Method for producing blister copper directly from copper concentrate

A method for producing blister copper directly from copper concentrate, characterized in that it comprises the following steps:

• a) feeding copper concentrate, copper matte, slagging material, oxygen enriched air, and endothermic material together into a reaction furnace at an upper segment of the reaction furnace;
• b) feeding reducing agent into the reaction furnace at the lower segment of the reaction furnace, wherein furnace gas, a hot coke layer in solid state, a slag layer in liquid state, and a blister copper layer in liquid state are formed in a molten bath at the bottom of the reaction furnace;
• c) directing the hot coke and the slag in liquid state into an electric furnace while feeding sulfidizing agent into the electric furnace, so as to produce an electric furnace slag and copper matte in the electric furnace;
• d) granulating the copper matte and re-feeding it into the reaction furnace at the upper segment of the reaction furnace,
• wherein the sulfidizing agent in step c) is sulfide copper concentrate with a moisture content of 4% by weight to 10% by weight, the mass ratio of said sulfide copper concentrate to said slag in liquid state is 4˜6:1.