{"id":7306,"date":"2019-08-26T09:14:01","date_gmt":"2019-08-26T01:14:01","guid":{"rendered":"https:\/\/www.jxscmachine.com\/?post_type=solutions&p=7306"},"modified":"2020-01-03T13:47:31","modified_gmt":"2020-01-03T05:47:31","slug":"processamento-de-terras-raras","status":"publish","type":"solutions","link":"https:\/\/www.jxscmachine.com\/pt\/solutions\/rare-earths-processing\/","title":{"rendered":"Terras Raras"},"content":{"rendered":"
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\"Terras<\/div>\n\t\t<\/figure>\n\t<\/div>\n
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Descri\u00e7\u00e3o<\/h2><\/div><\/div>\n\t
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Existem mais de 200 tipos de minerais que cont\u00eam elementos de terras raras e seus compostos. Entre eles, os minerais industriais com valor de aplica\u00e7\u00e3o s\u00e3o principalmente a bastnaesite e a monazite, seguidos do min\u00e9rio de terras raras adsorvido por i\u00f5es, da gadolinite, da loparite, da thortveitite, etc.
\nDe acordo com as estat\u00edsticas divulgadas pelo US Bureau of Mines em 1985, as reservas mundiais de recursos de terras raras totalizavam 45 milh\u00f5es de toneladas (REO). Entre elas, a China tem 36 milh\u00f5es de toneladas, representando 80% das reservas mundiais totais; os Estados Unidos t\u00eam 4,9 milh\u00f5es de toneladas, representando 11%; a \u00cdndia, 2,22 milh\u00f5es de toneladas, representando 5%; a antiga Uni\u00e3o Sovi\u00e9tica, 450 000 toneladas, representando 1%. As reservas destes quatro pa\u00edses representam 97% do total das reservas mundiais. As restantes est\u00e3o distribu\u00eddas principalmente por 14 pa\u00edses da \u00c1sia, \u00c1frica, Europa, Am\u00e9rica do Sul e Oce\u00e2nia.<\/p>\n

Pode interessar-lhe Principais reservas de minerais de terras raras por pa\u00eds 2019<\/a>
\nMais pormenores em O que s\u00e3o minerais de terras raras - Para que s\u00e3o utilizadas as terras raras?<\/a><\/p>\n\n\t\t<\/div>\n\t<\/div>\n

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M\u00e9todos de extra\u00e7\u00e3o de minerais de terras raras<\/h2><\/div><\/div>\n\t
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Separa\u00e7\u00e3o por gravidade<\/strong>
\nO processo de separa\u00e7\u00e3o por gravidade do min\u00e9rio de terras raras baseia-se na diferen\u00e7a de densidade entre os minerais de terras raras e os minerais de ganga. O seu principal objetivo \u00e9 a separa\u00e7\u00e3o de minerais de terras raras e minerais de ganga, como o quartzo e a calcite, de baixa densidade. Por exemplo, o min\u00e9rio de areia da praia utiliza maioritariamente o m\u00e9todo de separa\u00e7\u00e3o por gravidade, ou a beneficia\u00e7\u00e3o do min\u00e9rio de veios de terras raras tamb\u00e9m utiliza a separa\u00e7\u00e3o por gravidade como pr\u00e9-enriquecimento.<\/p>\n

Flota\u00e7\u00e3o<\/strong>
\nO processo de flota\u00e7\u00e3o de min\u00e9rio de terras raras \u00e9 um dos principais m\u00e9todos de beneficia\u00e7\u00e3o de min\u00e9rio de terras raras. Utiliza a diferen\u00e7a nas propriedades f\u00edsicas e qu\u00edmicas da superf\u00edcie dos minerais de terras raras e dos minerais associados para os separar da ganga associada e de outros minerais para obter concentrados de terras raras eficazes. Por exemplo, na mina de Baotou, a densidade e as propriedades magn\u00e9ticas do min\u00e9rio de fluorocarbono e da monazite s\u00e3o basicamente as mesmas, pelo que \u00e9 utilizado um processo de flota\u00e7\u00e3o. Al\u00e9m disso, ap\u00f3s a separa\u00e7\u00e3o por gravidade do min\u00e9rio de areia da costa, o m\u00e9todo de flota\u00e7\u00e3o \u00e9 frequentemente utilizado para obter concentrado de terras raras a partir de areia pesada.<\/p>\n

Separa\u00e7\u00e3o magn\u00e9tica<\/strong>
\nA separa\u00e7\u00e3o magn\u00e9tica do min\u00e9rio de terras raras \u00e9 um m\u00e9todo de beneficia\u00e7\u00e3o de alguns minerais de terras raras ou magnetite associada com magnetismo fraco. S\u00e3o utilizados diferentes coeficientes de suscetibilidade magn\u00e9tica do min\u00e9rio de terras raras e da ganga associada e de outros minerais, e s\u00e3o utilizados separadores magn\u00e9ticos com diferentes intensidades de campo magn\u00e9tico para a separa\u00e7\u00e3o. Por exemplo, no min\u00e9rio de areia costeira, a separa\u00e7\u00e3o magn\u00e9tica fraca \u00e9 utilizada para separar a ilmenite da monazite, ou a separa\u00e7\u00e3o magn\u00e9tica forte \u00e9 utilizada para separar a monazite do zirc\u00e3o, do quartzo e de outros minerais. Na flota\u00e7\u00e3o de min\u00e9rio de terras raras, por vezes, para simplificar o processo de flota\u00e7\u00e3o e poupar reagentes de flota\u00e7\u00e3o, \u00e9 tamb\u00e9m utilizado um processo de separa\u00e7\u00e3o magn\u00e9tica forte para efetuar o enriquecimento pr\u00e9vio do min\u00e9rio de terras raras.<\/p>\n

Beneficia\u00e7\u00e3o por radia\u00e7\u00e3o<\/strong>
\nO tratamento de min\u00e9rio de terras raras por radia\u00e7\u00e3o consiste em utilizar a m\u00e1quina de radia\u00e7\u00e3o y para selecionar o min\u00e9rio de terras raras e os minerais de ganga, utilizando os diferentes teores de rad\u00e3o no min\u00e9rio de terras raras e nas esp\u00e9cies de ganga. O m\u00e9todo geral de beneficia\u00e7\u00e3o por radia\u00e7\u00e3o \u00e9 utilizado principalmente para a pr\u00e9-sele\u00e7\u00e3o de min\u00e9rios de terras raras.<\/p>\n

Sele\u00e7\u00e3o el\u00e9ctrica<\/strong><\/p>\n

O m\u00e9todo de separa\u00e7\u00e3o el\u00e9ctrica do min\u00e9rio de terras raras deve-se principalmente ao facto de o min\u00e9rio de terras raras ser um condutor n\u00e3o condutor, pelo que pode ser utilizado para o separar do mineral altamente condutor, tirando partido da sua condutividade el\u00e9ctrica e do mineral associado. Geralmente, a separa\u00e7\u00e3o el\u00e9ctrica \u00e9 utilizada sobretudo para a sele\u00e7\u00e3o de areia pesada ap\u00f3s a re-sele\u00e7\u00e3o do min\u00e9rio de areia da costa.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

Existem mais de 200 tipos de minerais que cont\u00eam elementos de terras raras e seus compostos. Entre eles, os minerais industriais com valor de aplica\u00e7\u00e3o s\u00e3o principalmente a bastnaesite e a monazite, seguidos do min\u00e9rio de terras raras adsorvido por i\u00f5es, da gadolinite, da loparite, da thortveitite, etc.<\/p>","protected":false},"author":1,"featured_media":7348,"parent":0,"menu_order":21,"comment_status":"open","ping_status":"open","template":"","format":"standard","meta":{"_acf_changed":false,"ngg_post_thumbnail":0,"footnotes":""},"class_list":["post-7306","solutions","type-solutions","status-publish","format-standard","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"\nRare Earths Processing | Equipment, Process Flow, Cases - JXSC<\/title>\n<meta name=\"description\" content=\"Rare earths processing description from its geology mineral property to how to extract mineral from rock and placer deposit, related processing plant flow chart and layout design.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.jxscmachine.com\/pt\/solucoes\/processamento-de-terras-raras\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Rare Earths Processing | Equipment, Process Flow, Cases - 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