{"id":23221,"date":"2025-01-08T14:27:27","date_gmt":"2025-01-08T06:27:27","guid":{"rendered":"https:\/\/www.jxscmachine.com\/?post_type=new&#038;p=23221"},"modified":"2025-01-08T14:27:27","modified_gmt":"2025-01-08T06:27:27","slug":"analise-de-profundidade-do-minerio-de-cromio","status":"publish","type":"new","link":"https:\/\/www.jxscmachine.com\/pt\/new\/depth-analysis-chrome-ore\/","title":{"rendered":"An\u00e1lise aprofundada do min\u00e9rio de cromo"},"content":{"rendered":"<h2>Vis\u00e3o geral<\/h2>\n<p><strong>Cromado<\/strong> O principal componente do min\u00e9rio \u00e9 <strong>cromite<\/strong>, um mineral \u00f3xido que cont\u00e9m cr\u00f3mio e <a href=\"https:\/\/www.jxscmachine.com\/pt\/solucoes\/processamento-de-ferro\/\">ferro<\/a> com um brilho negro e elevada dureza. A f\u00f3rmula molecular do cr\u00f3mio \u00e9 FeCr2O4 (Cr2O3 68%, FeO 32%). A fundi\u00e7\u00e3o deve conhecer a rela\u00e7\u00e3o ferro-cr\u00f3mio de Cr2O3\/FeO (a taxa \u00e9 de 4,7, fracamente magn\u00e9tica, eletricamente condutora, semelhante ao volfr\u00e2mio, usa 12.000 gauss para separar).<\/p>\n<p>&nbsp;<\/p>\n<h3>Utiliza\u00e7\u00e3o<\/h3>\n<p>O min\u00e9rio de cr\u00f3mio \u00e9 utilizado para fabricar a\u00e7o inoxid\u00e1vel e outras ligas met\u00e1licas. Tem uma vasta gama de utiliza\u00e7\u00f5es, <strong>incluindo principalmente materiais refract\u00e1rios<\/strong>(ponto de fus\u00e3o de 1900 graus), <strong>ind\u00fastria metal\u00fargica e qu\u00edmica, etc,<\/strong><\/p>\n<ul>\n<li><strong>Ind\u00fastria metal\u00fargica:<\/strong> O min\u00e9rio de cr\u00f3mio \u00e9 utilizado principalmente na ind\u00fastria metal\u00fargica para produzir ligas de ferrocr\u00f3mio e cr\u00f3mio met\u00e1lico. Estas ligas s\u00e3o utilizadas como aditivos ao a\u00e7o para produzir uma vasta gama de a\u00e7os especiais de elevada resist\u00eancia, resistentes \u00e0 corros\u00e3o, ao desgaste, a altas temperaturas e \u00e0 oxida\u00e7\u00e3o, tais como o a\u00e7o inoxid\u00e1vel, o a\u00e7o resistente aos \u00e1cidos, o a\u00e7o resistente ao calor, o a\u00e7o para rolamentos de esferas, o a\u00e7o para molas e o a\u00e7o para ferramentas. Estes a\u00e7os e ligas especiais desempenham um papel indispens\u00e1vel nas ind\u00fastrias da avia\u00e7\u00e3o, aeroespacial, autom\u00f3vel, constru\u00e7\u00e3o naval e defesa, por exemplo, na produ\u00e7\u00e3o de armas, m\u00edsseis, foguetes e navios.<\/li>\n<li><strong>Refract\u00e1rios:<\/strong> A cromite \u00e9 utilizada no fabrico de refract\u00e1rios especiais, como os tijolos de cr\u00f3mio e os tijolos de cr\u00f3mio-magn\u00e9sio. Estes materiais t\u00eam uma excelente estabilidade e resist\u00eancia \u00e0 corros\u00e3o a altas temperaturas e s\u00e3o amplamente utilizados nas ind\u00fastrias metal\u00fargica, do vidro e do cimento.<\/li>\n<li><span style=\"box-sizing: border-box; margin: 0px; padding: 0px;\"><strong>Ind\u00fastria qu\u00edmica:<\/strong>&nbsp;O min\u00e9rio de cr\u00f3mio \u00e9 utilizado principalmente na ind\u00fastria qu\u00edmica para produzir dicromato de s\u00f3dio, que por sua vez \u00e9 utilizado para fabricar outros compostos de cr\u00f3mio para pigmentos, t\u00eaxteis, galvanoplastia, curtumes e outras ind\u00fastrias, bem como catalisadores.<\/span><\/li>\n<li><span style=\"box-sizing: border-box; margin: 0px; padding: 0px;\"><strong>Outras utiliza\u00e7\u00f5es:<\/strong>&nbsp;O min\u00e9rio de cr\u00f3mio pode tamb\u00e9m ser utilizado para refinar o cr\u00f3mio met\u00e1lico, produzir outras ligas e fabricar dicromato. As suas propriedades f\u00edsico-qu\u00edmicas \u00fanicas, como a excelente resist\u00eancia \u00e0 corros\u00e3o, a resist\u00eancia a altas temperaturas e a elevada resist\u00eancia, tornam o min\u00e9rio de cr\u00f3mio \u00fatil em muitos dom\u00ednios.<\/span><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<table style=\"border-collapse: collapse; width: 100%;\" border=\"0\">\n<tbody>\n<tr>\n<td style=\"width: 50%;\">\n<h3>Reservas<\/h3>\n<p>Existem 5 mil milh\u00f5es de toneladas de cr\u00f3mio no mundo, concentradas principalmente na \u00c1frica do Sul e no Zimbabu\u00e9 (dois pa\u00edses que representam 90%), na Uni\u00e3o Sovi\u00e9tica, na China (Xinjiang, Tibete, Hebei, Mong\u00f3lia Interior, reservas totais de 10 milh\u00f5es de toneladas, 85% a importar)<\/p>\n<p>&nbsp;<\/p>\n<h3>Carater\u00edsticas<\/h3>\n<p>O tamanho da part\u00edcula de dissocia\u00e7\u00e3o do mon\u00f3mero \u00e9 relativamente grande, &gt;0,5mm ou cerca de 1mm, o <strong>separa\u00e7\u00e3o por gravidade beneficia\u00e7\u00e3o<\/strong> efeito \u00e9 bom.<\/td>\n<td style=\"width: 50%;\"><a href=\"https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2025\/01\/chrome.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-23223\" src=\"https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2025\/01\/chrome.jpg\" alt=\"cromo\" width=\"500\" height=\"351\" srcset=\"https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2025\/01\/chrome.jpg 756w, https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2025\/01\/chrome-18x12.jpg 18w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a>&nbsp;<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>&nbsp;<\/h3>\n<h3>Tipos de min\u00e9rio de cromo<\/h3>\n<ol>\n<li><b><\/b><strong><b>De acordo com a composi\u00e7\u00e3o qu\u00edmica do min\u00e9rio de cr\u00f3mio, este divide-se em:<\/b><\/strong><\/li>\n<\/ol>\n<ul>\n<li>Min\u00e9rio de ferro com elevado teor de cr\u00f3mio, contendo Cr2O3&gt;46%, Cr\/Fe&gt;2.<\/li>\n<li>Min\u00e9rio de cromite com elevado teor de ferro, contendo Cr2O340%\uff5e46%, Cr\/Fe&gt;1,5\uff5e<\/li>\n<li>Min\u00e9rio de cromite com elevado teor de alum\u00ednio, Al2O3&gt;20%, Cr2O3+Al2O3&gt;60%.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ol start=\"2\">\n<li><b><\/b><strong><b>De acordo com o <\/b><\/strong><strong><b>A utiliza\u00e7\u00e3o industrial do min\u00e9rio de cr\u00f3mio divide-se em:<\/b><\/strong><\/li>\n<\/ol>\n<ul>\n<li>Grau metal\u00fargico<\/li>\n<li>Grau refrat\u00e1rio<\/li>\n<li>Grau qu\u00edmico<\/li>\n<li>Grau de pedra fundida<\/li>\n<\/ul>\n<table border=\"1\" width=\"100%\">\n<tbody>\n<tr>\n<td style=\"text-align: center;\"><strong><b>I<\/b><\/strong><strong><b>ndustrial <\/b><\/strong><strong><b>U<\/b><\/strong><strong><b>ses<\/b><\/strong><\/td>\n<td style=\"text-align: center;\"><strong><b>Grau de concentra\u00e7\u00e3o de cromo<\/b><\/strong><\/td>\n<td style=\"text-align: center;\"><strong><b>Cr2O3\/FeO<\/b><\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">Metalurgia<\/td>\n<td style=\"text-align: center;\">&gt;45%<\/td>\n<td style=\"text-align: center;\">&gt;3<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">Min\u00e9rio granulado para metalurgia<\/td>\n<td style=\"text-align: center;\">&gt;38-40%<\/td>\n<td style=\"text-align: center;\">&gt;2.4<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">Materiais refract\u00e1rios<\/td>\n<td style=\"text-align: center;\">&gt;32%<\/td>\n<td style=\"text-align: center;\">\/<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<ol start=\"3\">\n<li><b><\/b><strong><b>De acordo com o <\/b><\/strong><strong><b>Valor mineiro(<\/b><\/strong><strong><b>Grau de Cr2O3 do min\u00e9rio de cr\u00f3mio<\/b><\/strong><strong><b>)<\/b><\/strong><strong><b>:<\/b><\/strong><\/li>\n<\/ol>\n<ul>\n<li>Min\u00e9rio rico em cr\u00f3mio &gt;32%<\/li>\n<li>Min\u00e9rio de cr\u00f3mio empobrecido 12-30%<\/li>\n<li>Min\u00e9rio de cr\u00f3mio aluvial &gt;3% (pode atingir 42-48% ap\u00f3s transforma\u00e7\u00e3o)<\/li>\n<li>Areia de praia &gt;10% (pode atingir 49-50% ap\u00f3s o processamento, utilizar\u00e1 a eletr\u00f3lise).<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h2>Tratamento de min\u00e9rio de cromo<\/h2>\n<h3>Tamanho das part\u00edculas<\/h3>\n<ul>\n<li>Trama grosseira: dissocia\u00e7\u00e3o de 5 mm, classifica\u00e7\u00e3o do tamanho das part\u00edculas. Pode utilizar um <a href=\"https:\/\/www.jxscmachine.com\/pt\/separador-de-gravidade\/concentrador-de-jigueiras\/\">separador de jigueiras<\/a>, retifica\u00e7\u00e3o de rejeitos e re-sele\u00e7\u00e3o de calha espiral + mesa vibrat\u00f3ria.<\/li>\n<li>Part\u00edculas grossas: 2-5mm. Pode utilizar um separador de jigueiras, retifica\u00e7\u00e3o de rejeitos, <a href=\"https:\/\/www.jxscmachine.com\/pt\/separador-de-gravidade\/calha-em-espiral\/\">calha em espiral<\/a> + re-sele\u00e7\u00e3o da mesa de agita\u00e7\u00e3o.<\/li>\n<li>M\u00e9dia fina: 0,5-2mm. Pode usar um separador de jigue, retifica\u00e7\u00e3o de rejeitos, calha espiral + <a href=\"https:\/\/www.jxscmachine.com\/pt\/separador-de-gravidade\/mesa-vibratoria-de-ouro\/\">mesa de agita\u00e7\u00e3o<\/a> re-sele\u00e7\u00e3o.<\/li>\n<li>Part\u00edculas finas: &lt;0,5mm (baixa taxa de recupera\u00e7\u00e3o). Pode usar a calha espiral, a mesa de agita\u00e7\u00e3o e a separa\u00e7\u00e3o magn\u00e9tica para separar.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Min\u00e9rio bruto de cromo carbonatado - Separa\u00e7\u00e3o magn\u00e9tica<\/h3>\n<p>O min\u00e9rio de cr\u00f3mio \u00e9 fracamente magn\u00e9tico, mas os seus minerais de ferro (como a magnetite, a hematite, etc.) tendem a ser fortemente magn\u00e9ticos. O m\u00e9todo de separa\u00e7\u00e3o magn\u00e9tica \u00e9 utilizado atrav\u00e9s da a\u00e7\u00e3o do campo magn\u00e9tico. Estes minerais de impureza que cont\u00eam ferro dos minerais de cr\u00f3mio, equipamento normalmente utilizado, t\u00eam um <a href=\"https:\/\/www.jxscmachine.com\/pt\/separador-magnetico\/separador-magnetico-de-alta-intensidade\/\">separador magn\u00e9tico de alta intensidade<\/a>. O min\u00e9rio bruto carbonatado diretamente na separa\u00e7\u00e3o magn\u00e9tica, com separador magn\u00e9tico de alto gradiente, 26% do min\u00e9rio bruto ap\u00f3s a separa\u00e7\u00e3o magn\u00e9tica pode atingir 42-48%, o tamanho de moagem 0-200 mesh representou 50%.<\/p>\n<ul>\n<li><strong>Separa\u00e7\u00e3o magn\u00e9tica a seco:<\/strong> utilizado para o processamento de min\u00e9rios com grandes dimens\u00f5es de part\u00edculas e baixa humidade.<\/li>\n<li><strong>Separa\u00e7\u00e3o magn\u00e9tica por via h\u00famida:<\/strong> utilizado para o processamento de min\u00e9rio h\u00famido, especialmente para min\u00e9rio com part\u00edculas mais pequenas.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>80% Tamanho do concentrado de cromo &lt;0,1 mm - Flota\u00e7\u00e3o<\/h3>\n<p>O tamanho do concentrado 80% \u00e9 inferior a 0,1 mm, utiliza-se a flota\u00e7\u00e3o para separar o cr\u00f3mio, e 19% pode ser selecionado para 48% por flota\u00e7\u00e3o.<\/p>\n<p>O m\u00e9todo de flota\u00e7\u00e3o separa os minerais de cr\u00f3mio de outros minerais atrav\u00e9s da adi\u00e7\u00e3o de produtos qu\u00edmicos de flota\u00e7\u00e3o (por exemplo, agentes de captura, espumantes, etc.) e utilizando a diferen\u00e7a entre a hidrofilicidade e a hidrofobicidade das superf\u00edcies dos minerais de cr\u00f3mio e dos minerais de impureza. O m\u00e9todo de flota\u00e7\u00e3o \u00e9 adequado para min\u00e9rios de cr\u00f3mio que contenham mais sil\u00edcio, alum\u00ednio e outras impurezas.<\/p>\n<p>O m\u00e9todo de flota\u00e7\u00e3o \u00e9 geralmente aplicado ao tratamento de min\u00e9rios de cromo de gr\u00e3o fino, especialmente quando os min\u00e9rios de cromo cont\u00eam grandes quantidades de quartzo ou outros minerais dif\u00edceis de separar.<\/p>\n<p>&nbsp;<\/p>\n<h3>Min\u00e9rio de cromo later\u00edtico<\/h3>\n<p>30% n\u00edquel, 40-50% hematite, cr\u00f3mio. \u00c9 necess\u00e1rio efetuar uma an\u00e1lise granulom\u00e9trica, ap\u00f3s a lavagem, <a href=\"https:\/\/www.jxscmachine.com\/pt\/classificacao\/hidrociclone\/\">ciclone<\/a> o transbordo deixa cair part\u00edculas finas, o fluxo inferior \u00e9 concentrado de cr\u00f3mio, o tamanho do concentrado \u00e9 muito fino (cerca de 325 mesh), semelhante a <strong>classifica\u00e7\u00e3o da lavagem do caulino<\/strong>. O grau do concentrado \u00e9 de at\u00e9 30%.<\/p>\n<p>&nbsp;<\/p>\n<p><strong><b>Avalia\u00e7\u00e3o da seletividade do min\u00e9rio de cr\u00f3mio:<\/b><\/strong>&nbsp;depende principalmente do tipo de Cr, do grau do min\u00e9rio original, da pureza (teor de Cr2O3, a an\u00e1lise do espetro de energia pode testar a pureza do mineral), do tamanho das part\u00edculas e da composi\u00e7\u00e3o mineral simbi\u00f3tica.<\/p>\n<p>&nbsp;<\/p>\n<figure id=\"attachment_23222\" aria-describedby=\"caption-attachment-23222\" style=\"width: 1000px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2025\/01\/Alluvial-Chromite-Recovery-Process.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-23222\" src=\"https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2025\/01\/Alluvial-Chromite-Recovery-Process.jpg\" alt=\"Processo de recupera\u00e7\u00e3o de cromite aluvial\" width=\"1000\" height=\"470\" srcset=\"https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2025\/01\/Alluvial-Chromite-Recovery-Process.jpg 1000w, https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2025\/01\/Alluvial-Chromite-Recovery-Process-768x361.jpg 768w, https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2025\/01\/Alluvial-Chromite-Recovery-Process-18x8.jpg 18w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><figcaption id=\"caption-attachment-23222\" class=\"wp-caption-text\">Processo de recupera\u00e7\u00e3o de cromite aluvial<\/figcaption><\/figure>\n<p>&nbsp;<\/p>\n<h2>Processo de beneficiamento de min\u00e9rio de cromo<\/h2>\n<h3>Areia de praia (areia de rio)<\/h3>\n<p>Peneiramento do min\u00e9rio prim\u00e1rio, +6mm para os res\u00edduos, 0-6mm de peneiramento secund\u00e1rio de +2mm e 0-2mm. 0-2mm nas 2 sec\u00e7\u00f5es da separa\u00e7\u00e3o magn\u00e9tica interm\u00e9dia (6000-7000 gauss), para remover os minerais magn\u00e9ticos de resist\u00eancia m\u00e9dia (magnetite ilmenite), a separa\u00e7\u00e3o magn\u00e9tica dos rejeitos s\u00e3o minerais fracamente magn\u00e9ticos contendo cr\u00f3mio (concentrado). O concentrado ap\u00f3s a separa\u00e7\u00e3o magn\u00e9tica vai para a calha em espiral. Ap\u00f3s a separa\u00e7\u00e3o magn\u00e9tica e a reelei\u00e7\u00e3o da calha em espiral, o concentrado de cr\u00f3mio tem um sabor de cerca de 22%. O concentrado de cr\u00f3mio \u00e9 ent\u00e3o colocado em electrowinning de 2 fases para melhorar o sabor do cr\u00f3mio.<\/p>\n<p>&nbsp;<\/p>\n<h3>Min\u00e9rio de veio prim\u00e1rio<\/h3>\n<p>O tamanho da part\u00edcula de dissocia\u00e7\u00e3o \u00e9 melhor, esmagando e peneirando 0-3mm, e 3-10mm, respetivamente no jigger trapezoidal, e jigging concentrado para obter part\u00edculas de concentrado de cromo. Desidrata\u00e7\u00e3o de rejeitos na moagem 0-0,5 mm, no agitador de parafuso. Min\u00e9rio bruto 19.8% Ap\u00f3s sele\u00e7\u00e3o para 43%.<\/p>","protected":false},"excerpt":{"rendered":"<p>Descri\u00e7\u00e3o geral O principal componente do min\u00e9rio de cr\u00f3mio \u00e9 a cromite, um mineral \u00f3xido que cont\u00e9m cr\u00f3mio e ferro com um brilho negro e elevada dureza. A f\u00f3rmula molecular do cr\u00f3mio \u00e9 FeCr2O4 (Cr2O3 68%, FeO 32%). A fundi\u00e7\u00e3o deve conhecer a rela\u00e7\u00e3o ferro-cr\u00f3mio Cr2O3\/FeO (a taxa \u00e9 de 4,7, fracamente magn\u00e9tico, eletricamente condutor, semelhante ao volfr\u00e2mio, utilizar 12 000 gauss para separar).   Utilizar ... <a href=\"https:\/\/www.jxscmachine.com\/pt\/new\/depth-analysis-chrome-ore\/\" class=\"more-link\">Continuar a ler <span class=\"screen-reader-text\">An\u00e1lise aprofundada do min\u00e9rio de cromo<\/span><\/a><\/p>","protected":false},"author":1,"featured_media":23223,"parent":0,"menu_order":66,"comment_status":"closed","ping_status":"open","template":"","format":"standard","meta":{"_acf_changed":false,"ngg_post_thumbnail":0,"footnotes":""},"categories":[],"tags":[],"class_list":["post-23221","new","type-new","status-publish","format-standard","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>In-depth Analysis of Chrome Ore - JXSC Machine<\/title>\n<meta name=\"description\" content=\"The main component of chrome ore is chromite, is an oxide mineral containing chromium and iron with a black luster and high hardness.\" \/>\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\/novo\/analise-de-profundidade-do-minerio-de-cromio\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"In-depth Analysis of Chrome Ore - 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