{"id":14860,"date":"2024-12-13T09:19:54","date_gmt":"2024-12-13T09:19:54","guid":{"rendered":"https:\/\/www.epicmicron.com\/?p=14860"},"modified":"2024-12-17T07:11:10","modified_gmt":"2024-12-17T07:11:10","slug":"analysis-of-the-heavy-calcium-powder-and-changes-in-d100","status":"publish","type":"post","link":"https:\/\/www.epicmicron.com\/pt\/analysis-of-the-heavy-calcium-powder-and-changes-in-d100\/","title":{"rendered":"An\u00e1lise do p\u00f3 de c\u00e1lcio pesado e altera\u00e7\u00f5es no D100"},"content":{"rendered":"<p>Pesquisadores testam o tamanho de part\u00edcula usando um analisador de tamanho de part\u00edcula a laser ap\u00f3s uma \u00fanica classifica\u00e7\u00e3o de p\u00f3 de c\u00e1lcio pesado. Surpreendentemente, o tamanho de part\u00edcula fina sofreu uma altera\u00e7\u00e3o, e o valor D100 aumentou. Ap\u00f3s uma segunda classifica\u00e7\u00e3o, o valor D100 aumentou novamente, levando a mais confus\u00e3o.<\/p>\n\n\n\n<p>Inicialmente, havia uma suspeita de que outros p\u00f3s poderiam estar se misturando ao p\u00f3 de c\u00e1lcio. No entanto, ap\u00f3s descartar essa possibilidade, o problema persistiu. Ent\u00e3o, vamos nos concentrar no processo de classifica\u00e7\u00e3o e m\u00e9todos de detec\u00e7\u00e3o para entender por que isso acontece.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"900\" height=\"392\" src=\"https:\/\/www.epicmicron.com\/wp-content\/uploads\/2024\/12\/Calcium-carbonate-powder-of-different-particle-sizes.webp\" alt=\"P\u00f3 de carbonato de c\u00e1lcio de diferentes tamanhos de part\u00edculas\" class=\"wp-image-14861\" srcset=\"https:\/\/www.epicmicron.com\/wp-content\/uploads\/2024\/12\/Calcium-carbonate-powder-of-different-particle-sizes.webp 900w, https:\/\/www.epicmicron.com\/wp-content\/uploads\/2024\/12\/Calcium-carbonate-powder-of-different-particle-sizes-300x131.webp 300w, https:\/\/www.epicmicron.com\/wp-content\/uploads\/2024\/12\/Calcium-carbonate-powder-of-different-particle-sizes-768x335.webp 768w, https:\/\/www.epicmicron.com\/wp-content\/uploads\/2024\/12\/Calcium-carbonate-powder-of-different-particle-sizes-18x8.webp 18w, https:\/\/www.epicmicron.com\/wp-content\/uploads\/2024\/12\/Calcium-carbonate-powder-of-different-particle-sizes-600x261.webp 600w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/><figcaption class=\"wp-element-caption\">P\u00f3 de carbonato de c\u00e1lcio de diferentes tamanhos de part\u00edculas<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Excluindo <a href=\"https:\/\/en.wikipedia.org\/wiki\/Contamination\">Contamina\u00e7\u00e3o<\/a>: Foco em Classifica\u00e7\u00e3o e Detec\u00e7\u00e3o<\/h2>\n\n\n\n<p>\u00c9 improv\u00e1vel que se misture com outros p\u00f3s, ent\u00e3o vamos dar uma olhada no processo de classifica\u00e7\u00e3o e nos m\u00e9todos de detec\u00e7\u00e3o. Aqui est\u00e1 uma an\u00e1lise simples para fornecer clareza.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Equipamento de moagem e fun\u00e7\u00e3o de classificador<\/h2>\n\n\n\n<p>O <a href=\"https:\/\/www.epicmicron.com\/pt\">equipamento de moagem<\/a> sopra part\u00edculas de p\u00f3 para dentro do classificador por meio de um fluxo de ar ascendente. Este classificador, ou classificador de fluxo de ar, usa for\u00e7a centr\u00edfuga mec\u00e2nica para acelerar as part\u00edculas de p\u00f3 no fluxo de ar. Part\u00edculas maiores s\u00e3o lan\u00e7adas para fora, atingindo a parede de ferro e perdendo energia cin\u00e9tica, o que faz com que caiam de volta. Enquanto isso, part\u00edculas menores permanecem no centro do fluxo de ar e s\u00e3o transportadas para o coletor de p\u00f3 ou outros est\u00e1gios de processamento subsequentes.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Analisador de tamanho de part\u00edculas a laser<\/h3>\n\n\n\n<p>O analisador de tamanho de part\u00edculas a laser testa tamanhos de part\u00edculas colocando part\u00edculas de p\u00f3 de fase dilu\u00edda em uma solu\u00e7\u00e3o aquosa. O analisador usa fontes de luz simples ou duplas de comprimentos de onda espec\u00edficos para induzir interfer\u00eancia ou difra\u00e7\u00e3o. Ele se baseia em modelos como o <strong>MIE<\/strong> ou <strong>Fraunhofer<\/strong> para simular a intera\u00e7\u00e3o da luz com part\u00edculas. Ent\u00e3o ele calcula dados estat\u00edsticos sobre o di\u00e2metro do volume.<\/p>\n\n\n\n<p><strong>Modelo MIE<\/strong>: Usado principalmente para tamanhos de part\u00edculas em n\u00edvel nanom\u00e9trico.<\/p>\n\n\n\n<p><strong>Modelo Fraunhofer (Modelo F)<\/strong>: Mais adequado para tamanhos de part\u00edculas maiores.<\/p>\n\n\n\n<p>O princ\u00edpio por tr\u00e1s desses modelos \u00e9 complexo, mas cada modelo \u00e9 adaptado para diferentes faixas de tamanho de part\u00edculas para nossa an\u00e1lise.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Por que o D100 continua aumentando?<\/h2>\n\n\n\n<p>Quando um p\u00f3 passa por m\u00faltiplas classifica\u00e7\u00f5es, isso pode resultar no valor D100 (o tamanho de part\u00edcula no qual 100% do material \u00e9 menor) aumentando com cada classifica\u00e7\u00e3o. Isso geralmente ocorre devido aos seguintes motivos:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Redistribui\u00e7\u00e3o de Part\u00edculas<\/strong>: Ap\u00f3s cada classifica\u00e7\u00e3o, part\u00edculas mais finas podem ser removidas, deixando para tr\u00e1s uma propor\u00e7\u00e3o maior de part\u00edculas mais grossas. O resultado \u00e9 uma mudan\u00e7a geral na distribui\u00e7\u00e3o do tamanho das part\u00edculas, levando a um aumento no valor D100.<\/li>\n\n\n\n<li><strong>Efici\u00eancia do Classificador<\/strong>: A efici\u00eancia do classificador pode variar, especialmente ao manusear p\u00f3s com uma ampla distribui\u00e7\u00e3o de tamanho de part\u00edcula. A classifica\u00e7\u00e3o inconsistente pode permitir que part\u00edculas mais finas entrem novamente no sistema, causando altera\u00e7\u00f5es nos resultados do tamanho de part\u00edcula.<\/li>\n\n\n\n<li><strong>Variabilidade do m\u00e9todo de medi\u00e7\u00e3o<\/strong>:Os m\u00e9todos do analisador de tamanho de part\u00edculas a laser, particularmente os modelos MIE e Fraunhofer, podem introduzir discrep\u00e2ncias na medi\u00e7\u00e3o dependendo da natureza das part\u00edculas e do comprimento de onda usado para detec\u00e7\u00e3o.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">O papel de D97, D98 e D100 na an\u00e1lise do tamanho de part\u00edculas a laser<\/h3>\n\n\n\n<p>No campo da an\u00e1lise do tamanho de part\u00edculas, grande parte do foco tende a ser <strong>D97<\/strong>\u00a0ou <strong>D98<\/strong>\u00a0valores, que representam os tamanhos de part\u00edculas de corte superior. Embora os pesquisadores raramente discutam <strong>D100<\/strong>. No entanto, se voc\u00ea examinar de perto os resultados dos testes dos analisadores de tamanho de part\u00edculas a laser \u2014 sejam eles da Malvern, Bexter ou outros instrumentos \u2014 voc\u00ea notar\u00e1 que o <strong>D97<\/strong>\u00a0e <strong>D100<\/strong>\u00a0os valores podem diferir significativamente. Essa diferen\u00e7a, frequentemente na faixa de 0,02% a 0,04%, destaca as complexidades envolvidas na medi\u00e7\u00e3o do tamanho de part\u00edculas.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Compreendendo o valor<\/h3>\n\n\n\n<p>O <strong>D100<\/strong>&nbsp;valor representa o tamanho de part\u00edcula no qual 100% da amostra \u00e9 menor. Embora esse valor possa parecer crucial, ele \u00e9 frequentemente ofuscado pelo <strong>D97<\/strong>&nbsp;e <strong>D98<\/strong>&nbsp;medi\u00e7\u00f5es, que se concentram no ponto de corte superior. A discrep\u00e2ncia entre os valores D97 e D100 n\u00e3o \u00e9 necessariamente devido a erros no processo de medi\u00e7\u00e3o, mas sim devido \u00e0 <strong>natureza indireta<\/strong>&nbsp;de an\u00e1lise de tamanho de part\u00edculas a laser.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Analisador de tamanho de part\u00edculas a laser: m\u00e9todo de detec\u00e7\u00e3o indireta<\/h3>\n\n\n\n<p>Analisadores de tamanho de part\u00edculas a laser, como os da Malvern ou Bexter, usam <strong>interfer\u00eancia<\/strong>&nbsp;ou <strong>difra\u00e7\u00e3o<\/strong>&nbsp;modelos para estimar o tamanho das part\u00edculas de p\u00f3. Esses analisadores aplicam modelos matem\u00e1ticos espec\u00edficos, como o <strong>MIE<\/strong>&nbsp;ou <strong>Fraunhofer<\/strong>&nbsp;modelo, para calcular o di\u00e2metro do volume com base nas ondas de interfer\u00eancia criadas quando a luz interage com part\u00edculas de p\u00f3.<\/p>\n\n\n\n<p>No entanto, este processo \u00e9 <strong>indireto<\/strong>\u2014os modelos dependem de c\u00e1lculos estat\u00edsticos em vez de medi\u00e7\u00f5es diretas. Como resultado, podem ocorrer imprecis\u00f5es, especialmente no <strong>extremos<\/strong>\u00a0da faixa de tamanho de part\u00edcula, como os menores (0%) e maiores (100%) tamanhos de part\u00edcula. Essa natureza estat\u00edstica significa que a an\u00e1lise pode excluir estatisticamente certas part\u00edculas grandes, que podem ser muito raras ou muito grandes em rela\u00e7\u00e3o ao comprimento de onda da luz.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Imprecis\u00f5es estat\u00edsticas em part\u00edculas grandes e pequenas<\/h3>\n\n\n\n<p>A precis\u00e3o dos analisadores de tamanho de part\u00edculas a laser \u00e9 frequentemente limitada pela <strong>limiares estat\u00edsticos<\/strong>&nbsp;definido pelos modelos. Quando h\u00e1 um <strong>pequeno n\u00famero<\/strong>&nbsp;de part\u00edculas muito finas, elas podem ser negligenciadas devido a limita\u00e7\u00f5es de amostragem estat\u00edstica. Por outro lado, \u00e0 medida que o n\u00famero de part\u00edculas mais grossas aumenta, elas entram no pool de amostra e contribuem para a distribui\u00e7\u00e3o de tamanho de part\u00edcula observada. Isso leva a <strong>D100<\/strong>&nbsp;valores sendo influenciados por esses limites estat\u00edsticos, que est\u00e3o inerentemente vinculados aos limites de reprodutibilidade e detec\u00e7\u00e3o do analisador.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Conclus\u00e3o<\/h2>\n\n\n\n<p>Analisadores de tamanho de part\u00edculas a laser fornecem dados estat\u00edsticos valiosos por meio de um m\u00e9todo de medi\u00e7\u00e3o indireta. Eles oferecem reprodutibilidade dentro de certas faixas de tamanho de part\u00edculas e s\u00e3o altamente \u00fateis para orientar processos de produ\u00e7\u00e3o e aplica\u00e7\u00e3o. O p\u00f3 consiste em uma ampla faixa de tamanhos de part\u00edculas, e a an\u00e1lise dessas part\u00edculas requer a compreens\u00e3o dos extremos finos e grossos. M\u00e9todos de medi\u00e7\u00e3o direta, como microscopia eletr\u00f4nica, oferecem uma abordagem visual mais precisa para a observa\u00e7\u00e3o do tamanho de part\u00edculas, mas geralmente exigem mais recursos.<\/p>\n\n\n\n<p>Entender as raz\u00f5es por tr\u00e1s das m\u00faltiplas classifica\u00e7\u00f5es de p\u00f3 de c\u00e1lcio pesado e as mudan\u00e7as em D100 envolve considerar tanto o processo de classifica\u00e7\u00e3o quanto as limita\u00e7\u00f5es dos m\u00e9todos de detec\u00e7\u00e3o. Os m\u00faltiplos ciclos de classifica\u00e7\u00e3o e o comportamento do classificador, bem como os modelos usados pelo analisador de tamanho de part\u00edcula a laser, todos desempenham um papel nas mudan\u00e7as observadas na distribui\u00e7\u00e3o do tamanho de part\u00edcula. Ao otimizar o processo de classifica\u00e7\u00e3o e garantir m\u00e9todos de detec\u00e7\u00e3o consistentes, o problema de aumentar os valores de D100 pode diminuir.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"Moinho de bolas e sistema classificador para carbonato de c\u00e1lcio-EPIC\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/SVjfmdFpEOc?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Pesquisadores testam o tamanho de part\u00edcula usando um analisador de tamanho de part\u00edcula a laser ap\u00f3s uma \u00fanica classifica\u00e7\u00e3o de p\u00f3 de c\u00e1lcio pesado. Surpreendentemente, o tamanho de part\u00edcula fina tem uma mudan\u00e7a, e o D100 [\u2026]<\/p>","protected":false},"author":2,"featured_media":14861,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","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":"","ast-disable-related-posts":"","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":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[42],"tags":[],"class_list":["post-14860","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry-news"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.3 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Analysis of the Heavy Calcium Powder and Changes in D100 - Jet Mill Equipment Manufacturer<\/title>\n<meta name=\"description\" content=\"The fine particle size was found to change, and the D100 value increased. 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