铅在高炉内的渗透机理

结合昆钢生产实际,对高炉内铅的渗透机理进行了系统的考察与研究.结果表明:高炉内铅不能简单地通过砖衬的原始气孔进行渗透.铅在高炉砖衬内的渗透行为主要是通过各种缝隙,特别是炉壳与砖衬之间的间隙而进行的.当耐火砖受侵蚀较严重时,铅进入砖内部并发生膨胀变形,进一步破坏耐火材料的组织结构.基于新的铅渗透机理,对高炉排铅孔设计理念进行了探讨,为铅负荷较高的高炉进行合理炉型设计、安全稳定生产和提高高炉寿命提供了参考依据.

Permeating Mechanism of Lead in Blast Furnace

Based on the production practice in Kunming Steel Company,a systematical investigation was done for the permeating mechanism of lead in blast furnace.The results revealed that lead is hard to permeate the brick lining through the original pores in the blast furnace but mainly permeates through different gaps,especially the gap between furnace shell and brick lining.When a refractory brick is seriously eroded,lead enters into the inside of the brick to swell out and deform it,thus damaging further its inner structure.According to the new permeating mechanism mentioned above,a new concept on the design of lead removal hole in furnace body is explored,which provides a useful reference for the rational design of furnace body,stable production and longer service life of the blast furnace under high lead load.