Fire refining precious metals asay method

Details Fire refining precious metals asay method Fire refining precious metals asay method

1993-02-18

1994-01-18

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75632, 75633, 75634, 75637, C22B 1102

Patent

active

052796442

ABSTRACT:
A new environmentally safe fire refining precious metal assay method is provided wherein bismuth oxide is used with a special flux composition as the precious metal collector and the cupelling procedure is performed in a controlled temperature range.

REFERENCES:
patent: 4497658 (1985-02-01), Woog

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