Fire assay clay crucible is a refractory container designed specifically for fire assay analysis, mainly used for the smelting, separation, and enrichment processes of precious metals such as gold and silver. It has excellent high temperature resistance, thermal shock resistance, and chemical stability, and is a key consumable to ensure accurate and reliable analysis results.
Core features and parameters
Fire assay clay crucibles are usually made of refractory clay, mullite and other materials
The core performance parameters are as follows:
High temperature resistance: The highest refractory temperature can reach 1300 ℃ to 1580 ℃
Capable of withstanding high temperature environments during fire assay analysis.
Thermal shock resistance and stability: It has good thermal stability, a small coefficient of expansion, can resist rapid heating and cooling, and is not easy to crack
Chemical inertness: It has good corrosion resistance to melted substances, does not hang on walls, does not fall off slag, and does not contain interfering elements such as gold and silver, which helps to ensure the purity of laboratory results
Service life: High quality crucibles can be reused multiple times, ordinary models can be used 2-3 times, and export standard models can be used 4-5 times
Main purpose
Fire assay clay crucibles are widely used in metallurgy, casting, chemical analysis, and other fields, with specific applications including:
Fire assay analysis: This is its main use for melting samples containing gold and silver, achieving the separation and quantification of precious metals
Metal melting: suitable for melting and refining non-ferrous metals and their alloys such as gold, silver, copper, iron, etc
Laboratory testing: as a key experimental consumable for mining laboratories, mineral analysis, and third-party testing institutions
Precautions for use and selection
Usage specification: The new crucible should be slowly baked to about 500 ℃ before use; The addition of materials should not be too full to avoid thermal expansion leading to cracking; Suitable tools should be used when extracting molten metal to avoid damage from local stress
Key points for selection: You can choose according to the capacity (such as 30ml to 1113ml, etc.), specific experimental temperature requirements, and budget. Some suppliers support customization
Maintenance and storage: After use, it should be placed in a dry place to prevent rainwater from entering and extend its service life
High quality clay crucibles are the foundation for obtaining precise fire assay analysis data, and users can choose products with corresponding specifications and performance according to specific experimental requirements.
