DEVICE FOR THE IMPROVEMENT OF CRUDE PELLETS AND PELLETIZING PROCESS

摘要

A pelletizing process, having two distinct serial stages. In the first stage, crude (or green) pellets of a given ore, or a mixture of ores (such as iron ore, manganese ore and other minerals), are produced, while in the second stage, a Device for Improvement of Crude Pellets, is used. The Device includes a slightly elastic and smooth surface, with reduced attrition rate, that may be striated, and that, encircled in itself, forms a cylindrical geometric hollow figure supported by a metallic structure, also cylindrical, with the set forming a finishing drum. The Device rotates with an inner and continuous charge of ore pellets, and can rearrange the structure of such pellets, improving their physical quality: compressive strength, sphericity and surface finishing, and assimilate fines generated during previous processes. This device allows application of diverse materials to the pellets to add required extra properties per specificities of subsequent industrial processes.

主权项

1. Device for the improvement of crude pellets (1), wherein it comprises a rotary drum (2); the rotary drum (2) is configured to work at room temperature and its innermost surface (3) is, at least, partially coated with a simultaneously adherent and elastic material; the rotary drum (2) comprises an internal cleaning system (4), which is configured to clean the innermost surface (3) of the rotary drum (2) during the operation of the device for the improvement of crude pellets.