Scale control in gold and silver mining heap leach and mill wate

Details Scale control in gold and silver mining heap leach and mill wate Scale control in gold and silver mining heap leach and mill wate

1992-10-15

1994-11-29

Lovering, Richard D.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ib metal

252180, 210700, 210701, 203 7, C02F 514

Patent

active

053688309

ABSTRACT:
Calcium carbonate scale deposits, occurring in gold and silver mining involving the cyanidation process which utilizes heap and vat leaching, and carbon-in-pulp, carbon-in-leach, particularly activated carbon separation columns; said scale deposits forming on the carbon surfaces and in the emitters and sprinklers of the heap leaching system, are controlled using polyether polyamino methylene phosphonates, which provide effective inhibition despite the severe conditions encountered in these systems, including very high pH's.

REFERENCES:
patent: 4867882 (1989-09-01), O'Neill et al.
patent: 4931189 (1990-06-01), Dhawan et al.
patent: 4971625 (1990-11-01), Bahr
patent: 5087376 (1992-02-01), Bendiken et al.
patent: 5112496 (1992-05-01), Dhawan et al.
patent: 5262061 (1993-11-01), Gill et al.
patent: 5300231 (1994-04-01), Cha

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