Some Features of Iron Determination in Dust Emissions from Gas Purification at the Electrometallurgical Plant

We have studied specific features of iron determination in dust emissions from gas purification in the electrometallurgical plant by energy dispersive X-ray fluorescence (EDXRF) analysis and inductively coupled plasma atomic emission spectrometry (ICP-AES). Sample preparation conditions have been optimized with allowance for the analytical techniques used. The phase composition of the gas purification dust emissions has been determined by X-ray diffraction: the major phases are zincite, zinc ferrites, halite, and sylvite. Taking into account the X-ray diffraction results, we prepared model mixtures which were then used to construct calibration curves. A technique has been developed for rapid iron determination in gas purification dust emissions by EDXRF. The technique was tested in analysis of real dust emission samples, which were analyzed by ICP-AES as well. We obtained satisfactory agreement between the results of iron determination by EDXRF (Δ = 1.3%) and ICP-AES (Δ = 2.6%).