| 摘要 |
The powdered material contains oxygen in the oxide and/or adsorbed form and the oxygen present is reduced in a first pre-sintering stage and the cohesion of the material is ensured in a second sintering stage. The pre-sintering stage is carried out under a reducing atmosphere based on hydrogen and neutral gas whose flow rate FG is higher than or equal to: <IMAGE> in which relation: SP=section of the layer of powder to be sintered in sq.m DP=voluminal mass of the powder in kg/cu m X(O2)i=percentage of oxygen mass in the powder before the pre-sintering stage, in the oxide and/or adsorbed form, P(H2)i=voluminal percentage of hydrogen in the gas introduced into the furnace, P(H2)f=the smallest voluminal percentage of hydrogen in the atmosphere in the furnace at a point where the oxides have been completely reduced, vS=speed of feed of the material in the furnace expressed in m/hr, alpha is a constant FG being expressed in cu.m/hr. |
