u00e9vateur \u00e0 godets ou d&#039;un syst\u00e8me de convoyage \u00e0 pression n\u00e9gative.<\/li>\n\n\n\n<li><strong>Classification pr\u00e9cise :<\/strong>\n<ul class=\"wp-block-list\">\n<li><strong>Produit de qualit\u00e9 sup\u00e9rieure :<\/strong> Le flux d&#039;air transporte la poudre fine r\u00e9pondant \u00e0 l&#039;exigence D90 \u2264 20 \u03bcm \u00e0 travers la roue de classification. Un cyclone \u00e0 haut rendement et un filtre \u00e0 sac puls\u00e9 r\u00e9cup\u00e8rent ensuite le produit, qui est conditionn\u00e9 pour obtenir le produit final.<\/li>\n\n\n\n<li><strong>Retour des particules grossi\u00e8res :<\/strong> Les particules surdimensionn\u00e9es (&gt;20 \u03bcm) sont \u00e9vacu\u00e9es par gravit\u00e9 du bas du classificateur. Un convoyeur \u00e0 vis transf\u00e8re ces particules grossi\u00e8res vers l&#039;entr\u00e9e du broyeur \u00e0 boulets pour un broyage secondaire.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Refroidissement et contr\u00f4le de la poussi\u00e8re :<\/strong> L&#039;ensemble du syst\u00e8me fonctionne en d\u00e9pression. Le flux d&#039;air g\u00e9n\u00e9r\u00e9 par le proc\u00e9d\u00e9 contribue \u00e0 \u00e9vacuer la chaleur de broyage, emp\u00eachant ainsi la d\u00e9shydratation du ciment.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">R\u00e9sultats du projet<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Param\u00e8tre cl\u00e9<\/th><th>Donn\u00e9es d&#039;exploitation sur site<\/th><\/tr><\/thead><tbody><tr><td>Mati\u00e8res transform\u00e9es<\/td><td>Clinker de ciment<\/td><\/tr><tr><td>finesse du produit<\/td><td>D90 \u2264 20 \u03bcm<\/td><\/tr><tr><td>surface sp\u00e9cifique<\/td><td>750 \u2013 800 m\u00b2\/kg<\/td><\/tr><tr><td>Pr\u00e9cision de la classification<\/td><td>Distribution granulom\u00e9trique tr\u00e8s \u00e9troite, exempte de contamination par des particules grossi\u00e8res<\/td><\/tr><tr><td>performance environnementale<\/td><td>Concentration des \u00e9missions &lt; 20 mg\/Nm\u00b3<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<div 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