| 摘要 |
<p>A production method for metal cadmium powder for a nickel-cadmium battery comprising heating and melting metal cadmium in an evaporator, introducing an inert gas into the evaporator, discharging the cadmium vapor with the inert gas into a cooler, and recovering metal cadmium powder, wherein control is performed so as to satisfy at least either one of the following conditions: (1) the flow rate of the inert gas, when it is introduced into the evaporator, is at least 30 Nl/g cadmium vapor, and the introduction direction is onto the surface of the molten metal of cadmium; and (2) the temperature of molten cadmium and the flow rate of the inert gas in the evaporator satisfy the relations: log y » 8.8 x 10-3 x -5.3 (600 « x « 900), log y » 1.8 x 10-3 x -0.96 (330 « x « 600) [where x is the molten cadmium temperature (°C), and y is the inert gas velocity (cm/sec)].</p> |
