C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
23/282, 39/46, 2
C04B 2/00 (2006.01) B01J 6/00 (2006.01) B01J 8/00 (2006.01) B01J 8/32 (2006.01) C04B 2/10 (2006.01)
Patent
CA 1220323
A B S T R A C T In a process for calcining diamide lime in a fluidized bed using a heat medium in a calcination furnace, the improvement wherein the heat medium has a particle diameter of 0.1 to 2.5 mm, the amount of the diamide lime fed into the calcination furnace is 0.1 to 5 times the weight of the heat medium per hour, the burnt gas is allowed to flow at a space velocity of 0.8 to 3.0 meters/sec., and the resultant lime powder is recovered by a carry-over method; an apparatus for calcining diamide lime in a fluidized bed using a heat medium, which comprises a furnace, at least two pneumatic injecting means opened toward the center of the furnace for injecting the starting diamide lime together with a carrier gas into the furnace, and means for drying the starting diamide lime; and a desulfur- izing agent for molten iron, which comprises quick lime powder obtained by calcining diamide lime in an oxidizing atmosphere.
399484
Ishizaka Hiroyuki
Muratsubaki Yoshihara
Takahashi Atsushi
Nippon Carbide Kogyo Kabushiki Kaisha
Smart & Biggar
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