A METHOD OF ESTIMATION OF NA2O AND K2O CONTENT IN ORES, FLUXES, SLAGS AND COAL ASH BY INDUCTIVELY COUPLED PLASMA ATOMIC EMISSION SPECTROSCOPY

摘要

The present invention relates to a method of estimation of Na2O and K2O in ores, fluxes, coal and coke ash by inductively coupled plasma - atomic emission spectroscopy (ICP-AES) comprising the steps of optimizing torch height, plasma power and nebuliser flow of the spectrometer on aspirating standard solutions of Na and K into argon plasma for particular intensity lines of Na and K, count rate and wave length scans of Na and K respectively; preparing a number of calibration solutions of manganese ores containing Na2O and K2O along with a standard blank solution, calibrating and standardizing the said standard solutions on powering the spectrometer, drawing calibration curves for both the constituents Na2O and K2O through mathematical regression and comparing the values obtained from the regression curves with actual ones; preparing solutions of unknown temples of ores, fluxes, coal and coke ash as produced and used in integrated steel plants, aspirating the solutions into plasma, comparing the values obtained for Na2O and K2O along with the certified values of Na2O and K2O and correcting the result for the respective dilution done; ensuring the performance of the method for accurate determination of Na and K contents by evaluating standard deviations for standard samples.