AN APPARATUS FOR CONTROLLING THE PRESSURE OF TOP HOPPER IN A BLAST FURNACE

摘要

PURPOSE: An apparatus is provided to stabilize gas pressure of blast furnace by preliminarily detecting pressure change of the upper part of Bischoff when blast furnace gas flows in top hopper from upper part of Bischoff and performing compensation control, thereby minimizing change of gas pressure according to pressure change of the upper part of Bischoff. CONSTITUTION: The apparatus comprises a plurality of gas pressure detection parts(6,7,8) for detecting gas pressure of an upper part of the blast furnace(1); a detection part(34) for detecting pressure of an upper part of Bischoff(10); first operation part(35) for operating the deviation value between the maximum value (a) among gas pressure values detected in the plurality of gas pressure detection parts and pressure values (b) detected in the detection part(34); second operation part(36) for operating the deviation value between output values (c) of the first operation part and the maximum value (a) among a plurality of the gas pressure values; and a gas pressure control part(32) for controlling opening and closing of cone valve of Bischoff according to the deviation value between output values (d) of the second operation part and a preset gas pressure value (SV) of the blast furnace, wherein the apparatus further comprises a detection part(13) for detecting pressure of a rear part pressure of Bischoff, third operation part(37), a pressure control part(38) for controlling pressure of a rear part of Bischoff and a signal control part(33).