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US 4,060,407 AGranted
Methods and apparatus for adding mischmetal to molten steel
AssigneeReactive Metals & Alloys Corporation
InventorJoseph R. Jackman
Life of this patent
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Abstract
A method, apparatus and alloy for adding mischmetal to molten steel by filling a metal canister with a mischmetal-magnesium alloy in the range 1% to 2.5% magnesium, plunging the metal canister beneath the surface of the steel bath being treated and holding the canister submerged in the bath until the mischmetal has dissolved.
Claims7
The method of adding mischmetal to steel comprising the steps of:
- a. forming a composite article consisting essentially of a metal canister filled with a mischmetal-magnesium alloy in which the magnesium is present in an amount sufficient to generate stirring in a molten steel bath to which it is added in the range 1% to 2.5% and the balance is mischmetal,
- b. plunging the metal canister containing mischmetal magnesium alloy beneath the surface of a molten steel bath being treated, and
- c. holding the metal canister beneath the surface of the steel bath until the canister and mischmetal-magnesium alloy is dissolved.
A rare earth addition alloy consisting essentially of about 1 to 2.5% magnesium and the balance mischmetal with ordinary impurities.
Dependencies are inferred from the claim text.