Method of estimating the pulverized coal combustion rate during blast furnace operation

摘要

The present invention provides a method for estimating the combustibility of pulverized coal which can quantitatively and easily quantitatively measure the burning rate of non-pulverized coal in a combustion furnace during blast furnace operation in a blast furnace blast furnace for blowing pulverized coal.;In order to achieve the above object, the present invention provides a blast furnace operation method for blowing pulverized coal into a blast furnace (2);A step of previously measuring the carbon content of the pulverized coal excluding the volatile components;;Discharging oxygen into the tuyere and measuring the maximum temperature of the combustion zone according to the amount of oxygen supplied to the tuyere through a monitoring window;;Collecting the in-furnace coke in the furnace at a resting state according to the blowing oxygen load amount, and determining the burning rate according to the oxygen loading amount;;Obtaining a correlation between the maximum temperature and the combustion rate of the pulverized coal using the regression analysis based on the measured oxygen enrichment amount; And;When the burning rate during blast furnace operation is required, the maximum temperature of the combustion zone is measured by a high-temperature thermometer, and the burning rate obtained by substituting the measured maximum temperature into the correlation formula obtained above is used to determine the burning rate at the time of estimating the burning rate. The technical point of the method of estimating the burning rate of the pulverized coal is as follows.