Experimental Study On Sintering With Adding Little Biomass University Of Science And Technology Liaoning

Blast furnace coke rate reduces by 5% to 8% and productivity increases by 5% to 8% as indirect reduction of iron ore improves 10%. Sinter is the main iron-containing raw material. High-quality sinter is beneficial to blast furnace ironmaking high quality, high yield, low consumption, high efficiency and efficiency, energy saving and environment-friendly and sustainable development. Improving sinter reduction index is an important way to accelerate the reduction of block area, increase yield and reduces coke rate for blast furnace ironmaking. Biomass is a renewable clean energy and reducing agent with low sulfur and nitrogen contend and has the advantage of CO2 neutral. Biomass is more and more applied in ironmaking with high energy consumption and pollution status. Use of biomass may have the potential to improve sinter quality and reduce gas emissions.Sintering behavior with biomass is studied by sintering cup experiment combined with thermal gravimetric analysis and sintering flue gas detection on line technique, in order to improve the sinter reduction index and reduce gas emissions. It is indicated in the results that biomass has a better combustion property with lower reaction initiation temperature and higher combustion rate compared with coal. Adding a small amount of biomass in sintering process effectively improves the porosity and reduction index of the sinter and reduces emissions of harmful sintering flue gas SO2 and NOx. Also the yield, tumbler strength and utilization coefficient decrease, but when the addition amount of biomass is within a certain range, the values reduce marginally. Therefore, there should be a suitable addition amount. Under laboratory conditions, the suitable addition amount of biomass is 0.15 kg. When adding 0.15 kg biomass, sinter porosity and reduction index increase 6.20% and 3.84%; SO2 and NOx emissions reduce by 19.85% and 21.74% respectively.