喷射精炼过程炉衬侵蚀模拟研究(Ⅲ)——炉衬所受冲击应力和剪切应力分布的模型实验研究  

MODEL STUDY ON THE EROSION MECHANISM OF FURNACE LINING IN THE GAS INJECTION REFINING PROCESS(Ⅲ)——Model Study of Impact Stress and Shear Distribution on the Furnace Lining

作　　者：蔡志鹏[1] 刘晓亚[1] 魏伟胜[1] 肖忠敏[2] 刘东夫[2] 

机构地区：[1]中国科学院化工冶金研究所,北京100080 [2]武汉钢铁公司技术部

出　　处：《化工冶金》1991年第3期189-192,共4页

摘　　要：前文报导了复吹转炉炉底所受冲击应力的模拟实验研究,本文在同样条件下对采用缝隙式、环缝式及集束式(多管式)底吹喷嘴喷吹时,炉衬所受冲击应力和剪切应力分布进行了一系列模拟实验研究.研究结果表明,由于熔池流动和搅拌加强,致使炉衬所受冲击应力随着距炉底距离的增加而逐渐增大,到达渣线下部位置时呈现最大值.当采用6个喷嘴时(两个布置在炉底半径0.3R 处,四个布置在0.6R处),在靠近四个布置在0.6R 处喷嘴的熔池上半部,除气泡常常冲击炉壁之外,液面波动及循环流动作用等使得该处冲击应力增大,而且是随着供气压力的增加而增大.在相同供气压力下,冲击应力随着喷嘴当量直径的减小而减小.同时结合炉壁所受剪切应力分布进行了综合分析,结果表明复吹条件下,渣线以下熔池高度的85—96%处受损最为严重.The model study of impact stress on the bottom of combined- blown converter was reported in Reference 〔1〕.In this work experi- mental study of impact stress and shear stress distribution on the furnace lining was carried out with slit type,circular slit type and multitube nozz- les used in the bottom injection process.Results show that the impact stress on the furnace lining increases gradually with distance from the bottom along the wall of furnace and reaches the maximum below the slag line due to intensive circulation and agitation of liquid metal.With 6 nozz- els installed (2 nozzels located at 0.3R,and 4 nozzels arranged at 0.6R), the impact stress on lining around the upper part of liquid pool increases with increasing gas feed pressure due to impact by bubbles,surface wave and circulating flow on the furnace wall.Under the same gas feed pressure,the impact stress decreases with decreasing equivalent nozzle diameter.The ana- lysis of the combined effects of impact stress and shear stress of furnace wall indicates that the furnace wall lining at 85-96% of liquid height is subject to most serious erosion.

关 键 词：喷射冶金 复吹转炉 炉衬侵蚀 

分 类 号：TF729[冶金工程—钢铁冶金]