Determination of Fluorine in Basic Slag

Abstract

Determination of Fluorine in Basic Slag. (Study on the chemical analysis of basic slag-V) Shigeo Wakamatsu Synopsis: This investigation was undertaken to find rapid and accurate chemical methods for the analysis of basic slag. In the report (V), a simple combustion procedure and an indirect volumetric method were described for the determination of fluorine in basic slag.

Chemical analysis of argon-oxygen decarburization slags in stainless steelmaking process by X-ray fluorescence spectrometry

“…Although several different methods of analyzing fluorine in oxide mixtures have been reported to date as earlier mentioned,9, 10 neither can be considered suitable for a wide range of fluorine concentrations, as was demonstrated in previous work 12. Owing to the unavailability of the reliable standard reference materials for fluorine, an alternative attempt has been made to prepare a synthetic powder by mixing highly pure chemicals so that their calculated compositions were similar to those of AOD slags.…”

“…However, it is difficult to interpret the real processes utilizing fluorine‐containing fluxes because the standard analysis methods of fluorine contained in AOD slags are not available. Although several wet chemical analysis methods of fluorine in the slags were proposed, none of them could provide the reliable results 9, 10…”

Quantitative Chemical Analysis of Fluorine in the Slags Produced in Stainless Argon–Oxygen Decarburization Process by X-ray Fluorescence Spectrometry

“…Therefore, the compositions in Table 6 were converted to those of fluorine (F) and total calcium oxide (Ca t O) using Eqs. (1) to (5) in the reverse order to that in Table 4.…”

“…5,6) In the present study, accuracy and precision tests for two methods were carried out using two reference materials containing fluorine (S8 Slag and S9 ESR Slag) as shown in Table 3. From the results in Table 3, the analyzed fluorine content by the F ion electrode method is closer to that of S8 Slag than the value obtained by the KMnO 4 titration technique using acetic acid.…”

“…Although several wet chemical analysis methods of fluorine in slags were proposed, they could not provide the reproducible results. 5,6) Over a number of years, X-ray fluorescence spectrometry (XRF) has been widely used as a routine and rapid instrumental analysis technique for quantifying minerals, slags, oxides, etc. A variety of applications has emerged for this established XRF technique.…”