{"id":7294,"date":"2020-12-30T02:35:25","date_gmt":"2020-12-30T02:35:25","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=7294"},"modified":"2020-12-31T08:55:10","modified_gmt":"2020-12-31T08:55:10","slug":"rotary-degassing-technology","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/rotary-degassing-technology\/","title":{"rendered":"Tecnologia de desgaseifica\u00e7\u00e3o rotativa"},"content":{"rendered":"

As fundi\u00e7\u00f5es de alum\u00ednio h\u00e1 muito reconhecem a necessidade de um tratamento eficaz do g\u00e1s de fluxo para remover hidrog\u00eanio e inclus\u00f5es. A fim de atender a essas necessidades das fundi\u00e7\u00f5es, a AdTech projetou e fabricou m\u00e1quinas de desgaseifica\u00e7\u00e3o rotativas em linha para atender aos requisitos de desgaseifica\u00e7\u00e3o com g\u00e1s inerte ou g\u00e1s ativo em refinarias e fundi\u00e7\u00f5es. O desenvolvimento da tecnologia de desgaseifica\u00e7\u00e3o rotativa trouxe avan\u00e7os significativos na desgaseifica\u00e7\u00e3o automatizada, eficiente e econ\u00f4mica. O princ\u00edpio dessas m\u00e1quinas rotativas de desgaseifica\u00e7\u00e3o<\/a>\u00a0exige que o rotor seja capaz de gerar bolhas muito pequenas de g\u00e1s inerte, que sejam distribu\u00eddas de maneira homog\u00eanea e uniforme por toda a massa de metal fundido.<\/p>\n

Tecnologia de desgaseifica\u00e7\u00e3o rotativa<\/h2>\n

A tecnologia de desgaseifica\u00e7\u00e3o rotativa remove esses componentes indesej\u00e1veis por meio da inje\u00e7\u00e3o de um g\u00e1s, geralmente nitrog\u00eanio, no metal fundido. O g\u00e1s \u00e9 normalmente introduzido por meio de um rotor de desgaseifica\u00e7\u00e3o, que reduz o tamanho das bolhas e dispersa o nitrog\u00eanio por todo o banho de metal fundido. \u00c0 medida que as bolhas geradas sobem pela massa de metal fundido, elas absorvem o hidrog\u00eanio dissolvido no metal e o removem da massa fundida. Al\u00e9m disso, as part\u00edculas s\u00f3lidas n\u00e3o met\u00e1licas s\u00e3o levadas para a superf\u00edcie pelo efeito de flota\u00e7\u00e3o das bolhas e, em seguida, podem ser removidas por meio da skimming do metal.<\/p>\n

As bolhas do g\u00e1s inerte s\u00e3o menores e o tempo de perman\u00eancia no metal fundido \u00e9 maior. Isso garante uma grande \u00e1rea de contato entre as bolhas de g\u00e1s inerte e o metal fundido, assegurando, assim, um coeficiente de transfer\u00eancia de massa mais elevado em rela\u00e7\u00e3o \u00e0 camada de difus\u00e3o.<\/p>\n

A \u00e1rea de distribui\u00e7\u00e3o das bolhas inertes em toda a se\u00e7\u00e3o transversal do metal fundido tem sido muito ampla.<\/p>\n

O movimento cont\u00ednuo do material fundido acelera a transfer\u00eancia de hidrog\u00eanio para as bolhas inertes.<\/p>\n

As inclus\u00f5es de \u00f3xido e outras inclus\u00f5es n\u00e3o met\u00e1licas s\u00e3o removidas principalmente por flota\u00e7\u00e3o, pois pequenas bolhas inertes se fixam ao \u00f3xido e, em seguida, flutuam at\u00e9 a superf\u00edcie do banho. Os princ\u00edpios que se aplicam \u00e0 remo\u00e7\u00e3o de hidrog\u00eanio tamb\u00e9m se aplicam \u00e0 remo\u00e7\u00e3o de \u00f3xido.<\/p>","protected":false},"excerpt":{"rendered":"

Aluminum foundries have long recognized the need for effective flux gas treatment to remove hydrogen and inclusions. In order to meet these requirements of foundries,…<\/p>","protected":false},"author":1,"featured_media":7295,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[397,118,38,116,106,4369,4367,117,31,92,4370],"class_list":["post-7294","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-aluminium-degassing-process","tag-aluminum-degassing-machine","tag-aluminum-purification-technology","tag-degassing-in-casting","tag-degassing-process","tag-degassing-unit-for-sale","tag-main-components-of-degassing-device","tag-molten-aluminum-degasser","tag-molten-aluminum-refining-degassing","tag-online-degassing-device","tag-rotary-degassing-machine-manufacturer"],"yoast_head":"\nRotary Degassing Technology for Molten Metal Purification<\/title>\n<meta name=\"description\" content=\"The development of rotary degassing technology has brought major 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