将出无氧化加热段的带钢继续加热到热处理制度要求的温度，并在保护气氛中对带钢表面微弱的氧化膜起还原作用。
The strip is heated here to required temperature and the light oxide film on the strip is reduced by protection atmosphere.
无氧化段由入口密封室，废气预热区，直接加热区，炉喉，废气排放系统组成。
The non-oxidizing zone is consisted of entry sealed room, waste gas preheating zone, direct heating zone, and furnace nozzle and flue gas exhausting system.
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