A SIMULATION STUDY ON FLUE GAS CIRCULATING SINTERING (FGCS) FOR IRON ORES

摘要

Iron ore sintering process is the main source of SO_2 generated in the steel industry, of which the discharge amount of SO_2 emission accounts for about 60% of the total. Aiming at the features of sintering flue gases and existing problems during the flue gas desulphurization, a technical route of flue gas circulation sintering (FGCS) for iron ores has been put forward. Under the simulated experimental conditions, effects of FGCS process on the main output and quality indexes and SO_2 emission rale are researched using simulating flue gases. Compared the novel FGCS with conventional sintering process, SO_2 in the final sintering flue gas is obviously enriched and the total exhaust gases can be reduced evidently. The decreasing of oxygen content in circulating gases has bad effect on the sintering indexes. Increasing the oxygen potential is beneficial to obtain high quality sinters. This investigation shows that the FGCS process is promising.