{"id":5469,"date":"2019-08-13T14:20:09","date_gmt":"2019-08-13T06:20:09","guid":{"rendered":"https:\/\/www.jxscmachine.com\/?post_type=new&#038;p=5469"},"modified":"2019-09-24T17:13:06","modified_gmt":"2019-09-24T09:13:06","slug":"classificacao-granulometrica-do-minerio","status":"publish","type":"new","link":"https:\/\/www.jxscmachine.com\/pt\/new\/ore-particle-size-classification\/","title":{"rendered":"Peneiramento a seco de min\u00e9rio de rocha"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><div class=\"vc_row wpb_row vc_row-fluid\"><div class=\"wpb_column vc_column_container vc_col-sm-12\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\">\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p><strong>Peneiramento de min\u00e9rio<\/strong> consiste em peneirar e separar o material com um tamanho de part\u00edcula inferior a 250 um, entre os quais a classifica\u00e7\u00e3o de materiais inferiores a 10 um \u00e9 denominada classifica\u00e7\u00e3o superfina. A classifica\u00e7\u00e3o do min\u00e9rio afecta o processo de tritura\u00e7\u00e3o e moagem e controla a dimens\u00e3o das part\u00edculas do produto final, que desempenha um papel importante na qualidade do produto.<\/p>\n<p>O peneiramento de min\u00e9rio divide-se em <strong>tipo h\u00famido<\/strong> e <strong>crivagem por via seca<\/strong>O primeiro refere-se ao material num meio l\u00edquido (geralmente \u00e1gua), e o segundo refere-se \u00e0 classifica\u00e7\u00e3o processada num meio gasoso (geralmente ar).<\/p>\n<p>A classifica\u00e7\u00e3o por via seca \u00e9 a \u00fanica op\u00e7\u00e3o em zonas onde a \u00e1gua \u00e9 escassa e seca, e onde n\u00e3o \u00e9 permitida a entrada de \u00e1gua no processo. Al\u00e9m disso, nas regi\u00f5es frias, a aplica\u00e7\u00e3o da classifica\u00e7\u00e3o a seco n\u00e3o \u00e9 afetada. O m\u00e9todo de crivagem a seco poupa muita \u00e1gua e elimina tamb\u00e9m o problema da crivagem a h\u00famido e da subsequente desidrata\u00e7\u00e3o, sendo um m\u00e9todo de crivagem eficaz que poupa energia.<\/p>\n<p>Junte-se a n\u00f3s para conhecer o principal princ\u00edpio de triagem de material de min\u00e9rio do tipo seco.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<div id=\"ultimate-heading-4196a217b7c41dae\" class=\"uvc-heading ult-adjust-bottom-margin ultimate-heading-4196a217b7c41dae uvc-7657\" data-hspacer=\"no_spacer\"  data-halign=\"left\" style=\"text-align:left\"><div class=\"uvc-heading-spacer no_spacer\" style=\"top\"><\/div><div class=\"uvc-main-heading ult-responsive\"  data-ultimate-target='.uvc-heading.ultimate-heading-4196a217b7c41dae h2'  data-responsive-json-new='{\"font-size\":\"\",\"line-height\":\"\"}' ><h2 style=\"text-decoration:underline;font-weight:normal;color:#256eed;\">1 Classifica\u00e7\u00e3o por dimens\u00e3o das part\u00edculas<\/h2><\/div><\/div>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p>A classifica\u00e7\u00e3o por tamanho de part\u00edcula \u00e9 principalmente para part\u00edculas finas, que \u00e9 um m\u00e9todo de classifica\u00e7\u00e3o preciso. Existem duas formas de controlar o tamanho das part\u00edculas: poro da malha do crivo e costura do crivo. As malhas do crivo podem controlar o tamanho bidimensional das part\u00edculas, e a costura do crivo s\u00f3 pode controlar o tamanho unidimensional das part\u00edculas, pelo que a granularidade do controlo da malha \u00e9 mais precisa.<br \/>\nA fim de evitar o entupimento, o material fino \u00e9 maioritariamente utilizado como costura de peneira \/ tira de peneira em vez de tipo de poro de malha, e o ecr\u00e3 fino funciona frequentemente num modo de vibra\u00e7\u00e3o de alta frequ\u00eancia.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n\n\t<div  class=\"wpb_single_image wpb_content_element vc_align_center wpb_content_element\">\n\t\t\n\t\t<figure class=\"wpb_wrapper vc_figure\">\n\t\t\t<div class=\"vc_single_image-wrapper   vc_box_border_grey\"><img loading=\"lazy\" decoding=\"async\" width=\"700\" height=\"305\" src=\"https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2019\/08\/vibrating-screen-mesh-and-strip.jpg\" class=\"vc_single_image-img attachment-full\" alt=\"malha e fita de peneira vibrat\u00f3ria\" title=\"malha e fita de peneira vibrat\u00f3ria\" srcset=\"https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2019\/08\/vibrating-screen-mesh-and-strip.jpg 700w, https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2019\/08\/vibrating-screen-mesh-and-strip-300x131.jpg 300w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/div>\n\t\t<\/figure>\n\t<\/div>\n<div id=\"ultimate-heading-68476a217b7c42057\" class=\"uvc-heading ult-adjust-bottom-margin ultimate-heading-68476a217b7c42057 uvc-1171\" data-hspacer=\"no_spacer\"  data-halign=\"left\" style=\"text-align:left\"><div class=\"uvc-heading-spacer no_spacer\" style=\"top\"><\/div><div class=\"uvc-main-heading ult-responsive\"  data-ultimate-target='.uvc-heading.ultimate-heading-68476a217b7c42057 h2'  data-responsive-json-new='{\"font-size\":\"\",\"line-height\":\"\"}' ><h2 style=\"text-decoration:underline;font-weight:normal;color:#256eed;\">2 Classifica\u00e7\u00e3o da sedimenta\u00e7\u00e3o por gravidade<\/h2><\/div><\/div>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p>A classifica\u00e7\u00e3o do assentamento por gravidade \u00e9 realizada pelas diferentes velocidades de assentamento das part\u00edculas de material no meio fluido.<br \/>\nNum fluido que sobe a uma determinada velocidade, a velocidade de sedimenta\u00e7\u00e3o da part\u00edcula mais grosseira \u00e9 superior \u00e0 velocidade ascendente do fluido e, portanto, move-se para baixo; a velocidade de sedimenta\u00e7\u00e3o da part\u00edcula mais fina \u00e9 inferior \u00e0 velocidade ascendente do fluido e, portanto, \u00e9 impulsionada para cima pelo fluido, conseguindo assim a classifica\u00e7\u00e3o.<br \/>\nA densidade das part\u00edculas tem um efeito na velocidade de sedimenta\u00e7\u00e3o e, por conseguinte, tem uma certa influ\u00eancia no processo de classifica\u00e7\u00e3o. A densidade do g\u00e1s \u00e9 inferior \u00e0 do l\u00edquido, pelo que a decanta\u00e7\u00e3o por gravidade a seco \u00e9 mais adequada para a classifica\u00e7\u00e3o de gr\u00e3os finos do que a decanta\u00e7\u00e3o por gravidade h\u00famida.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n\n\t<div  class=\"wpb_single_image wpb_content_element vc_align_center wpb_content_element\">\n\t\t\n\t\t<figure class=\"wpb_wrapper vc_figure\">\n\t\t\t<div class=\"vc_single_image-wrapper   vc_box_border_grey\"><img loading=\"lazy\" decoding=\"async\" width=\"700\" height=\"423\" src=\"https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2019\/08\/vibrating-screen.jpg\" class=\"vc_single_image-img attachment-full\" alt=\"ecr\u00e3 vibrat\u00f3rio\" title=\"ecr\u00e3 vibrat\u00f3rio\" srcset=\"https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2019\/08\/vibrating-screen.jpg 700w, https:\/\/www.jxscmachine.com\/wp-content\/uploads\/2019\/08\/vibrating-screen-300x181.jpg 300w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/div>\n\t\t<\/figure>\n\t<\/div>\n<div id=\"ultimate-heading-98256a217b7c42208\" class=\"uvc-heading ult-adjust-bottom-margin ultimate-heading-98256a217b7c42208 uvc-5946\" data-hspacer=\"no_spacer\"  data-halign=\"left\" style=\"text-align:left\"><div class=\"uvc-heading-spacer no_spacer\" style=\"top\"><\/div><div class=\"uvc-main-heading ult-responsive\"  data-ultimate-target='.uvc-heading.ultimate-heading-98256a217b7c42208 h2'  data-responsive-json-new='{\"font-size\":\"\",\"line-height\":\"\"}' ><h2 style=\"text-decoration:underline;font-weight:normal;color:#256eed;\">3 Classifica\u00e7\u00e3o por in\u00e9rcia<\/h2><\/div><\/div>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p>Quando a dire\u00e7\u00e3o do movimento do fluido muda, as part\u00edculas do material que se movem com o fluido desviam-se da dire\u00e7\u00e3o do movimento do fluido sob o controlo da in\u00e9rcia. Quanto maior for o tamanho da part\u00edcula, maior ser\u00e1 o grau de desvio, pelo que as part\u00edculas de diferentes tamanhos s\u00e3o classificadas. Para evitar o movimento das part\u00edculas com o fluido, \u00e9 necess\u00e1rio que a fric\u00e7\u00e3o entre o fluido e as part\u00edculas do material seja t\u00e3o pequena quanto poss\u00edvel, e a classifica\u00e7\u00e3o a seco \u00e9 mais adequada para adotar este princ\u00edpio.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<div id=\"ultimate-heading-58976a217b7c4225f\" class=\"uvc-heading ult-adjust-bottom-margin ultimate-heading-58976a217b7c4225f uvc-2364\" data-hspacer=\"no_spacer\"  data-halign=\"left\" style=\"text-align:left\"><div class=\"uvc-heading-spacer no_spacer\" style=\"top\"><\/div><div class=\"uvc-main-heading ult-responsive\"  data-ultimate-target='.uvc-heading.ultimate-heading-58976a217b7c4225f h2'  data-responsive-json-new='{\"font-size\":\"\",\"line-height\":\"\"}' ><h2 style=\"text-decoration:underline;font-weight:normal;color:#256eed;\">4 Classifica\u00e7\u00e3o por sedimenta\u00e7\u00e3o centr\u00edfuga<\/h2><\/div><\/div>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p>No campo gravitacional, a classifica\u00e7\u00e3o das part\u00edculas de material \u00e9 limitada pela acelera\u00e7\u00e3o gravitacional, o processo de classifica\u00e7\u00e3o \u00e9 lento, a efici\u00eancia \u00e9 baixa, e o movimento centr\u00edfugo pode melhorar muito a velocidade e a efici\u00eancia da classifica\u00e7\u00e3o.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<div id=\"ultimate-heading-88586a217b7c42298\" class=\"uvc-heading ult-adjust-bottom-margin ultimate-heading-88586a217b7c42298 uvc-9777\" data-hspacer=\"no_spacer\"  data-halign=\"left\" style=\"text-align:left\"><div class=\"uvc-heading-spacer no_spacer\" style=\"top\"><\/div><div class=\"uvc-main-heading ult-responsive\"  data-ultimate-target='.uvc-heading.ultimate-heading-88586a217b7c42298 h2'  data-responsive-json-new='{\"font-size\":\"\",\"line-height\":\"\"}' ><h2 style=\"text-decoration:underline;font-weight:normal;color:#256eed;\">5 Nova classifica\u00e7\u00e3o super fina seca<\/h2><\/div><\/div>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p>Nos \u00faltimos anos, a tecnologia de classifica\u00e7\u00e3o ultrafina tem sido continuamente desenvolvida, sendo as mais proeminentes a classifica\u00e7\u00e3o r\u00e1pida, a classifica\u00e7\u00e3o por descompress\u00e3o e a classifica\u00e7\u00e3o eletrost\u00e1tica de alta tens\u00e3o.<\/p>\n<p>No processo de classifica\u00e7\u00e3o a seco, quanto mais lenta for a velocidade de desloca\u00e7\u00e3o das part\u00edculas, mais pr\u00f3xima est\u00e1 a dimens\u00e3o do ponto de classifica\u00e7\u00e3o (quanto mais lenta for a sedimenta\u00e7\u00e3o das part\u00edculas, mais espessa \u00e9 a dimens\u00e3o das part\u00edculas do corte, mais lenta \u00e9 a dimens\u00e3o das part\u00edculas, mais fina \u00e9 a dimens\u00e3o do corte) e, por conseguinte, a reten\u00e7\u00e3o na zona de classifica\u00e7\u00e3o \u00e9 mais longa. Este facto provocou a acumula\u00e7\u00e3o e aglomera\u00e7\u00e3o desta parte das part\u00edculas, o que interferiu com o processo de classifica\u00e7\u00e3o. Por conseguinte, o processo de classifica\u00e7\u00e3o deve ser conclu\u00eddo o mais rapidamente poss\u00edvel, o que constitui uma classifica\u00e7\u00e3o r\u00e1pida. As medidas de classifica\u00e7\u00e3o r\u00e1pida s\u00e3o micro-alimentos altamente precisos e altamente precisos antes da classifica\u00e7\u00e3o.<\/p>\n<p>Na classifica\u00e7\u00e3o a seco mediada pelo ar, quanto maior for a press\u00e3o do ar na zona de classifica\u00e7\u00e3o, mais lenta ser\u00e1 a velocidade de sedimenta\u00e7\u00e3o dos gr\u00e2nulos e maior ser\u00e1 a classifica\u00e7\u00e3o dos pontos de corte de classifica\u00e7\u00e3o. Por conseguinte, para obter um tamanho de corte mais fino, a press\u00e3o do ar deve ser reduzida, ou seja, a classifica\u00e7\u00e3o por press\u00e3o. A dificuldade em alcan\u00e7ar este princ\u00edpio \u00e9 que quanto menor for a press\u00e3o do ar, pior ser\u00e1 a precis\u00e3o da classifica\u00e7\u00e3o e maior ser\u00e1 a gama de tamanhos de part\u00edculas do produto.<\/p>\n<p>O princ\u00edpio da classifica\u00e7\u00e3o eletrost\u00e1tica de alta tens\u00e3o \u00e9 que as part\u00edculas de p\u00f3 ultrafinas s\u00e3o carregadas e dispersas, e s\u00e3o sujeitas \u00e0 for\u00e7a eletrost\u00e1tica e \u00e0 gravidade no campo eletrost\u00e1tico e no campo gravitacional. As part\u00edculas de diferentes tamanhos de part\u00edculas t\u00eam efeitos diferentes devido \u00e0 for\u00e7a combinada da for\u00e7a eletrost\u00e1tica e da gravidade. Trajet\u00f3ria de movimento para conseguir a classifica\u00e7\u00e3o.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<div class=\"vc_separator wpb_content_element vc_separator_align_center vc_sep_width_100 vc_sep_pos_align_center vc_separator_no_text vc_sep_color_grey wpb_content_element  wpb_content_element\" ><span class=\"vc_sep_holder vc_sep_holder_l\"><span class=\"vc_sep_line\"><\/span><\/span><span class=\"vc_sep_holder vc_sep_holder_r\"><span class=\"vc_sep_line\"><\/span><\/span>\n<\/div>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p>A crivagem do min\u00e9rio afecta o processo de tritura\u00e7\u00e3o e moagem e controla a dimens\u00e3o das part\u00edculas do produto final, que desempenha um papel importante na qualidade do produto.<br \/>\n<strong>JXSC<\/strong>A empresa, com 35 anos de experi\u00eancia no fabrico de equipamento mineiro, fornece diferentes <a href=\"https:\/\/www.jxscmachine.com\/pt\/categoria\/classificacao\/\">tipos de m\u00e1quinas de crivagem de min\u00e9rio<\/a> incluem o tipo h\u00famido e o tipo seco.<br \/>\nClassificador espiral, peneira vibrat\u00f3ria, classificador hidr\u00e1ulico, etc.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>A crivagem do min\u00e9rio afecta o processo de tritura\u00e7\u00e3o e moagem e controla a dimens\u00e3o das part\u00edculas do produto final, que desempenha um papel importante na qualidade do produto.<\/p>","protected":false},"author":1,"featured_media":5476,"parent":0,"menu_order":303,"comment_status":"open","ping_status":"open","template":"","format":"standard","meta":{"_acf_changed":false,"ngg_post_thumbnail":0,"footnotes":""},"categories":[],"tags":[],"class_list":["post-5469","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 - 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