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Abstract

The present invention is directed to silicon carbide whisker recovery from a mixture of silicon carbide whiskers and carbonaceous silicon carbide particles. The invention involves shredding the mixture down to a specified particle size, dispersing the mixture in water to form an aqueous mixture, agitating the aqueous mixture, adding surface active reagents to the aqueous mixture, agitating the resulting water-reagent mixture, subjecting the water-reagent mixture to froth flotation having at least three stages, removing tailings therefrom containing water and silicon carbide whiskers and removing float therefrom containing reagents and carbonaceous silicon carbide particles, performing a solid-liquid separation on the tailings and the float, thereby obtaining from the aqueous solution the desired silicon carbide whiskers and obtaining from the reagent solution a carbonaceous silicon carbide particle product.

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First Claim