{"id":6070,"date":"2020-10-25T05:33:14","date_gmt":"2020-10-25T05:33:14","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=6070"},"modified":"2020-10-26T03:13:22","modified_gmt":"2020-10-26T03:13:22","slug":"online-degassing-of-molten-aluminum","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/online-degassing-of-molten-aluminum\/","title":{"rendered":"Desgaseifica\u00e7\u00e3o online do alum\u00ednio fundido"},"content":{"rendered":"<p>Atualmente, a desgaseifica\u00e7\u00e3o on-line do alum\u00ednio fundido \u00e9 mais amplamente utilizada para a purifica\u00e7\u00e3o do alum\u00ednio fundido. O equipamento de desgaseifica\u00e7\u00e3o em linha produzido pela AdTech \u00e9 instalado entre o forno e a m\u00e1quina de fundi\u00e7\u00e3o para eliminar o hidrog\u00eanio e outros res\u00edduos contidos no alum\u00ednio fundido e em suas ligas, que afetam sua qualidade e propriedades mec\u00e2nicas. A efici\u00eancia da desgaseifica\u00e7\u00e3o \u00e9 est\u00e1vel, com m\u00e9dia de 60%.<\/p>\n<h2>Desgaseifica\u00e7\u00e3o online do alum\u00ednio fundido<\/h2>\n<p>Para fazer o <a href=\"http:\/\/www.alalloycasting.com\/pt\/online-degassing-system\/\">desgaseifica\u00e7\u00e3o online<\/a> Para trabalhar com alum\u00ednio fundido de forma est\u00e1vel e eficiente, \u00e9 preciso prestar aten\u00e7\u00e3o aos seguintes pontos:<\/p>\n<p>A unidade de desgaseifica\u00e7\u00e3o deve apresentar boa estanqueidade, ser menos afetada pelas condi\u00e7\u00f5es clim\u00e1ticas, produzir menos esc\u00f3ria e n\u00e3o gerar polui\u00e7\u00e3o secund\u00e1ria. Quando a c\u00e2mara de desgaseifica\u00e7\u00e3o n\u00e3o est\u00e1 bem vedada, o vapor de \u00e1gua presente no ar penetra facilmente no forno, causando a absor\u00e7\u00e3o de hidrog\u00eanio. As primeiras unidades de desgaseifica\u00e7\u00e3o utilizavam principalmente nitrog\u00eanio de alta pureza como g\u00e1s de cobertura para reduzir a absor\u00e7\u00e3o de hidrog\u00eanio, mas esse g\u00e1s tamb\u00e9m \u00e9 afetado pelas condi\u00e7\u00f5es clim\u00e1ticas at\u00e9 certo ponto. Portanto, a fim de melhorar a efici\u00eancia da desgaseifica\u00e7\u00e3o e reduzir a influ\u00eancia do clima, o equipamento de desgaseifica\u00e7\u00e3o deve possuir uma boa veda\u00e7\u00e3o.<\/p>\n<p>As bolhas na caixa de desgaseifica\u00e7\u00e3o devem estar finamente dispersas e uniformes, e n\u00e3o deve haver grandes oscila\u00e7\u00f5es no n\u00edvel do l\u00edquido. Quando o vaz\u00e3o total e a press\u00e3o do g\u00e1s de processo na m\u00e1quina de desgaseifica\u00e7\u00e3o permanecem inalterados, quanto maior o n\u00famero de bolhas, maior ser\u00e1 a \u00e1rea de contato entre o g\u00e1s de processo e a massa fundida. Portanto, quanto menores forem as bolhas (o que equivale a um maior n\u00famero de bolhas) e quanto maior for a dispers\u00e3o das bolhas, maior ser\u00e1 a \u00e1rea de contato, o que favorece a difus\u00e3o do hidrog\u00eanio para o g\u00e1s de processo, alcan\u00e7ando assim o objetivo de remo\u00e7\u00e3o do hidrog\u00eanio. O rotor deve ter pot\u00eancia de agita\u00e7\u00e3o suficiente para que as bolhas atinjam velocidade de movimento adequada para dispersar todo o banho fundido; no entanto, uma velocidade excessiva do rotor far\u00e1 com que a superf\u00edcie do l\u00edquido ondule, podendo fazer com que a esc\u00f3ria retorne ao banho fundido.<\/p>\n<p>A estrutura do rotor da unidade de desgaseifica\u00e7\u00e3o deve possuir pot\u00eancia de agita\u00e7\u00e3o suficiente. A haste do rotor e o impulsor do rotor devem ter uma estrutura adequada; \u00e9 necess\u00e1rio aumentar adequadamente o di\u00e2metro do impulsor e combin\u00e1-lo com uma velocidade apropriada para aumentar a for\u00e7a de agita\u00e7\u00e3o do rotor.<\/p>\n<p>O g\u00e1s de processo deve ter alta pureza, e n\u00e3o \u00e9 poss\u00edvel formar esc\u00f3ria nem absorver hidrog\u00eanio da massa fundida. Geralmente, o controle da pureza do g\u00e1s de processo se divide em duas partes principais: uma \u00e9 o controle da fonte de g\u00e1s e a outra \u00e9 o controle de vazamentos em todas as tubula\u00e7\u00f5es e instrumentos pelos quais o g\u00e1s passa. Normalmente, exige-se que a pureza da fonte de g\u00e1s de processo atinja 99,999%, com teor de \u00e1gua inferior a 4 \u00d7 10\u207b\u2076 e teor de oxig\u00eanio inferior a 5 \u00d7 10\u207b\u2076. Teores excessivos de \u00e1gua e oxig\u00eanio no g\u00e1s de processo causar\u00e3o a forma\u00e7\u00e3o de esc\u00f3ria e a absor\u00e7\u00e3o de hidrog\u00eanio.<\/p>\n<p>Para garantir que o material fundido tenha tempo de perman\u00eancia suficiente no dispositivo de desgaseifica\u00e7\u00e3o, \u00e9 necess\u00e1rio um determinado volume do banho de fus\u00e3o. O rotor da unidade de desgaseifica\u00e7\u00e3o deve estar imerso no material fundido a uma determinada profundidade. A profundidade de imers\u00e3o do rotor est\u00e1 diretamente relacionada \u00e0 capacidade de todo o banho fundido ser completamente coberto pelo g\u00e1s de processo, o que tem um impacto mais evidente na efici\u00eancia da desgaseifica\u00e7\u00e3o. Geralmente, a profundidade de imers\u00e3o do rotor e do impulsor deve ser superior a 500 mm, e a dist\u00e2ncia entre o impulsor e o fundo do banho fundido deve ser de 50 a 100 mm.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6072\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/10\/Online-Degassing-of-Molten-Aluminum.jpg\" alt=\"Desgaseifica\u00e7\u00e3o online do alum\u00ednio fundido\" width=\"400\" height=\"500\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/10\/Online-Degassing-of-Molten-Aluminum.jpg 400w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/10\/Online-Degassing-of-Molten-Aluminum-240x300.jpg 240w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/p>\n<p>O <a href=\"http:\/\/www.alalloycasting.com\/pt\/degassing-unit\/\">unidade de desgaseifica\u00e7\u00e3o<\/a> \u00c9 necess\u00e1rio que apresente bom desempenho de isolamento e baixa temperatura da parede do forno. Geralmente, a capacidade instalada do forno na unidade de desgaseifica\u00e7\u00e3o \u00e9 de cerca de 550 a 650 kg.<br \/>\nCalculado com uma produtividade hor\u00e1ria de 2 t, o tempo de perman\u00eancia do alum\u00ednio fundido no forno \u00e9 de cerca de 15 minutos. Se o desempenho de reten\u00e7\u00e3o de calor do sistema de desgaseifica\u00e7\u00e3o for insatisfat\u00f3rio, \u00e9 necess\u00e1rio aumentar a pot\u00eancia de aquecimento do equipamento de desgaseifica\u00e7\u00e3o ou elevar a temperatura do forno de reten\u00e7\u00e3o, a fim de garantir a temperatura da caixa frontal. O aumento da temperatura elevar\u00e1 significativamente a solubilidade do hidrog\u00eanio e aumentar\u00e1 a capacidade de absor\u00e7\u00e3o de hidrog\u00eanio do metal fundido. Portanto, essas duas medidas aumentar\u00e3o o teor de hidrog\u00eanio do metal fundido. Por isso, a unidade de desgaseifica\u00e7\u00e3o deve possuir bom desempenho de isolamento, e a temperatura da parede do forno \u00e9 geralmente inferior a 75 \u00b0C.<\/p>\n<p>O revestimento do forno e o alum\u00ednio devem estar secos e ser f\u00e1ceis de limpar. O revestimento da unidade de desgaseifica\u00e7\u00e3o geralmente requer materiais refrat\u00e1rios que n\u00e3o estejam em contato com o alum\u00ednio, apresentem desempenho est\u00e1vel, n\u00e3o adicionem g\u00e1s \u00e0 massa fundida, sejam resistentes \u00e0 sinteriza\u00e7\u00e3o em altas temperaturas e n\u00e3o sejam propensos ao ac\u00famulo de esc\u00f3ria.<\/p>\n<p>As medidas acima garantem o funcionamento est\u00e1vel do equipamento de desgaseifica\u00e7\u00e3o. Em condi\u00e7\u00f5es normais, a efici\u00eancia de desgaseifica\u00e7\u00e3o deve atingir mais de 50%. Preste aten\u00e7\u00e3o \u00e0s medi\u00e7\u00f5es e verifica\u00e7\u00f5es di\u00e1rias e, caso seja detectada qualquer anomalia, verifique o equipamento e tome as medidas necess\u00e1rias.<\/p>","protected":false},"excerpt":{"rendered":"<p>At present, the online degassing of molten aluminum is more widely used for molten aluminum purification. The on-line degassing equipment produced by AdTech is installed&hellip;<\/p>","protected":false},"author":1,"featured_media":6072,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[4888,4896,4909,4891,4910,4890,4889,4898,4915,4914,4913,4912,4905,4893,4907,4899,4901,4902,4881,4883,4880,4892,4900,4882,4874,4876,4875,4879,4878,4877,4884,4885,4887,4906,4908,4904,4903,4897,4894,4886,4911,4895],"class_list":["post-6070","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-online-degassing-of-molten-aluminum-in-career-opportunities-dubal","tag-online-degassing-of-molten-aluminum-in-deepak-dubal","tag-online-degassing-of-molten-aluminum-in-dubai-aluminium-dubal-careers","tag-online-degassing-of-molten-aluminum-in-dubai-aluminium-dubal-careers-jobs","tag-online-degassing-of-molten-aluminum-in-dubai-aluminium-co-ltd-dubal","tag-online-degassing-of-molten-aluminum-in-dubai-aluminium-company","tag-online-degassing-of-molten-aluminum-in-dubai-aluminium-company-limited","tag-online-degassing-of-molten-aluminum-in-dubai-aluminium-company-ltd-v-salaam-and-others","tag-online-degassing-of-molten-aluminum-in-dubai-aluminum-co-ltd-v-salaam","tag-online-degassing-of-molten-aluminum-in-dubai-aluminum-company-dubal","tag-online-degassing-of-molten-aluminum-in-dubai-aluminum-company-limited-dubal","tag-online-degassing-of-molten-aluminum-in-dubai-aluminum-company-ltd-dubal","tag-online-degassing-of-molten-aluminum-in-dubal-dubai-aluminium-company-limited","tag-online-degassing-of-molten-aluminum-in-dubal-local-business","tag-online-degassing-of-molten-aluminum-in-dubal-dubai-aluminium-co","tag-online-degassing-of-molten-aluminum-in-dubal-aluminium-career","tag-online-degassing-of-molten-aluminum-in-dubal-aluminium-company-dubai","tag-online-degassing-of-molten-aluminum-in-dubal-aluminium-driver-jobs","tag-online-degassing-of-molten-aluminum-in-dubal-aluminium-dubai","tag-online-degassing-of-molten-aluminum-in-dubal-aluminium-jebel-ali","tag-online-degassing-of-molten-aluminum-in-dubal-aluminium-jobs","tag-online-degassing-of-molten-aluminum-in-dubal-aluminium-jobs-in-dubai","tag-online-degassing-of-molten-aluminum-in-dubal-aluminium-suggestion-scheme","tag-online-degassing-of-molten-aluminum-in-dubal-aluminium-website","tag-online-degassing-of-molten-aluminum-in-dubal-aluminum-agency","tag-online-degassing-of-molten-aluminum-in-dubal-aluminum-company-ltd","tag-online-degassing-of-molten-aluminum-in-dubal-aluminum-job-vacancies","tag-online-degassing-of-molten-aluminum-in-dubal-aluminum-map","tag-online-degassing-of-molten-aluminum-in-dubal-aluminum-smelter","tag-online-degassing-of-molten-aluminum-in-dubal-aluminum-uae","tag-online-degassing-of-molten-aluminum-in-dubal-america-inc","tag-online-degassing-of-molten-aluminum-in-dubal-america-st-louis-mo","tag-online-degassing-of-molten-aluminum-in-dubal-california","tag-online-degassing-of-molten-aluminum-in-dubal-dubai-aluminium","tag-online-degassing-of-molten-aluminum-in-dubal-dubai-aluminium-company","tag-online-degassing-of-molten-aluminum-in-dubal-dubai-aluminium-company-ltd","tag-online-degassing-of-molten-aluminum-in-dubal-dubai-aluminium-company-uae","tag-online-degassing-of-molten-aluminum-in-dubal-lab","tag-online-degassing-of-molten-aluminum-in-dubal-reviews","tag-online-degassing-of-molten-aluminum-in-dubal-salary","tag-online-degassing-of-molten-aluminum-in-jobs-in-dubal-dubai-aluminium","tag-online-degassing-of-molten-aluminum-in-working-at-dubal"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Online Degassing of Molten Aluminum | Degassing Unit<\/title>\n<meta name=\"description\" content=\"Online degassing of molten aluminum is more widely used for molten aluminum purification. 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