The traditional method of separating bismuth-rich melt produced from the fire smelting of bismuth slags has some imperfections of the complicated operation, low recovery rate of metals and harmful to the environment and human health. As a result of these concerns, a green method for extraction of Bi and Pb from the bismuth-rich melt by super-gravity has been proposed in this study. The extraction mechanism of Bi and Pb was discussed in detail. And influences of the super-gravity field on the separation of bismuth-rich melt were investigated. It can be noted that the Bi solid was difficult to be separated from the liquid phase under a normal-gravity field. In contrast, after centrifugal filtration with optimum conditions of G = 600, T = 130 °C and t = 90 s, the mass-specific gravity for Bi residual of Bi-5wt%Pb and Bi-15wt%Pb melts achieved 87.92% and 63.28%, and the purity of Bi residual could be up to 99.49% and 99.28%. Meanwhile, the removal rate of Pb reached 89.80% and 95.20%, respectively. Therefore, it is a promising technology for green extraction of Bi and Pb from the bismuth-rich melt in terms of the remarkable advantages of high separation efficiency, continuous operation and environmentally friendly.

从铋渣的火冶炼中分离出的富含铋的熔体的传统方法存在一些缺点，即操作复杂，金属回收率低以及对环境和人体健康有害。由于这些问题，本研究提出了一种通过超重力从富铋熔体中萃取Bi和Pb的绿色方法。详细讨论了铋和铅的提取机理。并研究了超重力场对富铋熔体分离的影响。可以注意到，在正重力场下，Bi固体很难从液相中分离出来。相反，经过最佳条件G  = 600的离心过滤后，T  = 130°C和t  = 90 s时，Bi-5wt％Pb和Bi-15wt％Pb熔体的Bi残余物的质量比重分别达到87.92％和63.28％，Bi残余物的纯度可达99.49％和99.28％。同时，Pb的去除率分别达到89.80％和95.20％。因此，从高分离效率，连续操作和环境友好的显着优点来看，这是一种从富铋熔体中绿色萃取铋和铅的技术。