Rapid measurement of coal oxidation
AssigneeThe University of Queensland
InventorsYongjun PENG, Xumeng CHEN
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Abstract
The present invention relates to a method for determining oxidation of coal, the method comprising: a) mixing a coal sample with an organic solvent and an inorganic solvent, to extract oxidised coal species from the coal sample into a liquid phase, and b) analysing the liquid phase from step (a) to determine a degree of coal oxidation. The inorganic solvent may comprise an inorganic compound such as a pyrophosphate. The present invention also relates to a method for controlling collector used in a coal flotation process, the method comprising determining a degree of oxidation of coal by the preceding method and controlling a ratio of non-polar collector to polar collector in the coal flotation process in response to the determined degree of oxidation of coal.
Claims20
A method for determining oxidation of coal, the method comprising:
- a) mixing a coal sample with an organic solvent and an inorganic solvent, to extract oxidised coal species from the coal sample into a liquid phase, and
- b) analysing the liquid phase from step (a) to determine a degree of coal oxidation.
Dependencies are inferred from the claim text.