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模拟废弃电路板破碎、分选后得到的多金属富集粉末,通过单因素实验和正交试验,采用低温碱性熔炼研究熔炼温度、熔炼时间和盐料质量比对其中有价金属分离提取率的影响.结果表明,最佳条件为熔炼温度400℃,熔炼时间1.5h,盐料质量比3.5,其中盐料质量比对两性金属提取率影响最显著.在最佳条件下,两性金属提取率为Sn 83.6%、Al 92.7%、Zn80.9%及Sb 34.5%,以可溶盐形式富集在浸出液中,铜等其他成分则于渣中富集,有效实现了两性金属与其他金属的分离.
Simulation of waste circuit board crushing, separation of multi-metal-rich powder obtained by single factor experiments and orthogonal experiments, the use of low-temperature alkaline smelting melting temperature, melting time and salting quality of the metal separation and extraction rate .The results showed that the optimum conditions were melting temperature 400 ℃, melting time 1.5h, salt mass ratio 3.5, of which salt mass ratio had the most significant effect on the extraction rate of amphoteric metals.At the optimum conditions, the extraction rate of amphoteric metals It is Sn 83.6%, Al 92.7%, Zn 80.9% and Sb 34.5%. It is enriched in leaching solution as a soluble salt and other components such as copper are enriched in the slag, thus effectively separating the amphoteric metal from other metals .