| 摘要 |
Closed device, with potential fluidization, for conveying powdery materials from a storage area (31) to at least one supply area (45), which comprises between those two areas at least one horizontal or inclined conveyor (33) provided with fluidization means consisting of a lower gas circulation channel (35), an upper channel (36) for the circulation of the powdery material and of the gas, between which a porous wall (44) and at least one gas supply manifold (38) of the lower channel are arranged, enabling to establish a pressure (Pf), characterized in that, in order to potentially fluidize the powder material filling the conveyor (33), the latter is provided with at least one balancing column (39) of which the filling height balances the pressure Pf of the potential fluidization gas. Said closed device is particularly appropriate to the transport of alumina from a storage area to a consuming area. |
