Method for producing blister copper directly from copper concentrate

摘要

A method for producing blister copper directly from copper concentrate is provided, comprising: a) adding copper concentrate, copper matte, slagging material, oxygen enriched air, endothermic material to an upper segment of the reaction furnace; b) adding reducing agent to the lower segment space of the reaction furnace; c) directing the produced hot coke and liquid slag into an electric furnace, and adding copper concentrate into the electric furnace to generate an electric furnace slag and copper matte; d) the copper matte being granulated and finely ground, then re-fed into the reaction furnace.

主权项

1. 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.