Method and apparatus for particle size determination in a host material
US4453226A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 1981 |
| Grant date | Jun 5, 1984 |
| Priority date | — |
| Expiry date | Jul 15, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/222
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for determining the size distribution of certain particles, of a particular composition, such as iron sulfide (pyrites), in a sample of host material, such as coal. Data representative of the amount of at least one predetermined elemental constituent of the particles is obtained for each of numerous similarly-sized subsamples of the sample. The "constituent amount" data for each subsample is sorted into bins, each representative of a respective constituent amount range in a series of constituent amount ranges. Respective scaler representations of the fraction of the constituent amounts, represented by each bin range, are provided to yield an approximate representation of the distribution function of the amounts of the constituent in the subsamples of the coal. Those scaler representations collectively may provide a histogram. A selected multi-parameter distribution function, such as joint distribution function using both Gaussian and Poisson distributions, is fitted to the peaks of the binned grouping of representations forming the histogram, as by a least squares fitting technique, to obtain a best fit. The resulting values for two or more of the parameters …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.