Mixture gas, and method and apparatus for purifying aluminum alloy melt using the same

The invention relates to a mixed gas, and a method and a device for purifying aluminum alloy melts by using the mixed gas. The the mixed gas comprises the components with the following volume concentration percentages: N2+Ar: 75 percent to 85 percent, CO+Cl2: 15 percent to 25 percent, wherein, Ar/N2...

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Hauptverfasser: WU JIANGMING, GAO PING, XIAO JUNBIAO, SUN TINGFU, LI ZHIGANG, MI JIANGUO, JIAN SHAOTING, DI SHILEI, LI JINJUN, DU QISHENG, ZHANG WENBO
Format: Patent
Sprache:chi ; eng
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Zusammenfassung:The invention relates to a mixed gas, and a method and a device for purifying aluminum alloy melts by using the mixed gas. The the mixed gas comprises the components with the following volume concentration percentages: N2+Ar: 75 percent to 85 percent, CO+Cl2: 15 percent to 25 percent, wherein, Ar/N2: 1/3 to 1/2; Cl2/CO: 1/8 to 1/9. The method comprises: the mixed gas enters a degassing head and a nozzle through a guide tube and then is introduced into the aluminum alloy melts for degassing and purifying treatment; the degassing and purifying treatment utilizes one of the three treatment methods, such as in-furnace refining treatment, online refining treatment outside furnace and online refining combined treatment outside furnace. The method has the advantages: the technology of the mixed gas overcomes various damages caused by high chlorine treatment and has the characteristics of low cost and good degassing and purifying effects; and the device is low in cost, high in degassing and purifying effects, conveni