The amount of impurities, such as Pb, Sn, Sb, Bi, had increased in the copper smelting process of JX Nippon Mining & Metals Group, because of its active recycling from the urban-mine. Accordingly, it became a critical issue to bleed off such impurities from its Cu smelting circuit and recover them as products. The company constructed the plant to treat the residues from Cu smelters in the Hitachi Works in 2008. The plant, named as HMC (Hitachi Metal-Recycling Complex), has been playing an important role to bleed off and recover 11 kinds of precious metals & impurity elements, and to stabilize the Cu smelting operation with recycling activities. This report describes about the role of HMC process, especially on Pb and Sb recovery.