A Pre-warning Method for Judging Abnormal Blast Furnace Conditions Based on Static Pressure Difference

Abstract

The invention discloses an early-warning method for judging abnormal furnace conditions of a blast furnace according to static pressure differences. According to changes in the static pressure differences of the blast furnace at different heights in various directions and the overall pressure difference of the blast furnace, airflow distribution and stock column motion in the blast furnace are recognized in time by a data mining technology so as to deduce the time and extents of the changes influencing the furnace conditions, and then the furnace conditions can be timely recovered to a normal state by adopting effective measures so as to guarantee the stability and smooth running of the blast furnace. Through adoption of the early-warning method, early warnings of burden hanging and channeling are given according to the changes in the static pressure differences of the blast furnace, the positions of the abnormal furnace conditions are analyzed, and pertinent measures are adopted for treatment in advance, so that an upcoming abnormal furnace condition can be eliminated or the accident influence can be reduced to the smallest extent.

Description

technical field [0001] The invention relates to the technical field of forecasting abnormal blast furnace conditions, in particular to an early warning method for judging abnormal blast furnace conditions based on static pressure difference. Background technique [0002] In the blast furnace operation system, the air supply system is one of the important systems, and the adjustment of the blast furnace air flow is related to the quality of the blast furnace. The blast furnace is a shaft furnace type counter-flow reactor. The charge piled up in a columnar shape in the furnace is continuously heated, decomposed, reduced, softened, melted, dripped, and finally separated by forming slag-iron melt under the action of the high-temperature reducing air flow upstream. [0003] Suspended material is generally defined as the furnace material stops falling, and the duration of two batches of material does not fall. More than two consecutive suspensions are called continuous suspensio...

AI Technical Summary

Problems solved by technology

[0005] The traditional judging method mainly relies on the total pressure difference of the blast furnace material column and the drop of the material ruler to judge. It basically analyzes the starting conditions and results. Sometimes when there is a pipeline, the pressure difference will be very low, and the static pressure difference can be very fast. It is obvious that there is a serious problem in the blast furnace, but it is not obvious from the total pressure difference, which is easy to mislead the operator

The current method for judging the abnormal state of the blast furnace air flow is mainly based on the air supply system at the lower part of the blast furnace and the cross temperature measurement or infrared imaging of the furnace top. It belongs to the initial control and result detection of the blast furnace air flow. No, the treatment method lags behind when the furnace condition is abnormal, and it is easy to deal with the abnormality after the result is generated

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