Method for evaluating coke degradation degree in blast furnace

Abstract

The invention provides a method for evaluating the coke degradation degree in a blast furnace. The method comprises the following steps that particle size analysis is carried out on coke entering theblast furnace on the previous day before damping down; when the blast furnace damps down, coke samples are taken; stemming in the coke is removed, and iron particles are taken out by a magnet for thefirst time; the particle size is graded; the coke which is taken out from each grade of coke is put into a muffle furnace for combustion correspondingly; after the coke is taken out, residual iron slags are taken out again by using the magnet; the iron slags are weighed; the weight percentage Xi of the residual iron slags taken out for each grade accounting for the coke of the same grade in the muffle furnace is calculated correspondingly; the net coke net weight Bi in the furnace with each particle size grade is calculated; the percentage Ci of the coke for each grade in the furnace accounting for the total weight of the coke is calculated; the average particle size M2 is calculated; the difference value M is calculated; the M is used for representing the degradation degree of the coke inthe blast furnace; and the shape and the size of a tuyere convolution zone are judged, and whether the coal gas distribution in the blast furnace is reasonable or not is analyzed so as to adaptivelyadjust the air inlet area and the air inlet speed of the blast furnace.

Description

Technical field [0001] The invention relates to a method for judging the working condition of a blast furnace, which is exactly a method for evaluating the degree of coke deterioration in a blast furnace. Background technique [0002] Coke plays a very important role in the process of blast furnace ironmaking. Different degrees of coke degradation reactions in the blast furnace will cause huge changes in the smelting status of the blast furnace. Therefore, in order to obtain accurate data on the state of coke in the furnace, many blast furnace workers often When repairing air in the blast furnace, some coke is obtained from the furnace, and some data such as the particle size classification and average particle size of the coke are used to reflect the degree of degradation reaction of the coke in the blast furnace. [0003] By judging the degree of degradation reaction of coke in the blast furnace, it can be used to guide blast furnace production operations and strengthen the judgm...

AI Technical Summary

Problems solved by technology

However, it is inevitable for coke to be scoured by molten iron in the blast furnace. Due to the adhesion of iron slag and coke, and the density of iron is much higher than that of coke, iron slag has a great influence on the particle size-weight ratio of all levels. If it is not cleaned cleanly, it will lead to failure Accurately reflect the deterioration degree of coke in the blast furnace

Most of the existing methods use manual methods to clean the iron slag on the coke surface, which is not only difficult and time-consuming, but also wastes a lot of manpower and material resources

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