{"id":15654,"date":"2025-07-22T03:57:16","date_gmt":"2025-07-22T03:57:16","guid":{"rendered":"https:\/\/www.jet-mills.com\/?p=15654"},"modified":"2025-07-22T07:58:59","modified_gmt":"2025-07-22T07:58:59","slug":"what-are-the-factors-that-affect-the-pulverization-effect","status":"publish","type":"post","link":"https:\/\/www.jet-mills.com\/fr\/what-are-the-factors-that-affect-the-pulverization-effect\/","title":{"rendered":"Quels sont les facteurs qui affectent l\u2019effet de pulv\u00e9risation ?"},"content":{"rendered":"<p>Ces derni\u00e8res ann\u00e9es, le d\u00e9veloppement industriel rapide de la Chine a cr\u00e9\u00e9 de nouvelles opportunit\u00e9s pour l&#039;industrie des \u00e9quipements m\u00e9caniques dans le domaine de la transformation en profondeur. La granulom\u00e9trie joue un r\u00f4le crucial dans la biodisponibilit\u00e9 de certains produits m\u00e9dicaux, rendant la pulv\u00e9risation indispensable. Le pulv\u00e9risateur \u00e0 air est devenu essentiel dans la pulv\u00e9risation pharmaceutique gr\u00e2ce \u00e0 sa basse temp\u00e9rature, son cycle de production court et son taux \u00e9lev\u00e9 de r\u00e9cup\u00e9ration de poudre. Il assure une distribution granulom\u00e9trique fine et uniforme. Le pulv\u00e9risateur \u00e0 air, \u00e9galement appel\u00e9 pulv\u00e9risateur \u00e0 air, <a href=\"\/fr\/products\/fluidized-bed-jet-mill-supplier\/\" data-internallinksmanager029f6b8e52c=\"9\" title=\"Moulin \u00e0 jet\" target=\"_blank\" rel=\"noopener\">broyeur \u00e0 jet<\/a>Le broyeur \u00e0 jet, ou broyeur \u00e0 flux d&#039;\u00e9nergie, utilise un flux d&#039;air \u00e0 grande vitesse (300-500 m\/s) ou de la vapeur surchauff\u00e9e (300-400 \u00b0C) pour pulv\u00e9riser ultrafinement les mat\u00e9riaux solides. Largement utilis\u00e9, le broyeur \u00e0 air est utilis\u00e9 pour les mat\u00e9riaux extra-durs, notamment les produits chimiques, pharmaceutiques, alimentaires et les poudres m\u00e9talliques. Certains clients ont indiqu\u00e9 que, malgr\u00e9 la large gamme de granulom\u00e9tries disponibles, l&#039;effet de pulv\u00e9risation varie. Pourquoi\u00a0?<\/p>\n\n\n\n<p>L&#039;effet de pulv\u00e9risation dans un broyeur \u00e0 jet d&#039;air est influenc\u00e9 par des facteurs tels que le rapport gaz-solide, la taille des particules d&#039;alimentation, la temp\u00e9rature et la pression du fluide de travail et les auxiliaires de pulv\u00e9risation.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"721\" src=\"https:\/\/www.jet-mills.com\/wp-content\/uploads\/2025\/07\/\u56fe\u724700001_\u526f\u672c_\u526f\u672c-1-1024x721.webp\" alt=\"\" class=\"wp-image-15661\" style=\"width:1042px;height:auto\" srcset=\"https:\/\/www.jet-mills.com\/wp-content\/uploads\/2025\/07\/\u56fe\u724700001_\u526f\u672c_\u526f\u672c-1-1024x721.webp 1024w, https:\/\/www.jet-mills.com\/wp-content\/uploads\/2025\/07\/\u56fe\u724700001_\u526f\u672c_\u526f\u672c-1-300x211.webp 300w, https:\/\/www.jet-mills.com\/wp-content\/uploads\/2025\/07\/\u56fe\u724700001_\u526f\u672c_\u526f\u672c-1-768x541.webp 768w, https:\/\/www.jet-mills.com\/wp-content\/uploads\/2025\/07\/\u56fe\u724700001_\u526f\u672c_\u526f\u672c-1-1536x1081.webp 1536w, https:\/\/www.jet-mills.com\/wp-content\/uploads\/2025\/07\/\u56fe\u724700001_\u526f\u672c_\u526f\u672c-1-18x12.webp 18w, https:\/\/www.jet-mills.com\/wp-content\/uploads\/2025\/07\/\u56fe\u724700001_\u526f\u672c_\u526f\u672c-1-600x422.webp 600w, https:\/\/www.jet-mills.com\/wp-content\/uploads\/2025\/07\/\u56fe\u724700001_\u526f\u672c_\u526f\u672c-1.webp 1710w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Rapport gaz-solide<\/h2>\n\n\n\n<p>Le rapport gaz-solide dans le broyeur \u00e0 jet d&#039;air pendant la pulv\u00e9risation est un param\u00e8tre technique et un indicateur crucial.<br>Si le rapport gaz\/solide est trop faible, l&#039;\u00e9nergie cin\u00e9tique du flux d&#039;air sera insuffisante, ce qui affectera la finesse du produit. En revanche, un rapport gaz\/solide trop \u00e9lev\u00e9 entra\u00eenera non seulement un gaspillage d&#039;\u00e9nergie, mais aussi une d\u00e9gradation des performances de dispersion de certains pigments.<br>Les techniciens recommandent que, lors de l&#039;utilisation de vapeur surchauff\u00e9e comme fluide de travail, le rapport gaz-solide soit g\u00e9n\u00e9ralement contr\u00f4l\u00e9 \u00e0 2 \u00e0 4:1 pour la pulv\u00e9risation de mat\u00e9riaux durs apr\u00e8s calcination, et \u00e0 1 \u00e0 2:1 pour la pulv\u00e9risation de mat\u00e9riaux trait\u00e9s en surface.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img decoding=\"async\" width=\"1024\" height=\"577\" src=\"https:\/\/www.jet-mills.com\/wp-content\/uploads\/2025\/07\/Ultrafine-Barium-Sulfate-1024x577.webp\" alt=\"\" class=\"wp-image-15662\" style=\"width:1058px;height:auto\" srcset=\"https:\/\/www.jet-mills.com\/wp-content\/uploads\/2025\/07\/Ultrafine-Barium-Sulfate-1024x577.webp 1024w, https:\/\/www.jet-mills.com\/wp-content\/uploads\/2025\/07\/Ultrafine-Barium-Sulfate-300x169.webp 300w, https:\/\/www.jet-mills.com\/wp-content\/uploads\/2025\/07\/Ultrafine-Barium-Sulfate-768x433.webp 768w, https:\/\/www.jet-mills.com\/wp-content\/uploads\/2025\/07\/Ultrafine-Barium-Sulfate-18x10.webp 18w, https:\/\/www.jet-mills.com\/wp-content\/uploads\/2025\/07\/Ultrafine-Barium-Sulfate-600x338.webp 600w, https:\/\/www.jet-mills.com\/wp-content\/uploads\/2025\/07\/Ultrafine-Barium-Sulfate.webp 1036w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Taille des particules d&#039;alimentation<\/h2>\n\n\n\n<p>Lors du broyage de mat\u00e9riaux durs, la granulom\u00e9trie de l&#039;aliment doit \u00e9galement r\u00e9pondre \u00e0 des exigences strictes.<br>Pour la poudre de titane, le broyage des mat\u00e9riaux calcin\u00e9s doit \u00eatre contr\u00f4l\u00e9 \u00e0 100-200 mesh, tandis que le broyage des mat\u00e9riaux trait\u00e9s en surface doit g\u00e9n\u00e9ralement \u00eatre compris entre 40 et 70 mesh et ne peut pas d\u00e9passer 2 \u00e0 5 mesh.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Temp\u00e9rature du fluide de travail<\/h2>\n\n\n\n<p>Les techniciens expliquent que lorsque la temp\u00e9rature du fluide de travail est trop \u00e9lev\u00e9e, le d\u00e9bit du gaz augmente.<\/p>\n\n\n\n<p>Par exemple, la vitesse critique de l&#039;air \u00e0 temp\u00e9rature ambiante est de 320 m\/s. Lorsque la temp\u00e9rature atteint 480 \u00b0C, elle passe \u00e0 500 m\/s, ce qui signifie que l&#039;\u00e9nergie cin\u00e9tique augmente de 150%. Par cons\u00e9quent, l&#039;augmentation de la temp\u00e9rature du fluide de travail contribue \u00e0 am\u00e9liorer l&#039;effet de broyage.<\/p>\n\n\n\n<p>Lors du broyage de poudre de titane, la temp\u00e9rature de la vapeur surchauff\u00e9e est g\u00e9n\u00e9ralement d&#039;environ 300 \u00e0 400 \u00b0C. Les techniciens indiquent que la temp\u00e9rature est g\u00e9n\u00e9ralement plus \u00e9lev\u00e9e lors de la pulv\u00e9risation et de la calcination, et plus basse lors de la pulv\u00e9risation de mat\u00e9riaux trait\u00e9s en surface. \u00ab Certains agents de traitement de surface, notamment organiques, ne r\u00e9sistent pas \u00e0 la chaleur\u00a0; il suffit donc de les surchauffer de 100 \u00b0C au-dessus de la temp\u00e9rature initiale de la vapeur. \u00bb<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img decoding=\"async\" width=\"1024\" height=\"134\" src=\"https:\/\/www.jet-mills.com\/wp-content\/uploads\/2025\/07\/640-69-1024x134.png\" alt=\"\" class=\"wp-image-15657\" style=\"width:1130px;height:auto\" srcset=\"https:\/\/www.jet-mills.com\/wp-content\/uploads\/2025\/07\/640-69-1024x134.png 1024w, https:\/\/www.jet-mills.com\/wp-content\/uploads\/2025\/07\/640-69-300x39.png 300w, https:\/\/www.jet-mills.com\/wp-content\/uploads\/2025\/07\/640-69-768x100.png 768w, https:\/\/www.jet-mills.com\/wp-content\/uploads\/2025\/07\/640-69-18x2.png 18w, https:\/\/www.jet-mills.com\/wp-content\/uploads\/2025\/07\/640-69-600x78.png 600w, https:\/\/www.jet-mills.com\/wp-content\/uploads\/2025\/07\/640-69.png 1078w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Pression du fluide de travail<\/h2>\n\n\n\n<p>La pression du fluide de travail est un param\u00e8tre cl\u00e9 pour g\u00e9n\u00e9rer la vitesse d&#039;\u00e9coulement du jet et affecte consid\u00e9rablement la finesse de la pulv\u00e9risation. En g\u00e9n\u00e9ral, plus la pression du fluide de travail est \u00e9lev\u00e9e, plus la vitesse et l&#039;\u00e9nergie cin\u00e9tique sont \u00e9lev\u00e9es.<\/p>\n\n\n\n<p>Mais quelle pression faut-il appliquer pour la pulv\u00e9risation\u00a0? Les techniciens affirment que cela d\u00e9pend principalement des exigences de broyage et de finesse du mat\u00e9riau. Par exemple, lors de la pulv\u00e9risation de poudre de titane \u00e0 la vapeur surchauff\u00e9e, la pression de vapeur est g\u00e9n\u00e9ralement comprise entre 0,8 et 1,7\u00a0MPa. La pression de pulv\u00e9risation des mat\u00e9riaux calcin\u00e9s est g\u00e9n\u00e9ralement plus \u00e9lev\u00e9e, tandis que celle des mat\u00e9riaux trait\u00e9s en surface peut \u00eatre plus faible.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">auxiliaires de pulv\u00e9risation<\/h2>\n\n\n\n<p>Les techniciens notent que l&#039;ajout d&#039;aides \u00e0 la pulv\u00e9risation appropri\u00e9es pendant le processus de pulv\u00e9risation peut am\u00e9liorer \u00e0 la fois l&#039;efficacit\u00e9 de la pulv\u00e9risation et les performances de dispersion du produit dans le milieu.<\/p>\n\n\n\n<p>Alors, comment choisir les auxiliaires de pulv\u00e9risation ?<\/p>\n\n\n\n<p>Lors du traitement de surface du dioxyde de titane, la plupart des tensioactifs organiques utilis\u00e9s servent \u00e9galement d&#039;adjuvants de broyage. Les adjuvants de broyage inorganiques comprennent g\u00e9n\u00e9ralement l&#039;hexam\u00e9taphosphate de sodium et le pyrophosphate de sodium (potassium).<\/p>\n\n\n\n<p><a href=\"https:\/\/www.jet-mills.com\/fr\/products\/\">Machines \u00e0 poudre \u00e9piques<\/a> propose des broyeurs \u00e0 jet d&#039;air de pointe, con\u00e7us pour optimiser l&#039;effet de pulv\u00e9risation et garantir une qualit\u00e9 de produit sup\u00e9rieure. Soucieux de la satisfaction de ses clients, <a href=\"https:\/\/www.jet-mills.com\/fr\/about-us\/\" data-internallinksmanager029f6b8e52c=\"1\" title=\"EPIC\">Poudre \u00e9pique<\/a> fournit des \u00e9quipements de haute performance pour r\u00e9pondre aux divers besoins des industries du monde entier.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"Moulin \u00e0 jet EPIC - Exp\u00e9rience de broyage d&#039;amidon de ma\u00efs pr\u00e9g\u00e9latinis\u00e9 et d&#039;amidon de ma\u00efs\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/Lmw4hiy1gnQ?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<div 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