1 School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China 2 Key Laboratory for Ecological Metallurgy of Multi-Metallic Mineral (Ministry of Education), Northeastern University, Shenyang 110819, Liaoning, China 3 Technology Center, Shanghai Meishan Iron and Steel Co., Ltd., Nanjing 210039, Jiangsu, China 4 Central Research Institute, Baosteel Co., Ltd., Shanghai 201900, China
Simulation of gas–solid flow in sinter vertical cooling furnace
1 School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China 2 Key Laboratory for Ecological Metallurgy of Multi-Metallic Mineral (Ministry of Education), Northeastern University, Shenyang 110819, Liaoning, China 3 Technology Center, Shanghai Meishan Iron and Steel Co., Ltd., Nanjing 210039, Jiangsu, China 4 Central Research Institute, Baosteel Co., Ltd., Shanghai 201900, China
摘要 The velocity distribution of sinter and gas in vertical cooling furnace (VCF) has an important influence on gas–solid heat transfer. Based on the slot model of single hopper in the VCF of Meishan Iron and Steel Co., Ltd., the velocity and particle size distribution of sinter and the velocity and pressure distribution of gas were studied using a computational fluid dynamics–discrete element method model to obtain the gas–solid flow rule in the VCF. The results showed that the velocity of sinter near the wall and the edge of vent cowl was lower than that in the rest of the same plane. Therefore, the rectangular section of the vertical cooling furnace can be divided into a quasi-static zone, a plug flow zone and a convergent flow zone according to the flow velocity of the sinter. The average particle size and the void fraction of sinter bed were distributed in ‘‘W’’ and ‘‘V’’ shape along the width direction, respectively. The distribution of gas velocity in the furnace cavity was uneven, and the high-velocity area gradually changed from the center to the edge of the furnace cavity with the rise of gas. Reducing the ratio of edge to center gas flow from 2.7:1 to 0.7:1 could improve the gas velocity, but could not change the gas velocity distribution. The gas velocity distribution was more affected by the average particle size distribution of the sinter bed. It was suggested that measures need be taken to adjust it to improve the gas velocity distribution in the VCF.
Abstract：The velocity distribution of sinter and gas in vertical cooling furnace (VCF) has an important influence on gas–solid heat transfer. Based on the slot model of single hopper in the VCF of Meishan Iron and Steel Co., Ltd., the velocity and particle size distribution of sinter and the velocity and pressure distribution of gas were studied using a computational fluid dynamics–discrete element method model to obtain the gas–solid flow rule in the VCF. The results showed that the velocity of sinter near the wall and the edge of vent cowl was lower than that in the rest of the same plane. Therefore, the rectangular section of the vertical cooling furnace can be divided into a quasi-static zone, a plug flow zone and a convergent flow zone according to the flow velocity of the sinter. The average particle size and the void fraction of sinter bed were distributed in ‘‘W’’ and ‘‘V’’ shape along the width direction, respectively. The distribution of gas velocity in the furnace cavity was uneven, and the high-velocity area gradually changed from the center to the edge of the furnace cavity with the rise of gas. Reducing the ratio of edge to center gas flow from 2.7:1 to 0.7:1 could improve the gas velocity, but could not change the gas velocity distribution. The gas velocity distribution was more affected by the average particle size distribution of the sinter bed. It was suggested that measures need be taken to adjust it to improve the gas velocity distribution in the VCF.
Teng-fei Qi,Hai-feng Li,Jun-jie Sun, et al. Simulation of gas–solid flow in sinter vertical cooling furnace[J]. Journal of Iron and Steel Research International, 2023, 30(11): 2133-2142.
2023, Vol. 30 
