PURPOSE: To make possible the treatment meeting the component fluctuations of raw material powder by disposing continuously, side by side, a preheating chamber, reduction annealing chamber and cooling chamber, providing respectively movable doors to the boundaries between the chambers and providing respectively evacuating devices for pressure reduction to the chambers.
CONSTITUTION: A reduction annealing chamber is formed by delineating, side by side, and disposing continuously the preheating chamber 1 where carbon- contg. raw material powder is preheated and dried, the reduction annealing chamber 2 where said powder is deoxidized and annealed and the cooling chamber 3 where the powder is cooled. The movable doors 5, 6 are provided to the boundaries of the chambers 1, 2, 3 to form the independently delineated spaces. Vacuum pumps 15, 15', 15" are respectively separatedly provided to the chambers. The independent temp. and pressure reduction control of the chambers 1, 2, 3 and the treatment meeting the component fluctuations of the raw material powder are thus made possible and the productivity of the powder is improved.
| JP6905947 | Heat treatment furnace |
| JP4451259 | Heat treatment equipment |
OKAWA KOTARO
YAMAMOTO HIROYUKI
OGURA KUNIO
