Method for preparing ultra fine nickel powder

Details Method for preparing ultra fine nickel powder Method for preparing ultra fine nickel powder

B - Operations, Transporting

22

F

B22F 9/28 (2006.01)

Patent

CA 2336863

In a process for production of ultrafine nickel powder, raw material gas having a partial pressure of nickel chloride vapor within a range from 0.2 to 0.7 is fed into a reducing furnace and the nickel chloride vapor is reduced with hydrogen while flowing the raw material gas in this reducing furnace at a space velocity (SV) within a range from 0.02 to 0.07 sec-1.

La présente invention concerne un procédé de préparation de poudre de nickel ultra-fine consistant à réduire en phase vapeur du chlorure de nickel gazeux. Ce procédé est caractérisé en ce que une matière gazeuse présentant une pression partielle de chlorure de nickel gazeux comprise entre 0,2 et 0,7 est introduite dans un four de réduction, la réduction s'effectuant dans le four en présence d'hydrogène, à une vitesse spatiale (SV) de chlorure de nickel gazeux comprise entre 0,02 et 0,07 sec<-1>.

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