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Blast furnace injection coupling method for coking surplus gas based on microwave heating

A microwave heating and gas technology, applied in the field of coking process, can solve the problems of polluting the environment, producing waste water or waste residue, etc., and achieve the effects of reducing the coke ratio of blast furnace, reducing CO2 emission, and increasing the output of coking.

Pending Publication Date: 2022-02-18
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It takes about 20 hours to refine a furnace of coke with the existing technology. In the coke production process, coke oven gas and blast furnace gas are used for heating. Coke oven gas and blast furnace gas will produce a large amount of CO during the combustion process. 2 When the exhaust gas is discharged, it will seriously pollute the environment, accompanied by a large amount of heat release and loss, and at the same time, waste water or waste residue will also be generated during the treatment of the flue gas.

Method used

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  • Blast furnace injection coupling method for coking surplus gas based on microwave heating

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Experimental program
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Effect test

Embodiment 1

[0041] From the production plant, the particle size is less than 6mm, the ash content is A d Content is 7%, volatile matter V d The blended coal with a content of 29% is added to the crusher for crushing. After crushing, the proportion of blended coal with a particle size less than 3mm is 80%. Add 6% water to the crushed blended coal, and mix the blended coal with good moisture Put it into a microwave heating furnace container and heat it with microwaves. The heating system used in this example is: heating from room temperature to 1040°C for a heating time of 10 hours. In the process of coking, a large amount of gas is produced through tar capture and treatment. The tar capture adopts the existing technology of gas tar treatment equipment and its treatment process, which will not be repeated here. Part of the gas is pressurized to 360kPa by the compressor and sprayed directly through the nozzle. Into the blast furnace, the amount of gas injected is 150m 3 / tFe, compared with...

Embodiment 2

[0043] From the production plant, the particle size is less than 6mm, the ash content is A d Content is 9%, volatile matter V dThe blended coal with a content of 27% is added to the crusher for crushing. After crushing, the proportion of the blended coal with a particle size less than 3mm is 79%. Add 5% water to the crushed blended coal, and mix the blended coal with good moisture Put it into a microwave heating furnace container and heat it with microwaves. The heating system used in this example is: heating from room temperature to 1040°C for a heating time of 9 hours. In the process of coking, a large amount of gas is produced through tar capture and treatment. The tar capture adopts the existing technology of gas tar treatment equipment and its treatment process, which will not be repeated here. Part of the gas is pressurized to 350kPa by the compressor and sprayed directly through the nozzle. Into the blast furnace, the amount of gas injected is 130m 3 / tFe, compared wi...

Embodiment 3

[0045] From the production plant, the particle size is less than 6mm, the ash content is A d Content is 11%, volatile matter V d The blended coal with a content of 26% is added to the crusher for crushing. After crushing, the proportion of the blended coal with a particle size less than 3mm is 77%. Add 4% water to the crushed blended coal, and mix the blended coal with good moisture Put it into a microwave heating furnace container and heat it with microwaves. The heating system used in this example is: heating from room temperature to 1040°C, the heating time is 8h, and when the center temperature of the coke cake reaches 1040°C, keep the temperature for 1h. In the process of coking, a large amount of gas is produced through tar capture and treatment. The tar capture adopts the existing technology of gas tar treatment equipment and its treatment process, which will not be repeated here. Part of the gas is pressurized to 355kPa by the compressor and sprayed directly through th...

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Abstract

The invention discloses a blast furnace injection coupling method for coking surplus gas based on microwave heating. The blast furnace injection coupling method comprises the following steps: 1, crushing blended coal; 2, adjusting the moisture of the crushed blended coal; 3, carrying out microwave heating coking on the blended coal having been subjected to moisture adjustment, and collecting coal gas generated in a coking process; 4, after the coal gas is subjected to tar capture treatment, pressurizing a part of the coal gas, spraying the pressurized coal gas into a blast furnace, allowing the coke ratio of blast furnace production to be reduced by 4-6%, and enabling the rest of the coal gas to enter a coal gas cabinet to be stored; and 5, after coking is completed, discharging coke from the furnace, cooling the coke, and subjecting the coke to application after quality inspection, wherein the CRI of the coke is 23-26%, and the CSR of the coke is 66-68%. According to the method, the surplus coal gas generated by microwave heating coking is used for blast furnace injection, so the coke ratio of the blast furnace can be effectively reduced, good economic benefits are achieved,carbon emission of the blast furnace is reduced, and good environmental benefits are achieved.

Description

technical field [0001] The invention relates to a coking process for high-temperature pyrolysis of coal into coke, in particular to a blast furnace injection coupling method based on microwave heating of coking surplus gas. Background technique [0002] In recent years, environmental issues such as global warming have become increasingly severe, and CO2 emission reduction has become a common challenge faced by mankind. Among them, the emissions of the iron and steel industry account for more than 15% of the total emissions. For a long period of time now and even in the future, the blast furnace-converter process is still the main process of steel production, and the CO2 emissions and energy consumption of blast furnace ironmaking in this process account for more than 80% and 70% of the entire process, respectively. [0003] my country has abundant coal resources. In the process of energy utilization, the dependence on coal is relatively large. The coal utilization methods ar...

Claims

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Application Information

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IPC IPC(8): C10B23/00C10B43/06C10B57/00C10B57/16
CPCC10B23/00C10B43/06C10B57/005C10B57/16
Inventor 王玉明胡德生徐万仁
Owner BAOSHAN IRON & STEEL CO LTD
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