Aplicação do método termogravimétrico na verificação de curvas de calibração em minério de ferro

Abstract

ABSTRACT The thermoanalytical technique that follows the loss and / or mass gain of the sample as a function of time is called Thermogravimetric Analysis (TGA). The development of this work arises from the necessity and opportunity of study to verify the influence of calibration curves using the thermal analysis, with regard to the loss of volatiles by calcination, better known has fire loss. In this way, to analyze the graphical behavior and the quality of the samples to different implanted curves, in order to mitigate trends and improve the quality of the results. The values obtained for p-value were much lower than the reference value (5%) and R² well close to 1, proving to be satisfactory, which means that there were no significant oscillations in both the repeatability and the reproducibility of the samples. Therefore, the calibration curves can be used adequately for the quantification of PPC (%) and contaminants in samples of iron ore and without the need of adjustments.