filtro de leito profundo<\/a>. Isso normalmente envolve a filtragem do alum\u00ednio fundido por meio de um leito de meios cer\u00e2micos de tamanhos variados. Embora esses sistemas sejam geralmente muito eficientes (normalmente com efici\u00eancia de 85% ou mais), sua opera\u00e7\u00e3o pode ser cara. Isso se deve ao espa\u00e7o f\u00edsico necess\u00e1rio e \u00e0 vida \u00fatil limitada dos meios de filtragem. Eles normalmente exigem substitui\u00e7\u00e3o e descarte regulares.<\/p>\nIndependentemente do tipo de filtro utilizado, \u00e9 preciso tomar cuidado para garantir que ele n\u00e3o seja afetado por vibra\u00e7\u00f5es excessivas ou varia\u00e7\u00f5es no n\u00edvel do metal. Essas \u201cperturba\u00e7\u00f5es\u201d levar\u00e3o \u00e0 libera\u00e7\u00e3o de inclus\u00f5es, o que pode, eventualmente, resultar na presen\u00e7a de inclus\u00f5es no produto final. \u00c9 particularmente importante um bom controle do processo a jusante do equipamento de filtragem final. Caso sejam necess\u00e1rios reparos, estes devem incluir preparativos cuidadosos de limpeza e aten\u00e7\u00e3o especial. Al\u00e9m disso, os operadores da fundi\u00e7\u00e3o devem tomar cuidado para minimizar a turbul\u00eancia em determinadas \u00e1reas, como ao redor dos sacos de distribui\u00e7\u00e3o de metal.<\/p>\n
Mesmo com a melhor tecnologia de filtragem dispon\u00edvel, o metal de entrada muito sujo vai sobrecarregar o sistema. Portanto, nunca \u00e9 demais enfatizar a import\u00e2ncia do manuseio correto dos metais antes da filtragem. Quanto mais limpo for o metal que entra no filtro, mais fino ser\u00e1 o filtro que poder\u00e1 ser utilizado, resultando em um metal \u201cainda mais limpo\u201d ao sair do filtro.<\/p>\n
Os tr\u00eas par\u00e2metros principais dos meios filtrantes de espuma cer\u00e2mica para fundi\u00e7\u00f5es s\u00e3o:<\/strong><\/p>\n\u00c1rea do filtro: quanto maior a \u00e1rea, maior o fluxo potencial de metal. No entanto, devido ao risco de danos, placas grandes podem ser dif\u00edceis de manusear.
\nTamanho dos poros: Quanto menor o tamanho dos poros, maior a efici\u00eancia do filtro. No entanto, \u00e9 mais prov\u00e1vel que isso desestimule os atores de m\u00e9dio prazo.
\nEspessura: Quanto mais espesso for o filtro, melhor ser\u00e1 a efici\u00eancia de filtragem. No entanto, pode ser mais dif\u00edcil coloc\u00e1-lo em funcionamento inicialmente.<\/p>","protected":false},"excerpt":{"rendered":"
Foundries Ceramic Foam Filters have simple operation and good short-term results.\u00a0They are usually the most used filtration equipment in many foundries. For some extremely critical…<\/p>","protected":false},"author":1,"featured_media":8960,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[39],"tags":[],"class_list":["post-8952","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-foundry-ceramic-filters"],"yoast_head":"\n
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