{"id":3417,"date":"2025-07-30T11:44:33","date_gmt":"2025-07-30T03:44:33","guid":{"rendered":"https:\/\/calcium-carbonate.epic-powder.com\/?p=3417"},"modified":"2025-07-30T11:52:16","modified_gmt":"2025-07-30T03:52:16","slug":"ground-calcium-carbonate-grinding-surface-modification-technology-and-equipment","status":"publish","type":"post","link":"https:\/\/calcium-carbonate.epic-powder.com\/fr\/ground-calcium-carbonate-grinding-surface-modification-technology-and-equipment\/","title":{"rendered":"Broyage du carbonate de calcium, technologie et \u00e9quipement de modification de surface"},"content":{"rendered":"<p><a href=\"https:\/\/calcium-carbonate.epic-powder.com\/fr\/machines\/\">carbonate de calcium moulu<\/a> Le carbonate de calcium broy\u00e9 est une poudre obtenue par concassage m\u00e9canique \u00e0 partir de minerais tels que la calcite, la craie et le marbre. Il se caract\u00e9rise par une grande diversit\u00e9 de mati\u00e8res premi\u00e8res, une blancheur \u00e9lev\u00e9e, une faible absorption d&#039;huile, une bonne applicabilit\u00e9 et un faible co\u00fbt. Il s&#039;agit de l&#039;une des poudres min\u00e9rales inorganiques non m\u00e9talliques les plus utilis\u00e9es et produites. Actuellement, la technologie de production du carbonate de calcium broy\u00e9 se concentre principalement sur le broyage et la modification de surface, afin d&#039;obtenir des produits de diff\u00e9rentes finesses adapt\u00e9s \u00e0 diverses applications. On trouve notamment des poudres fines, des poudres ultrafines, des poudres \u00e0 surface modifi\u00e9e (activ\u00e9es) et des p\u00e2tes fines pour la fabrication du papier.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"750\" height=\"420\" src=\"https:\/\/calcium-carbonate.epic-powder.com\/wp-content\/uploads\/2025\/06\/Ground-calcium-carbonate.webp\" alt=\"carbonate de calcium moulu\" class=\"wp-image-3270\" srcset=\"https:\/\/calcium-carbonate.epic-powder.com\/wp-content\/uploads\/2025\/06\/Ground-calcium-carbonate.webp 750w, https:\/\/calcium-carbonate.epic-powder.com\/wp-content\/uploads\/2025\/06\/Ground-calcium-carbonate-300x168.webp 300w, https:\/\/calcium-carbonate.epic-powder.com\/wp-content\/uploads\/2025\/06\/Ground-calcium-carbonate-18x10.webp 18w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Proc\u00e9d\u00e9 et \u00e9quipement de production de carbonate de calcium lourd<\/h2>\n\n\n\n<p>Prenons l&#039;exemple du carbonate de calcium lourd pour l&#039;industrie du rev\u00eatement : son processus de production comprend le nettoyage, l&#039;\u00e9limination des impuret\u00e9s, le concassage grossier, le concassage fin, le criblage, le broyage, la classification, la collecte des mat\u00e9riaux, le traitement de surface et l&#039;emballage.<\/p>\n\n\n\n<p>L&#039;\u00e9quipement utilis\u00e9 comprend des convoyeurs vibrants, des machines \u00e0 laver \u00e0 tambour, des concasseurs \u00e0 marteaux, des concasseurs \u00e0 m\u00e2choires, des cribles vibrants, des concasseurs \u00e0 percussion, des broyeurs, des syst\u00e8mes de classification, des d\u00e9poussi\u00e9reurs \u00e0 impulsions et des \u00e9quipements d&#039;emballage.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Technologie et \u00e9quipement de broyage du carbonate de calcium moulu<\/h2>\n\n\n\n<p>Actuellement, le carbonate de calcium lourd avec d97 \u2265 5 \u03bcm est principalement produit par voie s\u00e8che. Les \u00e9quipements comprennent des broyeurs Raymond modifi\u00e9s (broyeurs \u00e0 rouleaux suspendus ou broyeurs oscillants), des broyeurs \u00e0 rouleaux (broyeurs \u00e0 rouleaux presseurs\/broyeurs verticaux, broyeurs \u00e0 rouleaux annulaires) et des broyeurs \u00e0 boulets.<\/p>\n\n\n\n<p>Pour le carbonate de calcium lourd ultrafin avec d97 &lt; 5 \u03bcm, on utilise g\u00e9n\u00e9ralement des proc\u00e9d\u00e9s de production \u00e0 sec. Certains proc\u00e9d\u00e9s utilisent un broyage humide suivi d&#039;un s\u00e9chage. La production \u00e0 sec utilise principalement des broyeurs \u00e0 boulets et des classificateurs, des broyeurs \u00e0 rouleaux (avec classification interne, broyeurs verticaux\/\u00e0 rouleaux presseurs) et des broyeurs \u00e0 agitation s\u00e8che et des classificateurs.<\/p>\n\n\n\n<p>Pour les boues de carbonate de calcium ultrafines destin\u00e9es \u00e0 la fabrication du papier, dont le d97 est inf\u00e9rieur ou \u00e9gal \u00e0 5 \u03bcm, et notamment le d90 inf\u00e9rieur ou \u00e9gal \u00e0 2 \u03bcm, la production par voie humide est g\u00e9n\u00e9ralement utilis\u00e9e. Les principaux \u00e9quipements sont des broyeurs \u00e0 agitation et des broyeurs \u00e0 sable.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><a href=\"https:\/\/calcium-carbonate.epic-powder.com\/fr\/machines\/ball-mill\/\">Lignes de production de broyeurs \u00e0 boulets + classificateurs<\/a><\/h3>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"800\" height=\"419\" src=\"https:\/\/calcium-carbonate.epic-powder.com\/wp-content\/uploads\/2025\/07\/ball-mill-classifier-system-3.webp\" alt=\"syst\u00e8me de classification de broyeur \u00e0 boulets 3\" class=\"wp-image-3357\" srcset=\"https:\/\/calcium-carbonate.epic-powder.com\/wp-content\/uploads\/2025\/07\/ball-mill-classifier-system-3.webp 800w, https:\/\/calcium-carbonate.epic-powder.com\/wp-content\/uploads\/2025\/07\/ball-mill-classifier-system-3-300x157.webp 300w, https:\/\/calcium-carbonate.epic-powder.com\/wp-content\/uploads\/2025\/07\/ball-mill-classifier-system-3-768x402.webp 768w, https:\/\/calcium-carbonate.epic-powder.com\/wp-content\/uploads\/2025\/07\/ball-mill-classifier-system-3-18x9.webp 18w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>Les lignes de production avec broyeur \u00e0 boulets et classificateur permettent de produire des poudres fines et ultrafines de carbonate de calcium lourd, d&#039;un d97 = 5\u201343 \u03bcm. Elles se caract\u00e9risent par une production continue en circuit ferm\u00e9, une classification multi-\u00e9tapes, des charges circulantes importantes (300%\u2013500%) et une grande capacit\u00e9 de production par machine unique. Utilis\u00e9e depuis la fin des ann\u00e9es 1990, cette ligne de production est l&#039;une des principales technologies pour la production \u00e0 grande \u00e9chelle de carbonate de calcium lourd ultrafin.                                                                                                         <\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><a href=\"https:\/\/calcium-carbonate.epic-powder.com\/fr\/machines\/roller-mill\/\">Broyeurs \u00e0 anneaux<\/a><\/h3>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"800\" height=\"419\" src=\"https:\/\/calcium-carbonate.epic-powder.com\/wp-content\/uploads\/2025\/07\/ring-roller-mill.webp\" alt=\"broyeur \u00e0 rouleaux annulaires\" class=\"wp-image-3418\" srcset=\"https:\/\/calcium-carbonate.epic-powder.com\/wp-content\/uploads\/2025\/07\/ring-roller-mill.webp 800w, https:\/\/calcium-carbonate.epic-powder.com\/wp-content\/uploads\/2025\/07\/ring-roller-mill-300x157.webp 300w, https:\/\/calcium-carbonate.epic-powder.com\/wp-content\/uploads\/2025\/07\/ring-roller-mill-768x402.webp 768w, https:\/\/calcium-carbonate.epic-powder.com\/wp-content\/uploads\/2025\/07\/ring-roller-mill-18x9.webp 18w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>Les broyeurs \u00e0 anneaux sont largement utilis\u00e9s en Chine depuis une dizaine d&#039;ann\u00e9es pour le broyage fin et ultrafin du carbonate de calcium broy\u00e9. Ils pr\u00e9sentent l&#039;avantage d&#039;un taux de broyage \u00e9lev\u00e9 et d&#039;une faible consommation d&#039;\u00e9nergie par unit\u00e9 de produit. Les classificateurs fins internes ou externes permettent de produire des produits ultrafins avec un d97 \u2264 10 \u03bcm. La finesse du produit peut \u00eatre ajust\u00e9e entre d97 = 5 et 40 \u03bcm, la plage optimale \u00e9tant de d97 = 10 \u00e0 30 \u03bcm.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">broyeurs \u00e0 cylindres<\/h3>\n\n\n\n<p>Les broyeurs \u00e0 cylindres (broyeurs verticaux\/laminoirs) sont l&#039;un des principaux \u00e9quipements \u00e0 grande \u00e9chelle pour le broyage fin et ultrafin du carbonate de calcium broy\u00e9. Ils se caract\u00e9risent par un taux de broyage \u00e9lev\u00e9 et une finesse de produit optimale comprise entre d97 et 15-45 \u03bcm. L&#039;ajout de classificateurs fins externes permet d&#039;obtenir des produits ultrafins dont le d97 est inf\u00e9rieur ou \u00e9gal \u00e0 10 \u03bcm. Ces produits pr\u00e9sentent une bonne granulom\u00e9trie, une faible absorption d&#039;huile et sont particuli\u00e8rement adapt\u00e9s \u00e0 la production de charges pour mat\u00e9riaux composites en polyester insatur\u00e9 (pierre reconstitu\u00e9e). Leur consommation \u00e9nerg\u00e9tique et leur usure sont \u00e9galement relativement faibles.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Broyage ultrafin humide<\/h3>\n\n\n\n<p>Le broyage ultrafin humide est principalement utilis\u00e9 pour la production de produits papetiers (bouillies) dont le d90 est inf\u00e9rieur ou \u00e9gal \u00e0 2 \u03bcm et le d97 est inf\u00e9rieur ou \u00e9gal \u00e0 2 \u03bcm, ainsi que de carbonate de calcium broy\u00e9 ultrafin dont le d60 est inf\u00e9rieur ou \u00e9gal \u00e0 2 \u03bcm (s\u00e9ch\u00e9 et utilis\u00e9 comme charge plastique). Un proc\u00e9d\u00e9 de broyage ultrafin continu en une ou deux \u00e9tapes est g\u00e9n\u00e9ralement utilis\u00e9. L&#039;\u00e9quipement principal est constitu\u00e9 de broyeurs humides agit\u00e9s ou de broyeurs \u00e0 sable, ainsi que de r\u00e9servoirs de stockage et de pompes correspondants.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Carbonate de calcium moulu <a href=\"https:\/\/calcium-carbonate.epic-powder.com\/fr\/surface-modification\/\">Modification des surfaces<\/a> Technologie et \u00e9quipement<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"523\" src=\"https:\/\/calcium-carbonate.epic-powder.com\/wp-content\/uploads\/2025\/07\/powder-coating-machine.webp\" alt=\"machine de rev\u00eatement en poudre\" class=\"wp-image-3405\" srcset=\"https:\/\/calcium-carbonate.epic-powder.com\/wp-content\/uploads\/2025\/07\/powder-coating-machine.webp 800w, https:\/\/calcium-carbonate.epic-powder.com\/wp-content\/uploads\/2025\/07\/powder-coating-machine-300x196.webp 300w, https:\/\/calcium-carbonate.epic-powder.com\/wp-content\/uploads\/2025\/07\/powder-coating-machine-768x502.webp 768w, https:\/\/calcium-carbonate.epic-powder.com\/wp-content\/uploads\/2025\/07\/powder-coating-machine-18x12.webp 18w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>La modification de surface du carbonate de calcium lourd utilise principalement des m\u00e9thodes de rev\u00eatement organique et de modification composite.<\/p>\n\n\n\n<p>La modification des rev\u00eatements organiques utilise des mat\u00e9riaux organiques, notamment l&#039;acide st\u00e9arique et ses sels, les agents de couplage \u00e0 base d&#039;esters d&#039;aluminium et de titane, ainsi que les polym\u00e8res hydrosolubles. Ces mat\u00e9riaux agissent comme agents de rev\u00eatement ou de modification de surface. Ils enrobent la poudre lourde de carbonate de calcium \u00e0 modifier.<\/p>\n\n\n\n<p>La modification des composites fait appel \u00e0 des m\u00e9thodes physiques ou chimiques. Ces m\u00e9thodes consistent \u00e0 m\u00e9langer ou \u00e0 enrober uniform\u00e9ment une autre poudre inorganique. Cette poudre est ensuite appliqu\u00e9e \u00e0 la surface de particules de carbonate de calcium lourd ou ultrafines.<\/p>\n\n\n\n<p>Actuellement, la modification par voie s\u00e8che est le proc\u00e9d\u00e9 le plus courant pour le carbonate de calcium lourd, sauf lors du broyage ultrafin par voie humide. La modification par voie humide est rarement utilis\u00e9e.<\/p>\n\n\n\n<p>Les \u00e9quipements courants de modification de surface pour le carbonate de calcium broy\u00e9 comprennent les machines de modification de surface en continu de poudre de type SLG, les machines de modification de couplage \u00e0 haut rendement HEM, les m\u00e9langeurs chauffants \u00e0 grande vitesse, les broyeurs vortex et les broyeurs \u00e0 broches. Une modification de surface du carbonate de calcium lourd est r\u00e9alis\u00e9e parall\u00e8lement au broyage fin ou ultrafin. Des agents de modification de surface sont ajout\u00e9s pendant le broyage fin ou ultrafin. Cette op\u00e9ration est r\u00e9alis\u00e9e avec le m\u00eame \u00e9quipement.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Tendance de d\u00e9veloppement de la technologie de traitement fin du carbonate de calcium broy\u00e9<\/h2>\n\n\n\n<p>Actuellement, le march\u00e9 int\u00e9rieur de la production de calcium lourd ordinaire est satur\u00e9, le prix du produit est bas et le contenu technologique et la valeur ajout\u00e9e limit\u00e9s. Cependant, la capacit\u00e9 nationale de production de calcium lourd ultrafin et activ\u00e9 reste insuffisante. Le potentiel de march\u00e9 est consid\u00e9rable.<\/p>\n\n\n\n<p>Globalement, les principales tendances de d\u00e9veloppement de l&#039;industrie du carbonate de calcium lourd sont la production \u00e0 grande \u00e9chelle, la fonctionnalisation et l&#039;automatisation. Il s&#039;agit d&#039;une exigence incontournable pour l&#039;int\u00e9gration industrielle, la stabilisation, l&#039;optimisation structurelle ou la sp\u00e9cialisation. L&#039;objectif est \u00e9galement d&#039;am\u00e9liorer l&#039;efficacit\u00e9 de la production, de r\u00e9duire la consommation d&#039;\u00e9nergie et les co\u00fbts de production, et de r\u00e9pondre \u00e0 la demande croissante du march\u00e9.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><a href=\"https:\/\/calcium-carbonate.epic-powder.com\/fr\/contact\/\">Poudre \u00e9pique<\/a><\/h2>\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=\"Syst\u00e8me de production de carbonate de calcium par broyeur \u00e0 boulets et classificateur, avec modification de la surface de la poudre\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/o-M2Wkju9sY?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<p>Epic Powder est sp\u00e9cialis\u00e9 dans la fourniture d&#039;\u00e9quipements de broyage et de modification de surface de pointe pour la production de carbonate de calcium lourd. Notre technologie de pointe garantit une efficacit\u00e9 et une pr\u00e9cision \u00e9lev\u00e9es, offrant des solutions sur mesure pour les poudres fines et ultrafines. Qu&#039;il s&#039;agisse d&#039;applications standard ou de besoins sp\u00e9cifiques, nos \u00e9quipements garantissent une qualit\u00e9 de produit constante et des performances optimales, permettant \u00e0 nos clients de r\u00e9pondre \u00e0 la demande croissante de carbonate de calcium de haute qualit\u00e9 dans divers secteurs.<\/p>\n\n\n\n<div class=\"wp-block-contact-form-7-contact-form-selector\">\n<div class=\"wpcf7 no-js\" id=\"wpcf7-f16-o1\" lang=\"zh-CN\" dir=\"ltr\" data-wpcf7-id=\"16\">\n<div class=\"screen-reader-response\"><p role=\"status\" aria-live=\"polite\" aria-atomic=\"true\"><\/p> <ul><\/ul><\/div>\n<form action=\"\/fr\/wp-json\/wp\/v2\/posts\/3417#wpcf7-f16-o1\" method=\"post\" class=\"wpcf7-form init\" aria-label=\"\u7559\u8a00\u8868\u5355\" novalidate=\"novalidate\" data-status=\"init\" data-trp-original-action=\"\/fr\/wp-json\/wp\/v2\/posts\/3417#wpcf7-f16-o1\">\n<fieldset class=\"hidden-fields-container\"><input type=\"hidden\" name=\"_wpcf7\" value=\"16\" \/><input type=\"hidden\" name=\"_wpcf7_version\" value=\"6.1.3\" \/><input type=\"hidden\" name=\"_wpcf7_locale\" value=\"zh_CN\" \/><input type=\"hidden\" name=\"_wpcf7_unit_tag\" value=\"wpcf7-f16-o1\" \/><input type=\"hidden\" name=\"_wpcf7_container_post\" value=\"0\" \/><input type=\"hidden\" name=\"_wpcf7_posted_data_hash\" value=\"\" \/>\n<\/fieldset>\n<div class=\"keen-form\">\n\t<div class=\"one-half\">\n\t\t<p><span class=\"wpcf7-form-control-wrap\" data-name=\"your-name\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text wpcf7-validates-as-required\" aria-required=\"true\" aria-invalid=\"false\" placeholder=\"Votre nom*\" value=\"\" type=\"text\" name=\"your-name\" \/><\/span>\n\t\t<\/p>\n\t<\/div>\n\t<div class=\"one-half last\">\n\t\t<p><span class=\"wpcf7-form-control-wrap\" data-name=\"your-email\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-email wpcf7-validates-as-required wpcf7-text wpcf7-validates-as-email\" aria-required=\"true\" aria-invalid=\"false\" placeholder=\"Votre email*\" value=\"\" type=\"email\" name=\"your-email\" \/><\/span>\n\t\t<\/p>\n\t<\/div>\n\t<div class=\"one-half\">\n\t\t<p><span class=\"wpcf7-form-control-wrap\" data-name=\"pnone\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-tel wpcf7-validates-as-required wpcf7-text wpcf7-validates-as-tel\" aria-required=\"true\" aria-invalid=\"false\" placeholder=\"Votre Pnone ou Whatsapp*\" value=\"\" type=\"tel\" name=\"pnone\" \/><\/span>\n\t\t<\/p>\n\t<\/div>\n\t<div class=\"one-half last\">\n\t\t<p><span class=\"wpcf7-form-control-wrap\" data-name=\"your-subject\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text\" aria-invalid=\"false\" placeholder=\"Votre entreprise\" value=\"\" type=\"text\" name=\"your-subject\" \/><\/span>\n\t\t<\/p>\n\t<\/div>\n\t<div>\n\t\t<p><span class=\"wpcf7-form-control-wrap\" data-name=\"your-message\"><textarea cols=\"40\" rows=\"3\" maxlength=\"2000\" class=\"wpcf7-form-control wpcf7-textarea\" aria-invalid=\"false\" placeholder=\"Votre message\" name=\"your-message\"><\/textarea><\/span>\n\t\t<\/p>\n\t<\/div>\n\t<div>\n\t\t<p><input class=\"wpcf7-form-control wpcf7-submit has-spinner\" type=\"submit\" value=\"Soumettre\" \/>\n\t\t<\/p>\n\t<\/div>\n<\/div>\n<style>\n.keen-form div{margin-bottom:5px;}\n.keen-form div p{margin-bottom:0px !important;}\n.one-half,.one-third {\n position: relative;\n margin-right: 4%;\n float: left;\n z-index: 99;\n}\n.one-half { width: 40%; }\n.one-third { width: 30.66%; }\n.last {\n margin-right: 0 !important;\n clear: right;\nwidth: 40%;\n}\n@media only screen and (max-width: 767px) {\n .one-half, .one-third {\n width: 90%;\n margin-right: 0;\n }\n}\n<\/style><div class=\"wpcf7-response-output\" aria-hidden=\"true\"><\/div>\n<input type=\"hidden\" name=\"trp-form-language\" value=\"fr\"\/><\/form>\n<\/div>\n<\/div>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Le carbonate de calcium broy\u00e9 est une poudre obtenue par concassage m\u00e9canique \u00e0 partir de minerais tels que la calcite, la craie et le marbre. Il se d\u00e9cline dans une large gamme de mati\u00e8res premi\u00e8res, pr\u00e9sente une blancheur \u00e9lev\u00e9e, une faible absorption d&#039;huile, une bonne applicabilit\u00e9 et un faible co\u00fbt. C&#039;est l&#039;une des poudres min\u00e9rales inorganiques non m\u00e9talliques les plus utilis\u00e9es et produites. Actuellement, [\u2026]<\/p>","protected":false},"author":1,"featured_media":3419,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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