A Judgment Method for Uneven Working of Blast Furnace Hearth

Abstract

A method for judging the uneven operation of the hearth of a blast furnace, which collects the actual tapping and slag information of each furnace of molten iron in the blast furnace, and records the tapping times of the blast furnace, the actual amount of iron tapping, the actual amount of slag tapping, the tapping time, Slagging time, taphole depth, molten iron temperature, molten iron composition, and then calculate the iron flow rate and slag seeing rate at each tapping, and remove the data during the blast furnace ditch repair period to establish the daily slagging and iron tapping of each taphole of the blast furnace Information, according to the actual iron output, actual slag output, silicon content, molten iron temperature, iron flow speed and slag seeing rate conditions of the target iron hole, to judge whether there is uneven work in each iron hole of the blast furnace. The present invention is based on the slag discharge parameters of each tap hole during each tap, combined with the uniformity of air supply at the lower tuyeres and the setting of furnace top material distribution, diagnoses the uniformity of the hearth, and finds out the unevenness of the hearth The reason is to optimize the tapping system, air supply system and cloth system, which is fast and accurate.

Description

A method for judging uneven operation of blast furnace hearth technical field The present invention relates to the technical field of iron and steel metallurgy, and in particular to a method for judging the uneven operation of a blast furnace hearth. Background technique [0002] The working uniformity of the blast furnace hearth refers to the difference in the circumferential direction when the hearth is working. When the circumferential direction of the hearth The smaller the difference is, the better the uniformity of the circumferential work is, which is mainly manifested in the small difference in the slag tapping of each tap hole, and the molten iron of each tap hole. The difference in temperature, Si, and S is small, the molten iron has good fluidity, and there is no molten iron circulation, and the probability of abnormal corrosion of the hearth refractory Both cylinder life and blast furnace longevity are of great significance, especially for extra-large blast ...

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Problems solved by technology

[0007] However, this method of judging the uniformity of the hearth by evaluating the temperature uniformity of the hearth thermocouple is indirect and one-sided.

At the same time, because there is a long-term difference in the hearth in a certain direction, it will cause a greater degree of erosion of the refractory material in this direction, and the temperature of the hearth thermocouple in this direction will be higher. Therefore, the hearth bottom The reaction of the thermocouple temperature to the working state of the hearth is also lagging and delayed

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