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Height control method and device for oxygen lance

An oxygen lance height and control method technology, applied in the metallurgical field, can solve the problems that the stability of the steelmaking process cannot be ensured and the control accuracy of the oxygen lance height is not high.

Active Publication Date: 2020-11-13
BEIJING SHOUGANG AUTOMATION INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems existing in the prior art, the embodiment of the present invention provides a method and device for controlling the height of the oxygen lance, which is used to solve the problem that the control accuracy of the height of the oxygen lance in the prior art is not high enough to ensure the stability of the steelmaking process technical issues

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  • Height control method and device for oxygen lance
  • Height control method and device for oxygen lance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] This embodiment provides a method for controlling the height of the oxygen lance, such as figure 1 As shown, the methods include:

[0055] S110, acquiring the target height of the oxygen lance, the current height of the oxygen lance, the preset maximum height and minimum height of the oxygen lance, the maximum speed and the minimum speed of the oxygen lance;

[0056] When automatically controlling the movement of the oxygen lance, obtain the target height Lance_Set[n] of the oxygen lance issued by the secondary system, the current height Lance_Real[n] of the oxygen lance, the preset maximum height of the oxygen lance Lance_Max, height The minimum value Lance_Min, the maximum and minimum speed of the oxygen lance.

[0057] S111. Obtain an altitude deviation between the current altitude and the target altitude, and determine a control instruction based on the altitude deviation;

[0058] After the current altitude and the target altitude are obtained, the altitude devia...

Embodiment 2

[0088] This embodiment provides a control device for the height of the oxygen lance, such as figure 2 As shown, the device includes: an acquisition unit 21, a determination unit 22, and a control unit 23; wherein,

[0089] An acquisition unit 21, configured to acquire the target height of the oxygen lance, the current height of the oxygen lance, the preset maximum height and minimum height of the oxygen lance, the maximum speed and the minimum speed of the oxygen lance ;

[0090] The determining unit 22 is configured to obtain an altitude deviation between the current altitude and the target altitude, determine a control instruction based on the altitude deviation; determine a corresponding speed preset value based on the altitude deviation and a speed proportional coefficient; The above speed preset value and preset speed reduction strategy determine the corresponding current actual speed in different altitude ranges;

[0091] The control unit 23 is configured to control t...

Embodiment 3

[0121] In practical application, when it is necessary to control the drop of the oxygen lance for the first time in the steelmaking process, the specific implementation is as follows:

[0122] Obtain the target height Lance_Set[1] of the oxygen lance issued by the secondary system, the current height Lance_Real[1] of the oxygen lance, the preset maximum height Lance_Max of the oxygen lance, the minimum height Lance_Min, and the speed of the oxygen lance Maximum and minimum speed. Among them, the target height is 1100cm, the current height of the oxygen lance is 2100cm, the maximum height is 3200cm, and the minimum height is 960cm; the maximum speed is 16000, and the minimum speed is 500.

[0123] A height deviation between the current height and the target height is determined, and a control command is determined based on the height deviation. The altitude deviation in this embodiment is -1000, so the control command should be a descending command.

[0124] The speed preset ...

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Abstract

The invention provides a height control method and device for an oxygen lance. The method comprises the following steps of acquiring the target height, current height, maximum height, minimum height,maximum speed and minimum speed of the oxygen lance; acquiring the height deviation between the current height and the target height, and determining a control command based on the height deviation; determining a corresponding speed preset value based on the height deviation and a speed ratio coefficient; determining corresponding current actual speeds within different height ranges based on the speed preset value and a preset speed lowering strategy; and controlling the oxygen lance to move based on the control command and the corresponding current practical speed. The actual running speed ofthe oxygen lance is reduced step by step based on the preset speed lowering strategy no matter the oxygen lance is controlled to ascend or descend, so that the oxygen lance runs at different speeds in different height ranges, the running speed is lower when the oxygen lance gets closer to the target height, the height adjustment accuracy can be ensured, and the height control accuracy of the oxygen lance can be ensured.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, in particular to a method and device for controlling the height of an oxygen lance. Background technique [0002] In the process of converter steelmaking, the oxygen lance is an indispensable equipment. The height of the oxygen lance is related to the smooth progress of decarburization, temperature rise and smelting process, and finally affects the temperature and carbon content of molten steel at the end of blowing. [0003] The converter oxygen lance system mainly stirs the molten pool through high-speed airflow, and controls the impact area and impact depth by adjusting the height of the oxygen lance, so as to realize the functions of heating up and decarburizing molten steel. [0004] In the prior art, the height of the oxygen lance is mainly controlled by switching between high-speed and low-speed, but the height error of this method is generally about 10cm, and the control accuracy is no...

Claims

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Application Information

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IPC IPC(8): C21C5/30C21C5/46
CPCC21C5/30C21C5/462
Inventor 张洪伟刘建周伟张世凯黄亚男闫小柏刘亚强牛剑伟王俊友杨立丽李爱艳仝超张雷陈浩康新勇
Owner BEIJING SHOUGANG AUTOMATION INFORMATION TECH