Production of valve metal powders

Details Production of valve metal powders Production of valve metal powders

B - Operations, Transporting

22

F

B22F 9/24 (2006.01) B22F 9/28 (2006.01) C22B 34/24 (2006.01)

Patent

CA 2589109

The invention relates to the production of valve metal powders, in particular, tantalum powders by reduction of a corresponding valve metal compound, for example, K2TaF7, with an alkali metal in the presence of a diluent salt, whereby the reduction is carried out in the presence of a particle diminution agent, preferably, Na2SO4, which is added to the reaction mixture continuously or in aliquots.

L'invention concerne la production de poudres métalliques pour soupapes, en particulier de poudres de tantale, par réduction d'un composé métallique de soupape correspondant, par exemple K2TaF7, avec un métal alcalin en présence d'un sel de dilution, cette réduction ayant lieu en présence d'un agent d'affinage de grains, de préférence Na2SO4, ajouté par portions ou en continu au mélange réactionnel.

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