Abstract: The structure of distributing chute in blast furnace was designed and optimized to improve the wear resistant performance. Based on the characteristics of the burden motions and the chute wear conditions, the combination of the burden accumulation liner and the smooth liner was applied. Then the buffer effects of the piled burden layer cushions with different thicknesses were simulated by using discrete element method, and the parameters of the chute liner were optimized to match the burden charging operations. The results show that the abrasive wear is the main cause of the chute wear failure, the burden layer piled at the bottom of the chute may effectively disperse the burden impacts on the chute and reduce the abrasive wear, and plied burden thicknesses of no less than 60mm are recommended. The burden piled at the bottom of the optimized chute liner increases 32.13%, and the total burden passing through the chute may increase 15.5%.  

Key words: distributing chute, abrasive wear, wear resistance, structure design

摘要： 针对高炉布料溜槽的磨损失效，对溜槽进行了抗磨损结构设计和优化。在分析炉料运动和溜槽磨损的基础上，确定采用料磨料式和光面式衬板相结合的溜槽结构，并采用离散单元法分析了不同厚度料垫的炉料缓冲效果，根据高炉装料制度对溜槽耐磨衬板的结构参数进行了优化。结果表明：溜槽磨损属于磨料磨损，在炉料冲击区域设置不小于60mm厚的料垫，能够有效分散炉料对溜槽的冲击，减少磨料磨损，优化后的料磨料式衬板在溜槽底部多储存了32.13%的炉料，溜槽总过料量增加了15.5%。

关键词: 布料溜槽, 磨料磨损, 抗磨损, 结构设计