Patent ID: 7878430
Filing Date: 2011-02-01
Classification: B01F,B33Y

Abstract:
1. A method of incorporating superfine additive particles into fine powders, comprising the steps of: a) dry mixing a selected amount of dry superfine additive particles into dry fine powder particles to give a mixture having macro-scale homogeneity between the superfine additive particles and the fine powder particles; and b) breaking up agglomerates of both the superfine additive particles and the fine powder particles present by dry sifting said mixture by passing said mixture through a sifter configured to have aperture sizes in a range from about 1 to about 1000 micrometers to break up the agglomerates to ensure that all additive agglomerates are broken down to either a size of the fine particles or to very small agglomerates with a maximum size smaller than 1000 micrometers and to disperse said superfine particles onto said fine powder particles to achieve micro-scale homogeneity.