fluxo de alum\u00ednio fundido<\/a> Na ind\u00fastria de alum\u00ednio secund\u00e1rio, \u00e9 poss\u00edvel melhorar a taxa de recupera\u00e7\u00e3o direta do alum\u00ednio durante o processo de refundi\u00e7\u00e3o. O alum\u00ednio e a sucata de alum\u00ednio, como a utilizada em embalagens de bebidas, s\u00e3o processados dessa forma. O alum\u00ednio \u00e9 refundido no forno sob a cobertura de uma camada de sal fundido para impedir que o alum\u00ednio se oxide na atmosfera do forno e promover a coalesc\u00eancia do alum\u00ednio fundido, de modo a maximizar a recupera\u00e7\u00e3o do alum\u00ednio. Durante o processamento, tende a se formar uma pel\u00edcula de \u00f3xido na superf\u00edcie das got\u00edculas de alum\u00ednio fundido. A pel\u00edcula de \u00f3xido inibe a coalesc\u00eancia do alum\u00ednio fundido, resultando na perda de part\u00edculas menores no processo e, consequentemente, reduzindo a quantidade de alum\u00ednio recuperado. As got\u00edculas de alum\u00ednio n\u00e3o recuper\u00e1veis com pel\u00edculas de \u00f3xido s\u00e3o, \u00e0s vezes, chamadas de esc\u00f3ria.<\/p>\nO uso de fluxo salino no forno ajuda a descascar e suspender a pel\u00edcula de \u00f3xido, aumentando assim a coalesc\u00eancia das got\u00edculas e reduzindo a forma\u00e7\u00e3o de esc\u00f3ria de estanho. O fluxo salino umedece a pel\u00edcula de \u00f3xido e inicia sua desintegra\u00e7\u00e3o, descascando-a da superf\u00edcie da gota de alum\u00ednio fundido. Os fragmentos da pel\u00edcula de \u00f3xido desprendidos do alum\u00ednio permanecem suspensos no fluxo. As got\u00edculas de alum\u00ednio com densidade superior \u00e0 do fluxo formam, ent\u00e3o, uma camada fundida cont\u00ednua sob a camada de fluxo. Esse fluxo tamb\u00e9m pode impedir a forma\u00e7\u00e3o de mais \u00f3xido, evitando que o metal seja afetado pela atmosfera do forno.<\/p>\n
![\"Fluxos](\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/12\/AdTech-Refining-Fluxes-1.jpg\")
<\/p>\n
O fluxo de sal t\u00edpico \u00e9 composto principalmente por uma mistura de cloreto de s\u00f3dio e cloreto de pot\u00e1ssio de alta pureza. O sal de alta pureza utilizado nesse tipo de processo \u00e9 extra\u00eddo e purificado da solu\u00e7\u00e3o por meio de m\u00e9todos complexos e altamente desenvolvidos, o que pode elevar o pre\u00e7o do sal. Portanto, embora os efeitos nocivos das impurezas de sulfato originalmente presentes nesses sais de metais alcalinos possam ser evitados por meio da purifica\u00e7\u00e3o, o uso de sais de alta pureza pode ser bastante caro.<\/p>\n
\u00c9 recomend\u00e1vel minimizar as impurezas de sulfato no sal, pois essas impurezas atuam como um agente oxidante, o que contribui para a forma\u00e7\u00e3o de uma pel\u00edcula de \u00f3xido na superf\u00edcie do alum\u00ednio fundido.<\/p>\n
A pel\u00edcula formada por essas rea\u00e7\u00f5es resulta em uma perda de peso do metal. Al\u00e9m disso, a forma\u00e7\u00e3o de \u00f3xidos e sulfetos aumenta a forma\u00e7\u00e3o de esc\u00f3ria. Portanto, embora o sal de pureza padr\u00e3o possa ser mais barato do que o sal de alta pureza, quando se utiliza o sal de pureza padr\u00e3o, a taxa de recupera\u00e7\u00e3o do alum\u00ednio ser\u00e1 bastante reduzida devido aos efeitos prejudiciais das impurezas de sulfato.<\/p>","protected":false},"excerpt":{"rendered":"
AdTech refining fluxes are used to remelt molten aluminum, thereby improving metal recovery. AdTech refining fluxes are mainly used to improve the recovery rate of…<\/p>","protected":false},"author":1,"featured_media":6997,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[138],"tags":[136,4326,644,4494,4327,4324,4323,4325,833,123],"class_list":["post-6996","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-seo","tag-deslagging-agent","tag-dross-reduction","tag-molten-aluminum-refining","tag-multi-function-molten-aluminium-casting-refining-flux","tag-multi-function-refining-flux","tag-refine-agent","tag-refine-flux","tag-refiner","tag-refining-agent","tag-refining-flux"],"yoast_head":"\n
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