SALIS

Description

The analysis of the slag accumulating during the production of steel plays an important role in process control. For this reason, the availability of a precise, timesaving multi-element analysis is of vital importance. Currently, a time-intensive preparation of the samples is necessary, in order to be able to analyse the slag samples using X-ray fluorescence spectroscopy. SALIS is based on laser emission spectrometry, in particular LIBS – Laser-Induced Breakdown Spectroscopy. In this procedure, a pulsed laser beam is focused on the sample, a small amount of the material is ablated and plasma is generated. The plasma radiation is detected time-resolved with a Paschen-Runge arranged spectrometer. A preparation of the sample can thus be dispensed with. SALIS is designed for the quantitative analysis of the following materials: CaO, SiO₂, Fe_tot, Mn, MgO, Al₂O₃, TiO₂, P₂O₅ and S. Due to new developments in the areas of mechanics, electronics, laser pulse modulation and multi-element calibration technology, the analysis results conform to metallurgical standards. As an average value, a relatively standard deviation of 2.5% is achieved for all detected elements. By reducing the duration of the analysis by a factor of 2, the results of the analysis for process control are available faster.