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Control method for RH vacuum processing mode

A light processing and mode technology, applied in the control field of RH light processing mode, can solve the problems of limited model accuracy and poor self-adjustment ability of the model, and achieve the effect of standard operation, convenient automatic control and high automation level

Active Publication Date: 2013-06-19
BEIJING SHOUGANG AUTOMATION INFORMATION TECH +1
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Problems solved by technology

In addition, there are a lot of uncertain factors in the smelting process (such as the influence of the vacuum chamber and ladle sticking cold steel, the initial thermal state of the ladle, etc. on the temperature, etc.), and the self-adjustment ability of the model is poor, which limits the improvement of the model accuracy.

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  • Control method for RH vacuum processing mode

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Embodiment Construction

[0049] In the control method of the present invention, the factors that affect the pre-adjustment of aluminum in the initial adjustment stage of molten steel are divided into two categories, one is that the molten steel [O] is greater than 400ppm when the forecast decarburization ends; the other is that the forecast vacuum end temperature is lower than the target temperature , add aluminum to heat up.

[0050] In addition, when the predicted vacuum end temperature is higher than the target temperature, it is difficult to quantify the temperature drop rate of molten steel due to uncertain factors such as the initial ladle thermal state. The specific implementation manners of the present invention will be described in detail below.

[0051] (1) Smelting furnace number: 121B03523

[0052] Vacuum initial temperature: 1612°C;

[0053] Initial [C] content: 0.051%, initial [O] content: 335ppm, target [C] content: 0.03%;

[0054] Target temperature at the end of vacuum: 1592°C;

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Abstract

The invention belongs to the technical field of RH refining process automatic control, and discloses a control method for an RH vacuum processing mode, which adopts two-stage control software to modeling a charging system and an oxygen blasting system during the initial setting stage of the vacuum processing mode; through data communication between the two-stage control software and a one-stage basic automation control system, automatic control on oxygen blast, steel scrap and aluminum scrap can be realized during the initial setting stage of the vacuum processing mode; and after a control signal is given by the two-stage control software, the one-stage basic automation control system executes the control program as per the parameters transmitted by the two-stage control software, so as to realize automatic control and meets requirements for accurate control on molten steel temperature. The control method has the advantages of normalized production and high automation level.

Description

technical field [0001] The invention belongs to the technical field of automatic control of RH refining process, and in particular provides a control method of RH light treatment mode. Background technique [0002] The RH refining process is a metallurgical method that relies on the pressure difference between the vacuum chamber and the atmosphere to lift the molten steel in the ladle to the vacuum chamber, and continuously circulates the molten steel by blowing argon. Since the operation mode of RH production is relatively standardized, and the automation level of molten steel temperature detection, forecast and control is relatively high, it is convenient to realize automatic refining control on the basis of ensuring the final molten steel temperature and composition. [0003] The RH refining process can be divided into light treatment mode, normal treatment mode, decarburization treatment mode and degassing treatment mode according to different steel requirements. The li...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/00C21C7/072C21C7/10
Inventor 刘丹妹郭亮廖慧陈俊锋蒋学军王贵阳邱成国陈玉鑫黄财德沈会良杨伟强李海森
Owner BEIJING SHOUGANG AUTOMATION INFORMATION TECH