Converter oxygen lance blowing control method based on dry dedusting process

A converter oxygen lance and dry dedusting technology, which is applied in the manufacture of converters, etc., can solve the problems that the dry dedusting converter blowing control technology has not yet been reported.

Inactive Publication Date: 2012-09-26
武钢集团有限公司
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AI Technical Summary

Problems solved by technology

Therefore, the primary problem of the converter steelmaking process equipped with dry dust removal is the safe operation of the electrostatic precipitator, that is, it is necessary to seek a new type of converter steelmaking O 2 The blowing method can effectively suppress or regulate the O in the flue gas 2 and CO content, so that its changes are limited within the range that ensures the safe operation of the dust collector
[0004] Among the domestically developed converter control systems, dry dust removal converter blowing control technology has not yet been published

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  • Converter oxygen lance blowing control method based on dry dedusting process
  • Converter oxygen lance blowing control method based on dry dedusting process

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Embodiment Construction

[0018] The classic converter blowing control process is based on the preset valve position of the oxygen regulator valve directly into the valve regulator PI to automatically adjust. The result of this control is that the O 2 Too late to be oxidized by molten iron (Fe 3 O 4 =2O 2 +3Fe) cause O in the flue gas 2 The content is larger. This has no major impact on traditional wet dust removal. However, for the dry dust removal process with electrostatic precipitator, high O 2 The concentration of flue gas passing through the electrostatic precipitator will cause the risk of explosion venting accidents, making steelmaking impossible. After the initial stage of converting, the amount of oxygen blowing in the steelmaking furnace reaches the set value, the oxidation-reduction reaction in the furnace tends to be stable, and O in the flue gas 2 The content decreases and maintains a certain value, which has no effect on the electrostatic precipitator.

[0019] According to the existing t...

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Abstract

The invention relates to a converter oxygen lance blowing control method based on the dry dedusting process. The method comprises the following steps: when a converter oxygen lance begins to blow or begins to blow, then stops normally and continues to blow, the opening of an oxygen regulating valve is controlled to 50-70% for a certain time and a feeding valve actuator performs automatic regulation; when the converter oxygen lance re-blows in the back stage of the blowing, the oxygen regulating valve is preset to have an automatic initial valve opening and then the feeding valve actuator performs automatic regulation; and when the converter oxygen lance is interrupted by a fault and blows again, the opening of the oxygen regulating valve is fast controlled to 75%-85% for a certain time and the feeding valve actuator performs automatic regulation. By adopting the invention, the contents of O2 and CO in the fume gas can be effectively inhibited or controlled, the changes of the contentsare limited within a safe operation range of the deduster and the safe operation problem of the main devices for dry dedusting is solved.

Description

Technical field [0001] The invention relates to a converter oxygen lance blowing control method of a dry dust removal process in converter steelmaking. Background technique [0002] Dry dust removal is a new type of dust removal process for converter steelmaking in recent years. The dry dust removal process uses nitrogen or steam at the flue venturi tube to atomize the flue gas produced by steelmaking through a special ring nozzle to produce coarse ash precipitation, which is collected and transported. After removing coarse ash, the flue gas is drawn into a high-voltage electrostatic precipitator for fine dust filtration. After passing through the switching station, the qualified flue gas (gas) is sent to the gas tank for recovery. The unqualified flue gas is discharged and burned through the diffuser chimney. [0003] Different from the traditional wet dust removal, the main equipment of dry dust removal, the high-voltage electrostatic 2 And CO reflect sensitively, especially ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/30C21C5/40
Inventor 陈炼
Owner 武钢集团有限公司
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