喷射精炼过程炉衬侵蚀模拟研究(Ⅱ)—复吹转炉炉底所受冲击应力分布的模型实验研究

STUDY ON THE EROSION MECHANISM OF FURNACE LINING IN THE GAS INJECTION REFINING PROCESS(Ⅱ)——Experimental study of impact stress distribution on furnace bottom in combined-blown converter process

前文叙述了复吹转炉炉衬和炉底所受剪切应力分布的模型实验研究,本文在同样条件下对采用直管式、缝隙式、环缝式及集束式(多管式)底吹喷嘴喷吹时,炉底所受冲击应力分布进行了一系列的模拟实验研究。研究结果表明,喷嘴附近所受的冲击应力最大,并在半径方向随着离开喷嘴距离的增加而急剧减少。冲击应力的有效作用半径R/d=10—13,超过此范围,炉底所受冲击应力基本不变。

In the present work the impact stress distribution acted on the furnace bottom under the same condition as the first part of work is studied experimentally with the straight tube, slit type, circular slit type and multitube nozzles. Experiments indicate that the impact stress acted on the area around the nozzle achieved the maximum and decreased sharply with the increase of distance from the nozzle in radial direction along the furnace bottom. The effective range of impact stress is up to R/d=10-13, above which the impact stress drops to a low constant. It is also shown that under the same condition of gas feed pressure, the impact stress acted on the furnace bottom increases in the following order. the circular slit nozzle, the multi-tube nozzle, the slit type nozzle, and followed by the straight tube nozzle