| 摘要 |
PCT No. PCT/GB91/01189 Sec. 371 Date Jan. 12, 1993 Sec. 102(e) Date Jan. 12, 1993 PCT Filed Jul. 17, 1991 PCT Pub. No. WO92/01525 PCT Pub. Date Feb. 6, 1992.An introducing means for introducing particulate material into a molten metal, molten alloy or molten ceramic stream, or spray of droplets formed therefrom is disclosed. The introducing means has an annular introducing chamber defining an opening through which the stream may be teemed. The chamber includes an inlet, and an outlet positioned about the opening. The outlet allows particulate material to exit from the introducing chamber at a plurality of positions about the opening so that, in use, the particulate material is introduced substantially uniformly about the stream or spray. The particulate material is preferably supplied by means of a hopper, a screw feeder for feeding material to the hopper to a mixing chamber, and a transport gas for transporting the particulate material from the mixing chamber to the introducing chamber. |
