Addition of magnesium to molten metal
AssigneeMagnesium Elektron Limited
InventorsGordon A. Clegg, Geoffrey Maurice Cull, Phillip Andrew Fisher, William Unsworth
Life of this patent
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Abstract
An additive for a ferrous melt to remove sulphur comprises agglomerates of a mixture of from 15 to 50% by weight of magnesium, 1 to 10% by weight of calcium fluoride and a refractory material to form a metal-permeable matrix when subjected to the temperature of a ferrous melt. The agglomerates may contain a binder and be formed into briquettes. The additive may be introduced into the melt by plunging.
Claims21
An additive for a ferrous melt comprising an agglomerated, substantially homogeneous mixture of from 15 to 50% by weight of magnesium particles and from 1 to 10% by weight of calcium fluoride, the balance comprising particles of a refractory material which is inert to magnesium at the melting point of the latter, the refractory material providing a coherent metal-permeable matrix when subjected to the temperature of the ferrous melt.
A method of making an additive for a ferrous melt which comprises
- mixing from 15 to 50% by weight of magnesium particles and from 1 to 10% by weight of calcium fluoride, the balance comprising particles of a refractory material which is inert to magnesium at the melting point of the latter, and
- forming said mixture into substantially homogeneous agglomerates, the refractory material providing a coherent metal-permeable matrix when subjected to the temperature of the ferrous melt.
Dependencies are inferred from the claim text.