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Submersed nozzle slag line automatic control method based on molten steel superheat degree

An immersion and superheating technology, applied in the field of iron and steel metallurgical continuous casting, can solve the problems of inaccurate slag line position and inability to meet the surface quality requirements, so as to improve the service life, reduce the cost and improve the quality significantly, and ensure the service time Effect

Active Publication Date: 2020-04-07
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the position of the slag line needs to be determined by measuring two different spatial positions of the tundish and the crystallizer, and the inaccurate position of the slag line is caused by the uncertain deformation of the tundish during use.
At the same time, it does not involve and take into account the dynamic tracking of the slag line position and the automatic adjustment of the slag line according to the degree of superheat, so it cannot meet the current increasing surface quality requirements for continuous casting slabs

Method used

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  • Submersed nozzle slag line automatic control method based on molten steel superheat degree
  • Submersed nozzle slag line automatic control method based on molten steel superheat degree
  • Submersed nozzle slag line automatic control method based on molten steel superheat degree

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Embodiment 1

[0033] Example 1: see figure 1 , figure 2 , a submerged nozzle slag line automatic control method based on molten steel superheat, said method comprising the following steps:

[0034] Step 1: Determine the position of the submerged nozzle slag line;

[0035] Step 2: Slag line automatic control process.

[0036] Described step 1: the location of the slag line of the submerged nozzle is determined, as follows:

[0037] The slag line of the continuous casting submerged nozzle is the position of the slag line where the interface between molten steel and mold slag in the mold is eroded to the submerged nozzle, and the insertion depth is the distance from the upper edge of the side hole of the submerged nozzle to the position of the slag line;

[0038] 1.1 Measure the distance from the upper edge of the nozzle side hole to the upper edge of the copper plate when the pouring position of the tundish car is lowered to the lowest position, and set it as X;

[0039] 1.2 Collect the ...

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Abstract

The invention relates to a submersed nozzle slag line automatic control method based on molten steel superheat degree. The method is characterized by comprising the following steps that 1, the submersed nozzle slag line position is determined; and 2, a slag line automatic control technology is conducted. According to the scheme, the submersed nozzle slag line position is accurately calculated andtracked and automatically and dynamically tracked and adjusted according to the tundish superheat degree at the same time, the using time of the same slag line is taken into account, therefore, the problem that in an original slag line control technology, the continuous casting blank defect occurrence rate rises due to the fact that slag line position measurement is not accurate, and dynamic adjustment is not conducted according to the superheat degree changes is solved, the using time of the same slag line scale is guaranteed at the same time, and the service life of a submersed nozzle is prolonged.

Description

technical field [0001] The invention relates to a control method, in particular to an automatic control method of a submerged nozzle slag line based on the superheat of molten steel, and belongs to the technical field of iron and steel metallurgy continuous casting. Background technique [0002] In the current continuous casting process of the steel industry, the submerged nozzle of the tundish has been widely used. The submerged nozzle of the tundish is an important part in the continuous casting production process, and it undertakes the important technological task of injecting the molten steel from the tundish into the continuous casting mold. It must have the characteristics of resistance to molten steel and slag erosion and erosion, but no matter what kind of material is used, there will be problems of erosion and erosion to varying degrees. In another case, the control of the slag line is actually the control of the insertion depth of the submerged nozzle in the conti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/18
CPCB22D11/181B22D11/182
Inventor 邹世文
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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