1. Effect of moisture content on the R70 self-heating rate of Callide coal
- Author
-
Basil Beamish and Garth R. Hamilton
- Subjects
Moisture ,Chemistry ,business.industry ,Stratigraphy ,Coal mining ,Evaporation ,Mineralogy ,chemistry.chemical_element ,Geology ,Soil science ,complex mixtures ,Fuel Technology ,Economic Geology ,Coal ,business ,Self heating ,Water content ,Spontaneous combustion ,Carbon - Abstract
Strip samples from the Boundary Hill pit at Callide have been tested in an adiabatic oven to assess the effect of moisture on the R-70 self-heating rate of coal. The two strip samples tested had R-70 self-heating rate values of 10.23 and 8.61 degrees C/h. As the moisture content of the coal was progressively increased, from the dry state of the test, the R-70 value decreased dramatically. At approximately 40-50% of the moisture holding capacity of the coal, the self-heating rate becomes measurable. Above this critical level of moisture content, the heat produced by oxidation is dissipated by moisture evaporation and coal self-heating is significantly delayed. (c) 2005 Elsevier B.V All rights reserved.
- Published
- 2005