DC Casting Thermal Imaging for Bleed-Out Prevention
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Solution Overview
Problem
The semi-continuous direct chill (DC) casting process is plagued by 'bleed-out' phenomena, where molten metal spills uncontrollably, posing risks to personnel and causing equipment damage and production downtime, with the underlying mechanisms not fully understood.
Innovation Solution
A method and apparatus utilizing thermal imaging to monitor the temperature of cast products during DC casting, defining three temperature ranges (up to 70°C, 70°C to 90°C, and above 90°C) to control the casting process, with automatic or operator-driven interventions to prevent bleed-outs by maintaining normal operation, indicating maintenance needs, or initiating emergency shutdowns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If DC casting is performed without temperature monitoring, then the casting process is simple and fast, but bleed-out occurs causing personnel risk and equipment damage
Solution Approach 1:
The patent implements a feedback mechanism by using thermal imaging to continuously monitor the temperature of the cast product during DC casting. The system compares the measured temperature against predetermined thresholds and provides feedback signals to control the casting process, thereby preventing bleed-out through real-time temperature-based feedback control.
Solution Approach 2:
The patent replaces traditional mechanical or manual monitoring methods with thermal imaging technology. Instead of using physical sensors or visual inspection, the system uses infrared thermal imaging to non-contactlessly measure the temperature of the cast product, substituting mechanical measurement systems with optical/thermal detection.
2Reliability
If thermal imaging monitoring is implemented, then bleed-out can be predicted and prevented, but the casting apparatus becomes more complex
Solution Approach 1:
The patent introduces thermal imaging technology as an intermediary between the cast product and the control system. The thermal imaging device acts as a mediator that converts thermal radiation from the cast product into temperature data, which then informs the control decisions, thereby enabling safe operation without direct contact or complex mechanical intervention.
3Reliability
If temperature monitoring with multiple thresholds is used, then casting safety is improved, but the measurement and control system becomes more complex
Solution Approach 1:
The patent applies parameter changes by establishing multiple temperature threshold levels (first threshold and second threshold) to classify different risk states. Instead of using a single temperature measurement, the system divides the temperature parameter into distinct ranges that trigger different control actions, thereby improving detection accuracy through parameter segmentation.
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 effectively predicts and prevents bleed-outs, ensuring safer and more efficient casting by reducing the risk of injuries and equipment damage through targeted maintenance and process control based on thermal image analysis.
Implementation Method 1
recording a thermal image of the cast product that is output via the bottom opening
Data Source
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AI summary
A method for casting longitudinal cast products (90) comprising: casting longitudinal cast products (90) in a semi-continuous manner using a DC casting apparatus (10) having a mold (30), wherein the mold (30) has top (31) and bottom (32) openings and is configured to at least partially solidify molten metal that is entered into the mold (30) via the top opening (31) and to output the cast product (90) via the bottom opening (32), recording a thermal image of the cast product (90) that is output via the bottom opening (32), determining at least three non-overlapping temperature ranges comprising a first temperature range, a second temperature range and a third temperature range, determining a peak temperature in the thermal image; comparing the peak temperature with the at least three temperature ranges; and a.) when the peak temperature is comprised in the first temperature range, casting the cast product (90), b.) when the peak temperature is comprised in the second temperature range, displaying an information indicative of a maintenance requirement of the casting apparatus (10) and carrying out maintenance of the casting apparatus (10) after the cast product (90) is cast and before a subsequent casting operation is carried out, c.) when the peak temperature is comprised in the third temperature range, aborting the casting of the currently cast cast product (90) and displaying an information indicative of an emergency shutdown.