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US 4,705,561 AGranted
Magnesium calcium oxide composite
AssigneeThe Dow Chemical Company
InventorWilliam G. Green
Life of this patent
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Abstract
A product and method of manufacture are set forth. The product is used in desulfurizing steel. Magnesium is in its molten state, and with vigorous stirring, lime is added. A relatively brittle material is obtained upon cooling which can be ground to a particulate form and used in steel desulfurization. The composite is both a mixture of magnesium and lime and also includes Mg.sub.2 Ca alloy.
Claims13
A method of manufacture of an injectable for molten ferrous metal comprising the steps of:
- (a) obtaining a specified weight of magnesium in a molten state;
- (b) adding calcium oxide to the magnesium accompanied with mixing and continuing until sufficent calcium oxide has been added that a specified ratio between magnesium and calcium oxide has been achieved and mixing in the molten magnesium has occurred;
- (c) cooling the mixture to solidify the mixture;
- and
- (d) crushing the cooled mixture to particulate form for subsequent injection into molten metal.
2 more elements
A method of preparing a magnesium heated material comprising the steps of:
- (a) melting in a container a predominantly magnesium alloy;
- (b) distributing particulate calcium oxide through the melted magnesium sufficiently until particulate calcium oxide is dispersed through the melted magnesium;
- and
- (c) casting the melted material to a specfied shape by cooling.
1 more element
Dependencies are inferred from the claim text.