Method for judging position of cohesive zone of blast furnace and position of cohesive zone of blast furnace

Abstract

The invention relates to a method for judging a position of a cohesive zone of a blast furnace and the position of the cohesive zone of the blast furnace. The method is used for judging the position of the cohesive zone of the large-scale blast furnace of which the volume is 4000 to 5000 m<3>; a flat cold plate structure is adopted by a furnace body of the blast furnace; the furnace body totally comprises 53 layers of flat cold plates; a furnace bosh of the blast furnace is in 14th to 20th layers; the method comprises the judging steps of (I) measuring a thermal load valve of each part, and measuring a thermal load valve of the upper part of the furnace body; (II) comparing a ratio of the thermal load values of all parts according to the thermal load values of all the parts, wherein the thermal load value of a furnace bosh area during normal production of the large-scale blast furnace is (450 to 550)*10MJ / h, the ratio of the thermal load value of the furnace bosh area occupies 4.5% to 5,5% of the thermal load of the whole blast furnace, and the thermal load ratio of each flat cold plate layer is lowest; (III) judging that the position of the cohesive zone is in the furnace bosh. According to the method for judging the position of the cohesive zone of the blast furnace, disclosed by the invention, the position of the cohesive zone of the blast furnace during normal production can be clearly found; the temperature of the cohesive zone is controlled to be 50 to 60 DEG C after the position of the cohesive zone is determined, and a furnace wall can be prevented from getting thick.

Description

technical field [0001] The invention relates to a method for judging the position of the reflow zone of a blast furnace and the position of the reflow zone. Background technique [0002] The position and shape of the blast furnace reflow zone have a great influence on the gas distribution, heat exchange, reduction process and air permeability in the blast furnace. Although modern blast furnace ironmaking production has existed in China for more than 100 years, it is still in the smelting stage of adjusting the operating system and operating parameters according to changes in operating parameters such as wind pressure, air permeability index and furnace wall temperature. Although a large number of detection couples and shaft static pressure measurement points are installed on the modern large-scale blast furnace body, none of them can reflect and determine the position of the reflow zone in the blast furnace, thus giving the blast furnace operator an analysis of the furnace c...

AI Technical Summary

Problems solved by technology

As a result, although the blast furnace ironmaking production operation has been developed for more than 100 years, it still remains at the stage of judging by experience, and has not yet reached the stage of scientific understanding and operation, with large deviations

It is still not very good. Judging the rationality of the gas flow in the furnace and the operation of the furnace type according to certain furnace condition parameters, especially the position and shape of the soft fusion zone, which has an important impact on the physical and chemical reactions in the blast furnace, resulting in The impression and concept that the blast furnace operation has uncertainty appeared, so that the blast furnace smelting operation has been stuck in the stage of similar manual operation

Failed to realize scientific, data-based and precise operation