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Determining method for RH vacuum leakage position

A technology for determining the method and location, which is applied in the field of RH vacuum furnace application troubleshooting, can solve the problems of heavy troubleshooting workload, large and complex RH vacuum system equipment, and affecting the normal production of RH, so as to improve the operation rate, reduce the scope of troubleshooting, The effect of reducing the probability of occurrence and expansion of accidents

Inactive Publication Date: 2009-12-09
SHOUGANG CORPORATION +1
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The equipment of the RH vacuum system is huge and complex. Once there is a leakage failure and the low vacuum degree fails to meet the production process requirements, the investigation workload will be heavy, which will affect the normal production of RH.

Method used

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Examples

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Embodiment Construction

[0009] Analysis and judgment of air leakage at the junction of the hot top cover and the vacuum chamber: when the sealing ring of the hot top cover is damaged, the characteristics of the exhaust gas analyzer curve are: the percentage of O2 in the exhaust gas is as high as 15-17%, and the flow rate of the exhaust gas is generally normal 1-4 times, much higher than the exhaust gas flow value under normal conditions. A large amount of air is sucked into the vacuum chamber and discharged together with the exhaust gas. The oxygen contained in this part of the gas is higher than the oxygen content of the exhaust gas generated in the vacuum chamber, thereby increasing the O2 content in the exhaust gas. This is the reason why the oxygen content in the exhaust gas is higher than the normal value. . After replacing the sealing ring, the O2 content in the exhaust gas drops below 10%, and the exhaust gas flow rate returns to the normal range.

[0010] The trend characteristics of air lea...

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Abstract

The invention provides a determining method for RH vacuum leakage position, belonging to the field of RH vacuum furnace application fault resolution. The position of vacuum system leakage can be determined according to different changes of mass flux of tail gas of the vacuum system and percent concentration of O2 and CO in the tail gas by mass; the specific method is to determine the leakage position by the following technical parameters. The method has the advantages of reducing the fault resolution range to determine the fault position and improving the efficiency of leakage resolution. Meanwhile, the method can predetermine occurrence of an accident, reduce probability of occurrence and extension of accidents, and improve the operation rate of the RH vacuum furnace.

Description

technical field [0001] The invention belongs to the technical field of RH vacuum furnace application troubleshooting, and in particular provides a method for determining RH vacuum leakage locations, which is applicable to RH furnace vacuum leakage troubleshooting and is used for quickly checking leakage locations after RH furnace leakage occurs. Background technique [0002] The equipment of the RH vacuum system is huge and complicated. Once there is a leakage failure and the low vacuum degree fails to meet the production process requirements, the investigation workload will be heavy, which will affect the normal production of RH. Contents of the invention [0003] The purpose of the present invention is to provide a method for determining the leak location of RH vacuum, which is applicable to the investigation of RH furnace vacuum leakage faults, and is used to check the leakage location of the vacuum system of RH furnace. Curve features are very effective in troubleshoot...

Claims

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Application Information

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IPC IPC(8): G01M3/26G01N33/00
Inventor 李树森郭亚东王全礼
Owner SHOUGANG CORPORATION
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