Process for desulfurizing molten metals
AssigneeInstitut de Recherches de la Siderurgie Francaise
InventorsChristian Gatellier, Michel Olette
Life of this patent
Estimating the term…
Abstract
Process for decreasing the sulfur content of liquid metal using high temperature comprising passing a direct current by means of two electrodes through a solid electrolyte constituting a refractory wall of oxide having anionic conductivity through the oxygen (O.sup.-.sup.-) ions and also cationic conductivity through ions which are capable of reacting with the sulfur, wherein the metal to be purified forms the negative electrode. The process is particularly adapted to desulfurizing iron and ferrous alloys when present in the liquid state.
Claims9
A process for decreasing the sulfur content of a metal that is liquid at a high temperature which comprises passing a direct electric current between two electrodes, one of which consists of a solid refractory metal oxide having an anionic conductivity through oxygen (O.sup.-.sup.-) ions that are present therein and cationic activity through the presence of cations that are present therein which are capable of reacting with sulfur, the said electrode of the refractory metal oxide containing a fluoride of an alkali metal or alkaline-earth metal, in which process the metal to be desulfurized forms the negative electrode of the electrochemical cell that is thus produced.
Dependencies are inferred from the claim text.