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Gas leakage detection and argon blowing flow correction method of argon blowing inlet pipeline of ladle ventilating upper nozzle block

A technology of argon blowing flow rate and air intake pipeline, which is applied in the field of gas leakage detection and argon blowing flow correction of the argon blowing intake pipeline of the ventilating upper nozzle block of the ladle. The effect of argon metallurgy, reducing the weight of inclusions, and reducing the amount of molten steel pouring

Active Publication Date: 2022-04-29
LAIWU STEEL YINSHAN SECTION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a gas leakage detection and argon blowing flow correction method of the argon blowing intake pipeline of the ventilating upper nozzle block of the ladle, which can solve the argon blowing flow rate caused by the leakage of the argon blowing intake pipeline in the prior art Control inaccurate problems, improve the metallurgical effect of argon blowing, and reduce the temperature drop of molten steel

Method used

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  • Gas leakage detection and argon blowing flow correction method of argon blowing inlet pipeline of ladle ventilating upper nozzle block
  • Gas leakage detection and argon blowing flow correction method of argon blowing inlet pipeline of ladle ventilating upper nozzle block
  • Gas leakage detection and argon blowing flow correction method of argon blowing inlet pipeline of ladle ventilating upper nozzle block

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Embodiment 1

[0035] Such as Figure 1-Figure 3 Shown is an argon-blowing air intake pipeline of a ventilating upper nozzle block of a ladle and its air leakage detection and correction method. , Measure the air leakage. Under the condition of small air leakage, you can use not to deal with the air leakage point, and set the argon blowing flow determined through creative labor + measured air leakage as automatic or manual argon blowing control flow.

[0036] The ladle air-permeable upper nozzle block described in this embodiment refers to the ladle microporous ceramic rod air-permeable upper nozzle seat brick disclosed in Chinese patent CN111774560A.

[0037] Such as figure 1 with image 3 As shown, the argon blowing control system of the present invention includes a touch screen 5, a programmable logic controller PLC 6, a signal lamp 4, a continuous casting basic automation system and a molten steel weighing system in a ladle. The programmable logic controller PLC is respectively connec...

Embodiment 2

[0065] The ventilating upper nozzle seat brick of the ladle described in this embodiment is the diffuser ring ventilating nozzle seat brick of the ladle in the Chinese patent CN109732074A.

[0066] When the argon blowing argon blowing air intake line of the ladle ventilating upper nozzle block described in this embodiment and its air leakage detection and correction method are applied to the argon blowing control of the ladle ventilating upper nozzle block with an average steel output of 135 tons, through creative labor Simulation research and application practice verify the various stages of the continuous casting ladle pouring process and the optimal argon blowing flow rate, specifically:

[0067] S1. In the early and mid-stage of continuous casting ladle pouring process, the best stage of inclusion removal rate and the best argon blowing flow rate: the weight of remaining steel in the ladle after the ladle starts pouring and normal downflow is 2 / 3 of the weight of molten ste...

Embodiment 3

[0076]The argon blowing inlet pipeline in this embodiment is the same as that in Embodiment 1. The gas leakage detection and argon blowing flow correction method of the argon blowing inlet pipeline of the ladle breathable upper nozzle block in this embodiment includes the following steps:

[0077] (1) Carry out air leakage detection on the argon blowing inlet pipeline, and measure the air leakage amount: use the argon blowing control system to manually open the third manual ball valve 8c at the inlet of the gas source, the first manual ball valve 8a at the outlet A of the gas source, The second manual ball valve 8b at the outlet B of the gas source manually closes the manual limit ball valve 8d on the air intake pipe of the ladle ventilating upper nozzle seat brick laid by the rotary arm A of the continuous casting ladle rotary table and the ladle ventilating upper layer laid by the rotary arm B The manual limit ball valve 2 8e on the intake pipe of the nozzle seat brick. On t...

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Abstract

The invention relates to a gas leakage detection and argon blowing flow correction method of an argon blowing intake pipeline of a ventilating upper nozzle block of a ladle. The argon blowing inlet line of the ladle venting upper nozzle seat brick includes a main gas source circuit for supplying argon, a first automatic branch circuit and a second automatic branch circuit for automatic argon blowing, and a second automatic branch circuit for manual argon blowing. The first manual bypass and the second manual bypass communicate with each gas path through the gas bus bar. The present invention first detects the gas leakage of the argon blowing intake pipeline, measures the gas leakage of the argon blowing gas intake pipeline, and then sets the sum of the set argon blowing flow rate and the measured gas leakage volume as the manual mode or the automatic mode. The flow rate is controlled by argon blowing, so as to solve the problem of inaccurate flow control of argon blowing caused by air leakage in the argon blowing inlet pipeline in the prior art, improve the metallurgical effect of argon blowing, and reduce the temperature drop of molten steel.

Description

technical field [0001] The invention relates to the technical field of steelmaking process in iron and steel metallurgy, in particular to a gas leakage detection and argon blowing flow correction method of an argon blowing inlet pipeline of a ventilating upper nozzle block of a ladle. Background technique [0002] During the pouring process of the continuous casting ladle, blowing argon to the ventilating upper nozzle block of the ladle can promote the floating and removal of inclusions in the early and middle stages of the pouring process, and inhibit the eddy current slag in the late pouring process, thereby improving the cleanliness of molten steel and reducing the ladle pouring allowance. However, in the actual production process, it was found that the existing argon blowing process had the following problems: First, the gas leakage detection and argon blowing correction of the argon blowing inlet pipeline were not carried out, and the flow control of argon blowing was in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/117B22D11/16B22D41/58
CPCB22D11/117B22D41/58B22D11/16
Inventor 武光君王中学武文健
Owner LAIWU STEEL YINSHAN SECTION CO LTD
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