Assimilating method has been summarized on the design of hot-blast exchanger for cupola gas remaining heat, of which design theory has been analyzed with a model and example. 本文总结了冲天炉炉气余热回收热风换热器的比拟设计法，对比拟法的设计原理进行了分析，并且给出了一个模型换热器和设计实例。
In this study, the kinds of additive and extraction conditions are sieved by orthogonal designing method. 本文用正交试验设计法对添加剂种类和浸取条件进行筛选研究。
