{"id":5170,"date":"2023-08-11T09:31:53","date_gmt":"2023-08-11T07:31:53","guid":{"rendered":"https:\/\/staging.rhosonics.com\/?p=5170"},"modified":"2023-09-28T13:45:04","modified_gmt":"2023-09-28T11:45:04","slug":"process-control-in-the-grinding-circuit","status":"publish","type":"post","link":"https:\/\/staging.rhosonics.com\/pt-br\/insight\/blog\/process-control-in-the-grinding-circuit\/","title":{"rendered":"Controle de processo no circuito de moagem"},"content":{"rendered":"

As plantas de processamento mineral adotaram sistemas avan\u00e7ados para gerenciar suas opera\u00e7\u00f5es com efici\u00eancia. Um componente crucial desses sistemas \u00e9 a instrumenta\u00e7\u00e3o, que auxilia na obten\u00e7\u00e3o de dados em tempo real relativos a v\u00e1rios processos. Os dados coletados s\u00e3o ent\u00e3o utilizados em loops de controle, permitindo um controle preciso das opera\u00e7\u00f5es. <\/span><\/p>\n

As informa\u00e7\u00f5es obtidas por esses instrumentos servem para fins de controle de processos, como a regulagem de v\u00e1lvulas e bombas e o gerenciamento da adi\u00e7\u00e3o de \u00e1gua de dilui\u00e7\u00e3o \u00e0s polpas. Nesta postagem do blog, exploraremos as principais vari\u00e1veis de controle normalmente encontradas no circuito de moagem. <\/span><\/p>\n

Primeiro, discutiremos brevemente como uma f\u00e1brica de processamento t\u00edpica gerencia dados para fins de controle de processo, com a f\u00e1brica Maria Dama na Col\u00f4mbia como um estudo de caso exemplar.<\/span><\/p>\n

Controle de processos na Maria Dama<\/h6>\n

A Maria Dama adotou o sistema de controle SCADA, um poderoso sistema de aquisi\u00e7\u00e3o de dados e monitoramento. O SCADA desempenha um papel crucial na coleta de vari\u00e1veis e dados de dispositivos de campo, que s\u00e3o ent\u00e3o transmitidos aos servidores e transformados em informa\u00e7\u00f5es valiosas sobre o processo.<\/p>\n

Essas informa\u00e7\u00f5es em tempo real s\u00e3o convenientemente exibidas em monitores na sala de controle do local, permitindo que os operadores respondam prontamente aos requisitos operacionais.<\/p>\n

Uma das principais opera\u00e7\u00f5es monitoradas \u00e9 o circuito de moagem, onde m\u00e9tricas cruciais, como a produ\u00e7\u00e3o hor\u00e1ria de min\u00e9rio processado, podem ser facilmente rastreadas. No est\u00e1gio de separa\u00e7\u00e3o do min\u00e9rio, par\u00e2metros como densidade, vaz\u00e3o, tamanho da part\u00edcula e press\u00e3o s\u00e3o normalmente monitorados constantemente para garantir as medidas de desempenho.<\/p>\n

As informa\u00e7\u00f5es recebidas permitem que os operadores analisem rapidamente o comportamento do processo, possibilitando a tomada de decis\u00f5es e a an\u00e1lise mais r\u00e1pidas do comportamento do processo, a fim de obter alto desempenho e efici\u00eancia da planta.<\/p>\n

Alguns benef\u00edcios dos controles avan\u00e7ados de processo<\/h6>\n
(I) Controle total da planta por meio de monitoramento<\/i><\/h6>\n

H\u00e1 muitas vantagens em controlar v\u00e1rios par\u00e2metros, como o tamanho da part\u00edcula e a densidade da polpa, para obter um processo de classifica\u00e7\u00e3o eficiente em um ciclone. O ciclone utiliza a for\u00e7a centr\u00edfuga para separar as part\u00edculas da polpa com base em seu tamanho, forma e gravidade espec\u00edfica.<\/p>\n

As part\u00edculas mais grossas se acomodam mais rapidamente e se movem para a parede do ciclone, enquanto as part\u00edculas mais finas se movem em dire\u00e7\u00e3o \u00e0 zona de baixa press\u00e3o e s\u00e3o empurradas para cima.<\/p>\n

A manuten\u00e7\u00e3o de uma determinada densidade de polpa \u00e9 fundamental para a classifica\u00e7\u00e3o ideal das part\u00edculas. O ciclone \u00e9 altamente eficaz para tamanhos de separa\u00e7\u00e3o finos, mas menos eficiente para part\u00edculas de tamanho m\u00e9dio.<\/p>\n

O excesso de \u00e1gua no processo leva \u00e0 produ\u00e7\u00e3o de mais part\u00edculas de tamanho m\u00e9dio, que escapam do circuito de moagem por meio do transbordamento do ciclone, diminuindo a efici\u00eancia do moinho e permitindo que part\u00edculas de tamanhos indesejados entrem nos est\u00e1gios subsequentes do processo.<\/p>\n

(II) Classifica\u00e7\u00e3o ideal de part\u00edculas <\/i><\/h6>\n

Para obter a classifica\u00e7\u00e3o ideal das part\u00edculas, \u00e9 necess\u00e1rio monitorar as altera\u00e7\u00f5es em tempo real na alimenta\u00e7\u00e3o do ciclone. Controlar a porcentagem de s\u00f3lidos no fluxo de alimenta\u00e7\u00e3o usando um medidor de densidade \u00e9 um aspecto fundamental para obter o controle ideal do ciclone. Al\u00e9m disso, os medidores de densidade tamb\u00e9m s\u00e3o usados para monitorar o transbordamento e o subfluxo do ciclone, juntamente com a press\u00e3o e o tamanho das part\u00edculas.<\/p>\n

O conte\u00fado excessivo de s\u00f3lidos pode sobrecarregar o circuito de moagem, resultando em um desempenho ruim da moagem. Portanto, a densidade da polpa deve ser mantida dentro das metas e dos par\u00e2metros especificados inicialmente pela equipe do processo.<\/p>\n

A \u00e1gua pode ser adicionada ao processo para diluir a lama e controlar sua densidade, reduzindo assim o n\u00famero de part\u00edculas de tamanho m\u00e9dio e evitando a moagem deficiente causada pela sobrecarga de s\u00f3lidos.<\/p>\n

A medi\u00e7\u00e3o cont\u00ednua em tempo real \u00e9 essencial no circuito de moagem para garantir que a densidade permane\u00e7a dentro das condi\u00e7\u00f5es ideais.<\/p>\n

(III) Solu\u00e7\u00e3o aprimorada de problemas<\/i><\/h6>\n

A implementa\u00e7\u00e3o de controles avan\u00e7ados proporciona maior estabilidade ao circuito de moagem, gerenciando ativamente os dist\u00farbios e mantendo as condi\u00e7\u00f5es operacionais desejadas. Essa estabilidade se traduz em tempo de inatividade reduzido, menos perturba\u00e7\u00f5es no processo e maior confiabilidade geral.<\/p>\n

Quando o ciclone retorna o min\u00e9rio para o moinho de bolas, tanto o volume total de min\u00e9rio quanto a densidade da polpa aumentam no circuito de moagem. Esse min\u00e9rio reciclado \u00e9 chamado de carga circulante. Se o processo de moagem se tornar menos eficiente, a carga circulante continuar\u00e1 a aumentar at\u00e9 exceder a capacidade de manuseio do circuito.<\/p>\n

Um medidor de densidade pode ser aplicado como um sistema de alerta no circuito de moagem. A medi\u00e7\u00e3o da densidade em tempo real permite detectar o aumento da carga circulante, possibilitando o controle do processo antes que os problemas se tornem incontrol\u00e1veis. O tamanho das part\u00edculas funciona como um importante indicador do desempenho do circuito de moagem e, normalmente, \u00e9 medido por analisadores de tamanho de part\u00edculas on-line (PSA).<\/p>\n

No entanto, a indisponibilidade das medi\u00e7\u00f5es de PSA pode atrapalhar o circuito de controle. Para resolver esse problema, um preditor de tamanho de part\u00edcula autocorretivo foi desenvolvido em um projeto de automa\u00e7\u00e3o em um circuito de moagem na \u00c1frica do Sul.<\/p>\n

Esse preditor calculou o valor do tamanho de part\u00edcula previsto com base na densidade de alimenta\u00e7\u00e3o da polpa, na taxa de fluxo volum\u00e9trico e na queda de press\u00e3o sobre o ciclone. O valor previsto era atualizado a cada cinco minutos. Mesmo quando o valor de PSA era temporariamente perdido, o valor previsto permanecia em estreita concord\u00e2ncia com o valor real quando retornava.<\/p>\n

Em geral, os benef\u00edcios dos controles avan\u00e7ados de processo no circuito de moagem incluem maior efici\u00eancia, melhor qualidade do produto, maior rendimento, variabilidade reduzida, estabilidade operacional, utiliza\u00e7\u00e3o ideal de recursos e monitoramento e diagn\u00f3stico em tempo real.<\/p>\n

Essas vantagens contribuem para a otimiza\u00e7\u00e3o geral do processo e para os benef\u00edcios econ\u00f4micos das opera\u00e7\u00f5es de minera\u00e7\u00e3o e processamento.<\/p>\n<\/div><\/div><\/div>

<\/div><\/div>

 <\/p>\n<\/div>

Para obter mais informa\u00e7\u00f5es sobre a Rhosonics, d\u00ea uma olhada em nosso LinkedIn<\/u><\/a>, Instagram<\/u><\/a> ou Twitter<\/u><\/a> p\u00e1gina. Para perguntas, voc\u00ea pode Entre em contato conosco<\/u><\/a> diretamente ou d\u00ea uma olhada no seguinte p\u00e1gina<\/u><\/a> para entrar em contato com o seu distribuidor local.<\/p>\n<\/div><\/div><\/div><\/div><\/div>","protected":false},"excerpt":{"rendered":"

Voc\u00ea est\u00e1 tendo dificuldades com a opera\u00e7\u00e3o do seu moinho de bolas ou ciclone? H\u00e1 v\u00e1rios motivos para medir a densidade no circuito de moagem, que variam de acordo com a aplica\u00e7\u00e3o. Compartilhamos as finalidades e os benef\u00edcios da medi\u00e7\u00e3o de densidade em diferentes aplica\u00e7\u00f5es no circuito de moagem.<\/p>","protected":false},"author":3,"featured_media":3851,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[18],"tags":[],"class_list":["post-5170","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"acf":[],"yoast_head":"\nProcess control in the grinding circuit - Rhosonics<\/title>\n<meta name=\"description\" content=\"Are you struggling with your ball mill or cyclone operation? There is multiple ways to overcome this by process control in grinding circuit.\" \/>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Process control in the grinding circuit\" \/>\n<meta property=\"og:description\" content=\"Are you struggling with your ball mill or cyclone operation? 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