METHOD FOR BLOWING INTO BLAST FURNACE

PURPOSE:To reduce wear, clogging, etc., of piping, etc., and to surely lower Si% in pig iron by mixing and blowing the specific volatile matter of fine powdered coal and CaO-MgO series flux from tuyere in a blast furnace. CONSTITUTION:The fine powdered coal and the CaO-MgO series flux are mixed and blown from the tuyere in the blast furnace. By this method, coke ratio is lowered and also while reducing wear, clogging, etc., of the piping, nozzle, etc., caused by the flux, the content of Si in the pig iron is lowered. In the above blowing method of the flux into the blast furnace, the fine powdered coal having