混铁炉炉底残留物爆破切割技术及炉壁致裂分析  

A BLASTING TECHNOLOGY FOR CUTTING OF SLAG AT THE BOTTOM OF METAL MIXER AND ANALYSIS ON THE FRACTURE OF MIXER WALL

作　　者：范志强[1] 沈兆武[1] 蒋耀港[1] 

机构地区：[1]中国科学技术大学近代力学系,合肥230037

出　　处：《工程爆破》2013年第4期42-45,共4页Engineering Blasting

基　　金：国家自然科学基金重点项目(51134012);国家自然科学基金面上项目(51174183)

摘　　要：采用爆破切割技术对混铁炉炉底残留物进行清除,并从爆炸冲击波和密封容器内准静态气体压力两方面对爆破方案进行了安全校核。分析混铁炉炉壁裂纹产生的原因可知,混铁炉原有裂纹、炉壁弱化区和铆钉孔等结构缺陷的存在是导致炉壁爆破劈裂的主要原因。因此在采用爆破手段清除混铁炉炉底残铁时,除需进行相应安全校核外,还应充分考虑炉体自身的结构缺陷。对于已有裂纹损伤的炉体应在爆破前进行加固处理,同时采用更精细的分段延时网路实施爆破,以防止爆炸冲击荷载对炉体产生损伤。相关分析对类似工程可提供一定的参考。Using controlled blasting technique to cut the slag at the bottom of the metal mixer, and the check of blasting safety has been carried out in the fields of both explosion shock wave and quasi-static gas pressure subjected to the explosion in the sealed blasting container. Fracture analysis of the mixer shell showed that structure defects such as initial crack, weakening area on the shell and rivet holes were the primary cause of the fracture of mixer shell. Therefore, structure defects of mixer itself should be serious- ly considered except for the blasting safety checking of the above when using blasting technology to clear a- way residual slag at the bottom of the mixer. To avoid the mixer been damaged by explosion impact load, reinforcement measures should be adopted for cracks and weakening areas of the contain before the blas- ting, and a finer segmented time-delay blasting network should be designed. Correlation analysis could provide reference for similar project.

关 键 词：混铁炉 残留物 爆破切割 致裂分析 

分 类 号：O381[理学—流体力学]