{"id":11654,"date":"2021-12-07T08:35:23","date_gmt":"2021-12-07T08:35:23","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=11654"},"modified":"2021-12-07T08:35:23","modified_gmt":"2021-12-07T08:35:23","slug":"molten-aluminum-filtering-process","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/molten-aluminum-filtering-process\/","title":{"rendered":"Processo de filtragem de alum\u00ednio fundido"},"content":{"rendered":"

O processo de filtragem do alum\u00ednio fundido consiste na remo\u00e7\u00e3o de inclus\u00f5es, principalmente \u00f3xidos e subst\u00e2ncias n\u00e3o met\u00e1licas, por meio do filtro.<\/p>\n

Os m\u00e9todos comuns para filtrar e remover esc\u00f3ria ou impurezas do alum\u00ednio fundido s\u00e3o a filtra\u00e7\u00e3o por espuma cer\u00e2mica, a filtra\u00e7\u00e3o por areia com esferas de alumina e a filtra\u00e7\u00e3o por tubos cer\u00e2micos. Cada um deles tem suas vantagens e desvantagens, e deve-se realizar uma avalia\u00e7\u00e3o e sele\u00e7\u00e3o adequadas com base nos requisitos do produto final e no processo de produ\u00e7\u00e3o utilizado. No entanto, devido \u00e0s suas vantagens exclusivas, placa filtrante de espuma cer\u00e2mica<\/a> continua sendo a melhor maneira de filtrar e purificar o alum\u00ednio fundido.<\/p>\n

Como todos sabemos, as inclus\u00f5es na massa fundida de alum\u00ednio geralmente se apresentam em tr\u00eas formas: \u00f3xidos met\u00e1licos, res\u00edduos de refrat\u00e1rios e outras part\u00edculas estranhas, al\u00e9m de part\u00edculas que s\u00e3o atra\u00eddas durante o processamento da massa fundida.<\/p>\n

Existem, aproximadamente, tr\u00eas maneiras de remover as part\u00edculas em suspens\u00e3o no processo de filtragem do alum\u00ednio fundido:<\/p>\n

Com a sedimenta\u00e7\u00e3o, as part\u00edculas se acumulam no fundo da massa fundida;
\nAo flutuarem, as inclus\u00f5es sobem e se acumulam na superf\u00edcie do material fundido;
\nFiltragem, que separa as part\u00edculas da massa fundida por meio de um meio poroso.<\/p>\n

\"Filtro<\/p>\n

A sedimenta\u00e7\u00e3o natural geralmente ocorre quando a densidade das part\u00edculas \u00e9 relativamente alta e elas s\u00e3o grossas; j\u00e1 a sedimenta\u00e7\u00e3o est\u00e1tica de part\u00edculas menores que 90 \u00b5m n\u00e3o \u00e9 muito eficaz. Bolhas ou solventes fundidos gerados durante a remo\u00e7\u00e3o de g\u00e1s para elimina\u00e7\u00e3o de hidrog\u00eanio ou tratamento de solventes podem levar part\u00edculas de inclus\u00e3o \u00e0 superf\u00edcie da massa fundida. Esse mecanismo tamb\u00e9m n\u00e3o \u00e9 confi\u00e1vel para remover pequenas inclus\u00f5es de 30 \u00b5m a 40 \u00b5m na maioria dos casos. A filtra\u00e7\u00e3o refere-se ao processo no qual a massa fundida flui atrav\u00e9s de esferas densamente compactadas, tecidos de fibra de vidro, malhas met\u00e1licas, placas filtrantes de cer\u00e2mica espumada ou outros meios porosos para separar as part\u00edculas de inclus\u00e3o da massa fundida.<\/p>\n

A vantagem da placa filtrante de espuma cer\u00e2mica \u00e9 que ela consegue remover part\u00edculas de inclus\u00f5es com di\u00e2metro muito menor do que o de seus orif\u00edcios de passagem. A placa filtrante de espuma cer\u00e2mica separa as inclus\u00f5es por meio de filtra\u00e7\u00e3o por peneiramento, por bolo de filtra\u00e7\u00e3o e por leito profundo.<\/p>","protected":false},"excerpt":{"rendered":"

The molten aluminum filtering process is a process of removing inclusions mainly including oxides and non-metallic substances in the filter. Common methods for filtering and…<\/p>","protected":false},"author":1,"featured_media":11655,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[1714,13005],"class_list":["post-11654","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-ceramic-foam-filtration","tag-molten-aluminum-filtering-process"],"yoast_head":"\nMolten Aluminum Filtering Process, Ceramic Foam Filtration<\/title>\n<meta name=\"description\" content=\"The molten aluminum filtering process is a process of removing inclusions mainly including oxides and non-metallic substances in the filter.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.alalloycasting.com\/pt\/molten-aluminum-filtering-process\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" 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