Method for determining gold content in gold-containing resin by fire assaying

By using anhydrous ethanol immersion and segmented step-calcination, the problems of easy splashing and large gold loss during the calcination of gold-containing resins were solved, enabling accurate and rapid detection of gold content in gold-containing resins and improving detection efficiency and accuracy.

CN122306532APending Publication Date: 2026-06-30CHANGCHUN GOLD RES INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHANGCHUN GOLD RES INST
Filing Date
2026-06-02
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing fire assay methods for determining the gold content in gold-containing resins suffer from problems such as easy splattering during baking, significant gold loss, poor lead buckle forming, and low measurement accuracy. Furthermore, they cannot balance detection efficiency and precision.

Method used

The cohesive force of gold-containing resin is broken by immersing it in anhydrous ethanol, followed by segmented step-calcination, including pre-drying, carbonization and ashing stages. Then it is mixed with a fire-testing flux and covered with a covering agent, and then melted, ash-blown and separated.

Benefits of technology

It effectively avoids splattering and deflagration during baking, ensuring no gold loss. The lead beads can be smoothly aggregated into dense lead buckles, improving the accuracy and stability of the test, simplifying the operation process, and reducing reagent costs and safety hazards.

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Abstract

This application provides a fire assay method for determining the gold content in gold-containing resin, belonging to the field of precious metal analysis and detection technology. Before fire assay analysis, the gold-containing resin is immersed in anhydrous ethanol. The anhydrous ethanol disrupts the cohesive force of the gold-containing resin, preventing splattering during the roasting stage. After immersion, the resin is transferred to a ceramic boat for staged roasting to ashing, eliminating the influence of particulate carbon on the subsequent fire assay analysis. Finally, the roasted resin is transferred to a clay crucible, where sodium carbonate, borax, lead oxide, silicon dioxide, and flour are added and stirred thoroughly. A covering agent is then applied, followed by melting, ash blowing, and gold separation to determine the gold content in the resin. This method achieves rapid and accurate determination of the gold content in gold-containing resin, improving the accuracy and stability of the detection results.
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