Two kinds of potentially reusable waste energies are discharged from the sinter plants:
‧the sensible heat from the waste gases from the sintering machines
‧the sensible heat of the cooling air from the sinter cooler.
Partial waste gas recirculation is a special case of heat recovery from waste gases from sintering machines and is dealt with in BAT 23. The sensible heat is transferred directly back to the sinter bed by the hot recirculated gases. At the time of writing (2010), this is the only practical method of recovering heat from the waste gases.
The sensible heat in the hot air from the sinter cooler can be recovered by one or more of the following ways:
‧steam generation in a waste heat boiler for use in the iron and steel works
‧hot water generation for district heating
‧preheating combustion air in the ignition hood of the sinter plant
‧preheating the sinter raw mix
‧use of the sinter cooler gases in a waste gas recirculation system.
從燒結工場所排出，主要兩種可再使用廢熱能源：
‧燒結機的廢氣顯熱
‧燒結冷卻機的風冷空氣中顯熱
燒結工場燒結機一部分廢氣再循環以回收燒結機的廢氣顯熱，對應BAT23，為廢熱回收的應用特例。廢氣顯熱經由再循環系統，被直接送回燒結床回收利用。在本文寫作時(2010)，這是唯一從廢氣回收熱能的實務方式。
從燒結冷卻機熱氣回收顯熱，可以透過以下一個或多個組合技術來達成：
‧設立廢熱鍋爐產生蒸汽用於用於在鋼鐵廠中
‧產出熱水應作為區域供熱
‧預熱燒結機點火罩的燃燒進氣
‧預熱進入燒結機之混合原料
‧再循環使用燒結冷卻床之廢氣顯熱
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At some plants, the existing configuration may make costs of heat recovery from the sinter waste gases or sinter cooler waste gas very high.
The recovery of heat from the waste gases by means of a heat exchanger would lead to unacceptable condensation and corrosion problems.
在某些工廠既有結構上從燒結機廢氣或燒結冷卻機廢氣回收熱能可能會使成本墊高。在應用上，必須考慮經濟有效性及可能衍生的設備腐蝕問題。
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Iron and Steel Production (2013) 9.2
