Spontaneous Combustion: R70 Testing
Self-heating poses a significant hazard for both open-cut and underground coal mine operations. One of the major problems facing the coal industry is producing reliable hazard management plans that require identification of the self-heating propensity in advance of mining, during transportation and stockpiling.
- CRL Energy has two dedicated systems on which to carry out the adiabatic test (R70) for the spontaneous combustion of coal;
- A column test facility is in the process of being developed;
- Coals with an R70 value less than 0.5ºC/h = low propensity;
- R70 value between 0.5-0.8ºC/h = medium propensity;
- R70 values > 0.8ºC/h = high propensity, and thus more prone to spontaneous combustions; and
- We have a comprehensive research programme (r70 research page) looking at the spontaneous combustion propensities of New Zealand coals.
Dr Tana Levi
68 Gracefield Road
PO Box 31-244
Lower Hutt 5040
Tel: +64 4 570 3700
Fax: +64 4 570 3701