{"id":7413,"date":"2019-08-26T14:47:49","date_gmt":"2019-08-26T06:47:49","guid":{"rendered":"https:\/\/www.jxscmachine.com\/?post_type=solutions&p=7413"},"modified":"2019-09-25T15:19:01","modified_gmt":"2019-09-25T07:19:01","slug":"processamento-de-areia-e-cascalho","status":"publish","type":"solutions","link":"https:\/\/www.jxscmachine.com\/pt\/solutions\/sand-gravel-processing\/","title":{"rendered":"Areia e cascalho"},"content":{"rendered":"
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\"areia<\/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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Os dep\u00f3sitos de areia e cascalho que se encontram nas praias ou nos rios e ribeiros s\u00e3o, na sua maioria, gr\u00e3os de quartzo (di\u00f3xido de sil\u00edcio, SiO2). A meteoriza\u00e7\u00e3o de rochas como o granito forma estes gr\u00e3os de quartzo. No processo de meteoriza\u00e7\u00e3o, os minerais mais macios e mais fracos do granito (como o feldspato) s\u00e3o desgastados. O quartzo mais resistente acaba por ser reduzido em tamanho, mas n\u00e3o se decomp\u00f5e quimicamente. Com o tempo, estes gr\u00e3os de quartzo acumulam-se nos rios, ribeiros, deltas e praias.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n

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Rela\u00e7\u00e3o com a explora\u00e7\u00e3o mineira<\/h2><\/div><\/div>\n\t
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Os m\u00e9todos de extra\u00e7\u00e3o de areia industrial dependem do tipo de dep\u00f3sito. Os dep\u00f3sitos n\u00e3o consolidados s\u00e3o extra\u00eddos com recurso a carregadores frontais, scrapers ou bulldozers. O material \u00e9 escavado, escavado e empurrado para um ponto central. O material com qualidade de min\u00e9rio \u00e9 ent\u00e3o carregado para um cami\u00e3o utilizando equipamento normal de movimenta\u00e7\u00e3o de terras, de onde segue para uma pilha de armazenamento ou para uma f\u00e1brica de processamento.<\/p>\n

Uma draga hidr\u00e1ulica utiliza um tubo de suc\u00e7\u00e3o para escavar a areia, que \u00e9 bombeada atrav\u00e9s de uma tubagem para pilhas de estacas ou diretamente para uma f\u00e1brica de processamento. O canal ou dep\u00f3sito de rejeitos \u00e9 escavado e colocado numa pilha de armazenamento. O material de qualidade do min\u00e9rio \u00e9 carregado em cami\u00f5es de transporte para ser transportado para uma f\u00e1brica de processamento.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n

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Utiliza\u00e7\u00f5es<\/h2><\/div><\/div>\n\t
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A areia e a gravilha s\u00e3o utilizadas para a constru\u00e7\u00e3o de estradas, para misturar com asfalto, como enchimento de constru\u00e7\u00f5es e na produ\u00e7\u00e3o de materiais de constru\u00e7\u00e3o como blocos de bet\u00e3o, tijolos e tubos. Tamb\u00e9m \u00e9 utilizada para fabricar telhas, usadas em estradas geladas no inverno, para balastro de caminhos-de-ferro e para filtragem de \u00e1gua.<\/p>\n

A areia e a gravilha industriais s\u00e3o utilizadas para fabricar vidro, como areia de fundi\u00e7\u00e3o e como areia abrasiva.<\/p>\n

Para algumas aplica\u00e7\u00f5es, \u00e9 o teor de s\u00edlica (quartzo) da areia que a torna t\u00e3o valiosa. A pr\u00f3pria s\u00edlica \u00e9 necess\u00e1ria para fabricar produtos como o vidro. Al\u00e9m disso, as propriedades f\u00edsicas da areia, em particular a sua propriedade abrasiva, tornam-na \u00fatil para a tra\u00e7\u00e3o em estradas e caminhos-de-ferro gelados e para a decapagem com jato de areia.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n

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Casos relacionados<\/h2><\/div><\/div><\/div><\/div><\/div><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"Descri\u00e7\u00e3o Os dep\u00f3sitos de areia e cascalho que se encontram nas praias ou nos rios e ribeiros s\u00e3o constitu\u00eddos maioritariamente por gr\u00e3os de quartzo (di\u00f3xido de sil\u00edcio, SiO2). A meteoriza\u00e7\u00e3o de rochas como o granito forma estes gr\u00e3os de quartzo. No processo de meteoriza\u00e7\u00e3o, os minerais mais macios e fracos do granito (como o feldspato) s\u00e3o desgastados. O quartzo mais resistente acaba por ser triturado ... Continuar a ler Areia e cascalho<\/span><\/a>","protected":false},"author":1,"featured_media":7414,"parent":0,"menu_order":31,"comment_status":"open","ping_status":"open","template":"","format":"standard","meta":{"_acf_changed":false,"ngg_post_thumbnail":0,"footnotes":""},"class_list":["post-7413","solutions","type-solutions","status-publish","format-standard","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"\nSand and Gravel Processing | Equipment, Flow, Cases - JXSC<\/title>\n<meta name=\"description\" content=\"Sand and Gravel 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-areia-e-cascalho\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Sand and Gravel Processing | Equipment, Flow, Cases - 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