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Research on Optimization and Control of the Casting Speed for the Billet Caster

Author: WangZuo
Tutor: XieZhi
School: Northeastern University
Course: Measuring Technology and Instruments
Keywords: Secondary cooling water distribution Solidification and heat transfer model Effective casting speed Superheat Best casting speed Water distribution model optimization
CLC: TF341.6
Type: Master's thesis
Year: 2009
Downloads: 64
Quote: 0
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Abstract


Concaster cold water distribution slab quality is closely related to the casting speed is a major factor to affect the secondary cooling water , caster casting speed optimization in continuous casting secondary cooling control system based on the casting speed feedforward control improve slab quality is of great significance . Billet Caster object of study , combined with actual production , effective control and optimal control of secondary cooling water distribution model optimization based on the pulling speed , superheat casting speed study . Numerical simulation of solidification heat transfer model based on the actual casting of the continuous casting machine parameters through the slab , a detailed analysis of the impact of changes in casting speed and the amount of cold water and superheat the slab surface temperature and shell thickness , determined to cast the machine pulling speed optimization with the content and methods of control . For casting speed unsteady production status appear frequent fluctuations effectively casting speed control model , when the casting speed occurrence of mutations , effectively pulling speed instead of real-time pull speed involved in secondary cooling with water calculation and programming of the PLC to achieve effective pulling speed control . Found : effective casting speed in the secondary cooling water distribution calculation , can be effective in reducing the slab surface temperature fluctuations due to changes in casting speed caused by solidification and heat transfer model simulations . Caster mold level control by Stopper , superheat introduced to the optimal control of the pulling speed . Meet crystallization at the outlet of the shell thickness requirements by solidification and heat transfer model calculation to determine the best correspondence between superheat and casting speed , and on the PLC programming to achieve optimal control of the pulling speed . Found at the site of application according to the optimal control models based on the pulling speed , superheat , the caster casting speed in accordance with the best relationship with superheat changes reduce the impact of the change of superheat slab quality . According to the casting speed and superheat strand solidification process , the establishment of a control model based on the amount of cold tundish superheat and casting speed , superheat changes calculated by solidification and heat transfer model simulations , the slab to reach the target temperature cold For paragraphs water determine superheat and casting speed with two cold water relations . : Superheat and casting speed amount of cold water control model can reduce the the slab temperature changes due to superheat and casting speed changes caused by water optimization model before and after the slab temperature changes .

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CLC: > Industrial Technology > Metallurgical Industry > Metallurgical machinery,metallurgical production automation > Steel-making machinery and production automation > Steel-making machinery > For continuous casting equipment
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