(1.内蒙古科技大学数理与生物工程学院内蒙古包头 014010 2.内蒙古科技大学材料与冶金学院内蒙古包头 014010 3.包头钢铁(集团)有限责任公司内蒙古包头 014010)
关键词：并罐高炉；能量耗散系数；科氏力；气体曳力
中图分类号：TF512 文献标识码：A
摘要：本研究将计算颗粒能量耗散系数的碰撞模型与水力学模型、科氏力模型、曳力模型相结合，建立了预测并罐高炉炉料堆尖位置的混合模型，并利用实测数据验证了该模型的正确性。该模型计算得出：左罐烧结矿科氏力加速度约为3.9∼4.7 m/s2，右罐焦炭为1.5∼4.8 m/s2，分别约占重力加速度的40%∼48%和15%∼49%；炉料在空区下落时，炉喉径向和切向的单位质量焦炭气体曳力分别为0.4 m/s2和0.1 m/s2，重力方向达到2.44 m/s2，是重力加速度的1/4。计算结果表明，并罐高炉堆尖位置计算必须考虑左、右料罐的差别，同时不可忽略气体曳力。
Research of Mathematical Model of Burden Distribution for Two Parallel Hoppers Bell-Less Top
SHI Lin1 ZHAO Guang-Sheng2 MAXiang3
(1.School of Mathematics, Physics and BiologicalEngineering, University of Science and Technology of Inner Mongolia, Baotou,014010, Inner Mongolia, China; 2.School of Materials and Metallurgy, Universityof Science and Technology of Inner Mongolia, Baotou, 014010, Inner Mongolia, China; 3.Baogang Group, Baotou, 014010, Inner Mongolia,China)
Key words: blastfurnace with parallel hoppers; energy dissipation coefficient; Coriolisforce; gas drag force
Abstract: Based on the combination of collision modelcalculating the particle’s energy dissipation coefficient, which was combinedwith hydraulic model, the Coriolis force model and the drag force model, amixture model was established to predict charging’s tip position for blastfurnace with parallel hoppers, and the experimental data were used to verifythe correctness of the model. By the research of the mixture model, conclusionswere drawn as follows: (1) the Coriolis acceleration of sinter in left hopperwas about 3.9~4.7 m/s2, and coke in right hopper was about 1.5~4.8 m/s2, accounting for about 40% ~ 48% and 15% ~ 48% of gravity acceleration respectively; (2) with burden falling on space area, the gas dragforce per unit mass of the coke in the radial and tangential directions offurnace throat was 0.4 m/s2 and 0.1 m/s2, respectively, while it achieved 2.44 m/s2 in the gravity direction, being 1/4 of the gravitational acceleration. Results show that the difference between the left and right hopper must be consideredduring the calculation of charging’s tip position for blast furnace withparallel hoppers, neither should the gas drag force be ignored.