Process of dezincifying a material flow when operating a pig-iro

Details Process of dezincifying a material flow when operating a pig-iro Process of dezincifying a material flow when operating a pig-iro

1988-11-07

1989-11-07

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 38, 75 88, 266157, C21B 1314

Patent

active

048789437

ABSTRACT:
There is disclosed a process of dezincifying the flow of material at the operation of a plant for the production of pig iron including a direct reduction shaft furnace and a meltdown gasifier.
The crude reducing gas drawn off the meltdown gasifier is dedusted in two steps. In the first step zinc-poor coal dust is separated in a cyclone operated at a higher temperature, which is recycled into the meltdown gasifier. In the second step, upon cooling of the gas leaving the first cyclone, solid particles enriched with zinc are separated at a lower temperature. The dezincified reducing gas is fed to the direct reduction shaft furnace and the zinc-rich substances separated off the second cyclones are processed to a zinc concentrate.

REFERENCES:
patent: 4283223 (1981-08-01), Billard
patent: 4784689 (1988-11-01), Vuletic

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