Controle de processos nas operações de espirais concentradoras com utilização de FRX portátil

Abstract

The application of spiral concentrators in iron ore processing is commonly used in the concentration stage due to the low investments and also the operating costs applied. However, adjusting its variables and settings is still a visual and manual process. In this context, it is necessary for operators to have experience with this type of equipment and decision-making is most often carried out empirically. To minimize these occurrences, a form of rapid analysis of product quality results was integrated by using a portable X-ray Fluorescence Spectrometer (XRF-P). Carrying out measurements and controls in a shorter time interval allows a faster basis for deliberating the commands for adjusting the variables in the Spiral Concentration’s steps. This assertiveness contributes to greater stability of product quality, given the variability of feed. This paper will demonstrate the results of the application of the portable FRX in the analysis of the concentrates of the spirals and the methodology for calibration of the equipment in order to become usual and show the evolution of the control of processes, increasing the stability of the step and bringing greater homogeneity of the contents of the concentrates. In addition to these benefits, the use of the methodology contributes to increasing the iron content in concentrates and mass recovery.