ABSTRACT
Converting reaction is the transformation of a metal sulfide into metal by the action of air or oxygen. Conversion of Cu2S is conducted in the converter and immediately follows the purification of the matte. Copper produced in the converter is known as "blister copper". The name is derived from the fact that on cooling, dissolved SO2 is released thus causing the formation of "blisters" on the surface. Noranda Process This process was developed in Quebec by Noranda Company. The reactor is similar to a conventional Peirce-Smith converter with the exception of the raised hearth in the slag reduction and settling zone. To solve the problems encountered in converting Ni3S2, means have to be provided to mix the nickel oxide intimately in the sulfide phase to prevent its slagging, and to have as high a temperature as possible in the bath to keep metallic nickel in the molten state.
