Optical Cored Wire Feeding for Accurate Molten Bath Temperature Sensing
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Solution Overview
Problem
Existing methods for determining the temperature of a molten metal bath in a metallurgical vessel face challenges in ensuring accurate measurements across varying conditions, leading to excessive consumption of optical cored wires due to devitrification and require additional equipment for protection and correction.
Innovation Solution
A method involving controlled feeding and retraction of the optical cored wire with specific velocity and depth profiles, ensuring the leading tip remains in optimal condition for temperature measurement with minimal consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the optical cored wire is immersed deeper into the molten metal bath to ensure accurate temperature measurement, then the measurement accuracy is improved, but the consumption of the optical cored wire increases due to increased flotational forces and thermal exposure
Solution Approach 1:
The optical cored wire is fed into the metallurgical vessel before the actual temperature measurement is required. This preliminary feeding ensures that a fresh, unvitrified leading tip is already in position when measurement is needed, reducing the need for deep immersion and subsequent wire consumption during the measurement process itself
Solution Approach 2:
The system dynamically adjusts the feeding rate of the optical cored wire based on real-time conditions. By controlling the feeding velocity to match the consumption rate, the system maintains an optimal immersion depth without requiring excessive deep submersion, thereby reducing overall wire consumption while preserving measurement accuracy
2Reliability
If additional protective equipment and corrective mechanisms are added to prevent devitrification and ensure measurement accuracy, then the reliability of temperature measurement is improved, but the device complexity increases
Solution Approach 1:
The system uses the optical cored wire's own feeding mechanism to maintain its leading tip in an optimal state. By continuously feeding fresh wire at a controlled rate, the system self-corrects for consumption and devitrification without requiring external intervention or additional protective equipment, thereby maintaining reliability while minimizing device complexity
Solution Approach 2:
The system incorporates feedback control by monitoring the position and condition of the optical cored wire leading tip. This feedback enables dynamic adjustment of the feeding rate to compensate for consumption and maintain measurement reliability, replacing the need for complex protective mechanisms with a simpler active control approach
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method allows for accurate temperature determination with minimal optical cored wire consumption by optimizing immersion and retraction phases, maintaining the leading tip's integrity and reducing equipment requirements.
Implementation Method 1
the optical fiber can convey thermal radiation received from the molten metal to a detector, e.g. a pyrometer
Data Source
AI summary
The present invention relates to a method and a system for determining a temperature value of a molten metal bath. The method according to the invention has been proven to be especially suitable for repeated determinations of temperature values; i.e. the method allows for multiple measurements with repeatedly newly generated leading tips of the optical cored wire.