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Method for online monitoring converter oxygen jet flow effect

A technology of jet flow and oxygen, which is applied in measuring devices, manufacturing converters, measuring fluid pressure, etc., can solve the problems of inaccurate determination of nozzle melting loss, qualified nozzles offline in advance, and nozzles overdue use, etc., to achieve stable results and real-time data Tracking and increasing the effect of using the furnace

Active Publication Date: 2020-06-05
河钢乐亭钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method cannot accurately determine the working conditions such as the melting of the nozzle, and the abnormal nozzle is often used for an extended period of time, and the qualified nozzle is offline in advance; a large amount of oxygen leakage can only be discovered

Method used

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  • Method for online monitoring converter oxygen jet flow effect
  • Method for online monitoring converter oxygen jet flow effect
  • Method for online monitoring converter oxygen jet flow effect

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The oxygen lance nozzle is used for the first time. The design standard oxygen pressure of the oxygen lance nozzle is 1.07Mpa, and the design standard flow rate is 45000m3 / h.

[0029] Set the first threshold to 1.12 Mpa, and the second threshold to 1.03 Mpa.

[0030] The test is carried out at the stage of slag splashing to protect the furnace when it goes online. Nitrogen blowing with a flow rate of 45000m3 / h is stable and lasts for 40S, during which the actual pressure is P 0 ´=1.08Mpa, between the first threshold and the second threshold, which meets the design requirements, and the oxygen lance is normally used online.

Embodiment 2

[0032] The oxygen lance nozzle is in normal use. The design standard oxygen pressure of the oxygen lance nozzle is 1.07Mpa, and the design standard flow rate is 45000m3 / h.

[0033] Set the first threshold to 1.12 Mpa, and the second threshold to 1.03 Mpa.

[0034] The test is carried out at the stage of slag splashing for furnace protection. Nitrogen blowing with a flow rate of 45000m3 / h is stable for 30S, during which the actual pressure is P 0 ´=1.15Mpa, exceeding the first threshold, the end of the nozzle is severely worn, the jet flow is unstable, the oxygen lance is stopped, and it must be replaced offline.

Embodiment 3

[0036] The oxygen lance nozzle is in normal use. The design standard oxygen pressure of the oxygen lance nozzle is 1.07Mpa, and the design standard flow rate is 45000m3 / h.

[0037] Set the first threshold to 1.12 Mpa, and the second threshold to 1.03 Mpa.

[0038] The test is carried out at the stage of slag splashing for furnace protection. Nitrogen blowing with a flow rate of 45000m3 / h is stable for 60S, during which the actual pressure is P 0 ´=1.00Mpa, lower than the second threshold, the gas supply pipeline leaks, replace the spare oxygen gun, check the pipeline and replace the hose.

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Abstract

The invention relates to a method for online monitoring the converter oxygen jet flow effect, and belongs to the technical field of metal material smelting. According to the technical scheme, a high oxygen jet flow pressure threshold value and a low oxygen jet flow pressure threshold value are set, normal use is carried out within the range, and it is shown that jet flow is in a specific failure state when the value exceeds the specified range; the actual pressure is larger than the first threshold value, and it is shown that abrasion of the end portion of a sprayer exceeds standard requirements; the actual pressure is between the first threshold value and the second threshold value, it is shown that the jet flow meets the requirements; and the actual pressure is smaller than the second threshold value, it is shown that a pipeline leaks. The parameters of the sprayer are online tracked, dynamic oxygen jet flow parameters are precisely designed in an automatic steel smelting technology,and the technical bottleneck problem that the working condition of the sprayer of an oxygen gun cannot be online judged in steel and iron enterprises currently can be effectively solved.

Description

technical field [0001] The invention relates to an online monitoring method for the oxygen jet effect of a converter, belonging to the technical field of metal material smelting. Background technique [0002] In the process of converter steelmaking, oxygen is blown from the upper part of the molten pool through the oxygen lance into the molten iron in the molten pool to achieve the purposes of decarburization, temperature rise, and foaming slag. The oxygen lance nozzle is made of cast copper or forged copper, and is cooled by water inside. [0003] During smelting, the nozzle of the oxygen lance goes deep into the converter, and the ambient temperature can reach above 2200°C. It is often washed by splashed high-temperature slag and molten steel, which usually leads to gradual damage to the material at the end of the nozzle. In addition, there are problems such as leakage of the oxygen supply pipeline. These problems will cause changes in the gas supply parameters of the oxy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/32C21C5/46G01L11/00
CPCC21C5/32C21C5/4673G01L11/00
Inventor 周泉林李毅挺马永富齐利国董晓光
Owner 河钢乐亭钢铁有限公司
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