PROCESS FOR THE PRODUCTION OF CHROMIUM METAL NUGGETS FROM CHROMITE ORES/CONCENTRATES.

摘要

A process for the production of chromium nuggets from chromite ore/concentrate comprises: - oxidizing chromite ore/chromium concentrate (1 ) comprising a Cr : Fe-ratio ranging from 1.0 to 3.3 in a furnace (2) at a temperature of 900 °C, - mixing (7) the oxidized ore (4) with reductant coal (5) and fluxes (lime, silica) (6), - pelletizing (8) the mixture, - reducing the pellets in a rotary furnace (9) at a temperature between 1.400 and 1.600 °C, - separating the thus produced chromium nuggets (12) from slag (13) in a separation unit (11).