SLAG COMPONENTS ANALYSIS METHOD, SLAG BASICITY ANALYSIS METHOD AND MOLTEN CAST IRON REFINING METHOD Russian patent published in 2024 - IPC G01N21/69 C21C1/00 C21C5/36 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, in particular to analysis of slag components during refining of molten cast iron. Method includes irradiating the surface of the slag to be analysed with a pulsed laser to convert part of the slag into plasma, dispersing the excitation light obtained from the slag converted to plasma, and recording the emission spectrum of the element contained in the slag; determination of the concentration of the target component or the ratio between the amounts of the target components based on the recorded emission spectrum. Pulsed laser is located on the side of the refining furnace, which is inclined for slag removal.

EFFECT: invention allows, in conditions of pre-treatment of hot metal, in which for continuous implementation of desiliconisation and dephosphorization of hot metal in combination with slagging process performed between them, one refining furnace of converter type is used, quickly and accurately determine components of slag formed during refining of molten cast iron, during intermediate process of its removal and especially when observing slag on the side of furnace during its inclination.

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