LANCE FOR BLOWING PULVERIZED COAL TO BLAST FURNACE AND METHOD FOR BLOWING PULVERIZED COAL TO BLAST FURNACE

摘要

PROBLEM TO BE SOLVED: To obtain the lance with which the high threshold blowing amt. of pulverized coal is obtd. and which does not give wise to the clogging by the pulverized coal by providing the front end of the lance consisting of a straight tubular body with a reflector for deflecting the direction of the pulverized coal stream flowing in the lance from the axial direction of the tubular body. ;SOLUTION: The front end of the lance 2 which is the straight tubular body is provided with the reflector 2 for deflecting the direction of the pulverized coal stream flowing in the lance 2 from the axial direction of the tubular body. The angle formed by the reflector 1 and the axial direction of the tubular body is so set that the highest combustion rate is attained by the blowing conditions of the pulverized coal. The pulverized coal stream ejected from, the front end of the lance 2 is reflected in a direction exclusive of the axial direction of the tubular body by the reflector 1 and, therefore, the dispensability of the pulverized coal 6 in the radial direction in a blow pipe is improved and the combustion rate is increased, by which the high threshold blowing amt. may be obtd. Since there is no branching part of the pulverized coal stream, the clogging of the lance does not arise.;COPYRIGHT: (C)1999,JPO