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。
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.
指出旋涡炉顶吹炼铜法应作为葫芦岛锌厂粗铜冶炼技改项目的首选工艺。
The Contop Process become first one for Copper Smetling innovation at Huludao zine smelter.
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