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

The above mentioned invention describes 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, whereina 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 The ore particles are heated in the presence of inert particles to a temperature between 500 and 850 degrees and are withdrawn from the reactor.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. 上述发明描述了从含有铜、镍和/或金的矿石颗粒中除去砷和/或锑的硫化物的方法。将矿石颗粒进料到反应器中，其中将流化气体注入反应器中以形成含有至少部分该矿石颗粒的流化床。将该矿石颗粒在惰性颗粒存在下加热到500和850℃之间的温度，并从该反应器中排出。至少60重量％的该惰性颗粒形成该流化床的第区域，和至少60重量％的该矿石颗粒在该第区域上方形成第二区域。