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Red coke quenching method and quenching device

A red coke and coke quenching technology, applied in the coking field, can solve the problems of affecting the air permeability of the screening blast furnace, increasing the amount of coke used in the blast furnace, increasing the heat consumption, etc., and achieving the effect of reducing the soaking time, reducing the water content, and reducing the fluctuation range

Active Publication Date: 2021-07-09
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

The wet quenched coke obtained by the wet quenching method of red coke contains a lot of water, which will increase the heat consumption in the blast furnace when used in the blast furnace ironmaking process; and when the moisture in the wet quenched coke is too high, a large amount of coke powder will be attached to the coke On the surface, it affects the screening and air permeability of the blast furnace. If the moisture content of coke exceeds 4%, the amount of furnace dust will increase significantly, and the blast furnace will become worse. In addition, the moisture fluctuation of wet quenched coke will also cause deviations in coke weighing, thus affecting Blast furnace coke distribution, specifically, every 1% increase in the moisture of wet quenched coke will increase the amount of blast furnace coke by 1.1-1.3%

Method used

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  • Red coke quenching method and quenching device

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Effect test

Embodiment approach

[0047] As an implementation manner of the embodiment of the present invention, the water coke quenching also includes high-pressure water coke quenching, the high-pressure water coke quenching time is 40-50s, and the water pressure of the high-pressure water coke quenching is 43-80KPa, The high-pressure water coke quenching water flow rate is 1.06-2.42M 3 / s.

[0048] The role of high-pressure water quenching is to enable water to penetrate the entire coke layer, forming rising steam at the bottom of the compartment to extinguish coke. Too long high-pressure water quenching time will lead to increased water consumption for coke quenching. Coke soaked in water for a long time will eventually affect Wet quenching moisture will also lead to long quenching cycle time (coke quenching cycle time = low pressure time + high pressure time), affecting the daily coke quenching output; at the same time, high pressure water is also matched with low pressure water to make coke from top to b...

Embodiment 1

[0084] Embodiment 1 provides a kind of coke quenching method of red coke, take the coke oven of 6 meters high carbonization chamber of a certain coking company as example, specifically as follows:

[0085] 1. Overhaul and replace the body sealing system of the coke quenching car to reduce water leakage of the body, save coke quenching water, and ensure that the red coke is not soaked by too much water.

[0086] 2. Put the red coke smelted in the coke oven into the coke quenching car in step 1, measure the coke thickness of each part in the coke quenching car at the same time, and adjust the valve opening according to the following formula.

[0087] The valve opening of each part = the thickness of coke in each part ÷ the maximum coke thickness in the quenching car × 100%

[0088] The coke thicknesses of the 4 points where the coke is evenly distributed from one side to the other on the center line of the quenching car are 0.48m, 2.40m, 2.40m, and 0.72m respectively, and the ma...

Embodiment 2

[0099] Embodiment 2 provides a kind of coke quenching method of red coke, take the coke oven of 4.3 meters high carbonization chamber of a certain coking company as example, specifically as follows:

[0100] 1. Overhaul and replace the body sealing system of the coke quenching car to reduce water leakage of the body, save coke quenching water, and ensure that the red coke is not soaked by too much water.

[0101] 2. Put the red coke smelted in the coke oven into the coke quenching car in step 1, measure the coke thickness of each part in the coke quenching car at the same time, and adjust the valve opening according to the following formula.

[0102] The valve opening of each part = the thickness of coke in each part ÷ the maximum coke thickness in the quenching car × 100%

[0103] The coke thicknesses of the 4 points where the coke is evenly distributed from one side to the other on the center line of the quenching car are 0.46, 2.30m, 2.25m, and 0.81m respectively, and the m...

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Abstract

The invention provides a red coke quenching method and a quenching device, and belongs to the technical field of coking. The method comprises the following steps: carrying out water quenching on red coke to obtain first coke; carrying out atomization quenching on the first coke to obtain wet quenched coke. In the atomization coke quenching, fog drops and a first coke temperature meet the following relation: when the first coke temperature is greater than or equal to 400 DEG C, the fog drops consist of air with the volume fraction of 30-50% and water drops with the volume fraction of 50-70%; when the first coke temperature is greater than or equal to 150 DEG C and less than 400 DEG C, the fog drops consist of air with the volume fraction of 60-80% and water drops with the volume fraction of 20-40%. By adopting the coke quenching method provided by the invention, the moisture content in the coke can be controlled to be 3.25-3.45%, the moisture content is low, the quality of the coke is improved, the maximum moisture value is 4.5-4.9%, the minimum moisture value is 2.1-2.5%, the fluctuation range is reduced, the moisture is more uniform, and the coke ratio and the fuel ratio are reduced because the stable and smooth operation of the blast furnace is ensured.

Description

technical field [0001] The invention belongs to the technical field of coking, and in particular relates to a red coke quenching method and a coke quenching device. Background technique [0002] Red coke is the product of coke extracted from coal through high-temperature dry distillation in a coke oven. Because the temperature of red coke is very high, generally 950-1100°C, it is not conducive to transportation and storage. It needs to be quenched before it can be used in blast furnace ironmaking. Coke quenching includes dry coke quenching and wet coke quenching. The quality of coke after CDQ treatment is stable, and it is more smooth to use in blast furnace production. However, many domestic steel mills still adopt wet coke quenching treatment, or wet coke quenching treatment is also carried out during the maintenance of the coke dry quenching oven used for coke dry quenching treatment. The wet quenched coke obtained by the wet quenching method of red coke contains a lot ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B39/04
CPCC10B39/04
Inventor 任玉明鲍俊芳李超舒汉军项茹宋子逵
Owner 武汉钢铁有限公司
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