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Steel-making process material distribution method based on gas analysis

A material distribution and gas technology, which is applied in the field of distribution in the steelmaking process based on gas analysis, can solve the problems of improper feeding timing, splashing, and high material consumption.

Active Publication Date: 2019-04-12
SHANDONG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] This application provides a material distribution method in the steelmaking process based on gas analysis to solve the technical problems of improper feeding timing, high material consumption, and splashing during the smelting process

Method used

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  • Steel-making process material distribution method based on gas analysis

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The embodiment of the present application provides a method for distributing materials in the steelmaking process based on gas analysis, including:

[0025] Before charging the converter, ensure the normal operation of the secondary system and the furnace gas analysis system. After the charging is completed, the furnace body returns to the zero position, and the lowering gun blowing begins.

[0026] Calculate the total amount of lime, dolomite, and ore that needs to be input in the steelmaking process.

[0027] Measuring O in Furnace Gas Using Furnace Gas Analysis System 2 , CO, CO 2 content value, and the measured O 2 , CO, CO 2 The content value is fed back to the secondary control system.

[0028] The furnace gas is the furnace gas that has been sprayed and cooled after being extracted by the furnace gas analysis system from the outlet of the converter flue evaporative cooler. Specifically, the furnace gas is extracted from the exit position of the converter flu...

Embodiment 2

[0041] The embodiment of the present application provides a method for distributing materials in the steelmaking process based on gas analysis, including:

[0042] Before charging the converter, ensure the normal operation of the secondary system and the furnace gas analysis system. After the charging is completed, the furnace body returns to the zero position, and the lowering gun blowing begins.

[0043] Calculate the total amount of lime, dolomite, and ore that needs to be input in the steelmaking process.

[0044] Measuring O in Furnace Gas Using Furnace Gas Analysis System 2 , CO, CO 2 content value, and the measured O 2 , CO, CO 2 The content value is fed back to the secondary control system.

[0045] When O in the furnace gas 2 When the CO content is 12% to 18% and the CO content is 6% to 10%, the secondary control system controls the first feeding, which includes lime, dolomite and ore, wherein the lime is the lime 65% of the total amount, dolomite is 100% of the...

Embodiment 3

[0050] As shown in Table 1, taking the smelting of Q345R and the target carbon content of 0.06% as an example, the distribution control of the converter is as follows:

[0051] After calculation, the total amount of lime is 6367kg, the total amount of dolomite is 1724kg, and the total amount of ore is 3077kg;

[0052] Table 1 Taking the smelting of Q345R and the target carbon of 0.06% as an example, the distribution control of the converter

[0053]

[0054] To sum up, this application provides a method for distributing material in the steelmaking process based on gas analysis, including: calculating the total amount of lime, dolomite, and ore required in the steelmaking process; using the furnace gas analysis system to measure the furnace O in the air 2 , CO, CO 2 content value, and the measured O 2 , CO, CO 2 The content value is fed back to the secondary control system; the secondary control system receives O in the furnace gas 2 , CO, CO 2 content information, and...

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Abstract

The invention discloses a steel-making process material distribution method based on gas analysis. The steel-making process material distribution method based on gas analysis comprises the following steps that the total amount of required lime, the total amount of required dolomite and the total amount of required ore in the steel-making process are calculated; content values of O2, CO and CO2 infurnace gas are measured by utilizing a furnace gas analysis system, and the measured content values of the O2, the CO and the CO2 are fed back to a secondary control system; and the secondary controlsystem receives the content information of the O2, the CO and the CO2 in the furnace gas, and the feeding process is controlled according to the content values of the O2, the CO and the CO2. According to the steel-making process material distribution method, the change of the different gas content values in the furnace gas can reflect different smelting periods in a converter, the feeding processis controlled according to the gas content values so that the series of problems such as improper feeding time of the feeding process, high material consumption and splashing can be effectively avoided, all smelting operation requirements of the top-bottom combined blowing converter are met, the problem that the adjustment cannot be achieved when the smelting process is operated according to a set value due to the fact that an original pure auxiliary gun control method is adopted is solved, the operation of the converter is greatly stabilized, and the end-point hitting rate is increased.

Description

technical field [0001] The present application relates to the technical field of converter steelmaking, in particular to a method for distributing materials in the steelmaking process based on gas analysis. Background technique [0002] The converter is one of the main equipments for steelmaking, and its output accounts for more than 80% of the total steel output in my country. The raw materials for converter steelmaking include lime, dolomite, ore, etc. in addition to molten iron and steel scrap. [0003] At present, the converters in most domestic steel mills mostly use sub-lance operation for steelmaking operations. The information collected in advance by the sub-lance system is used for calculation. The smelting process is controlled according to a static model. Only when the smelting end point is measured by the first sub-lance probe is dynamic fine-tuning . [0004] However, the existing smelting process cannot realize the dynamic adjustment function throughout the w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/28
CPCC21C5/28
Inventor 高志滨郭伟达李强笃王忠刚薛志张伟李俊王强卢波张海波
Owner SHANDONG IRON & STEEL CO LTD
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