Process for treatment of reactive fines

Details Process for treatment of reactive fines Process for treatment of reactive fines

1995-05-08

1997-03-25

Andrews, Melvyn

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75672, 423111, 501 98, 501155, C22B 402, C04B 3502

Patent

active

056139969

ABSTRACT:
A process for treatment of aluminum dross residue (NMP) having available aluminum nitride (AlN) and/or free aluminum (Al) and/or aluminum chlorides (AlCl.sub.3) having a particle size within the range of 0.3 to 300 microns, i.e., "fines" to produce a high alumina lightweight aggregate is described. The process is characterized in that the NMP is fed into a rotating sealed kiln and heated to a temperature in the range of 2000.degree. to 4000.degree. F. while feeding oxygen or a mixture of oxygen and water into the kiln with less than about 20% of the total heat energy input for heating the NMP to a temperature between 2000.degree. and 4000.degree. F. being supplied from an external source. The process does not require prior agglomerization of the fines.

REFERENCES:
patent: 5308375 (1994-05-01), Lindsay
patent: 5447548 (1995-09-01), Lindsay

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