Gasification of waste printed circuit boards (PCB) in molten salts: Ⅲ Experimental study on metal distribution and recovery
废弃印刷线路板熔融盐气化特性：Ⅲ金属分布与回收实验

Experiments on PCB waste gasification were carried out in a molten salt reactor to separate and recycle the metallic and other inorganic material from PCB waste. The detention and distribution of metals during the molten salt gasification process were investigated. The results show that over 90% Cu, Al, Ca, Cd, Co, Mg, Sb, Sn, and Zn were detained in the molten salt. Most of the detained metals were distributed in the bottom layers of the molten salt; over 90% Al, Cu, Co, Sb, Sn, and over 70% Mg, Pb and Se were detained at the bottom layers. Other inorganic materials, such as glass fiber, were also detained in the molten salt but in the top layers, thus a rich metallic fraction could be recycled by collecting and dealing with the bottom layers of the molten salt. The materials recycled from the bottom layers contained 92.76 wt% metals, of which 78.06 wt% was Cu and 9.89 wt% was Al.