Hot-Rolled Steel Temperature Control Across Induction Heating Stages
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Solution Overview
Problem
Existing systems for hot-rolled steel plants do not accurately determine temperature distribution inside steel materials when they arrive at the delivery side of induction heating apparatuses, leading to inconsistent temperature variations before finishing mills.
Innovation Solution
A system with extraction, entry-side, and delivery-side temperature computation units using finite difference or finite element methods to compute and adjust temperature distributions based on data from thermocouples, ensuring accurate temperature assessment and uniformity at the induction heating apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If temperature distribution is not computed at multiple stages (extraction, entry-side, delivery-side), then the system is simpler, but temperature variations inside the steel material cannot be accurately reduced before arriving at the finishing mill
Solution Approach 1:
The temperature computation process is segmented into three distinct computation units: extraction temperature computation unit, entry-side temperature computation unit, and delivery-side temperature computation unit. Each unit computes temperature distribution at a specific stage, allowing detailed monitoring without requiring a single complex comprehensive system.
Solution Approach 2:
The extraction temperature computation unit computes temperature distribution in advance when the steel material is extracted from the heating furnace. This preliminary computation provides initial data that is then used by subsequent computation units, enabling proactive temperature management rather than reactive adjustments.
2Reliability
If induction heating settings are made without accurate temperature distribution data, then the control process is faster, but temperature variations inside the steel material are not reduced
Solution Approach 1:
The three computation units operate continuously and sequentially throughout the steel material processing journey. The extraction temperature computation unit starts computing when material is extracted, the entry-side unit computes when it arrives at the induction heating apparatus entry, and the delivery-side unit computes at the delivery side, ensuring continuous temperature monitoring without interruptions.
Solution Approach 2:
Temperature distribution is computed in advance at each stage, allowing induction heating settings to be made based on predicted temperature distributions before the steel material actually arrives at each location, enabling proactive rather than reactive control.
3Manufacturing precision
If detailed temperature distribution computation is implemented at all stages, then temperature variations are accurately reduced, but the system complexity and computational requirements increase
Solution Approach 1:
The control system is divided into three specialized computation units, each handling temperature computation for a specific stage and location. This segmentation allows each unit to be optimized for its specific function rather than requiring a single monolithic complex system to handle all computations.
Solution Approach 2:
Each computation unit is tailored to compute temperature distribution characteristics specific to its stage: the extraction unit focuses on initial temperature distribution from the heating furnace, the entry-side unit focuses on temperature at the induction heating apparatus entry, and the delivery-side unit focuses on final temperature distribution. This local specialization improves precision without requiring uniform complexity throughout the entire system.
Data Source
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AI summary
Provided is a system for controlling a hot-rolled steel plant capable of accurately ascertaining temperature distribution inside a steel plate when a steel material arrives at a delivery side of an induction heating apparatus. A system for controlling a hot-rolled steel plant is provided with: an extraction temperature computation unit for computing the temperature distribution inside the steel material when the steel material is extracted from a heating furnace; an entry-side temperature computation unit for computing, on the basis of the temperature distribution inside the steel material computed by the extraction temperature computation unit, the temperature distribution inside the steel material when the steel material arrives at an entry side of the induction heating apparatus disposed on a delivery side of the heating furnace; and a delivery-side temperature computation unit for computing, on the basis of the temperature distribution inside the steel material computed by the entry-side temperature computation unit, the temperature distribution inside the steel material when the steel material arrives at a delivery side of the induction heating apparatus.