Use of novel rotary tubular kiln

Details Use of novel rotary tubular kiln Use of novel rotary tubular kiln

1984-08-03

1986-12-16

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

252 6256, 423634, C21B 1308

Patent

active

046295003

ABSTRACT:
In a rotary tubular kiln for carrying out gas-solids reactions, comprising an indirectly heated, rotatable reaction tube with inner baffles which is provided with charging and removing devices for solid and gas inlet and outlet lines, the improvement which comprises forming the baffles as a central tube which is sealed on both sides and runs along the total length of the kiln, and a spiral which is tightly connected to the central tube and also to the outer rotatable tube. Lifting blades are uniformly distributed along the inner periphery of the rotatable tube. The kiln is suitable for carrying out oxidation, reduction, chlorination, roasting, decomposition, catalytic, annealing and/or cooling processes, e.g. the conversion of hematite to magnetite or goethite to iron.

REFERENCES:
patent: 2600871 (1952-06-01), Helwig
patent: 2839381 (1958-06-01), Lee
patent: 2900236 (1959-08-01), Speed et al.
patent: 2988442 (1961-06-01), Tanner
patent: 3320049 (1967-05-01), Hendrickson

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