PULVERIZED COAL INJECTION DEVICE FOR BLAST FURNACE AND PULVERIZED COAL INJECTION METHOD INTO BLAST FURNACE

摘要

PROBLEM TO BE SOLVED: To provide a pulverized coal injection device for a blast furnace that is effective for improving a permeation characteristic in the blast furnace through improving combustibility of pulverized coal that is injected into a blast tuyere or a blow pipe, and to provide an injection method using the device.;SOLUTION: There is provided the pulverized coal injection device that includes one or two or more injection lances inserted in an inside of the blast tuyere and/or the blow pipe of the blast furnace at a prescribed angle. The pulverized coal injection device for the blast furnace further includes, in an inner peripheral surface of the blast tuyere and/or the blow pipe, a dispersion projection which is installed at a backside position on an upstream side disposed apart from a tip opening part of the injection lance. The pulverized coal injection method into the blast furnace is also provided.;COPYRIGHT: (C)2014,JPO&INPIT