| 摘要 |
Excavated ore or similar material is sorted at the stage when it is still in blocks in order to remove gangue material and, thus, to avoid further processing of such material. Pieces or rocks of the material are analyzed individually according to the capture-gamma method as regards at least one element contained in the pieces, and sorting is performed mechanically subsequently to the analysis. The analyser may be positioned immediately after a first crusher in the sorting line and it may comprise essentially a neutron source and a gamma-radiation detector positioned on the opposite side of a vertical pipe through which the pieces fall. |
