Protection of carbon electrodes
AssigneeFoseco International Limited
InventorsJosef Schiffarth, Clive Graham Lorkin, Kenneth John Fletcher
Life of this patent
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Abstract
Carbon articles, particularly carbon electrodes, are protected against corrosive attack in use by fusing material to the article, or applying material to the carbon article which under the conditions of its use is capable of fusing to the carbon article, to form a coherent coating of protective material over only that part of the carbon article liable to corrosive attack when the article is in use.
Claims13
In a process for melting metal in a carbon electrode electric arc furnace by applying electric current to the electrodes to generate an arc and thereby melting metal contained in the furnace the improvement which comprises fusing pre-formed sheet material to the sides of at least one electrode of the furnace, said material containing a graphite-wetting material which forms a coherent coating over the electrode, by virtue of said fusing and melting metal in the furnace by applying electric current to the electrodes to generate an arc.
In a process for melting metal in a carbon electrode electric arc furnace the improvement which comprises:
- a. applying to the sides of the electrodes of the furnace, preformed sheet material which material contains a graphitewetting material, which under the conditions of step (b) below is capable of fusing to the sides of the electrodes, to form a coherent coating of protective material only over that part of the sides of the electrode which is susceptible to oxidation in step (b) below and
- b. melting metal in the furnace by applying electric current to the electrodes to generate an arc and fuse any unfused pre-formed sheet material which is applied to the electrodes in accordance with step (a).
Dependencies are inferred from the claim text.