Agglomerated alumina containing product

摘要

The invention relates to a method for producing an agglomerated product containing alumina which is useful as a component to be incorporated into a synthetic slag as used in steel making. The product is formed from powdered aluminium dross which is formed with water into pellets or briquettes and wherein the components of the pellets or briquettes are allowed to react at elevated pressure to release ammonia. The pellets or briquettes may then be calcined.

主权项

1. A process for converting powdery aluminum dross into an agglomerated alumina containing product comprising:
a) providing a powdery aluminum dross which contains aluminum values in the form of Al2O3, AlN, and Al(m); b) mixing the powdery aluminum dross with water to form a wetted aluminum dross mixture absent added binding material; c) forming the wetted aluminum dross mixture into agglomerates; d) introducing the agglomerates into a pressure vessel; e) allowing a spontaneous exothermic reaction within the agglomerates to occur in a pressure vessel at an elevated pressure and temperature with the formation of ammonia gas; f) allowing the agglomerates to be partially dried to form agglomerated pellets or briquettes; g) removing the agglomerated pellets or briquettes from the pressure vessel; and h) optionally, collecting the ammonia gas.