HINT: The chemical formula of copper matte is Cu2S+FeS.
When copper ore is mixed with silica in a reverberatory furnace copper matte is produced. The copper matte contains sulphide of copper(l) and iron(ll).
Copper matte Cu2S and FeS
Matte is a process in which copper is extracted before the final reduction. when a hot blast of air is blown through a molten matte placed in a silica lined converter, FeS of the matte oxidizes to FeO.
The air is blown through the molten matte. Blast of air converts Cu2S partly into Cu2O which reacts with remaining Cu2S to give molten copper.