Method and apparatus for recovering gold

Abstract

Abstract The process comprises the sequential steps of classifying and selecting from gold-bearing siliceous material that fine material which passes a preselected screen, heating or roasting the selected material to a predetermined temperature, dry-air-float concentrating the material, and separating the material by wetfloat slurry means. In practice, it has been found that the steps of heating and dry-air-float concentrating of the material may be performed concurrently. Apparatus includes an inclined frame; a endless pervious belt assembly having a screen layer, a fabric layer and a multiplicity of riffle bars suitably fastened transversely at intervals to the fabric layer, the pervious belt being rectilinearly disposed at an angle coincident with the frame; a plurality of air-float cell assemblies transversely mounted in the frame and having one of the respective walls thereof contiguous with the belt; and a pulsating air supply assembly in communication with each of the respective air-float cell assemblies. In combination with the assemblies above described, the apparatus may be provided with a substantially enclosed housing formed by a multiplicity of abutting transversely mounted reflector assemblies disposed on the frame distally above the endless belt, and a tank assembly mounted on the frame. A heat assembly may be mounted in the housing between the reflector assemblies and the belt.

Inventors

• 👤 W Collins

Bibliographic Details