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Method for controlling fluctuation of liquid level of crystallizer

A technology for liquid level fluctuation and crystallization control, applied in the field of metallurgy, can solve problems such as liquid level fluctuation, and achieve the effect of maintaining liquid level and maintaining stability

Inactive Publication Date: 2016-09-21
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a method for controlling liquid level fluctuations in crystallizers, which solves the technical problem of liquid level fluctuations caused by slag line operation in the prior art

Method used

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  • Method for controlling fluctuation of liquid level of crystallizer

Examples

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Comparison scheme
Effect test

example 1

[0042] Use the method of increasing the immersion depth.

[0043] The specific operation steps are as follows: when continuous casting of 10 batches of ultra-low carbon steel is carried out, the water change port operation is performed in the 6th furnace. The casting time of each furnace is 30 minutes. When the casting section is 230mm×1600mm, the casting speed is 1.2m / min. The depth is 145mm, and the fluctuation range of immersion depth is in the range of 135-155mm.

[0044] When casting for 45 minutes, the immersion depth was increased by 3 mm, and the immersion depth was 142 mm; when casting was 90 minutes, the immersion depth was reduced to 145 mm for casting; when casting 135 minutes, the immersion depth was increased by 3 mm, and the immersion depth was 142 mm; when casting 180 minutes, the water port was changed in the sixth furnace operate.

example 2

[0046] Use the method of lowering the immersion depth.

[0047] When continuous casting of 10 heats of ultra-low carbon steel is carried out, the water outlet operation shall be carried out in the 6th heat. The casting time of each heat is 30 minutes. The depth fluctuation range is in the range of 145-165mm.

[0048] When casting for 45 minutes, the immersion depth is increased by 3mm, and the immersion depth is 152mm; when casting is 90min, the immersion depth is adjusted to 155mm for casting; when casting is 135min, the immersion depth is increased by 3mm, and the immersion depth is 152mm; when casting is 180min, it is carried out in the sixth furnace Change water port operation.

[0049] It is not difficult to see that when performing a casting operation task, the depth adjustment maintains a uniform adjustment trend, that is, any one of the immersion depth adjustment or the lower immersion depth adjustment is adopted; that is, the immersion depth is restored in a period o...

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Abstract

The invention belongs to the technical field of metallurgy and discloses a method for controlling fluctuation of the liquid level of a crystallizer. The method comprises the steps that a tundish supporting oil cylinder acts, and a submersed nozzle executes initial immersion at the initial immersion depth; and 45 minutes are considered as a cycle, and the immersion depth of the submersed nozzle is adjusted, wherein the adjustment range of the immersion depth of the submersed nozzle is 3 mm at the maximum. The step of adjusting the immersion depth of the submersed nozzle comprises the sub-steps that the tundish supporting oil cylinder acts, and the immersion depth of the submersed nozzle is increased or decreased at the constant speed. By means of the method, the effect of stabilizing the liquid level of the existing crystallizer for continuous casting is achieved.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for controlling liquid level fluctuations in crystallizers. Background technique [0002] The liquid level of the mold fluctuates greatly, and the mold slag in the mold will have a serious slag entrainment phenomenon, and the inclusions are difficult to float up in the mold and solidify in the slab. Obtain high-quality billets. [0003] Factors affecting the liquid level fluctuation of the crystallizer include casting speed, nozzle outlet angle, immersion depth, blowing Ar amount, etc. The slag line operation also has a certain influence on the liquid level fluctuation. The slag line operation refers to adjusting the immersion depth of the submerged nozzle by adjusting the height of the two supporting cylinders of the tundish, so that the position of the slag line of the submerged nozzle changes with the height of the tundish. [0004] In the prior art, the operatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/18
CPCB22D11/18
Inventor 罗衍昭李海波庞在刚倪有金裴兴伟朱建强干明崔阳吴友谊马威王东胡卫东赵东伟马文俊尹娜
Owner SHOUGANG CORPORATION
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