Societe Nationale Des Poudres Et Explosifs

Bernard W Wiedemann

Louis J Leneveu

Didier J Treneules

Remy Favrot

Jean-Pierre L Cartier

Yves Bertrand

Jean-Charles Perennou

Jean-Marc Peyrard

Pierre Gaudilliere

The present invention relates to a process for the manufacture of fine propellant powders by granulation, and, by way of products, to the fine powders thus obtained. The process according to the invention consists in granulating the base materials, wetted with solvent, in a granulating tray 11, in subsequently subjecting the granules thus obtained to a first partial drying in a drier 14, and in completing the finishing of the said granules in a rounder 16, optionally in the presence of solvent. The process according to the invention can be carried out continuously or batchwise, with a very high degree of operational safety. The propellant powders thus obtained possess a good activity and are suitable for small-caliber and medium-caliber weapons.

Process for the manufacture of fine propellant powders by granulation,

The present invention relates to continuous triturators and malaxators having a horizontal drive shaft. The apparatus preferably comprises a semi-circular chute surmounted by parallelepipedal vertical walls, and a stirrer consisting of a shaft which is concentric with the chute and carries rigid blades perpendicular to this shaft, at least one in four of the said blades being extended by a tongue which rubs against the chute, and the materials constituting the various elements which can come into contact with the grains of propellant powder being conductors of electricity. Apparatus which makes it possible to carry out continuous surface treatments of granular propellant powders.

Apparatus and process for continuous surface treatments of propellant

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Pont de Buis, France

Bernard W Wiedemann