{"id":26435,"date":"2025-12-08T18:29:53","date_gmt":"2025-12-08T21:29:53","guid":{"rendered":"https:\/\/oficialnoticias.com\/?p=26435"},"modified":"2025-12-08T18:29:54","modified_gmt":"2025-12-08T21:29:54","slug":"tratamento-e-reaproveitamento-de-rejeitos-apontam-nova-fase-da-mineracao","status":"publish","type":"post","link":"https:\/\/oficialnoticias.com\/?p=26435","title":{"rendered":"Tratamento e reaproveitamento de rejeitos apontam nova fase da minera\u00e7\u00e3o"},"content":{"rendered":"<p><\/p>\n<div>\n<p>O tratamento e o <bsp-link-enhancement><br \/>\n    <span class=\"LinkEnhancement\"><a class=\"Link\" href=\"https:\/\/www.itatiaia.com.br\/negocios\/eloos\/residuos-que-viram-recurso-circularidade-ganha-forca-na-mineracao\" title=\"reaproveitamento de rejeitos\">reaproveitamento de rejeitos<\/a><\/span><\/bsp-link-enhancement> v\u00eam ganhando espa\u00e7o como parte integrante das opera\u00e7\u00f5es minerais e n\u00e3o mais apenas como um passivo ambiental. Segundo Andr\u00e9 Luis Pimenta de Faria, coordenador do CIT Senai ITR, essa mudan\u00e7a est\u00e1 associada a uma vis\u00e3o t\u00e9cnica e econ\u00f4mica mais madura, alinhada \u00e0<bsp-link-enhancement><br \/>\n    <span class=\"LinkEnhancement\"><a class=\"Link\" href=\"https:\/\/www.itatiaia.com.br\/economia\/negocios\/industria\/reaproveitamento-de-residuos-avancou-com-logistica-reversa-e-economia-circular\" title=\" economia circular \"> economia circular <\/a><\/span><\/bsp-link-enhancement>e ao rigor no gerenciamento de riscos.<\/p>\n<h2>Viabilidade t\u00e9cnica e seguran\u00e7a geot\u00e9cnica<\/h2>\n<p>A viabilidade de reprocessar rejeitos de barragens antigas depende principalmente da mineralogia, do teor residual e da seguran\u00e7a estrutural do reservat\u00f3rio. Faria explica que muitos rejeitos hist\u00f3ricos apresentam granulometria fina e teores intermedi\u00e1rios, que antes n\u00e3o justificavam recupera\u00e7\u00e3o, mas hoje se tornam aproveit\u00e1veis com tecnologias mais eficientes. Ele ressalta, contudo, que qualquer interven\u00e7\u00e3o exige extremo cuidado geot\u00e9cnico, j\u00e1 que a retirada de material pode alterar tens\u00f5es internas e comprometer a estabilidade da barragem.<\/p>\n<p>O especialista destaca que o reaproveitamento n\u00e3o se limita \u00e0 recupera\u00e7\u00e3o de metais. Rejeitos est\u00e1veis e bem caracterizados podem ser aplicados na produ\u00e7\u00e3o de cimento, cer\u00e2mica, blocos, argamassas, pavimenta\u00e7\u00e3o e concretos n\u00e3o estruturais. <\/p>\n<p>No entanto, h\u00e1 barreiras a vencer, como o enquadramento normativo, a comprova\u00e7\u00e3o de desempenho mec\u00e2nico e a necessidade de assegurar que n\u00e3o ocorra lixivia\u00e7\u00e3o ou mobiliza\u00e7\u00e3o de contaminantes. \u201cO reaproveitamento complementa a responsabilidade ambiental, n\u00e3o a substitui\u201d, afirma o coordenador.<\/p>\n<h2>Desaguamento e empilhamento a seco<\/h2>\n<p>Na \u00e1rea de desaguamento, tecnologias como espessamento de alta densidade, filtra\u00e7\u00e3o e <bsp-link-enhancement><br \/>\n    <span class=\"LinkEnhancement\"><a class=\"Link\" href=\"https:\/\/www.itatiaia.com.br\/negocios\/eloos\/mineradoras-eliminam-barragens-e-investem-em-empilhamento-a-seco-em-mg\" title=\"empilhamento a seco\">empilhamento a seco<\/a><\/span><\/bsp-link-enhancement> j\u00e1 s\u00e3o consideradas maduras e v\u00eam sendo adotadas em diversas opera\u00e7\u00f5es brasileiras. A filtra\u00e7\u00e3o \u00e9 apontada como uma das alternativas mais consistentes para reduzir a depend\u00eancia de barragens convencionais, embora envolva maior investimento, maior consumo energ\u00e9tico e demanda por \u00e1reas adequadas de disposi\u00e7\u00e3o. Faria defende o uso de solu\u00e7\u00f5es h\u00edbridas, combinando desaguamento parcial, backfill e filtragem, para adequar cada rota \u00e0s condi\u00e7\u00f5es espec\u00edficas da mina.<\/p>\n<p>Essas estrat\u00e9gias tamb\u00e9m impactam diretamente o plano de fechamento de mina. Ao tratar e reprocessar parte dos rejeitos, as empresas conseguem reduzir o volume em barragens, acelerar a reabilita\u00e7\u00e3o ambiental e diminuir os passivos de longo prazo. Em alguns casos, o reaproveitamento melhora o desempenho geot\u00e9cnico das \u00e1reas, favorecendo coberturas e drenagens mais seguras.<\/p>\n<p><bsp-list-loadmore class=\"PageListStandardG\" data-module=\"\" data-show-loadmore=\"true\" data-list-title-size=\"3\" data-list-description-size=\"3\"><\/p>\n<p>    <a class=\"AnchorLink\" title=\"leia-tambem\" name=\"leia-tambem\"\/><\/p>\n<p><\/bsp-list-loadmore><\/p>\n<h2>Desafios t\u00e9cnicos e integra\u00e7\u00e3o com novas opera\u00e7\u00f5es<\/h2>\n<p>Entre os desafios t\u00e9cnicos, Faria cita a variabilidade dos rejeitos, a presen\u00e7a de contaminantes e a necessidade de compatibilizar qualquer interven\u00e7\u00e3o com a estabilidade das estruturas existentes. Ele observa que novas minas t\u00eam vantagem por permitir, desde o planejamento inicial, a integra\u00e7\u00e3o entre desaguamento, empilhamento, reaproveitamento e economia circular, o que reduz custos e amplia as possibilidades de uso industrial.<\/p>\n<p>Para o coordenador do CIT Senai ITR, o futuro da minera\u00e7\u00e3o passa por entender os rejeitos como parte do ciclo produtivo. \u201cQuando tratamos o rejeito com rigor t\u00e9cnico, caracterizando e avaliando riscos, conseguimos transformar parte desse material em oportunidade, avan\u00e7ando em seguran\u00e7a e sustentabilidade\u201d, conclui.<\/p>\n<p>Implemente solu\u00e7\u00f5es sustent\u00e1veis para transformar passivos ambientais em valor econ\u00f4mico. <bsp-link-enhancement><br \/>\n    <span class=\"LinkEnhancement\"><a class=\"Link\" href=\"https:\/\/wa.me\/5531993922407?text=Ol%C3%A1%2C%20vi%20a%20mat%C3%A9ria%20da%20Itatiaia%20e%20gostaria%20de%20mais%20informa%C3%A7%C3%B5es.%20\" target=\"_blank\" title=\"Clique para conhecer. \" rel=\"noopener\">Clique para conhecer. <\/a><\/span><\/bsp-link-enhancement><\/p>\n<\/p><\/div>\n<p><script>\n  window.fbAsyncInit = function() {\n      FB.init({\n              appId : '1447052969554341',\n          xfbml : true,\n          version : 'v2.9'\n      });\n  };\n  (function(d, s, id){\n     var js, fjs = d.getElementsByTagName(s)[0];\n     if (d.getElementById(id)) {return;}\n     js = d.createElement(s); js.id = id;\n     js.src = \"https:\/\/connect.facebook.net\/en_US\/sdk.js\";\n     fjs.parentNode.insertBefore(js, fjs);\n   }(document, 'script', 'facebook-jssdk'));\n<\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>O tratamento e o reaproveitamento de rejeitos v\u00eam ganhando espa\u00e7o como parte integrante das opera\u00e7\u00f5es minerais e n\u00e3o mais apenas como um passivo ambiental. Segundo Andr\u00e9 Luis Pimenta de Faria, coordenador do CIT Senai ITR, essa mudan\u00e7a est\u00e1 associada a uma vis\u00e3o t\u00e9cnica e econ\u00f4mica mais madura, alinhada \u00e0 economia circular e ao rigor no&#8230;<\/p>\n","protected":false},"author":2,"featured_media":26436,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[25],"tags":[],"class_list":["post-26435","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-economia"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Tratamento e reaproveitamento de rejeitos apontam nova fase da minera\u00e7\u00e3o -<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/oficialnoticias.com\/?p=26435\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Tratamento e reaproveitamento de rejeitos apontam nova fase da minera\u00e7\u00e3o -\" \/>\n<meta property=\"og:description\" content=\"O tratamento e o reaproveitamento de rejeitos v\u00eam ganhando espa\u00e7o como parte integrante das opera\u00e7\u00f5es minerais e n\u00e3o mais apenas como um passivo ambiental. Segundo Andr\u00e9 Luis Pimenta de Faria, coordenador do CIT Senai ITR, essa mudan\u00e7a est\u00e1 associada a uma vis\u00e3o t\u00e9cnica e econ\u00f4mica mais madura, alinhada \u00e0 economia circular e ao rigor no...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/oficialnoticias.com\/?p=26435\" \/>\n<meta property=\"article:published_time\" content=\"2025-12-08T21:29:53+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-12-08T21:29:54+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/oficialnoticias.com\/wp-content\/uploads\/2025\/12\/urlhttps3A2F2Fk2-prod-radio-itatiaia.s3.us-east-1.amazonaws.com2Fbrightspot2F4f2F302F56f096.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"630\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"Luana Gon\u00e7alves\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta 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