{"id":11028,"date":"2021-11-03T01:55:31","date_gmt":"2021-11-03T01:55:31","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=11028"},"modified":"2021-11-03T01:55:31","modified_gmt":"2021-11-03T01:55:31","slug":"aluminum-coil-rolling","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/aluminum-coil-rolling\/","title":{"rendered":"Laminagem de bobinas de alum\u00ednio"},"content":{"rendered":"

Na ind\u00fastria de produtos laminados em bobinas de alum\u00ednio, o processo de fundi\u00e7\u00e3o e lamina\u00e7\u00e3o cont\u00ednuas tem sido amplamente utilizado na produ\u00e7\u00e3o de bobinas.<\/p>\n

Na produ\u00e7\u00e3o total mundial de chapas, tiras e folhas de alum\u00ednio, os lingotes laminados a quente representam menos de 20%, enquanto os lingotes de fundi\u00e7\u00e3o cont\u00ednua em rolo duplo, de menor custo, representam mais de 80%.<\/p>\n

A melhoria da qualidade das bobinas de alum\u00ednio fundido e laminado em cont\u00ednuo com dois rolos pode eliminar defeitos como faixas brancas, manchas pretas, gr\u00e3os grandes, rolos grudados e bordas rachadas da chapa fundida e laminada.<\/p>\n

A caracter\u00edstica da tecnologia do processo de fundi\u00e7\u00e3o e lamina\u00e7\u00e3o cont\u00ednuas de bobinas de alum\u00ednio com rolos duplos \u00e9 a produ\u00e7\u00e3o cont\u00ednua e ininterrupta. Qualquer acidente ou partidas e paradas frequentes causadas por quedas de energia far\u00e3o com que a qualidade da chapa fundida e laminada sofra flutua\u00e7\u00f5es. Portanto, \u00e9 muito importante manter a opera\u00e7\u00e3o est\u00e1vel a longo prazo da m\u00e1quina de fundi\u00e7\u00e3o e lamina\u00e7\u00e3o cont\u00ednuas com rolos duplos.<\/p>\n

\u00c9 necess\u00e1rio aprimorar os processos de desgaseifica\u00e7\u00e3o e filtragem do alum\u00ednio fundido, adicionar refinadores de gr\u00e3o e, ao mesmo tempo, refor\u00e7ar o senso de responsabilidade dos operadores.<\/p>\n

\"\"<\/p>\n

O m\u00e9todo de purifica\u00e7\u00e3o do alum\u00ednio fundido no forno s\u00f3 consegue remover as impurezas rec\u00e9m-adicionadas durante o processo de fus\u00e3o, mas n\u00e3o consegue eliminar a contamina\u00e7\u00e3o secund\u00e1ria do alum\u00ednio fundido durante o processo de vazamento. Ao mesmo tempo, devido \u00e0 grande \u00e1rea do forno e \u00e0 pouca profundidade do banho de fus\u00e3o, o refinamento com fundente tem dificuldade em purificar efetivamente o alum\u00ednio fundido em todos os cantos.<\/p>\n

Portanto, no processo moderno de fus\u00e3o e fundi\u00e7\u00e3o, o desgaseifica\u00e7\u00e3o e filtragem online<\/a> Quando se utiliza um m\u00e9todo de tratamento de purifica\u00e7\u00e3o fora do forno, o alum\u00ednio l\u00edquido entra em contato com o fluxo de g\u00e1s na caixa de filtragem de desgaseifica\u00e7\u00e3o e, em seguida, flui para o molde de fundi\u00e7\u00e3o semicont\u00ednua ou para a ponta e o bico de fundi\u00e7\u00e3o cont\u00ednua. Isso garante que todo o alum\u00ednio fundido seja efetivamente purificado e evita a polui\u00e7\u00e3o secund\u00e1ria.<\/p>\n

Ap\u00f3s o tratamento de purifica\u00e7\u00e3o por desgaseifica\u00e7\u00e3o e filtragem em linha, o teor de hidrog\u00eanio do alum\u00ednio fundido pode ser reduzido pelo 60%. Inclus\u00f5es n\u00e3o met\u00e1licas com di\u00e2metros de part\u00edculas inferiores a 50 um podem ser removidas em 50%, e aquelas com di\u00e2metros superiores a 100 um podem ser removidas em 90%.<\/p>","protected":false},"excerpt":{"rendered":"

In the aluminum coil rolled products industry, the continuous casting and rolling process have been widely used in the production of coils. 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