| 摘要 |
PCT No. PCT/GB92/00295 Sec. 371 Date Nov. 5, 1993 Sec. 102(e) Date Nov. 5, 1993 PCT Filed Feb. 20, 1992 PCT Pub. No. WO92/14556 PCT Pub. Date Sep. 3, 1992.In order to sort ore from associated mineral material, a method and apparatus of classifying an object is provided, the method including feeding the object along a feed path, irradiating the object with infra-red radiation of a first wavelength, the radiation of the first wavelength being focussed onto an irradiation zone intersecting the feed path, the irradiation zone having a length in the vertical plane substantially greater than its width in the vertical plane. The intensity of radiation emitted by the object at at least one second wavelength different from the first wavelength is examined, the second wavelength being characteristic of a first class of object or the ore to be sorted from the mineral, whereby the classification of the object may be derived.
|
