Chinese core journals in science and technology
Chemical Abstracts Service (CAS) database
EBSCO Academic Database in the United States
Japan Science and Technology Agency Database (JST)
Li Jian
This study investigates the fluidized bed roasting process for treating a cobalt-bearing copper concen-trate from overseas, focusing on investigating the key technical parameters of the ore during fluidized bed roasting. Results demonstrate that the optimal fluidized bed roasting conditions include a temperature of 630 °C, air atmosphere, gas-to-feed ratio of 2.2 mkg (operational), and material retention time of 6-7 h. Under these conditions, the roasting slag yield reaches 76.70 %, with a dust generation rate of 33.11 %. Subsequent sulfuric acid leaching of the mixed slag after continuous fluidized bed roasting achieves leaching rates of 96.58 % for copper and 89.57 % for cobalt. Flue gas analysis reveals an oxygen contentration of 2.95 %, SO2 conçentration of 60 900 mg/m3, and CO concentration of 2 130 mg/m3.Relative productivity of recovered dust via gravity, clyclone, and bag filter systems are 52.52 %, 31.62 %, and 15.86 %,respectively. The relative metal contents of copper ard cobalt in the dust account for 19.34 % and 13.53 %, respectively. These results provide solid data for the industrial-scale fluidized bed roasting design of cobalt-bearing concentrates.