{"id":12333,"date":"2022-01-19T03:07:59","date_gmt":"2022-01-19T03:07:59","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=12333"},"modified":"2022-01-19T03:07:59","modified_gmt":"2022-01-19T03:07:59","slug":"degassing-of-molten-aluminium","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/degassing-of-molten-aluminium\/","title":{"rendered":"Desgaseifica\u00e7\u00e3o do alum\u00ednio fundido"},"content":{"rendered":"

A desgaseifica\u00e7\u00e3o do alum\u00ednio fundido afeta diretamente a qualidade das pe\u00e7as fundidas de alum\u00ednio. Para minimizar a presen\u00e7a de hidrog\u00eanio no alum\u00ednio fundido, \u00e9 necess\u00e1rio adotar um m\u00e9todo de desgaseifica\u00e7\u00e3o que permita remover mais eficazmente o hidrog\u00eanio presente no alum\u00ednio fundido.<\/p>\n

Tendo em vista os problemas acima mencionados, a AdTech oferece servi\u00e7os online sistemas de desgaseifica\u00e7\u00e3o de alum\u00ednio<\/a> que podem realizar a desgaseifica\u00e7\u00e3o de forma mais eficiente e melhorar a qualidade do produto. O g\u00e1s inerte \u00e9 introduzido no alum\u00ednio fundido na concha e conduzido ao rotor, e o rotor \u00e9 girado no alum\u00ednio fundido a uma velocidade de 400 a 500 r\/min. Os sistemas de desgaseifica\u00e7\u00e3o de alum\u00ednio removem o hidrog\u00eanio e as inclus\u00f5es do alum\u00ednio fundido.<\/p>\n

Os sistemas de desgaseifica\u00e7\u00e3o s\u00e3o projetados para a desgaseifica\u00e7\u00e3o em linha de alum\u00ednio fundido com altas taxas de vaz\u00e3o, alto teor de g\u00e1s e alto teor de inclus\u00f5es. Possuem dois rotores de agita\u00e7\u00e3o control\u00e1veis independentemente, que giram em dire\u00e7\u00f5es opostas para proporcionar uma agita\u00e7\u00e3o mais potente. O volume de ar \u00e9 grande, o equipamento \u00e9 instalado diretamente sobre a calha de vazamento, o guindaste horizontal pode ser i\u00e7ado ou as pe\u00e7as de desgaste podem ser substitu\u00eddas, e o bom projeto de isolamento t\u00e9rmico permite a desgaseifica\u00e7\u00e3o cont\u00ednua on-line 24 horas por dia.<\/p>\n

\"Desgaseifica\u00e7\u00e3o<\/p>\n

O princ\u00edpio do sistema de desgaseifica\u00e7\u00e3o online de alum\u00ednio baseia-se na solubilidade do hidrog\u00eanio no alum\u00ednio e na press\u00e3o parcial do hidrog\u00eanio na massa fundida de alum\u00ednio. Quando a press\u00e3o parcial do hidrog\u00eanio correspondente ao teor de hidrog\u00eanio no alum\u00ednio fundido \u00e9 maior do que a press\u00e3o parcial do hidrog\u00eanio no g\u00e1s que est\u00e1 em contato com o alum\u00ednio fundido, o hidrog\u00eanio presente no alum\u00ednio fundido se difunde para a fase gasosa, permitindo a remo\u00e7\u00e3o do hidrog\u00eanio.<\/p>\n

Portanto, a fim de remover o m\u00e1ximo poss\u00edvel de hidrog\u00eanio da massa fundida de alum\u00ednio utilizando a menor quantidade poss\u00edvel de g\u00e1s inerte, os seguintes princ\u00edpios devem ser seguidos para a remo\u00e7\u00e3o de hidrog\u00eanio com g\u00e1s inerte em tempo real:<\/p>\n

Quanto menor for o teor de hidrog\u00eanio e oxig\u00eanio no g\u00e1s inerte, melhor.
\nQuanto mais bolhas forem formadas ao injetar um g\u00e1s inerte na massa fundida, menores ser\u00e3o as bolhas e melhor ser\u00e1 a dispersibilidade.
\nQuanto mais tempo as bolhas permanecerem no alum\u00ednio fundido, melhor.<\/p>","protected":false},"excerpt":{"rendered":"

Degassing of Molten Aluminium directly affects the quality of aluminum castings. In order to minimize the hydrogen in the molten aluminum, it is necessary to…<\/p>","protected":false},"author":1,"featured_media":12334,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18],"tags":[13171,642],"class_list":["post-12333","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-degassing-unit","tag-degassing-of-molten-aluminium","tag-online-degassing-system"],"yoast_head":"\nDegassing of Molten Aluminium, Online Degassing System<\/title>\n<meta name=\"description\" content=\"Degassing of Molten Aluminium directly affects the quality of aluminum castings. 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