|
| Enhanced pre-concentration and waste removal from low-grade copper-polymetallic sulfide ore using a combined magnetic separation-XRT process |
|
Received:February 14, 2025
Revised:April 16, 2025
Accepted:June 10, 2025
Published Online:April 30, 2026
|
| View Full Text View/Add Comment Download reader |
| DOI：10.3969/j.issn.1005-7854.2026.01.009 |
| KeyWord:low-grade copper ore;X-ray transmission (XRT) sorting;magnetic separation;pre-concentration and waste removal;combined sorting |
|
| BGRIMM Machinery and Automation Technology Co Ltd, Beijing 100160, China |
| Hits: 83 |
| Download times: 16 |
| Abstract: |
| This study investigates the feasibility of pre-concentration and waste removal for a low-grade complex polymetallic sulfide ore (with 0.195% Cu and 12.83% Fe) based on its process mineralogy and X-ray transmission (XRT) imaging characteristics. Results indicate that the valuable minerals are coarsely disseminated, exhibiting massive and banded structures. The ore contains pyrrhotite, and a clear association exists between Cu and Fe elements, providing favorable conditions for pre-concentration. Single XRT sorting tests demonstrated that at a waste rejection rate of 30.96%, the Cu grade in the tailings decreased to 0.058%, while the Cu recovery in the concentrate reached 90.24%, confirming the ore's amenability to XRT sorting. Magnetic separation tests revealed the ore's weak magnetic properties; although high-intensity magnetic separation could yield a partial high-Cu product, single magnetic separation alone showed limited effectiveness for waste removal. Further tests employing a combined magnetic separation and XRT sorting process increased the Cu recovery to 93.20%, representing an improvement of approximately 3 percentage points compared to single XRT sorting. The combined process proves more effective for pre-concentration, waste removal, and copper recovery. |
| Close |
|
|
|