PURPOSE:To efficiently process Ni-Cd battery waste under a condition generating no public nuisance by charging the Ni-Cd battery waste in pig iron held to a molten state and receiving a volatilized substance to recover a metal Cd as well as Ni as an Fe-Ni alloy. CONSTITUTION:Pig iron or steel is held in a molten state using an arc electric furnace or induction heating electric furnace. Ni-Cd battery waste or Ni-Cd battery waste having a reducing agent such as a coke powder compounded therewith is preliminarily formed into a pellet or briquet-shaped lumpy substance. This lumpy substance is charged in pig iron or steel held in the aforementioned molten state and metal Cd is recovered as a volatilized substance while Ni is recovered as an Fe-Ni alloy. As a result, the Ni-Cd battery waste can be efficiently processed under a condition generating no public nuisance.
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