METHOD FOR PARTIAL ROASTING OF COPPER, NICKEL AND/OR GOLD BEARING CONCENTRATES

摘要

The invention concerns a process for removing arsenic and/or antimony sulfides from copper, nickel and/or gold containing ore particles. Ore particles are fed into a reactor, wherein a fluidizing gas is injected into the reactor to form a fluidized bed containing at least a portion of the ore particles. The ore particles are heated in the presence of inert particles to a temperature between 500 and 850°C and are withdrawn from the reactor. At least 60 wt.% of the inert particles form a first zone of the fluidized bed and at least 60 wt.% of the ore particles form a second zone above the first zone.