Method and apparatus for making highly oxidized lead powder

Details Method and apparatus for making highly oxidized lead powder Method and apparatus for making highly oxidized lead powder

B - Operations, Transporting

22

F

148/16, 23/265,

B22F 1/00 (2006.01) C01G 21/10 (2006.01) C22C 1/05 (2006.01) H01M 4/57 (2006.01)

Patent

CA 2005207

A method for producing highly oxidized lead powder containing red lead in a desired content is efficiently performed in a rotary kiln furnace having a high temperature zone and a low temperature zone, wherein a maturing oxidation of a raw lead powder containing metallic lead and litharge is performed with spontaneous rise in temperature, while spraying water on said material to control said spontaneous rise in temperature in the low temperature zone of said furnace and then heating the resultant product of the maturing oxidation to a temperature above the temperature of the maturing oxidation, in the high temperature zone of said furnace, to produce the desired content of red lead.

Méthode de fabrication d'une poudre de plomb très oxydée renfermant du minium selon une proportion voulue. Cette méthode est utilisée avec efficacité dans un four rotatif possédant une zone à température élevée et une zone à basse température, dans lequel l'oxydation de maturation de la poudre de plomb brut qui contient du plomb métallique et de la litharge est réalisée avec une hausse spontanée de la température dans la zone à basse température du four et en chauffant ensuite le produit de l'oxydation de maturation à une température au-dessus de celle de la température d'oxydation de maturation, dans la zone à température élevée du four, afin d'obtenir la proportion de minium voulue.

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