US 2020/0261920 A1 · MULTIPLE-STAGE GRINDING CIRCUIT

Abstract

Embodiments include systems and methods for multiple-stage grinding of crushed ore material. A method may comprise separating, in a first stage of separating, crushed ore material by size into a first fines stream and a first coarse stream; grinding the first coarse stream in a second stage of grinding; feeding the product of the second stage of grinding back to the step of separating; feeding the first fines stream from the step of separating to a recovery circuit; producing a rejected stream from the recovery circuit of crushed ore material that does not meet the target mineral size; separating, in a second stage of separating, the rejected stream from the recovery circuit into a second fines stream and a second coarse stream; grinding the second coarse stream in a third stage of grinding; and feeding the product of the third stage of grinding back to the recovery circuit.

Claims15

Dependent claims

A method for multiple-stage grinding, the method comprising:

providing a feed of crushed ore material;
grinding the crushed ore material in a first stage of grinding;
separating, in a first stage of separating, the crushed ore material by size into a first fines stream and a first coarse stream;
grinding the first coarse stream in a second stage of grinding;
feeding the product of the second stage of grinding back to the step of separating;
feeding the first fines stream from the step of separating to a recovery circuit;
recovering, by the recovery circuit, a target mineral size of the crushed ore material to produce a marketable product;
producing a rejected stream from the recovery circuit of crushed ore material that does not meet the target mineral size;
separating, in a second stage of separating, the rejected stream from the recovery circuit into a second fines stream and a second coarse stream;
grinding the second coarse stream in a third stage of grinding;
and
feeding the product of the third stage of grinding back to the recovery circuit.

9 more elements

Dependencies are inferred from the claim text.

Multiple-stage grinding circuit

Life of this patent

Multiple-stage grinding circuit

Life of this patent

Abstract

Claims15