Injectable reagents for molten metals
AssigneeThe Dow Chemical Company
InventorsEdward J. Skach, Jr., David W. Brake, Joseph H. Waibel
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Abstract
Injectable reagents useful for innoculating molten process metals, such as molten iron, are prepared by effecting an impregnation of a minor amount of a molten metal reagent, such as Mg or Al or alloys of these, into small particles of a major amount of an inorganic reagent, such as alkaline earth metal oxides and/or carbides, and freezing the molten metal reagent, thereby obtaining particles of the inorganic reagent permeated with metal reagent.
Claims13
A method of preparing an injectable reagent for processing molten metal, said method comprising
- impregnating a metal, in molten form, into non-molten non-metallic inorganic particles in an atmosphere substantially devoid of extraneous reactants, the weight of said molten metal being less than the weight of the said non-molten, non-metallic inorganic particles,
- cooling the so-impreregnated particles to freeze the metal reagent, and
- effecting a recovery of inorganic reagent having metal reagent impregnated therein, said metal reagent comprising less than 50% by weight of the so-formed particles.
A method for preparing an injectable reagent for a molten process metal, said molten process metal having a melting point greater than about 950.degree. C., said method comprising
- mixing together a quantity of metal selected from the group consisting of aluminum and magnesium with a greater quantity of at least one particulate non-molten inorganic reagent compound of at least one metal of the group consisting of Ca, Mg, and Al,
- said mixing being done in an environment which is substantially devoid of extraneous reactants, for a time sufficient to obtain a substantially uniform distribution of the molten metal reagent in the said quantity of inorganic reagent compound, thereby effecting permeation of the molten reagent metal into the particles of inorganic reagent compound,
- cooling the mixture to below the freezing point of the molten reagent metal, and
- effecting a recovery of particulate inorganic reagent compound permeated with said reagent metal.
Dependencies are inferred from the claim text.