Dans le cadre de la technologie de traitement existante<\/a>, les impuret\u00e9s du r\u00e9seau dans la mati\u00e8re premi\u00e8re de quartz peuvent difficilement \u00eatre \u00e9limin\u00e9es. Bien que la teneur en \u00e9l\u00e9ment Al sous forme d'impuret\u00e9s du r\u00e9seau soit tr\u00e8s faible, il est extr\u00eamement difficile \u00e0 \u00e9liminer, ce qui est la cl\u00e9 de la qualit\u00e9 finale du quartz de haute puret\u00e9.<\/p>\n\n\n\nDans l'ensemble du processus de purification, apr\u00e8s grillage et trempe, s\u00e9paration magn\u00e9tique, processus de lixiviation acide, les \u00e9l\u00e9ments d'impuret\u00e9s du quartz Fe, Cr, Ni, Na, K, Ca, Mg, Cu, etc. peuvent \u00eatre consid\u00e9rablement r\u00e9duits. Cependant, apr\u00e8s une s\u00e9rie de processus de purification, l'effet d'\u00e9limination de l'Al est limit\u00e9, principalement parce que Al3+ p\u00e9n\u00e8tre dans le r\u00e9seau cristallin pour remplacer Si4+, et que le rayon ionique est relativement proche de celui du quartz, qui n'est pas facile \u00e0 purifier.<\/p>\n\n\n\n
De m\u00eame, Ti4+, B3+, P3+ et autres \u00e9l\u00e9ments d'impuret\u00e9s. On peut voir que les impuret\u00e9s contenues dans le quartz naturel, en particulier la pr\u00e9sence d'impuret\u00e9s \u00e0 l'\u00e9tat homog\u00e8ne, limitent directement la production de produits \u00e0 base de quartz de haute puret\u00e9 lorsque le minerai d'origine Al, Ti, Li, B, P et autres \u00e9l\u00e9ments d'impuret\u00e9s \u00e0 haute teneur, il n'est pas facile d'obtenir du quartz de haute puret\u00e9.<\/p>\n\n\n\n
Des exemples typiques sont les quartzites de la r\u00e9gion norv\u00e9gienne qui, bien que co-associ\u00e9s \u00e0 une vari\u00e9t\u00e9 de min\u00e9raux tels que le schiste bleu, contiennent peu d'impuret\u00e9s de r\u00e9seau et contiennent peu d'inclusions fluides. On consid\u00e8re qu'ils ont le potentiel d'\u00eatre transform\u00e9s en quartz de haute puret\u00e9, et les pegmatites de la r\u00e9gion de la Sierra de Comechigones (Argentine), qui, malgr\u00e9 leur teneur \u00e9lev\u00e9e en SiO2, sont tr\u00e8s difficiles \u00e0 transformer en quartz de haute puret\u00e9 en raison de la niveau \u00e9lev\u00e9 d'impuret\u00e9s de r\u00e9seau dans le quartz \u00e0 grain plus fin.<\/p>\n\n\n\n
Les impuret\u00e9s du r\u00e9seau, le facteur le plus critique limitant la qualit\u00e9 du quartz de haute puret\u00e9<\/h2>\n\n\n\n
Les impuret\u00e9s du r\u00e9seau dans l'\u00e9nergie de la liaison (Al3+, Ti4+)-O sont plus grandes, Al, Ti au lieu de Si dans le r\u00e9seau de quartz pour former un nouveau [AlO4], [TiO4], est le plus difficile \u00e0 \u00e9liminer des \u00e9l\u00e9ments d'impuret\u00e9s du r\u00e9seau de quartz .<\/p>\n\n\n\n
Les impuret\u00e9s de la structure en treillis constituent le goulot d'\u00e9tranglement ultime dans le traitement des produits \u00e0 base de quartz de haute puret\u00e9, difficiles \u00e0 franchir. Pour s\u00e9lectionner les bonnes mati\u00e8res premi\u00e8res de quartz de haute puret\u00e9 et d\u00e9velopper le meilleur programme de purification du quartz, il est n\u00e9cessaire de clarifier l\u2019\u00e9tat des impuret\u00e9s dans le quartz.<\/p>\n\n\n\n
L'\u00e9tude actuelle des \u00e9l\u00e9ments d'impuret\u00e9s en l'\u00e9tat des principales m\u00e9thodes :<\/h3>\n\n\n\n
(1) Analyse de raffinement de l\u2019ajustement des donn\u00e9es de diffraction des rayons X\u00a0;
(2) analyse d\u2019images par balayage de surface LA-ICP-MS\u00a0;
(3) Analyse par spectroscopie d'absorption infrarouge\u00a0;
(4) Sonde \u00e9lectronique et analyse du spectre \u00e9nerg\u00e9tique\u00a0;
(5) Caract\u00e9risation par cathodoluminescence.<\/p>\n\n\n\n
\u00c0 l\u2019heure actuelle, le processus de torr\u00e9faction au chlore constitue un moyen plus efficace d\u2019\u00e9liminer les impuret\u00e9s du r\u00e9seau cristallin du quartz. Le grillage par chloration est inf\u00e9rieur \u00e0 la temp\u00e9rature de fusion du quartz, et les composants d'impuret\u00e9s du quartz et les agents chlor\u00e9s jouent un r\u00f4le dans le chlorure et le quartz volatil dans le processus de grillage par chloration \u00e0 haute temp\u00e9rature. Il y a une transition cristalline de sorte que les ions m\u00e9talliques du r\u00e9seau de quartz, tels que Al3+, Ti4+, etc., peuvent migrer et diffuser vers la surface du quartz. Hcl, NH4Cl et Cl2, etc., pour devenir des composants volatils pour r\u00e9aliser la s\u00e9paration du quartz, mais \u00e9galement pour emp\u00eacher les \u00e9l\u00e9ments d'impuret\u00e9s de migrer et de diffuser vers le processus de refroidissement du r\u00e9seau de quartz, et ensuite pour obtenir une m\u00e9thode plus efficace d'\u00e9limination des impuret\u00e9s. . La s\u00e9paration du quartz emp\u00eache \u00e9galement les \u00e9l\u00e9ments d'impuret\u00e9s dans le processus de refroidissement, puis migrent et se diffusent dans le r\u00e9seau de quartz.<\/p>","protected":false},"excerpt":{"rendered":"
Lors de la formation des cristaux de quartz, certains \u00e9l\u00e9ments vont remplacer le silicium. Cela forme les impuret\u00e9s structurelles du quartz. La teneur de ces impuret\u00e9s est tr\u00e8s faible. C'est difficile de [\u2026]<\/p>","protected":false},"author":1,"featured_media":15753,"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":"","ast-disable-related-posts":"","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":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[42],"tags":[],"class_list":["post-15751","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry-news"],"yoast_head":"\n
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