Patent ID: 8641799
Filing Date: 2014-02-04
Classification: C21B,C22B,Y02P

Abstract:
1. A process for producing agglomerates from materials, comprised of fine-grained iron carriers, including materials selected from the group consisting of iron ores, iron ore concentrates, iron-containing dusts, and iron ore containing slurries, additions, and at least one binder, the agglomerates being used as a charge material for a thermal metallurgical process, the process comprising in an agglomeration step, mixing the iron carriers with a first binder and the additions and forming agglomerates with an interior; in at least one further agglomeration step, coating the agglomerates with an outer layer comprising iron carriers and at least one second binder, and heating the agglomerates so that only the at least one second binder in the outer layer of the agglomerates cures, wherein the at least one second binder has a lower curing temperature than the first binder in the interior of the agglomerates.