{"id":2523,"date":"2025-03-27T05:03:45","date_gmt":"2025-03-27T05:03:45","guid":{"rendered":"https:\/\/cementplantpart.com\/?p=2523"},"modified":"2025-04-03T00:35:04","modified_gmt":"2025-04-03T00:35:04","slug":"selecao-e-substituicao-do-revestimento-do-moinho-de-bolas-e-das-bolas-de-moagem","status":"publish","type":"post","link":"https:\/\/cementplantpart.com\/pt\/selecao-e-substituicao-do-revestimento-do-moinho-de-bolas-e-das-bolas-de-moagem\/","title":{"rendered":"Sele\u00e7\u00e3o e substitui\u00e7\u00e3o do revestimento do moinho de bolas e das bolas de moagem"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"2523\" class=\"elementor elementor-2523\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3a97e42 e-flex e-con-boxed e-con e-parent\" data-id=\"3a97e42\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-670bc74 elementor-widget elementor-widget-text-editor\" data-id=\"670bc74\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><a href=\"https:\/\/cementplantpart.com\/pt\/pecas-sobressalentes-para-moinhos-de-bolas\/revestimento-do-moinho-de-bolas\/\"><strong>Revestimentos para moinhos<\/strong><\/a> e <strong><a href=\"https:\/\/cementplantpart.com\/pt\/pecas-sobressalentes-para-moinhos-de-bolas\/esfera-de-moagem-de-aco-para-moinho-de-bolas\/\">esferas de moagem<\/a> <\/strong>s\u00e3o componentes essenciais para a opera\u00e7\u00e3o de moinhos de bolas. Com o desenvolvimento de modernas tecnologias de produ\u00e7\u00e3o, os di\u00e2metros dos moinhos de bolas aumentaram, com moinhos de cerca de 5 metros de di\u00e2metro sendo usados atualmente. Esse crescimento levou a uma maior demanda pela qualidade dos revestimentos e das bolas de moagem. Devido \u00e0s condi\u00e7\u00f5es operacionais adversas \u00e0s quais os revestimentos e as esferas de moagem est\u00e3o expostos, os custos de manuten\u00e7\u00e3o e substitui\u00e7\u00e3o s\u00e3o altos, o que n\u00e3o apenas desperdi\u00e7a m\u00e3o de obra e recursos, mas tamb\u00e9m afeta diretamente a efici\u00eancia da produ\u00e7\u00e3o. Portanto, a pesquisa de novos materiais resistentes ao desgaste para revestimentos e esferas de moagem \u00e9 fundamental para melhorar a produtividade, reduzir o consumo e promover um processo de produ\u00e7\u00e3o mais eficiente e ecologicamente correto.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a13ccf9 elementor-widget elementor-widget-image\" data-id=\"a13ccf9\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"578\" src=\"https:\/\/cementplantpart.com\/wp-content\/uploads\/2024\/12\/Ball-Mill-Liner-Diaphragm-Plate-Shell-Plate-Outlet-Screen-Plate.jpg\" class=\"attachment-large size-large wp-image-526\" alt=\"Revestimento do moinho de bolas Placa do diafragma Placa do casco\" srcset=\"https:\/\/cementplantpart.com\/wp-content\/uploads\/2024\/12\/Ball-Mill-Liner-Diaphragm-Plate-Shell-Plate-Outlet-Screen-Plate.jpg 1024w, https:\/\/cementplantpart.com\/wp-content\/uploads\/2024\/12\/Ball-Mill-Liner-Diaphragm-Plate-Shell-Plate-Outlet-Screen-Plate-300x169.jpg 300w, https:\/\/cementplantpart.com\/wp-content\/uploads\/2024\/12\/Ball-Mill-Liner-Diaphragm-Plate-Shell-Plate-Outlet-Screen-Plate-768x434.jpg 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6114c8f elementor-widget elementor-widget-text-editor\" data-id=\"6114c8f\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3 class=\"\" data-start=\"1011\" data-end=\"1043\">1. Entendendo os revestimentos do moinho de bolas<\/h3><p class=\"\" data-start=\"1045\" data-end=\"1556\">O a\u00e7o tradicional com alto teor de mangan\u00eas n\u00e3o \u00e9 mais adequado para <a href=\"https:\/\/cementplantpart.com\/pt\/pecas-sobressalentes-para-moinhos-de-bolas\/revestimento-do-moinho-de-bolas\/\"><strong>revestimentos para moinhos de bolas<\/strong><\/a>. Isso \u00e9 amplamente reconhecido no setor. As desvantagens dos revestimentos de a\u00e7o com alto teor de mangan\u00eas incluem a suscetibilidade \u00e0 flu\u00eancia e \u00e0 extens\u00e3o, bem como transforma\u00e7\u00f5es de fase da superf\u00edcie que causam deforma\u00e7\u00e3o por curvatura. Esses problemas impossibilitam a obten\u00e7\u00e3o do efeito ideal de endurecimento por trabalho nas condi\u00e7\u00f5es adversas de um moinho de bolas. O primeiro leva ao vazamento de p\u00f3 e \u00e0 quebra de parafusos, enquanto o segundo impede a resist\u00eancia ao desgaste esperada.<\/p><p class=\"\" data-start=\"1558\" data-end=\"2076\">Nas d\u00e9cadas de 1970 e 1980, foram introduzidos v\u00e1rios materiais de revestimento e esferas de moagem de alta dureza, como ferro fundido com alto teor de cromo, ferro fundido com n\u00edquel duro, a\u00e7o de liga com alto teor de carbono, ferro de esfera martens\u00edtico e alguns a\u00e7os de liga com teor m\u00e9dio de carbono. No entanto, esses materiais apresentavam baixos valores de resist\u00eancia - alguns t\u00e3o baixos quanto 5J. Devido \u00e0s limita\u00e7\u00f5es impostas pelos projetos tradicionais de revestimento, esses materiais n\u00e3o foram amplamente adotados. A quebra do revestimento se tornou o maior obst\u00e1culo para a aplica\u00e7\u00e3o de materiais de alta dureza e resistentes ao desgaste.<\/p><p class=\"\" data-start=\"2078\" data-end=\"2905\">Os projetos tradicionais de revestimento s\u00e3o fundamentalmente falhos e n\u00e3o podem acomodar o desenvolvimento de materiais resistentes ao desgaste. Os dois principais tipos de estruturas de instala\u00e7\u00e3o de revestimento s\u00e3o: um usado em usinas t\u00e9rmicas com ranhuras em cauda de andorinha e parafusos de cunha e outro amplamente usado em minera\u00e7\u00e3o, cimento, ind\u00fastrias qu\u00edmicas e grandes usinas de energia, em que cada revestimento \u00e9 aparafusado ao tambor. O primeiro projeto, embora potencialmente eficaz em alguns casos, leva ao r\u00e1pido desgaste dos parafusos de cunha, que s\u00e3o o m\u00e9todo de fixa\u00e7\u00e3o mais inst\u00e1vel. O \u00faltimo projeto, que envolve v\u00e1rios furos e parafusos, cria poss\u00edveis pontos de vazamento e aumenta a intensidade da m\u00e3o de obra. Esses projetos s\u00e3o claramente falhos, especialmente considerando que a fixa\u00e7\u00e3o dos revestimentos com furos cria v\u00e1rias fontes de rachaduras durante o processo de fundi\u00e7\u00e3o e tratamento t\u00e9rmico.<\/p><h4 class=\"\" data-start=\"2907\" data-end=\"2961\">O revestimento composto para moinho de bolas \"autofixante e sem parafusos\"<\/h4><p class=\"\" data-start=\"2963\" data-end=\"3379\">Em resposta \u00e0s defici\u00eancias dos projetos tradicionais, desenvolvemos o \"Composite Self-Fixing, Bolt-Free Ball Mill Liner\", um produto revolucion\u00e1rio que marca um grande avan\u00e7o no projeto do revestimento do moinho de bolas. Esse revestimento composto \u00e9 formado por duas ou tr\u00eas partes independentes: um corpo de liga de alta dureza para resist\u00eancia ao desgaste e uma placa traseira de liga resistente que estabiliza o revestimento e aplica pr\u00e9-tens\u00e3o ao corpo.<\/p><p class=\"\" data-start=\"3381\" data-end=\"3752\">Ao utilizar a geometria do pr\u00f3prio moinho e empregar uma combina\u00e7\u00e3o de dois metais, o revestimento composto usa a a\u00e7\u00e3o das esferas de moagem durante a opera\u00e7\u00e3o para aplicar pr\u00e9-tens\u00e3o, obtendo autofixa\u00e7\u00e3o e aprimorando a integridade estrutural geral do revestimento. Esse projeto melhora significativamente a estabilidade e a confiabilidade dos revestimentos de materiais de alta dureza e baixa tenacidade.<\/p><p class=\"\" data-start=\"3754\" data-end=\"4304\">Os processos de fabrica\u00e7\u00e3o e instala\u00e7\u00e3o dos revestimentos compostos s\u00e3o mais simples do que os revestimentos tradicionais, n\u00e3o exigindo modifica\u00e7\u00f5es nos moinhos existentes. Nos \u00faltimos 20 anos, esse projeto inovador de revestimento foi aplicado com sucesso em usinas de energia t\u00e9rmica, f\u00e1bricas de cimento, minera\u00e7\u00e3o e ind\u00fastrias de fosfato, comprovando sua estabilidade superior, confiabilidade e desempenho de longo prazo. Os requisitos de manuten\u00e7\u00e3o s\u00e3o m\u00ednimos e o revestimento pode durar muito mais do que os projetos tradicionais, contribuindo para a redu\u00e7\u00e3o dos n\u00edveis de ru\u00eddo e para um ambiente de trabalho mais seguro.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1f7a6f8 elementor-widget elementor-widget-image\" data-id=\"1f7a6f8\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/cementplantpart.com\/wp-content\/uploads\/2024\/12\/High-Manganese-Steel-Mill-Liner-for-Ball-Mill.webp\" class=\"attachment-large size-large wp-image-531\" alt=\"revestimento e carca\u00e7a do moinho de bolas da f\u00e1brica de cimento\" srcset=\"https:\/\/cementplantpart.com\/wp-content\/uploads\/2024\/12\/High-Manganese-Steel-Mill-Liner-for-Ball-Mill.webp 1024w, https:\/\/cementplantpart.com\/wp-content\/uploads\/2024\/12\/High-Manganese-Steel-Mill-Liner-for-Ball-Mill-300x225.webp 300w, https:\/\/cementplantpart.com\/wp-content\/uploads\/2024\/12\/High-Manganese-Steel-Mill-Liner-for-Ball-Mill-768x576.webp 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-33b2b8c elementor-widget elementor-widget-text-editor\" data-id=\"33b2b8c\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3 class=\"\" data-start=\"4306\" data-end=\"4345\">2. A import\u00e2ncia das esferas de moagem<\/h3><p class=\"\" data-start=\"4347\" data-end=\"4716\"><a href=\"https:\/\/cementplantpart.com\/pt\/pecas-sobressalentes-para-moinhos-de-bolas\/esfera-de-moagem-de-aco-para-moinho-de-bolas\/\"><strong>Esferas de moagem<\/strong><\/a> usadas em moinhos de bolas s\u00e3o normalmente feitas de ferro fundido com alto teor de carbono e alta liga ou bolas forjadas ou fundidas com alto teor de carbono e baixa liga. Em processos secos, como os usados em usinas termel\u00e9tricas e ind\u00fastrias de cimento, as esferas de ferro fundido com alto teor de cromo s\u00e3o comumente usadas, enquanto as opera\u00e7\u00f5es de minera\u00e7\u00e3o, que normalmente usam processos \u00famidos, costumam usar esferas de alto carbono e baixa liga.<\/p><p class=\"\" data-start=\"4718\" data-end=\"5177\">A variedade de esferas de moagem no mercado \u00e9 grande e, em alguns casos, a escolha das esferas n\u00e3o \u00e9 feita com base na efici\u00eancia do processo, mas sim com base na disponibilidade e no custo. Os principais tipos de esferas de moagem incluem esferas de ferro fundido com alto teor de cromo (por exemplo, Cr8, Cr12, Cr15, Cr18, Cr24) e esferas de ferro fundido com baixo teor de cromo. As esferas de ferro fundido martens\u00edtico e as esferas de ferro fundido com baixo teor de cromo oferecem resist\u00eancia semelhante ao desgaste, mas a principal diferen\u00e7a est\u00e1 no processo de produ\u00e7\u00e3o.<\/p><p class=\"\" data-start=\"5179\" data-end=\"5559\">As esferas de moagem de ferro fundido com alto teor de cromo oferecem excelente resist\u00eancia ao desgaste, com a taxa de desgaste em usinas de energia e f\u00e1bricas de cimento variando normalmente de 15 a 50 gramas por tonelada. O uso de esferas com alto teor de cromo n\u00e3o apenas reduz os custos, mas tamb\u00e9m minimiza o consumo de m\u00e3o de obra e eletricidade, o que as torna uma op\u00e7\u00e3o ecologicamente correta. Podemos cham\u00e1-las com confian\u00e7a de \"bolas de moagem verdes\".<\/p><p class=\"\" data-start=\"5561\" data-end=\"5894\">Para aplica\u00e7\u00f5es de minera\u00e7\u00e3o, especialmente em processos \u00famidos, as esferas de liga com baixo teor de cromo s\u00e3o comumente usadas. Em geral, essas esferas est\u00e3o na faixa de 500 a 700 gramas por tonelada em opera\u00e7\u00f5es de minera\u00e7\u00e3o de cobre, ferro e molibd\u00eanio. Ao melhorar a dureza das esferas com baixo teor de cromo (por exemplo, atingir HRC55), a resist\u00eancia ao desgaste pode ser significativamente aprimorada.<\/p><h3 class=\"\" data-start=\"5896\" data-end=\"5958\">3. A rela\u00e7\u00e3o entre os revestimentos do moinho e as bolas de moagem<\/h3><p class=\"\" data-start=\"5960\" data-end=\"6319\">Uma concep\u00e7\u00e3o err\u00f4nea comumente aceita \u00e9 a de que as bolas de moagem devem ter uma dureza 3-5 HRc maior do que a dos revestimentos. Entretanto, na realidade, o revestimento desempenha um papel muito mais significativo na opera\u00e7\u00e3o do moinho de bolas. O foco principal deve ser garantir que o revestimento tenha uma vida \u00fatil longa, idealmente dois ciclos de revis\u00e3o, com manuten\u00e7\u00e3o m\u00ednima.<\/p><p class=\"\" data-start=\"6321\" data-end=\"6649\">A escolha do material certo para os revestimentos e as esferas de moagem \u00e9 essencial. Para os revestimentos, materiais como os revestimentos compostos de ferro fundido com alto teor de cromo e auto-fixa\u00e7\u00e3o devem ser priorizados por sua longa vida \u00fatil e confiabilidade. Para as bolas de moagem, devem ser selecionadas as melhores bolas resistentes ao desgaste para combinar com o material do revestimento.<\/p><p class=\"\" data-start=\"6651\" data-end=\"6959\">\u00c9 fundamental escolher revestimentos com dureza superior a HRc50, pois isso garante a melhor resist\u00eancia ao desgaste. As esferas de moagem de ferro fundido com alto teor de cromo ou de a\u00e7o-liga forjado com dureza superior a HRc52 (fundidas) ou HRc55 (forjadas) s\u00e3o a escolha ideal para garantir a longevidade de todo o sistema de moagem.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-68e5a3a elementor-widget elementor-widget-image\" data-id=\"68e5a3a\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"500\" height=\"374\" src=\"https:\/\/cementplantpart.com\/wp-content\/uploads\/2024\/12\/High-Chrome-White-Cast-Iron-Ball-Mill-Liner.jpg\" class=\"attachment-large size-large wp-image-530\" alt=\"Revestimento de ferro fundido branco de alto cromo para moinho de bolas\" srcset=\"https:\/\/cementplantpart.com\/wp-content\/uploads\/2024\/12\/High-Chrome-White-Cast-Iron-Ball-Mill-Liner.jpg 500w, https:\/\/cementplantpart.com\/wp-content\/uploads\/2024\/12\/High-Chrome-White-Cast-Iron-Ball-Mill-Liner-300x224.jpg 300w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8c63ab7 elementor-widget elementor-widget-text-editor\" data-id=\"8c63ab7\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3 class=\"\" data-start=\"6961\" data-end=\"6978\">4. Conclus\u00e3o<\/h3><ul data-start=\"6980\" data-end=\"8129\"><li class=\"\" data-start=\"6980\" data-end=\"7345\"><p class=\"\" data-start=\"6982\" data-end=\"7345\"><strong data-start=\"6982\" data-end=\"7036\">A\u00e7o com alto teor de mangan\u00eas e projetos tradicionais de revestimento<\/strong>: N\u00e3o s\u00e3o adequados para moinhos de bolas modernos. O design revolucion\u00e1rio do revestimento autofixante composto resolve de forma eficaz problemas como quebra de parafusos e vazamento de p\u00f3, reduzindo a manuten\u00e7\u00e3o em mais de 98%. Ele maximiza a dureza e a resist\u00eancia ao desgaste dos materiais, obtendo um \u00f3timo desempenho de moagem.<\/p><\/li><li class=\"\" data-start=\"7347\" data-end=\"7760\"><p class=\"\" data-start=\"7349\" data-end=\"7760\"><strong data-start=\"7349\" data-end=\"7395\">Sele\u00e7\u00e3o do material do revestimento e da esfera de moagem<\/strong>: Nos processos secos, as usinas de energia e as f\u00e1bricas de cimento devem priorizar os revestimentos de a\u00e7o de liga de m\u00e9dio e baixo cromo ou de ferro fundido de alto cromo, combinados com esferas de moagem de ferro fundido de alta dureza e alto cromo. Em aplica\u00e7\u00f5es de minera\u00e7\u00e3o, devem ser escolhidos revestimentos de a\u00e7o de liga de baixo carbono ou revestimentos de ferro fundido de baixo cromo, com esferas de moagem de liga de baixo cromo de alta dureza.<\/p><\/li><li class=\"\" data-start=\"7762\" data-end=\"8129\"><p class=\"\" data-start=\"7764\" data-end=\"8129\"><strong data-start=\"7764\" data-end=\"7802\">Correspond\u00eancia de revestimentos e esferas de moagem<\/strong>: O revestimento \u00e9 o principal fator para determinar a efici\u00eancia de moagem do moinho. A escolha dos revestimentos corretos com uma vida \u00fatil de pelo menos dois ciclos de revis\u00e3o permite uma melhor sele\u00e7\u00e3o das bolas de moagem. O ideal \u00e9 que os revestimentos e as bolas de moagem sejam escolhidos para manter o desempenho ideal pelo per\u00edodo mais longo poss\u00edvel.<\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Os revestimentos de moinho e as bolas de moagem s\u00e3o componentes essenciais para a opera\u00e7\u00e3o dos moinhos de bolas. Com o desenvolvimento da produ\u00e7\u00e3o moderna [...]<\/p>","protected":false},"author":1,"featured_media":146,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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