Abstract: Based on the density difference between the components of discarded printed circuit boards, the paper proposes a new process for recovering these metals by enhanced centrifugal field, describes the efficient centrifugal separation system and analyzes the separation mechanism and enhanced recovery system of Falcon separator. Gravity evaluaton indexes are introduced for evaluating the performance of Falcon separator. When Falcon separator was used to treat-0.5mm discarded printed circuit boards, good results were obtained , including an imperfecton value of 0.01, quantitative efficiency of 93.17% and misplaced material content of 4.5%. This process has successfully solved the problem of recovering metal concentrates from -0.5mm discarded printed circuit boards, providing the theoretical basis and technical support of the industrial application of centrifugal separators.

Key words: Enhanced centrifugal field, Metal concentrates, Enhanced centrifugal separation machine