长寿高炉炉底传热学分析

 高炉侵蚀归根结底是动量传输、热量传输和质量传输这三传的问题。如果炉底热面凝结一层渣铁壳，将有利于高炉长寿。目前，虽然已经有了许多数值求解三维导热微分方程的软件，但对于设计人员来说，快速评估所设计炉底热面能否形成渣铁壳有重要意义。笔者利用一维温度场分析(热阻分析)方法，通过炉底各层对冷却水冷却能力及1 150 ℃等温线的影响，估测渣铁壳的形成。最终得到影响炉底侵蚀的限制性环节，为优化高炉炉底结构设计，提高高炉寿命奠定理论基础。

Analysis of Heat Transfer on Bottom of Long-Life Blast Furnace

The erosion of blast furnace is a problem of three kinds of transfer (momentum transfer, heat transfer and mass transfer). One of effective measures for prolonging BF campaign is to form a layer of slag metal skull on the bottom. Although a large number of software for the numerical solution of conduction diffusion partial differential equations have been developed, it is beneficial for BF designers to evaluate speedily the formation of protection shell. The influence of each layer of bottom on the cooling ability of cooling water and the 1 150 ℃ isothermal line was analyzed and the formation of slag metal skull was estimated. In addition, the critical link of the erosion of BF bottom was established. As a result, the design of the bottom was made to prolong blast furnace campaign.