The non-oxidizingzone is consisted of entry sealed room, waste gas preheating zone, direct heating zone, and furnace nozzle and flue gas exhausting system.
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。
2
Below the secondary air inlet is reducing atmosphere combustion zone for big particle. Above the secondary air inlet is oxidizing atmosphere combustion zone.