Method of and apparatus for extraction of gold from placer grave

Details Method of and apparatus for extraction of gold from placer grave Method of and apparatus for extraction of gold from placer grave

1979-06-20

1981-05-05

Hill, Ralph J.

Classifying, separating, and assorting solids

Stratifiers

With liquid treatment

209 14, 209199, 233 14R, B03B 556

Patent

active

042657431

ABSTRACT:
The present invention relates to a method of extracting gold from placer gravel. Whereas conventional techniques are relatively effective in the processing of coarse gold particles, i.e. plus ten mesh tyler, the present invention finds application in recovery of gold particles of all sizes from submicroscopic through coarse nuggets larger than ten mesh tyler. A rotating sluice box uses centrifugal force to enhance the sluicing process, and a centrifugal amalgamator then extracts gold from the concentrate thus produced, under centrifugal force. Gold is removed from the mercury by conventional techniques.

REFERENCES:
patent: 919894 (1909-04-01), Leavell
patent: 980001 (1910-12-01), Ponten
patent: 1451454 (1923-04-01), Beauchamp
patent: 1673675 (1928-06-01), Hanceau
patent: 2053802 (1936-09-01), Nicol
Taggart, A. F., Handbook of Mineral Dressing, Wiley & Sons Inc. New York, NY, 1945, pp. 2-81 & 2-84.

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