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A Method for Evaluation of Coke Deterioration Degree in Blast Furnace

An evaluation method, coke technology, applied in blast furnaces, blast furnace details, chemical process analysis/design, etc., can solve problems such as difficulty, iron slag weight ratio has a great influence, cannot accurately reflect the degree of coke deterioration, etc., and reduce labor intensity Effect

Active Publication Date: 2020-08-04
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is inevitable for coke to be scoured by molten iron in the blast furnace. Due to the adhesion of iron slag and coke, and the density of iron is much higher than that of coke, iron slag has a great influence on the particle size-weight ratio of all levels. If it is not cleaned cleanly, it will lead to failure Accurately reflect the deterioration degree of coke in the blast furnace
Most of the existing methods use manual methods to clean the iron slag on the coke surface, which is not only difficult and time-consuming, but also wastes a lot of manpower and material resources

Method used

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  • A Method for Evaluation of Coke Deterioration Degree in Blast Furnace
  • A Method for Evaluation of Coke Deterioration Degree in Blast Furnace
  • A Method for Evaluation of Coke Deterioration Degree in Blast Furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1 (at 3200m 3 The test was carried out by taking samples 1m away from the tuyere in a blast furnace)

[0035] A method for evaluating the degree of deterioration of coke in a blast furnace, the steps of which are:

[0036] 1) Analyze the particle size of the coke entering the furnace the day before the blast furnace shutdown, and take the average particle size as the average particle size M of the coke entering the furnace 1 ; See Table 1 for details

[0037] Table 1 The particle size distribution of coke before entering the furnace in this embodiment

[0038]

[0039] Take the average coke particle size average of the above three times as the average particle size M of coke entering the furnace 1 =50.18mm;

[0040] 2) When the blast furnace is repaired, the coke samples in the blast furnace are taken to analyze the average particle size and particle size distribution of the coke;

[0041] 3) First remove the gun mud and slag in the coke taken, and then ...

Embodiment 2

[0062] Example 2 (at 4000m 3 The test was carried out by taking samples 1.5m away from the tuyere in a blast furnace)

[0063] A method for evaluating the degree of deterioration of coke in a blast furnace, the steps of which are:

[0064] 1) Analyze the particle size of the coke entering the furnace the day before the blast furnace shutdown, and take the average particle size as the average particle size M of the coke entering the furnace 1 ; See Table 3 for details

[0065] Table 3 The particle size distribution of coke before entering the furnace in this embodiment

[0066]

[0067] Take the average coke particle size average of the above three times as the average particle size M of coke entering the furnace 1 =50.04mm;

[0068] 2) When the blast furnace is repaired, the coke samples in the blast furnace are taken to analyze the average particle size and particle size distribution of the coke;

[0069] 3) First remove the gun mud and slag in the coke taken, and the...

Embodiment 3（3200

[0090] Example 3 (3200m 3 level blast furnace)

[0091] 1) Sampling and analyzing the coke entering the furnace one day before repairing in the blast furnace to calculate the average particle size, taking the average value as the average particle size of the coke entering the furnace, denoted as M 1 =50.12

[0092] Table 5 The particle size distribution of coke before entering the furnace in this embodiment

[0093]

[0094] Take the average coke particle size average of the above three times as the average particle size M of coke entering the furnace 1 =50.12mm;

[0095] 2) During the intermediate maintenance of the blast furnace, when the material level in the furnace is lowered to a certain position, the furnace will be shut down and the hearth will be manually dug; during the process of hearth digging, coke will be collected from different levels in the entire furnace and different positions on the same level Sample, according to the method of the present invention ...

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Abstract

The invention provides a method for evaluating the coke degradation degree in a blast furnace. The method comprises the following steps that particle size analysis is carried out on coke entering theblast furnace on the previous day before damping down; when the blast furnace damps down, coke samples are taken; stemming in the coke is removed, and iron particles are taken out by a magnet for thefirst time; the particle size is graded; the coke which is taken out from each grade of coke is put into a muffle furnace for combustion correspondingly; after the coke is taken out, residual iron slags are taken out again by using the magnet; the iron slags are weighed; the weight percentage Xi of the residual iron slags taken out for each grade accounting for the coke of the same grade in the muffle furnace is calculated correspondingly; the net coke net weight Bi in the furnace with each particle size grade is calculated; the percentage Ci of the coke for each grade in the furnace accounting for the total weight of the coke is calculated; the average particle size M2 is calculated; the difference value M is calculated; the M is used for representing the degradation degree of the coke inthe blast furnace; and the shape and the size of a tuyere convolution zone are judged, and whether the coal gas distribution in the blast furnace is reasonable or not is analyzed so as to adaptivelyadjust the air inlet area and the air inlet speed of the blast furnace.

Description

technical field [0001] The invention relates to a method for judging the working condition of a blast furnace, and specifically belongs to a method for evaluating the deterioration degree of coke in a blast furnace. Background technique [0002] Coke plays a very important role in the blast furnace ironmaking process. The difference in the degree of coke deterioration in the blast furnace will cause a huge change in the smelting status of the blast furnace. Therefore, in order to obtain accurate data on the state of coke in the furnace, many blast furnace workers often When the blast furnace is repaired, some coke is obtained from the furnace, and some data such as particle size classification and average particle size of the obtained coke are used to reflect the degree of deterioration of the coke in the blast furnace. [0003] By judging the degree of degradation reaction of coke in the blast furnace, it can be used to guide the production operation of the blast furnace an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B5/00G16C20/10
CPCC21B5/007G16Z99/00Y02P10/20
Inventor 任玉明常红兵鲍俊芳陈鹏项茹宋子逵
Owner 武汉钢铁有限公司
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