Method for desulfurizing molten metal
AssigneeJfe Steel Corporation
InventorHidemitsu Negishi
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Abstract
A method for smelting cast iron, including loading charge materials, melting and introduction into the melt of vanadium, titanium and magnesium oxides and high-polymer waste compounds, characterized in that, simultaneously with the introduction of oxides and waste, the exhibit cathodic polarization of the cast iron melt at a constant current load, component 0.1-10 A/dm2 calculated on the surface of the melt mirror, while As a counter electrode, a graphite electrode with an end area of up to 0.8 is used area of the melt mirror, which is under mechanical load and under electrical under tension, immerse in slag at a distance of 30-70 mm from the surface of the melt, with In this case, the ratio of cathode and anode current densities is 0.9-1.2.
Claims2
A method for desulfurizing molten metal that, using a direct-current power source, applies a potential difference between molten slag and molten metal through electrodes, of which one electrode contacting the molten metal serves as a negative electrode and the other electrode contacting only the molten slag serves as a positive electrode,
- characterized in that an applied current density Ja is determined according to an equilibrated S concentration [S]e0 before application of a potential difference such that an equilibrated S concentration [S]ea when a potential difference is applied becomes equal to or lower than a target S concentration [S]ft, wherein
- the applied current density Ja is set to 1000 A/m2 or lower.
Dependencies are inferred from the claim text.