Online blast furnace soft melting zone root position monitoring method

Abstract

The invention discloses an online blast furnace soft melting zone root position monitoring method. The method comprises the steps that the average density of heat flow passing through furnace linings is calculated by collecting the flow rate and temperature of cooling media in layers of cooling equipment of a blast furnace, the temperature difference between an inlet and an outlet, and other data; the average temperatures of the hot surfaces of all the layers of the furnace linings are calculated by analyzing the heat resistance of all parts between the cooling media and the hot surfaces of the furnace linings and combining the average heat flow density, the temperatures are used as the central point temperatures of the hot surfaces and subjected to interpolation or fitting, and thus, longitudinal temperature distribution of the heat surfaces of the blast furnace is obtained; the upper boundary temperature and the lower boundary temperature of a soft melting zone are calculated according to the phase composition of a to-be-smelted object, and the upper boundary position and the lower boundary position of the root of the soft melting zone can be determined by combining the longitudinal temperature distribution; and thus, online monitoring of the root position of the soft melting zone of the blast furnace can be achieved through online monitoring of the low rate and temperature of the cooling media, the temperature difference between the inlet and the outlet, and other data. The online blast furnace soft melting zone root position monitoring method has the advantages that timeliness is good, calculation is easy, and equipment investment is small; information including longitudinal temperature distribution of the heat surfaces of the furnace linings, the root position of the soft melting zone and the like can be monitored in real time; and theoretical direction is provided for optimized operation of the blast furnace and smooth production.

Description

technical field [0001] The invention relates to a method for on-line monitoring of the root position of a blast furnace reflow zone, and belongs to the technical field of on-line real-time monitoring of ironmaking blast furnaces. Background technique [0002] The shape and position of the blast furnace refractory zone determine the distribution of the reducing airflow and temperature field in the furnace. It is a comprehensive reflection of the upper part of the blast furnace and the adjustment of the operating parameters of the lower tuyeres. It has an important impact on the smelting process and production of the blast furnace. The proper shape and position of the blast furnace reflow zone is the guarantee for the stable operation of the blast furnace reducing gas flow and the realization of high production and low consumption. [0003] Due to the high temperature in the blast furnace, strong redox reaction, dust, and the harsh operating environment of multiphase fluids an...

AI Technical Summary

Problems solved by technology

However, the method of judging the root position of the reflow zone by combining the information of the longitudinal temperature distribution and the boundary temperature of the reflow zone has not yet been reported by scholars in the relevant literature.

Images