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Detecting method for air flow distribution of blast furnace

A detection method and airflow technology, applied in blast furnaces, blast furnace details, furnaces, etc., can solve problems such as accelerating blast furnace lining wear and affecting blanking

Active Publication Date: 2014-12-17
INST OF RES OF IRON & STEEL JIANGSU PROVINCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the measurement relies on expensive infrared measurement devices, and the furnace gas sampling device will affect the blanking and accelerate the wear of the blast furnace lining

Method used

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  • Detecting method for air flow distribution of blast furnace
  • Detecting method for air flow distribution of blast furnace
  • Detecting method for air flow distribution of blast furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0118] First in Shagang Hongfa 2500m 3 In the blast furnace, set the number and orientation of the temperature measurement points of the cross temperature measuring gun on the top of the blast furnace, and the distance between the measurement points. And install a temperature measuring gun in the four directions of the blast furnace throat in the southeast and northwest respectively, one temperature measuring gun has 6 temperature measuring points, and the other 3 temperature measuring guns have 5 temperature measuring points each. Take the center of every two temperature measuring points, draw a circle with the center of the blast furnace as the center, and the center of the blast furnace to the center of the temperature measuring point as the radius, divide the section of the furnace throat into 6 parts, the areas are S 1 , S 2 , S 3 , S 4 , S 5 , S 6 , S 1 ~S 6 For the area distribution of each temperature measuring device area, see Figure 4 , Figure 4 It is the ...

Embodiment 2

[0168] Verification of material bed structure and gas velocity distribution detection in actual blast furnace operation

[0169] During the period from December 01, 2013 to January 20, 2014 in Shagang Hongfa 1# blast furnace, the raw material quality of the blast furnace deteriorated, the slag ratio increased to 320kg / t-HM, and the M40 decreased from 84 to 81, although the raw material condition deteriorated , but the operator can reduce the pressure difference of the blast furnace and improve the gas utilization rate through the adjustment of the distribution matrix, see Figure 6 , Figure 6 2500m for the present invention 3 The operation status of the blast furnace from the end of 2013 to the beginning of 2014, such as Figure 6 shown. The main operating parameters change from Case1 to Case5, and the specific parameters are shown in Table 4.

[0170] Table 4 Changes in main operating parameters of Hongfa 2500 blast furnace from December 2013 to January 2014

[0171] ...

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Abstract

The invention provides a detecting method for air flow distribution of a blast furnace. The heat exchange between an air flow and a solid material bed is considered; the distribution of a material layer structure in the radial direction of the blast furnace influences the air permeability of the blast furnace in the radial direction so as to influence the form of the air flow distribution; and the material layer structure in the radial direction of the blast furnace and the air flow distribution are calculated by combining a cross-shaped temperature measuring gun and other main operation parameters of the blast furnace. According to the detecting method provided by the invention, a blast furnace operator can timely and accurately speculate the material layer structure in the radial direction of the furnace throat part and the change direction of the air flow distribution according to the variation of the radial air flow temperature distribution at present, so that the direction is provided for the adjustment of the distribution system, the stable and smooth operation of the blast furnace is guaranteed, the service life is prolonged, the fuel ratio is reduced, and other expensive detecting instruments are not needed.

Description

technical field [0001] The invention belongs to the technical field of numerical simulation of blast furnace gas flow distribution, and in particular relates to a detection method of blast furnace gas flow distribution. Background technique [0002] A blast furnace refers to an ironmaking shaft furnace with a circular cross section. Steel plates are usually used as the furnace shell, and the shell is lined with refractory bricks. From top to bottom, the blast furnace body is divided into five parts: the furnace throat, the furnace body, the furnace waist, the furnace bosh, and the hearth. Due to the good technical and economic indicators of blast furnace ironmaking, simple process, large production volume, high labor production efficiency, and low energy consumption, the iron produced by this method accounts for the vast majority of the world's total iron production. [0003] During blast furnace production, iron ore, coke, and flux (limestone) for slagging are loaded from ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B7/24C21B5/00
CPCC21B5/00C21B5/006C21B5/008C21B7/24C21B7/103
Inventor 赵华涛杜屏
Owner INST OF RES OF IRON & STEEL JIANGSU PROVINCE
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