An automatic control method for submerged nozzle slag line based on molten steel superheat
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 unsatisfactory surface quality requirements, etc., and achieve the effect of increasing service life, reducing costs and improving quality significantly
Active Publication Date: 2021-07-09
SHANGHAI MEISHAN IRON & STEEL CO LTD
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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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Embodiment 1
[0032] Embodiment 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:
[0033] Step 1: Determine the position of the submerged nozzle slag line;
[0034] Step 2: Slag line automatic control process.
[0035] The details of step 1 are as follows. The position of the slag line of the continuous casting submerged nozzle is the eroded part of the interface between molten steel and mold slag liquid slag in the mold, 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. ;
[0036] 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;
[0037] 1.2 Collect the liquid level value in the actual pouring process, that is, the distance from the edge of...
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The invention relates to an automatic control method for slag line of an immersed nozzle based on the superheat degree of molten steel. The scheme accurately calculates and tracks the position of the slag line of the submerged nozzle, and at the same time automatically and dynamically tracks and adjusts the position of the slag line of the submerged nozzle according to the superheat of the tundish, taking into account the service time of the same slag line, thus solving the slag line of the previous slag line control technology. The position measurement part is accurate, and there is no hidden danger of increasing the occurrence rate of continuous casting billet defects caused by dynamic adjustment according to the change of superheat.
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...
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IPC IPC(8): B22D11/18
CPCB22D11/181B22D11/182
Inventor 邹世文
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD