Thermal analysis (DSC-TG-MS) - phosphate ore samples

Samples of phosphate ores from various deposits were subjected to differential scanning calorimetry and thermogravimetry coupled with mass spectrometry (DSC-TG-MS).
All samples used in this study prior to any experiments were air dried under ambient conditions, then ground in IKA A11 Basic analytical mill and sieved to fraction less than 300 μm.
The thermal analyzer Netzsch STA 449 F3 Jupiter, with thermobalance and the quadrupole mass spectrometer Netzsch Aeolos QMS 403C, was used. Sample containing 20 mg of studied material was placed in a 85 μl DSC crucible made of alumina, and then heated to a temperature of 1100°C with a heating rate of 10°C/min in synthetic air with a total flow of 30 ml/min. Measurements were preceded by correction measurement up to 1200°C to compensate thermal effects associated with characteristics of the crucible.

This research was funded by National Science Centre, Poland under research project „Badania oczyszczania surowców fosforowych z kadmu przez kalcynację”, no UMO-2021/41/N/ST8/00147.