公开(公告)号：US11420211B2

公开(公告)日：2022-08-23

申请号：US16762882

申请日：2017-12-29

Applicant: Fluor Technologies Corporation

Inventor： Mark Sherman

IPC: B02C23/38 ,  B02C23/12 ,  B02C23/14 ,  B02C23/22

Abstract: A method includes 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.