Preheating unit by using Xiapu gas is introduced, the key point that welding casing can be preheated without getting into furnace has been achieved.

介绍了利用霞普气制作的预热装置，实现了压缩机焊接机壳不需进炉就能预热的关键。

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During lowering charge level with water spraying into the blast furnace, the gas is recovered and the charge level is judged by the blast volume not by special stock rod.

操作时采用空料线法(从炉顶打水)，回收高炉煤气，不安装特殊探尺，用风量判断料面行程。

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Coke gas was introduced into blast furnace hot air stove by use of ejector to increase air temperature so as to achieve the aim of reducing coke rate and increasing the production.

利用引射器将低压焦炉煤气引入高炉热风炉中以提高风温，达到了降低焦比、提高生铁产量之目的。

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