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Slab continuous-casting bleedout forecast control method

A slab continuous casting and control method technology, which is applied in the field of slab continuous casting breakout forecast control, can solve the problems that slag rolling cannot be predicted in time, and the interference factors are not fully considered, so as to achieve the effect of avoiding bonding breakout

Active Publication Date: 2008-12-31
SHANGHAI MEISHAN IRON & STEEL CO LTD
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Problems solved by technology

[0006] The purpose of the present invention is to provide a slab continuous casting breakout forecast control method, which mainly solves the problem that the existing various breakout forecasting methods are not comprehensive enough to consider the interference factors and cannot timely predict small-scale bonding and slag entrainment technical problem

Method used

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  • Slab continuous-casting bleedout forecast control method
  • Slab continuous-casting bleedout forecast control method
  • Slab continuous-casting bleedout forecast control method

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Embodiment Construction

[0035] Combined with the specific conditions of the slab continuous casting machine, the outlet of the mold is 220mm×1340mm, and the thermocouple installation position of the mold is 6 in each row on the wide side, and one in each row on the narrow side, a total of two rows. The layout of the thermocouples on the wide side is as follows image 3 , the first row of thermocouples is 200 mm away from the top of the crystallizer, the distance between the two rows of thermocouples is 200 mm, and the maximum casting speed of the casting machine is 2.4 meters.

[0036] refer to figure 1 , the capture of typical temperature features includes the following steps:

[0037] 1. Initialize internal variables;

[0038] 2. Read the process parameters, including the steel type and its temperature fluctuation limit range;

[0039] 3. Receive on-site data, including steel code, mold liquid level, casting speed, and temperature of each thermocouple;

[0040] 4. Calculate the recent temperatur...

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Abstract

The invention relates to a method for predicting and controlling slab continuous casting breakout, in particular to a method for preventing sticking breakout according to the temperature variation condition of a thermocouple in a crystallizer in the process of slab continuous casting. The method mainly aims at solving the technical problems that the existing various breakout prediction methods can not compressively consider interference factors and can not predict small-scale sticking and slag entrapment in time. The technical proposal of the invention is that the method for predicting and controlling the slab continuous casting breakout comprises the step that lines of thermocouples are arranged on the crystallizer, and the method is characterized by comprising the following steps: a. capture of typical temperature characteristics: the typical temperature characteristics of each thermocouple is determined according to the crystallizer parameters and the installment location of the crystallizer on the thermocouple; b. determination of breakout probability: the breakout probability of each thermocouple is determined according to the typical temperature characteristics of the adjacent thermocouples as well as the characteristics of the breakout thermal conductance and abnormal temperature distribution; c. control of casting speed: when the breakout probability of the thermocouples is up to 95%, the casting is stopped. The method is mainly used for warning continuous casting breakout.

Description

Technical field: [0001] The invention relates to a slab continuous casting breakout forecast control method, in particular to a method for preventing bonded breakouts from occurring according to temperature changes of crystallizer thermocouples during the slab continuous casting process. Background technique: [0002] Stable continuous casting production and slab quality assurance are two important tasks of continuous casting research work. In continuous casting production, steel breakout is the most harmful production accident. It not only directly reduces production, but also affects The whole steelmaking production plan, and constitute a certain harm to the crystallizer and the roller table, indirectly affect the quality of the slab, so breakout has always been a major factor affecting the continuous casting production and equipment life. In the breakouts caused by various reasons, the cohesive breakouts account for the vast majority. The cohesive breakouts are first caus...

Claims

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Application Information

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IPC IPC(8): B22D11/18
Inventor 田建良李卫东
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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