Mannesmann Aktiengesellschaft

Nederlandsche Wapen-en Munitiefabriek De Kruithoorn N.v.

Josef Hewing

Norbert Dautzenberg

Klaus Grebe

Hans De Haas

Max Michalke

Henri Weber

Iron oxide particles are made by spray calcination and the oxide is reduced at least substantially in CO at temperatures between 800.degree. and 1000.degree. C. The oxide is heat-treated prior to calcination or CaO is added to enhance formation of iron fibers. The reducing atmosphere may in parts include hydrogen or the last phase of reduction is carried out in hydrogen. The iron cake is cooled and broken up in a grinder. The resulting powder has low bulk density due to a fiber-like, non-porous consistency of its particles. Grinding may continue to increase bulk density.

Method of making iron powder

An iron powder is compressed into a disintegrating bullet used for practice ammunition. The powder having a predetermined particle dimension is obtained by atomizing a molten mass of steel with pressurized water. The powder is annealed subsequently, then crushed, scrubbed and sieved to obtain particles at a size preferably between 0.4 to 1 mm.

Method of making dummy bullets

Growing community of inventors

Monchen-Gladbach, Germany

Josef Hewing