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US 6,669,894 B2Granted
Roaster with stabilized fluidized bed for roasting zinc concentrate
AssigneeKorea Zinc Co., Ltd.
InventorsChang-Young Choi, Young-Gae Chun
Life of this patent
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Abstract
Disclosed is a fluidized bed roaster with stabilized fluidized bed for roasting zinc concentrate which can have a uniform internal temperature distribution to form a stabilized fluidized bed, thereby dramatically reducing the amount of sulfide sulfur contained in calcine and the amount of fine calcine particle carried over to a gas discharge port.
Claims2
A fluidized bed roaster for roasting zinc concentrate, comprising:
- an upper cylindrical section closed at an upper end thereof by a top circular roof fixedly mounted to the upper end, the upper cylindrical section having a volume corresponding to 3.8 to 4.8 times the volume of a lower cylindrical section;
- an intermediate tapered section fixedly coupled, at an upper end thereof, to a lower end of the upper cylindrical section, the intermediate tapered section having a structure downwardly tapered at a repose angle of 22 to 25° while having a volume corresponding to 1.7 to 2.2 times the volume of the lower cylindrical section;
- the lower cylindrical section fixedly coupled, at an upper end thereof, to a lower end of the intermediate tapered section;
- and
- an air supply port coupled to a lower end of the lower cylindrical section, the air supply port having tuyeres arranged in a density of 110 to 135 tuyeres per square meter (m2).
2 more elements
Dependencies are inferred from the claim text.