{"id":3715,"date":"2024-12-10T12:54:58","date_gmt":"2024-12-10T12:54:58","guid":{"rendered":"https:\/\/ampmineral.com\/operations-de-fragmentation-chez-amp\/"},"modified":"2024-12-10T12:55:04","modified_gmt":"2024-12-10T12:55:04","slug":"operations-de-fragmentation-chez-amp","status":"publish","type":"post","link":"https:\/\/ampmineral.com\/fr\/operations-de-fragmentation-chez-amp\/","title":{"rendered":"Op\u00e9rations de fragmentation chez AMP"},"content":{"rendered":"

La comminution<\/strong> est un terme technique utilis\u00e9 dans l’exploitation mini\u00e8re et la m\u00e9tallurgie pour d\u00e9signer le processus de r\u00e9duction de la taille des roches ou des min\u00e9raux<\/strong> par concassage et broyage. L’objectif principal du broyage est de lib\u00e9rer les particules min\u00e9rales pr\u00e9cieuses de la gangue (mati\u00e8re ind\u00e9sirable) afin qu’elles puissent \u00eatre trait\u00e9es et r\u00e9cup\u00e9r\u00e9es lors d’\u00e9tapes ult\u00e9rieures, telles que la concentration ou la lixiviation.<\/p>\n

Principales \u00e9tapes du broyage<\/strong><\/h3>\n

1. D\u00e9chiquetage :<\/strong><\/p>\n

    \n
  • Processus initial de r\u00e9duction de taille.<\/li>\n
  • Elle est r\u00e9alis\u00e9e dans des concasseurs (\u00e0 m\u00e2choires, rotatifs ou coniques) pour amener les grosses roches extraites du gisement \u00e0 des tailles plus maniables.<\/li>\n
  • R\u00e9duit g\u00e9n\u00e9ralement la taille des particules \u00e0 des gammes centim\u00e9triques.<\/li>\n<\/ul>\n

    2. Broyage<\/strong><\/p>\n

      \n
    • Processus plus fin qui se produit apr\u00e8s le broyage.<\/li>\n
    • Elle est r\u00e9alis\u00e9e dans des broyeurs (\u00e0 boulets, \u00e0 barres, SAG ou autog\u00e8nes), o\u00f9 les particules sont r\u00e9duites \u00e0 des tailles plus petites, g\u00e9n\u00e9ralement de l’ordre du micron.<\/li>\n
    • Il est crucial pour lib\u00e9rer du minerai pr\u00e9cieux, en particulier dans les gisements \u00e0 faible teneur.<\/li>\n<\/ul>\n

      Importance du broyage<\/strong><\/h3>\n
        \n
      • Lib\u00e9ration de min\u00e9raux:<\/strong> Permet de s\u00e9parer efficacement les min\u00e9raux pr\u00e9cieux de la gangue.<\/li>\n
      • Efficacit\u00e9 du processus:<\/strong> Une taille de particule ad\u00e9quate facilite la r\u00e9cup\u00e9ration des min\u00e9raux par flottation, s\u00e9paration magn\u00e9tique, gravim\u00e9trie, lixiviation, entre autres.<\/li>\n
      • Co\u00fbts \u00e9nerg\u00e9tiques:<\/strong> la comminution consomme entre 30 % et 50 % de l’\u00e9nergie totale d’une usine de traitement, l’optimisation de cette \u00e9tape est donc essentielle pour r\u00e9duire les co\u00fbts.<\/li>\n<\/ul>\n

        Nouvelles technologies en fragmentation<\/strong><\/h3>\n
          \n
        • Rouleaux de broyage haute pression (HPGR):<\/strong> plus \u00e9conomes en \u00e9nergie, id\u00e9aux pour les min\u00e9raux durs.<\/li>\n
        • Moulins verticaux:<\/strong> Ils n\u00e9cessitent moins d\u2019espace et d\u2019\u00e9nergie que les moulins traditionnels.<\/li>\n
        • Fragmentation s\u00e9lective:<\/strong> technologies qui brisent les particules en fonction de leurs propri\u00e9t\u00e9s min\u00e9ralogiques.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"

          La comminution est un terme technique utilis\u00e9 dans l’exploitation mini\u00e8re et la m\u00e9tallurgie pour d\u00e9signer le processus de r\u00e9duction de la taille des roches ou des min\u00e9raux par concassage et broyage. L’objectif principal du broyage est de lib\u00e9rer les particules min\u00e9rales pr\u00e9cieuses de la gangue (mati\u00e8re ind\u00e9sirable) afin qu’elles puissent \u00eatre trait\u00e9es et r\u00e9cup\u00e9r\u00e9es lors […]<\/p>\n","protected":false},"author":4,"featured_media":3711,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[36],"tags":[],"class_list":["post-3715","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-amp"],"yoast_head":"\nLa comminution dans l'exploitation mini\u00e8re\u00a0: processus, \u00e9tapes et nouvelles technologies<\/title>\n<meta name=\"description\" content=\"La comminution dans l'exploitation mini\u00e8re comprend le concassage, le broyage et des technologies innovantes pour optimiser les processus et r\u00e9duire les co\u00fbts.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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