C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
23/330
C01B 17/06 (2006.01)
Patent
CA 2022041
ABSTRACT For a recovery of elementary sulfur from sulfide materials which contain thermally releas- able sulfur, the sulfidic material is charged to the top portion of a fluidized bed reactor of a circulating fluid- ized bed system. Oxygen-containing gases and SO2-contain- ing, recirculated gas are fed to the bottom portion of the fluidized bed reactor and the oxygen rate is so controlled that it is sufficient to oxidize the iron content of the sulfidic materials and to meet the heat demand of the process in that a part of the sulfur which is supplied is oxidized to SO2. In the intermediate zone of the fluid- ized bed reactor, elementary sulfur is formed from sulfide sulfur and SO2 under reducing conditions. The thermally releasable sulfur is released in the top portion. A major part of the solids contained in the suspension leaving the reactor is separated and recycled to the reactor. Elementary sulfur is recovered from the ex- haust has and part of the SO2 content is discharged and the remaining part is recycled as fluidizing gas to the reactor.
Fitting Arno
Hirsch Martin
Metallgesellschaft Aktiengesellschaft
Robic
LandOfFree
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