Method and apparatus for the calculation of coal ash fusion values
US7885772B2 · kind B2 · utility
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Key dates
| Filing date | Nov 9, 2007 |
| Grant date | Feb 8, 2011 |
| Priority date | — |
| Expiry date | Apr 16, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N31/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The IT and FT values for coal and coke samples can be accurately predicted by applying equations to determine ST and HT temperatures. For reducing atmospheres, the equations are IT=C1×ST−C2×HT+C3 and FT=C4×HT−C5×ST+C6. For oxidizing atmospheres, the equations are IT=C7×ST−C8×HT+C9 and FT=C10×HT−C11×ST+C12. IT is the initial deformation temperature. ST is the softening temperature. HT is the hemispherical temperature. FT is the fluid temperature. C1-C12 are constants determined by multi-linear regression coefficient analytical techniques on a collection of data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.