Method and system of measuring pressure loss of converter oxygen lance pipeline

Abstract

The invention relates to the technical field of ferrous metallurgy, in particular to a system and a method of measuring a pressure loss of a converter oxygen lance pipeline. The system and the methodare applicable to measurement of a pressure loss of a 30-400t converter oxygen lance pipeline. The system mainly comprises a gas main pipeline, an oxygen lance branch pipeline, a flow regulating valve, a pressure transmitter, a computer system, an oxygen lance and a throttling head, wherein gas in the gas main pipeline enters the oxygen lance branch pipeline; the pressure transmitter transmits a signal to the computer system to display a pressure value P1 at the oxygen lance branch pipeline; the gas flows though the throttling head; a pressure value P2 displayed by the pressure transmitter mounted on the throttling head can be read on site or displayed by the computer system; and a measured oxygen lance pipeline pressure loss value delta P is equal to P1-P2. The system and the method havethe advantages that the stagnation pressure at an oxygen lance spray head inlet cannot be obtained under a practical production condition, but the stagnation pressure at different oxygen lance spray head inlets can be obtained by measuring the pressure loss; the performance of an oxygen lance gas supply pipeline can be evaluated; and the design of a converter oxygen lance spray head and the operation of an oxygen lance can be optimized.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a system and method for measuring the pressure loss of a converter oxygen lance pipeline, which is suitable for measuring the pipeline pressure loss of a 30-400t converter oxygen lance. Background technique [0002] During the converter steelmaking process, oxygen is sprayed from the gas main pipe through the oxygen lance branch and metal hose, and then through the Laval hole of the oxygen lance nozzle. During this oxygen delivery process, the gas pressure loss is caused by friction and sudden changes in pipe diameter. [0003] The pressure at the inlet of the oxygen lance nozzle is called the stagnation pressure, which is an important parameter in the design of the oxygen lance nozzle and determines the performance of the jet. However, due to the production conditions on site, the specific value of the stagnation pressure cannot be measured and can only be estim...

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Problems solved by technology

[0002] During the process of converter steelmaking, oxygen is sprayed from the gas main pipe through the oxygen lance branch and metal hose, and then through the Laval hole of the oxygen lance nozzle. During this oxygen delivery process, the gas pressure loss is caused by friction and sudden changes in pipe diameter.

[0003] The pressure at the inlet of the oxygen lance nozzle is called the stagnation pressure, which is an important parameter in the design of the oxygen lance nozzle and determines the performance of the jet. However, due to the production conditions on site, the specific value of the stagnation pressure cannot be measured and can only be estimated or ignored. Oxygen lance pipeline pressure loss, and then adjust the oxygen lance operation through the pressure value of the oxygen branch pipeline displayed by the computer in the operating room, so the optimal design of the oxygen lance and the establishment of the most suitable oxygen lance operating system cannot be realized, resulting in an increase in the cost of converter steelmaking and the reduction of molten steel quality

[0004] The current design of the oxygen lance nozzle is based on theory and experience. For the gas supply pipeline of different steel plants and the use of different oxygen lance nozzles, the pressure loss value of the pipeline is different. However, there is currently no effective method to evaluate the pipeline performance and oxygen Gun nozzle design provides accurate data support

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