A Method for Quantitatively Evaluating Blast Furnace Hearth Activity Index

A technology of active index and quantitative evaluation, which is applied in the field of quantitative evaluation of the active index of blast furnace hearth, can solve the problems such as the mismatch between the kinetic energy of the blast and the shape characteristics of the swirl zone, and the uniformity of the circumference of the tuyere is not considered, so as to avoid the mismatch of the shape characteristics, The effect of overcoming distortion and reflecting effectively
CN112111617BActive Publication Date: 2022-03-11CISDI ENG CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CISDI ENG CO LTD
Publication Date
2022-03-11

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Abstract

The invention belongs to the technical field of blast furnace ironmaking, and relates to a method for quantitatively evaluating the activity index of a blast furnace hearth, comprising: using the activity of the tuyere swirl area to characterize the blast furnace hearth activity index; Blast kinetic energy E, depth of tuyere swirl area D R , Width of tuyere swirl area W R ; Secondly, according to the proportion of the area of ​​the tuyere swivel area and the ratio of the width of the tuyere swirl area to the circumference of the blast furnace hearth, the permeability index K of the tuyere swirl area is calculated respectively 1 and hearth cross-section air permeability index K 2 ;Comprehensive construction of blast furnace hearth activity index HAI, and HAI=K 1 *K 2 , to achieve quantitative characterization of hearth activity. This method overcomes the distortion and lag of traditional hearth activity calculation results, can accurately, reasonably and effectively reflect the activity level and state of the hearth area, and is an important judgment basis and technical basis for guiding the adjustment of the lower part of the blast furnace.
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Description

technical field

[0001] The invention belongs to the technical field of blast furnace ironmaking, in particular to a method for quantitatively evaluating the activity index of a blast furnace hearth. Background technique

[0002] The state of the blast furnace hearth is the basis for the smooth running of the blast furnace. In recent years, due to the deterioration of the quality of raw materials and fuels, the boilers have been shut down frequently. Insufficient understanding of the operation theory and other reasons lead to frequent accidents of abnormal activity of the blast furnace hearth, which brings great safety hazards and economic losses to the production process. Therefore, quantifying blast furnace hearth activity is of great significance to guide blast furnace production operations.

[0003] At present, regarding the evaluation of hearth activity, ironmaking operators mainly use the ratio of furnace bottom center temperature to hearth side wall temperature to ch...

Claims

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