A method for on-line monitoring of converter oxygen jet effect

A jet and oxygen technology, applied in measuring devices, manufacturing converters, measuring fluid pressure, etc., can solve problems such as inability to accurately determine the melt loss of nozzles, early off-line of qualified nozzles, and extended use of nozzles, and achieve stable results and real-time data. The effect of tracking and increasing the number of furnaces used

Active Publication Date: 2021-10-19
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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  • A method for on-line monitoring of converter oxygen jet effect
  • A method for on-line monitoring of converter oxygen jet effect
  • A method for on-line monitoring of converter oxygen jet 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 an online monitoring method for the oxygen jet effect of a converter, belonging to the technical field of metal material smelting. The technical solution of the present invention is: set two oxygen jet pressure thresholds, high and low, and use it normally within the range. If it exceeds the specified range, it indicates that the jet is in a specific failure state; if the actual pressure is greater than the first threshold, it indicates that the wear of the end of the nozzle exceeds the standard requirement; If the actual pressure is between the first threshold and the second threshold, it indicates that the jet meets the requirements; if the actual pressure is less than the second threshold, it indicates that there is leakage in the pipeline. The invention realizes online tracking of nozzle parameters, realizes precise design of dynamic oxygen jet flow parameters in automatic steelmaking technology, and can effectively solve the existing technical bottleneck problem in iron and steel enterprises that cannot judge the working conditions of oxygen lance nozzles online.

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 Patents(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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