Method and device for spectral analysis of a chemical composition of molten metals

Abstract

The invention relates to the field of spectral analysis of the chemical composition of ferrous and non-ferrous metals and can be used in metallurgical factories to monitor the ongoing production of molten (liquid) electrically conductive materials directly in the melting units. A method for optical emission spectral analysis of the chemical composition of an electrically conductive metal melt includes the following steps: immersion of a refractory probe with a sampler into a container with a metal melt at an angle to its surface, ingress of the metal melt into the sampler due to the ferrostatic pressure and stabilization of its level due to an inert gas flow, excitation of plasma torch using electric spark from an electrode located inside the sampler, transfer of the plasma glow through the optical channel to the input of the spectrometer, receiving a spectrum of the chemical elements in the metal, processing this spectrum in the computer to evaluate composition and the mass fraction of the chemical elements in the melt, wherein when measuring the level of the liquid sample in the sampler is stabilized and maintained at the level of the lateral opening in the wall of the sampler due to the flow of inert gas, which is continuously fed into the probe and comes out as bubbles through the hole directly into the melt medium. The technical effect: increase in sensitivity and accuracy of spectral analysis of electrically conductive melts, increase in reliability and simplification of the device for plasma excitation.

Dependencies are inferred from the claim text.