Method for quantitatively evaluating activity of tuyere convolute region

A technology for quantitative evaluation and swirl area, applied in directions such as tuyeres, can solve problems such as the mismatch between the kinetic energy of the blast and the shape characteristics of the swirl area

Inactive Publication Date: 2012-10-31
BAOSHAN IRON & STEEL CO LTD
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Problems solved by technology

However, the original blast kinetic energy is used as an index to characterize the change of shape characteristics of the blast furnace tuyere convoluted area, and there are certain shortcomings, that is, the same blast kinetic e

Method used

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  • Method for quantitatively evaluating activity of tuyere convolute region
  • Method for quantitatively evaluating activity of tuyere convolute region
  • Method for quantitatively evaluating activity of tuyere convolute region

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Embodiment

[0063] Such as figure 1 As shown, the coke below the entire reflow zone of the blast furnace can be divided into three areas: the main coke area 11 feeding to the gyration area, the coke slow-moving area 12 and the dead charge column 13 . Among them, D 1 is the diameter of the bottom surface of the dead material column 13 at the tuyere swirl zone 14, D 2 is the hearth diameter, therefore, (D 2 -D 1 ) / 2 is the depth D of the maneuver area R , the larger the value, the larger the corresponding coke mainstream area 11, and the smaller the dead material column 13, the air-permeable and liquid-permeable passages gradually increase, which is beneficial to the forward movement of the charge, the uniform distribution of the gas flow, and the relationship between the gas and the charge. The heat transfer and mass transfer process between them.

[0064] Such as figure 2 shown, for figure 1 Schematic cross-sectional view at the horizontal plane of the mid-tuyere. The top of the ...

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Abstract

The invention relates to a method for quantitatively evaluating activity of a tuyere convolute region. In the method, the depth DR of the tuyere convolute region, the width WR of the tuyere convolute region, the sectional area A of the convolute region, the sectional area B of the adjacent tuyere and the sectional area Sdead of a dead material column are calculated through the basic parameters of the tuyere convolute region of a blast furnace; and the activity index AIR of the tuyere convolute region of the blast furnace is calculated through a formula. According to the method, the defect of mismatch of the original 'blasting kinetic energy' index and the shape characteristic of the convolute region is overcome; the activity index of the tuyere convolute region and the depth of the convolute region basically form a one-to-one correspondence relationship; the active degree and the existing state of the tuyere convolute region and an air-permeating and liquid-permeating channel on the lower part are reflected accurately, reasonably and effectively; and important judgment basis and technical basis are provided for a regulating agent on the lower part of the blast furnace.

Description

technical field [0001] The invention relates to a method for quantitatively evaluating the activity of a tuyere swirl zone, which belongs to the field of blast furnace operation in iron and steel smelting. Background technique [0002] The gas flow characteristics at the level of the blast furnace tuyere determine the initial distribution of the gas flow in the lower part, and then directly affect the mass, momentum and heat transfer between the gas and solid phases in the furnace from the source and the reduction of the iron-containing charge. Therefore, the flow characteristics of the tuyere gas are investigated. It is the cornerstone of optimizing the gas flow distribution in the furnace, and it is of great significance to improving the production and quality indicators of the blast furnace. In the actual production process of the blast furnace, the shape characteristics of the tuyere swivel area reflect the gas flow characteristics of the tuyere, and directly affect the ...

Claims

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Application Information

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IPC IPC(8): C21B7/16
Inventor 陈永明姜伟忠朱锦明刘成松付长亮徐健
Owner BAOSHAN IRON & STEEL CO LTD
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