| 摘要 |
The present invention is directed to an apparatus (10) and method for accurately metering and conveying a dry powder (1) or granular material to a blender (30) in a substantially closed system. The apparatus includes a storage tank (12) adapted to hold the dry powder or granular material, a hopper (24) disposed inside of the storage tank; and a conveyor (14) at leas t partially disposed inside of the storage tank, which delivers the dry powder or granular material to the hopper. The apparatus also includes a metering feeder adapted (26) to deliver the dry powder or granular material at a substantially uniform density from the hopper to a blender (30) located outside of the storage tank. The apparatus is a substantially closed system, thus minimizing the risk that the dry powder or granular material will becom e airborne. |
