Patent ID: 6293993
Filing Date: 2001-09-25
Classification: C22B,Y02P

Abstract:
Recycling process for zinc-rich solid waste containing zinc oxide, Cu oxides and impurities normally present in brass, comprising the steps of:a) forming a mixture of the waste with a finely divided solid reducing agent and a binder;b) compacting the mixture as agglomerates with open pores;c) adding the agglomerates into a treatment reactor containing a bath of liquid copper or brass metal, in which the zinc and copper oxides are reduced;d) obtaining in the treatment reactor after the reduction, a new brass in liquid form and a new waste;e) transferring the new liquid brass into a fusion and casting furnace, and optionally adjusting its composition therein;f) casting the new liquid brass in the casting furnace to form a product; andg) recovering any waste present in the treatment reactor and the casting furnace and recycling said waste according to said steps a to f.