Process for simultaneously leaching and fine milling a subdivide

Details Process for simultaneously leaching and fine milling a subdivide Process for simultaneously leaching and fine milling a subdivide

1990-05-30

1991-04-16

Rosenbaum, Mark

Solid material comminution or disintegration

Processes

With application of fluid or lubricant material

241172, B02C 1716

Patent

active

050075896

ABSTRACT:
A source material in the form of an ore, mineral, concentrate, calcine, or reclaimed tailings is subjected to fine milling in a stirred mill having an impeller rotatable in a grinding chamber filled with grinding media. A slurry of the source material is fed, on a continuous basis, to an inlet to the grinding chamber which is generally at a low level and flows through the chamber and out of an outlet, conveniently an overflow type of outlet. The carrier liquid may be a leach solution and/or oxidizing air or oxygen can be fed to the material as it is being milled. Enhanced recoveries of gold using a cyanide leach solution as the carrier liquid can be achieved using the process.

REFERENCES:
patent: 3149789 (1964-09-01), Szegvari
patent: 4269808 (1981-05-01), Kawabata
patent: 4816234 (1989-03-01), Brison et al.

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