fluxo de cobertura<\/a> pode cobrir a superf\u00edcie do alum\u00ednio e das ligas de alum\u00ednio fundidos no estado l\u00edquido. Os sais de cloreto e de fl\u00faor, comumente utilizados, apresentam um ponto de fus\u00e3o mais elevado do que o alum\u00ednio e as ligas de alum\u00ednio. Portanto, um sal misto que possa estar em estado eut\u00e9tico ou em estado de solu\u00e7\u00e3o s\u00f3lida \u00e9 selecionado como fundente. O cloreto de s\u00f3dio e o cloreto de pot\u00e1ssio podem formar um sal eut\u00e9tico fus\u00edvel.<\/p>\n![\"Fluxos](\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2021\/07\/Fluxes-for-Aluminum-Smelter-1.jpg\")
<\/p>\n
O ponto de fus\u00e3o da composi\u00e7\u00e3o eut\u00e9tica de 55% KCl e 45% NlCl \u00e9 de 650 \u2103, o que permite manter o n\u00edvel do l\u00edquido com boa fluidez na temperatura de fus\u00e3o da liga de alum\u00ednio. A densidade do l\u00edquido do sal misto \u00e9 de 1,5 g\/cm\u00b3, o que \u00e9 inferior \u00e0 densidade do alum\u00ednio fundido (2,4\u20132,5 g\/cm\u00b3), permitindo, assim, cobrir melhor a superf\u00edcie das massas fundidas de alum\u00ednio e ligas de alum\u00ednio. O sal bin\u00e1rio apresenta boa estabilidade qu\u00edmica, n\u00e3o reage quimicamente com o alum\u00ednio fundido e possui certa capacidade de dissolver inclus\u00f5es de \u00f3xido de alum\u00ednio e hidrog\u00eanio dos fundidos de alum\u00ednio e ligas de alum\u00ednio. Portanto, o sal misto eut\u00e9tico de cloreto de s\u00f3dio e cloreto de pot\u00e1ssio \u00e9 frequentemente utilizado como componente b\u00e1sico de fundentes para alum\u00ednio e ligas de alum\u00ednio.<\/p>\n
Para melhorar as propriedades do fundente, \u00e9 necess\u00e1rio adicionar ingredientes adicionais. Com base no sal cloreto eut\u00e9tico, pode-se adicionar uma quantidade adequada de sal fluoretado, como fluoreto de s\u00f3dio, fluoreto de c\u00e1lcio, criolita etc., para aumentar a capacidade do fundente de dissolver \u00f3xidos, especialmente a alumina. A adi\u00e7\u00e3o de sal de fluoreto tamb\u00e9m pode aumentar a molhabilidade do fluxo em rela\u00e7\u00e3o \u00e0 alumina, melhorando assim sua capacidade de adsor\u00e7\u00e3o e, ao mesmo tempo, aumentar a tens\u00e3o superficial do fluxo, o que facilita sua separa\u00e7\u00e3o das massas fundidas de alum\u00ednio e ligas de alum\u00ednio, al\u00e9m de reduzir a possibilidade de mistura com o fluxo.<\/p>","protected":false},"excerpt":{"rendered":"
Fluxes for Aluminum Smelter are indispensable auxiliary materials in the smelting process of secondary aluminum smelting process. In addition to being used as a covering…<\/p>","protected":false},"author":1,"featured_media":9733,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-9732","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\n
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