An automatic control method for preventing continuous casting mold from spilling steel

A continuous casting mold and mold technology, applied in the field of steel continuous casting, can solve the problems of unmanned casting, equipment burning and expansion, etc., to achieve advance prediction and automatic disposal, minimize accident losses, The effect of removing important constraints

Active Publication Date: 2021-02-05
SHANGHAI MEISHAN IRON & STEEL CO LTD
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Problems solved by technology

If a continuous casting steel overflow accident occurs, and personnel cannot rush to the scene for disposal in time, the accident will be enlarged due to the untimely disposal of overflow steel, such as continuous burning of equipment, explosion of overflow steel, continuous casting stagnation, etc. Vicious production Accidents and safety incidents happen
This is also an important restrictive factor for continuous casting to be unable to realize unmanned steel pouring

Method used

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  • An automatic control method for preventing continuous casting mold from spilling steel

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Embodiment Construction

[0025] see figure 1 ,

[0026] In this example:

[0027] The mold length of the casting machine is 900mm, so the pre-set upper limit value Y1 of mold overflow steel is 860mm, and the trigger value Y2 of steel overflow is 880mm;

[0028] The molten steel flow control method of the crystallizer is stopper rod control flow plus blind plate emergency cut-off control method;

[0029] The allowable minimum casting speed value set by the process is 0.3m / min;

[0030] When the process is capped, the stop height in the crystallizer is 0.4m;

[0031] Take the above continuous casting machine parameters as an example:

[0032] An automatic control method for preventing continuous casting mold steel overflow, the method comprising:

[0033] 1. Mold overflow triggers early warning stage:

[0034] 1.1 Set the early warning upper limit value Y1=860mm and trigger value Y2=880mm of mold overflow steel

[0035] 1.2 Collect the parameter value W of the molten steel height of the mold, and...

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Abstract

The invention relates to an automatic control method for preventing steel overflow in a continuous casting crystallizer. The method of the present invention includes: 1. Trigger early warning stage of mold overflow steel: 1.1 set mold overflow steel early warning upper limit Y1 and overflow steel trigger value Y2; 1.2 collect mold molten steel height parameter value W; 1.3 collect casting machine real-time pull Speed ​​parameter V; 1.4 When the mold molten steel height parameter W1>Y1, and the mold molten steel height parameter value W2 after 500 milliseconds is also greater than Y1, the early warning control of mold overflow steel is triggered; 1.5 Control the flow control mechanism to continue emergency shutdown; 1.6 Continue Real-time collection of mold molten steel height parameter value W3, if W3>Y2, then enter the next stage; 2. Automatic disposal stage after steel overflow triggers: 2.1 Start sound and light alarm, and record the streamline length L of the casting machine at this time as L0 ; When performing capping and final pouring, park the tail billet at Y3, judge if L‑L0>Y3, stop the machine, and the automatic disposal of overflowing steel ends. The invention solves the hidden danger of steel overflow accidents when the continuous casting pouring site is unattended.

Description

Technical field: [0001] The invention relates to an automatic control method for preventing steel overflow in a continuous casting crystallizer, and belongs to the technical field of continuous casting of iron and steel. Background technique: [0002] In the continuous casting production process, the continuous casting steel overflow accident refers to the process of injecting molten steel into the crystallizer through the submerged nozzle in the normal tundish. An abnormality in the casting machine itself caused the molten steel in the mold to overflow from the mold. Continuous casting steel overflow accident is the most serious production accident in continuous casting production. Every time a steel overflow accident occurs, the continuous casting production will be interrupted, the equipment will be seriously damaged and replaced, and the serious one will cause a larger fire accident or even cause personal injury. [0003] Steel overflow accidents in continuous casting ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/18
Inventor 邹世文赵建强夏建超曾昌富郑雷
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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