{"id":10040,"date":"2021-08-24T07:47:57","date_gmt":"2021-08-24T07:47:57","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=10040"},"modified":"2021-08-24T07:47:57","modified_gmt":"2021-08-24T07:47:57","slug":"metal-degassing-refining","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/metal-degassing-refining\/","title":{"rendered":"Desgaseifica\u00e7\u00e3o e refino de metais"},"content":{"rendered":"

Os m\u00e9todos comuns de refino rotativo para desgaseifica\u00e7\u00e3o de metais s\u00e3o o refino por desgaseifica\u00e7\u00e3o e o refino por pulveriza\u00e7\u00e3o de p\u00f3. O princ\u00edpio consiste em fazer passar g\u00e1s inerte ou agente de refino pela parte inferior do forno.<\/p>\n

O agente refinador<\/a> \u00e9 muito leve, e o g\u00e1s inerte ou o agente de refino come\u00e7a a subir do fundo do forno; o hidrog\u00eanio e as impurezas presentes no alum\u00ednio l\u00edquido s\u00e3o removidos durante o processo de ascens\u00e3o, de modo a alcan\u00e7ar o objetivo de purificar o alum\u00ednio l\u00edquido.<\/p>\n

O unidade de desgaseifica\u00e7\u00e3o<\/a> Utilizado no processo de desgaseifica\u00e7\u00e3o do refino, aciona a placa de flange por meio do motor, e a placa de flange est\u00e1 conectada ao rotor de grafite para girar.<\/p>\n

O efeito de refinamento da pulveriza\u00e7\u00e3o rotativa de p\u00f3 \u00e9 melhor, mas \u00e9 f\u00e1cil que o rotor de grafite fique entupido. Na produ\u00e7\u00e3o, costuma-se utilizar g\u00e1s inerte seco ou nitrog\u00eanio de alta pureza para o refinamento. O g\u00e1s \u00e9 conectado ao flange; o flange come\u00e7a a girar acionado pelo motor; o rotor de grafite gira junto com o flange, a velocidade \u00e9 de 400 a 600 r\/min, e o fluxo de g\u00e1s inerte (arg\u00f4nio) \u00e9 controlado entre 15 e 25 L\/min, enquanto o de nitrog\u00eanio fica entre 20 e 40 L\/min, com press\u00e3o de (0,4 \u00b1 0,1) MPa.<\/p>\n

\"M\u00e9todo<\/p>\n

Processo operacional do equipamento de refinamento por desgaseifica\u00e7\u00e3o rotativa de metais<\/strong><\/p>\n

Primeiro, abra a v\u00e1lvula de g\u00e1s; em seguida, abaixe lentamente o desareador at\u00e9 que a dist\u00e2ncia entre o rotor de grafite do desareador e o fundo da concha seja de 100 a 150 mm; por fim, ligue o motor para iniciar a desgaseifica\u00e7\u00e3o e o refinamento.<\/p>\n

O tempo de refino \u00e9 de 10 a 20 minutos. Para evitar o v\u00f3rtice causado pela rota\u00e7\u00e3o em alta velocidade do rotor de grafite, uma placa defletora \u00e9 colocada em um ou em ambos os lados do rotor de grafite, a fim de reduzir a turbul\u00eancia do alum\u00ednio fundido durante a rota\u00e7\u00e3o. Quando o rotor de grafite est\u00e1 em processo de desgaseifica\u00e7\u00e3o, ele garante que as bolhas sejam pequenas, a dispers\u00e3o seja elevada e o efeito seja bom, de modo que o efeito de desgaseifica\u00e7\u00e3o seja assegurado e as bolhas n\u00e3o rompam a pel\u00edcula de \u00f3xido superficial nem provoquem ebuli\u00e7\u00e3o, evitando assim a inala\u00e7\u00e3o secund\u00e1ria.<\/p>\n

Ap\u00f3s a conclus\u00e3o da desgaseifica\u00e7\u00e3o, desligue o motor, levante o rotor de grafite para afast\u00e1-lo da superf\u00edcie do l\u00edquido e, em seguida, feche a v\u00e1lvula de g\u00e1s.<\/p>","protected":false},"excerpt":{"rendered":"

The common methods of metal degassing rotary refining are degassing refining and powder spraying refining. The principle is to pass inert gas or refining agent…<\/p>","protected":false},"author":1,"featured_media":10041,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[12494,12495],"class_list":["post-10040","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-metal-degassing-refining","tag-rotating-degassing-equipment"],"yoast_head":"\nMetal Degassing Refining, Rotating Degassing Equipment<\/title>\n<meta name=\"description\" content=\"The common methods of metal degassing rotary refining are degassing refining and powder spraying refining. 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