39 / 2021-11-28 23:13:46

Simulation of fuel granulation behaviours and analysis of fuel distribution characteristics in iron ore sintering

Iron ore sintering, granulation, fuel distribution, particle size, process simulation

（4）能源科学与技术 > 3. 化石能源清洁高效燃烧技术

The efficient utilization of fossil fuels is one of important ways to achieve "carbon peak" in iron and steel industry. It is essential to implement the refined utilization of fuel to energy saving and carbon reduction during the iron ore sintering. Therefore, it is prior to find out the partition laws of fuel in granules with various sizes and sinter layer for high-efficiency fuel combustion. Based on the improved Litster’s granulation model, this paper aims to simulate the aggregation behaviours of fuel with different sizes during the granulation and study the influence laws on fuel distribution of different sizes granules with fuel ratio and fuel particle size distribution of raw materials. The simulation test results show that fuel distribution of different sizes granules is affected by the fuel distribution of raw material, which indicates that the fuel content of coarse and fine granules is lower than 15%, while that of 3-5mm size is higher than 35%. With the decrease of fuel ratio in ore blends, the fuel distribution of granules with different sizes presents that the fuel content of coarse granules increases, the ones of 6.3-8mm from 8.6% to 13.0%, and the fuel content of fine granules decreases, the ones of 2-3mm from 15.4% to 13.7%. As the fuel content with -0.5mm particles increases, the fuel content of 5-6.3mm granules reduces, from 15.4% to 7.7%, and the one of 3-5mm granules increases, from 34.8% to 38.0%. Then the accuracy of this result is further verified by experiments. The fuel distribution simulation model can lay a theoretical foundation for the development of new technology, such as the control of fuel particle sizes in ore blends.