Determination of properties of coal
US4959549A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 1989 |
| Grant date | Sep 25, 1990 |
| Priority date | — |
| Expiry date | Apr 17, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/6421
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods and apparatus for determining a property of bulk coal from a fluorescence spectrum of the coal are disclosed. In the methods the coal is illuminated so that a plurality of macerals at the surface of the coal are illuminated with UV light. Intensities of fluorescent light from the coal are determined as a function of wavelength and output signals related to the intensities are derived as a function of wavelength. A property of the bulk coal is then determined by: PA0 (A) PA1 (i) determining amplitudes related to the intensities, of the output signals as a function of wavelength: PA1 (ii) integrating the amplitudes within a selected wavelength region to provide at least one integrated value: PA1 (iii) compring the integrated value with at least one standard integrated value derived from the calibration study of coal; and PA1 (iv) ccalculating quantitatively the property of the bulk coal from the comparison; or PA0 (B) PA1 (i) determining amplitudes related to the intensities, of the output signals as a function of wavelength; PA1 (ii) ratioing the amplitudes within a first selected wavelength region with the amplitudes within a second selected wavelength region to provide a r…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.