Abstract
The metal in the shredder dust, which is produced from scrapped automobiles and home electric appliances by shredding and sorting, is mainly composed of iron and copper. It is more desirable to reuse it as ferrous and cupreous resources by separating and recovering iron and copper. The Fe–Cu binary system has a single liquid phase in molten state. On the other hand, it is reported that by carbon, phosphorus or silicon addition, two liquid phases separation of iron and copper occurs. In the present work, the two liquid phases separation is studied in the Fe–Cu–B system, and the boron addition is found to be more effective for the phase separation. From the equilibrium relation of the phase separation at 1873 K, the first-order and the second-order interaction parameters of boron for copper in molten iron have been derived as follows:
eBCu(in Fe)=0.18(±0.01) ([mass%B]<3.3)
rBCu(in Fe)=−0.015(±0.001)
