Blast furnace hearth sidewall monitoring method

Abstract

The invention provides a blast furnace hearth sidewall monitoring method. According to the monitoring method, the angular heat flow densities of hearth sidewall monitoring positions are obtained, thetemperature is detected by a thermocouple arranged in carbon bricks of the hearth, based on the angular heat flow densities, the temperature, and the angular heat flow density of the hearth lining, the heat resistant values of different positions can be calculated, and the damages of the hearth sidewall can be diagnosed. According to the method, the change rules of onsite detected variables such as temperature are used to judge the situation of a blast furnace hearth; through the thermal resistant values of different positions and change rates in a certain period, the hearth can be diagnosed,the wrong judgment caused by onsite interference, fluctuation of the furnace situations, and change of cooling conditions can be eliminated, and multiple types of damages can be effectively diagnosedat the same time.

Description

Technical field [0001] The invention relates to the technical field of blast furnaces, in particular to a method for monitoring the side walls of a blast furnace hearth. Background technique [0002] The iron and steel industry is the foundation of the country's industrialization and plays a very important role in the development of the national economy. Blast furnace ironmaking is the most important production process in the modern iron and steel industry. With the increase in blast furnace size and smelting intensity, the problem of blast furnace life has become increasingly prominent. The lining of the hearth of the blast furnace is in direct contact with the hot molten iron, which is more susceptible to damage than other parts. During the operation of the blast furnace, the common forms of damage to the lining of the hearth include hot surface lining brick erosion, carbon brick ring cracking, and filler layer air gaps. These damages directly affect the life of the hearth and...

AI Technical Summary

Problems solved by technology

However, since different types of damage and changes in cooling conditions can affect these detection data, and the actual operation of the blast furnace is often accompanied by changes in various factors, under these conditions, existing methods often make misjudgments and missed judgments, and Existing methods do not quantify the severity of sidewall damage

On the other hand, the actual production site environment is harsh and there are many kinds of interference and the furnace conditions will change. Under this condition, the detection data will be disturbed and fluctuate, resulting in misjudgment

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