Assaying method

Details Assaying method Assaying method

2006-06-27

2006-06-27

King, Roy (Department: 1742)

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

C075S633000, C075S637000, C222S590000, C266S227000, C266S236000

Reexamination Certificate

active

07066981

ABSTRACT:
The invention provides a method of assaying a mineral sample for determining the concentration of selected metals in a sample comprising the steps of providing a comminuted mineral sample; mixing such sample with a flux; preheating a reaction vessel to a temperature which approximates the melting point of the flux; introducing the mixture of the mineral sample and flux into the crucible, whereby the mixture is transformed to a molten state to capture the metal to be assayed in a collector material; and separating slag from the collector material.

REFERENCES:
patent: 3652427 (1972-03-01), Flood et al.
patent: 4052197 (1977-10-01), Brotzmann et al.
patent: 4274622 (1981-06-01), Ohmori
patent: 4373705 (1983-02-01), Yamada
patent: 5279644 (1994-01-01), Francisco
patent: 5439503 (1995-08-01), Burr
patent: WO00/26664 (2000-05-01), None
ASTM E-400-92a, Standard Test Method forSpectrographic Analysis of Ores, Minerals, and Rocks by the Fire Assay Preconcentartion Technique, American Society for Testing and Materials, published Sep. 1992.

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