Systems and methods for performing laser-induced breakdown spectroscopy measurements on molten metal samples - Patents.com

JP2024536735A5Pending Publication Date: 2025-09-17DTE EHF
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Patent Information

Application Number
JP2024515088
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2021-09-08
Filing Date
2022-09-07
Publication Date
2025-09-17

AI Technical Summary

Technical Problem

Current methods for chemical analysis of molten metals, such as spark atomic emission spectroscopy, are prone to errors due to sample preparation issues and require extensive time for analysis, making them inaccurate and inefficient for real-time monitoring in industrial settings like primary aluminum smelters.

Method used

A LIBS system that monitors the temperature of molten metal samples during passive cooling and initiates measurements when temperature criteria are met, using a portable setup with integrated calibration, ensuring consistent and rapid chemical analysis without active heating, thus reducing measurement errors.

Benefits of technology

The system enables accurate, real-time, and in-situ chemical analysis of molten metals with reduced errors, facilitating fast and consistent results across multiple samples, suitable for battery-powered implementations in challenging industrial environments.

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Abstract

A LIBS measurement system is disclosed that is configured to monitor the temperature of a molten metal sample (10) in a crucible (20) during cooling of the molten metal sample and to initiate a LIBS measurement after the temperature of the molten metal sample meets a measurement temperature criterion. The system may also monitor the temperature of an empty crucible to assist in ensuring that the crucible temperature is (i) high enough to ensure that a sufficiently low cooling rate of the molten metal sample occurs during the LIBS measurement after the molten metal sample is delivered to the crucible and cooled to meet the measurement temperature criterion, and (ii) optionally low enough to meet the measurement temperature criterion and avoid unnecessarily long cooling times of the molten metal sample before the start of the LIBS measurement. The LIBS measurement system may be mobile and battery powered and may include an integrated calibration section (500).
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