{"id":6576,"date":"2020-11-19T08:47:59","date_gmt":"2020-11-19T08:47:59","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=6576"},"modified":"2020-11-19T08:47:59","modified_gmt":"2020-11-19T08:47:59","slug":"molten-aluminum-rotating-degassing","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/molten-aluminum-rotating-degassing\/","title":{"rendered":"Desgaseifica\u00e7\u00e3o por rota\u00e7\u00e3o de alum\u00ednio fundido"},"content":{"rendered":"

Como a umidade e os res\u00edduos de ferrugem na superf\u00edcie do metal s\u00e3o as principais causas da contamina\u00e7\u00e3o da liga devido \u00e0 oxida\u00e7\u00e3o, para se obter uma liga de alum\u00ednio mais pura, o lingote de alum\u00ednio deve estar seco e livre de impurezas. O alum\u00ednio fundido proveniente do forno de fus\u00e3o precisa ser desgaseificado e ter a esc\u00f3ria removida antes de ser transferido para a m\u00e1quina de produ\u00e7\u00e3o. Geralmente, o m\u00e9todo de flota\u00e7\u00e3o \u00e9 utilizado para o refinamento com nitrog\u00eanio, e o agente refinador<\/a> \u00e9 adicionado para a desgaseifica\u00e7\u00e3o rotativa do alum\u00ednio fundido, e as inclus\u00f5es de alumina no alum\u00ednio l\u00edquido s\u00e3o adsorvidas pelas bolhas de nitrog\u00eanio e levadas \u00e0 superf\u00edcie do alum\u00ednio l\u00edquido para remo\u00e7\u00e3o manual.<\/p>\n

Os defeitos porosos nas pe\u00e7as fundidas por inje\u00e7\u00e3o de liga de alum\u00ednio s\u00e3o causados pela absor\u00e7\u00e3o de g\u00e1s pela liga de alum\u00ednio fundida durante a fus\u00e3o; portanto, as medidas preventivas podem ser implementadas j\u00e1 no processo de fus\u00e3o:<\/p>\n

1) A pe\u00e7a deve ser mantida em local seco para evitar a exposi\u00e7\u00e3o \u00e0 umidade causada pela luz solar e pela chuva, de modo a evitar o aumento do teor de hidrog\u00eanio durante a fus\u00e3o;<\/p>\n

2) As ferramentas que entram em contato com o alum\u00ednio fundido devem ser pintadas e pr\u00e9-aquecidas;<\/p>\n

3) Durante a fundi\u00e7\u00e3o, a temperatura do alum\u00ednio fundido deve ser rigorosamente controlada, e o limite n\u00e3o deve exceder 750 \u2103. Quanto mais alta for a temperatura do alum\u00ednio fundido, maior ser\u00e1 a absor\u00e7\u00e3o de hidrog\u00eanio. Quanto maior for o tempo de perman\u00eancia do alum\u00ednio fundido desgaseificado e refinado no saco de transfer\u00eancia, mais rapidamente o teor de g\u00e1s aumenta;<\/p>\n

4) O desareador deve estar suficientemente seco.<\/p>\n

\"Unidade<\/p>\n

Em resumo, partindo da premissa de uma boa gest\u00e3o e controle do processo de fundi\u00e7\u00e3o, \u00e9 poss\u00edvel obter pe\u00e7as fundidas por inje\u00e7\u00e3o de alta qualidade e com menor porosidade. A AdTech oferece fluxo para fundi\u00e7\u00e3o de alum\u00ednio, online unidade de desgaseifica\u00e7\u00e3o<\/a> para desgaseifica\u00e7\u00e3o rotativa de alum\u00ednio fundido. A unidade de desgaseifica\u00e7\u00e3o em linha adota tecnologia avan\u00e7ada de fus\u00e3o com alto teor de sil\u00edcio para garantir uma longa vida \u00fatil; o rotor de desgaseifica\u00e7\u00e3o, o manguito de prote\u00e7\u00e3o do aquecedor e o manguito de prote\u00e7\u00e3o do termopar adotam tecnologia de fabrica\u00e7\u00e3o em cer\u00e2mica, capaz de atender aos requisitos de produ\u00e7\u00e3o de alum\u00ednio de alta precis\u00e3o. A unidade de desgaseifica\u00e7\u00e3o em linha deve ser instalada entre o forno e o equipamento de fundi\u00e7\u00e3o. Ela \u00e9 utilizada para a remo\u00e7\u00e3o de hidrog\u00eanio (H) e esc\u00f3rias do alum\u00ednio fundido. A unidade de desgaseifica\u00e7\u00e3o em linha possui duas fun\u00e7\u00f5es: processamento e aquecimento. Ela atende ao setor de purifica\u00e7\u00e3o de alum\u00ednio fundido de alta precis\u00e3o.<\/p>","protected":false},"excerpt":{"rendered":"

Since the moisture and rust products on the metal surface are the primary reasons for the contamination of the alloy due to oxidation, in order…<\/p>","protected":false},"author":1,"featured_media":6578,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-6576","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nMolten Aluminum Rotating Degassing by Refining Agent<\/title>\n<meta name=\"description\" content=\"The refining agent is added for molten aluminum rotating degassing, and the alumina inclusions are adsorbed by nitrogen bubbles.\" \/>\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-rotating-degassing\/\" \/>\n<meta property=\"og:locale\" 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