{"id":6559,"date":"2020-11-19T09:36:57","date_gmt":"2020-11-19T09:36:57","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=6559"},"modified":"2020-11-19T09:36:57","modified_gmt":"2020-11-19T09:36:57","slug":"molten-aluminum-degassing-device","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/molten-aluminum-degassing-device\/","title":{"rendered":"Dispositivo de desgaseifica\u00e7\u00e3o de alum\u00ednio fundido"},"content":{"rendered":"

O dispositivo de desgaseifica\u00e7\u00e3o do alum\u00ednio fundido \u00e9 o equipamento fundamental para a purifica\u00e7\u00e3o do alum\u00ednio fundido. Em um sentido mais amplo, trata-se de uma etapa no aprimoramento da qualidade do alum\u00ednio. Atualmente, no caminho rumo aos materiais de alta qualidade, h\u00e1 geralmente v\u00e1rias dire\u00e7\u00f5es b\u00e1sicas, a saber:
\nMaior e com maior capacidade de suportar a carga;
\nMenor e mais preciso
\nMais puro e mais limpo;
\nMelhor do que o desempenho;
\nO alum\u00ednio fundido dispositivo de desgaseifica\u00e7\u00e3o<\/a> \u00e9 um equipamento importante que permite que o material de liga de alum\u00ednio flua nas quatro dire\u00e7\u00f5es acima mencionadas.
\nEmbora o dispositivo de desgaseifica\u00e7\u00e3o seja chamado de dispositivo de desgaseifica\u00e7\u00e3o, ele, na verdade, possui duas fun\u00e7\u00f5es convencionais: desgaseifica\u00e7\u00e3o e forma\u00e7\u00e3o de esc\u00f3ria; al\u00e9m disso, tamb\u00e9m tem a fun\u00e7\u00e3o de remover \u00e1lcalis ap\u00f3s a altera\u00e7\u00e3o da composi\u00e7\u00e3o do material refinado.
\nDeixe-me falar primeiro sobre as fun\u00e7\u00f5es comuns.
\nA desgaseifica\u00e7\u00e3o segue um princ\u00edpio semelhante ao da desgaseifica\u00e7\u00e3o no forno; em circunst\u00e2ncias normais, a diferen\u00e7a de press\u00e3o parcial entre o interior e o exterior da bolha dispersa \u00e9 utilizada para induzir o H presente na massa fundida a entrar na bolha e retir\u00e1-lo da massa fundida. Essas bolhas s\u00e3o geralmente compostas por g\u00e1s N\u2082 ou Ar. Utilizando o mesmo material de refino (como N\u2082, Ar, Cl\u2082, CCl\u2084, fundente etc.), o efeito do dispositivo de desgaseifica\u00e7\u00e3o \u00e9 significativamente melhor do que o efeito de refino no forno, pois a estrutura dos dois \u00e9 diferente.<\/p>\n

Os fornos geralmente cont\u00eam dezenas de toneladas de alum\u00ednio, e o efeito de difus\u00e3o das bolhas durante o refino dificulta o tratamento de todos os recantos e cantos; o dispositivo de desgaseifica\u00e7\u00e3o \u00e9 um ponto de controle no trajeto que a massa fundida deve percorrer, e toda a massa fundida que por ele passa deve ser tratada.<\/p>\n

\"Dispositivo<\/p>\n

H\u00e1 tamb\u00e9m um dispositivo de desgaseifica\u00e7\u00e3o instalado no canal de vazamento (denominado ACD). V\u00e1rios rotores est\u00e3o distribu\u00eddos ao longo da dire\u00e7\u00e3o do fluxo da massa fundida. A subst\u00e2ncia refinada se difunde na massa fundida atrav\u00e9s do rotor, intercepta as camadas de H presentes na massa fundida e realiza a desgaseifica\u00e7\u00e3o. Diz-se que o efeito \u00e9 satisfat\u00f3rio, mas, em geral, a desgaseifica\u00e7\u00e3o do tipo caixa, por meio do projeto de c\u00e2mara interna, oferece maior controle sobre o trajeto do fluxo da massa fundida e tamb\u00e9m evita os efeitos adversos da queda na temperatura do alum\u00ednio fundido durante a fase inicial da fundi\u00e7\u00e3o; al\u00e9m disso, o efeito de desgaseifica\u00e7\u00e3o \u00e9 mais est\u00e1vel e confi\u00e1vel.<\/p>\n

O princ\u00edpio da forma\u00e7\u00e3o de esc\u00f3ria e da desgaseifica\u00e7\u00e3o no forno \u00e9 o mesmo. Como o efeito de dispers\u00e3o \u00e9 melhor, o efeito de adsor\u00e7\u00e3o e remo\u00e7\u00e3o de esc\u00f3ria ser\u00e1 melhor. No entanto, o dispositivo de desgaseifica\u00e7\u00e3o n\u00e3o \u00e9 o principal meio utilizado para remover a esc\u00f3ria. Se a massa fundida no forno n\u00e3o for processada adequadamente, a carga sobre a caixa de desgaseifica\u00e7\u00e3o aumentar\u00e1, e a efici\u00eancia da remo\u00e7\u00e3o de esc\u00f3ria aumentar\u00e1, mas a qualidade geral da massa fundida diminuir\u00e1 e o rotor sofrer\u00e1 desgaste. Aumentar a velocidade n\u00e3o \u00e9 ben\u00e9fico para a qualidade e a efici\u00eancia.<\/p>","protected":false},"excerpt":{"rendered":"

The molten aluminum degassing device is the key equipment for the purification of aluminum melt. In a great sense, it is a step in the…<\/p>","protected":false},"author":1,"featured_media":6599,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[138],"tags":[],"class_list":["post-6559","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-seo"],"yoast_head":"\nMolten Aluminum Degassing Device -sales@alalloycasting.com<\/title>\n<meta name=\"description\" content=\"The molten aluminum degassing device is the key equipment for the aluminum purification. 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