CAJ | 학술논문

研究低温碱性熔炼过程中废弃电路板多金属粉末有价金属的元素行为，在熔炼过程中，Sn、Pb、Zn 等两性金属与碱及氧化剂反应生成相应的可溶性碱金属钠盐，通过水浸实现与其他金属分离，取得良好的转化效果。探索了氧化剂用量、碱用量、熔炼温度、熔炼时间、液固比、浸出温度、浸出时间等7个因素对金属转化率的影响，优化得到较为适宜的熔体组成与工艺条件：熔体中多金属粉末、NaNO3、NaOH的质量比为1：3.0：3.6，773 K(500℃)条件下熔炼90 min后，冷却粉碎，加水至液固比为9，加热至313K(40℃)浸出60min。在此优化工艺条件下，各金属的转化率依次为Sn 95.93%、Zn 96.63%、Pb 91.21%和Sb 24.68%。
연구저온감성용련과정중폐기전로판다금속분말유개금속적원소행위，재용련과정중，Sn、Pb、Zn 등량성금속여감급양화제반응생성상응적가용성감금속납염，통과수침실현여기타금속분리，취득량호적전화효과。탐색료양화제용량、감용량、용련온도、용련시간、액고비、침출온도、침출시간등7개인소대금속전화솔적영향，우화득도교위괄의적용체조성여공예조건：용체중다금속분말、NaNO3、NaOH적질량비위1：3.0：3.6，773 K(500℃)조건하용련90 min후，냉각분쇄，가수지액고비위9，가열지313K(40℃)침출60min。재차우화공예조건하，각금속적전화솔의차위Sn 95.93%、Zn 96.63%、Pb 91.21%화Sb 24.68%。
The elemental behavior of valuable metals in multi-component metal powder (MMP) originated from waste printed circuit board (PCB) was investigated. The applied method of low-temperature alkaline smelting can convert amphoteric metals Sn, Pb and Zn into soluble sodium salts that can be separated from the other metals in leaching process efficiently. The effects of oxidant and alkaline addition, smelting temperature and time, liquid-solid ratio, leaching temperature and time on the metal conversion rate (R) were investigated. The composition of melt and optimum conditions are obtained as mass ratio of MMP, NaNO3 and NaOH being 1:3.0:3.6, smelting for 90min at 773 K (500℃), leaching for 60min at 313 K (40℃) in water solution (L/S=9). The conversion rates of the metals are as follows:Sn 95.93%, Zn 96.63%, Pb 91.21%, Sb 24.68%.