Grain gravity, buoyancy and gas drag were taken into consideration in burden trajectory calculation and the movement trajectory of a particle in chute and freeboard was computed.

• 摘要针对目前高炉料流轨迹计算的不足，本模型考虑了颗粒在空区下落过程中受重力、浮力及煤气曳力的作用，计算了炉料颗粒在溜槽和空区下落等阶段的运动轨迹。