A method for refining sulfidic copper concentrate , wherein the method comprising feeding sulfidic copper concentrate and oxygen-bearing reaction gas and slag forming material into a reaction shaft of a suspension smelting furnace by means of a burner that is arranged on top of the reaction shaft of the suspension smelting furnace , whereby sulfidic copper concentrate and oxygen-bearing reaction gas and slag forming material react in the reaction shaft of the suspension smelting furnace into blister copper and slag , collecting slag and blister copper in a settler of the suspension smelting furnace to in the settler of the suspension smelting furnace form a blister layer containing blister copper and a slag layer containing slag on top of the blister layer , and discharging slag in unreduced state and blister copper separately from the settler of the suspension smelting furnace , so that slag in unreduced state is fed into an electric furnace , characterized by feeding a part of the sulfidic copper concentrate into the electric furnace , by reducing the slag , that is fed in unreduced state from the suspension smelting furnace , in the electric furnace at least partly with the sulfidic copper concentrate that is fed into the electric furnace to in the electric furnace form a matte layer containing copper matte and an electric furnace slag layer containing electric furnace slag on top of the matte layer , by discharging electric furnace slag and matte copper separately from the electric furnace , by granulating and treating the copper matte that is discharged from the electric furnace to obtain copper matte feed material , and by feeding at least a part of said copper matte feed material into the reaction shaft of the suspension smelting furnace by means of the burner . feeding sulfidic copper concentrate and oxygen-bearing reaction gas and slag forming material into a reaction shaft of a suspension smelting furnace by means of a burner that is arranged on top of the reaction shaft of the suspension smelting furnace , whereby sulfidic copper concentrate and oxygen-bearing reaction gas and slag forming material react in the reaction shaft of the suspension smelting furnace into blister copper and slag , collecting slag and blister copper in a settler of the suspension smelting furnace to in the settler of the suspension smelting furnace form a blister layer containing blister copper and a slag layer containing slag on top of the blister layer , and discharging slag in unreduced state and blister copper separately from the settler of the suspension smelting furnace , so that slag in unreduced state is fed into an electric furnace , characterized by feeding a part of the sulfidic copper concentrate into the electric furnace , by reducing the slag , that is fed in unreduced state from the suspension smelting furnace , in the electric furnace at least partly with the sulfidic copper concentrate that is fed into the electric furnace to in the electric furnace form a matte layer containing copper matte and an electric furnace slag layer containing electric furnace slag on top of the matte layer , by discharging electric furnace slag and matte copper separately from the electric furnace , by granulating and treating the copper matte that is discharged from the electric furnace to obtain copper matte feed material , and by feeding at least a part of said copper matte feed material into the reaction shaft of the suspension smelting furnace by means of the burner . <EOS>