A cold model of top–bottom blown converter was set up to study the particle transport phenomenon and vibration performance of converter with bottom powder injection. The effect of bottom blowing flow rates, tuyere diameters, arrangements, and powder to gas mass ratios on powder distribution and furnace body vibration was investigated. The results show that the bottom injection parameters and modes have significant effects on the particle transport behavior and furnace vibration. The powder dispersion uniformity and furnace vibration increase with the increase in bottom blowing tuyere diameters. In the lower range of bottom blowing flow rates and powder to gas mass ratios, the powder dispersion uniformity is improved with the increase in them. However, in the higher range, the excessive furnace vibration leads to reduction in uniformity in powder dispersion. When the bottom blowing tuyeres arrange at double arrangement of 0.5R (R refers to the radius of the bottom) distance between tuyere and center of bath bottom, the converter has optimal particle transport behavior and vibration performance. The vibration law of converter with bottom powder injection was revealed by deducing the empirical formulas of furnace vibration maximum amplitude. The vibration intensity is affected by Froude number, powder to gas mass ratio, and tuyere arrangement.

建立顶底吹转炉冷模型，研究底喷转炉的颗粒输运现象和振动性能。研究了底吹流量、风口直径、布置和粉末与气体质量比对粉末分布和炉体振动的影响。结果表明，底部注入参数和模式对颗粒传输行为和炉子振动有显着影响。随着底吹风口直径的增加，粉末分散均匀性和炉膛振动增加。在底吹流量和粉气质量比的较低范围内，粉末分散均匀性随着它们的增加而提高。然而，在更高的范围内，过度的炉子振动导致粉末分散的均匀性降低。底吹风口排列成0.5倍排列时R ( R指底部半径) 风口到槽底中心的距离，转炉具有最佳的颗粒传输行为和振动性能。通过推导炉膛振动最大振幅的经验公式，揭示了底部喷粉转炉的振动规律。振动强度受弗劳德数、粉气质量比和风口布置的影响。