Experimental investigation on the drying process of the sinter mixture

Achieving efficient recovery and utilization of waste heat during sintering is crucial for iron and steel plants. Previous studies on waste heat utilization have shown that steam and electricity are generated, after which the air and sinter mixture is preheated. However, few studies on the mechanism...

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Bibliographic Details
Published in:Powder technology 2012-03, Vol.218, p.1-4
Main Authors: Dong, Hui, Jia, FengRui, Zhao, Yong, Wang, Meng, Cai, JiuJu
Format: Article
Language:English
Subjects:
air
Applied sciences
Chemical engineering
Drying
Drying process
Drying rate
electricity
Exact sciences and technology
heat
iron
Iron and steel plants
Miscellaneous
Moisture content
Powder technology
Sinter
Sinter mixture
Sintering
Sintering (powder metallurgy)
Sintering, pelletization, granulation
Solid-solid systems
steam
steel
temperature
Utilization
Waste heat
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Summary:Achieving efficient recovery and utilization of waste heat during sintering is crucial for iron and steel plants. Previous studies on waste heat utilization have shown that steam and electricity are generated, after which the air and sinter mixture is preheated. However, few studies on the mechanisms of the drying process of the sinter mixture exist. This paper presents the results of an experimental investigation on the drying process that occurs during sintering. The results show that the drying process of the sinter mixture consists of three stages, namely, a short rising-rate stage, a long constant-rate stage, and a falling-rate stage. The moisture contents of specimens are 0.055–0.06 kg/kg in the first 5–7 min, and the critical moisture contents are approximately 0.023–0.03 kg/kg. The drying efficiency is mainly attributed to the temperature and the flow rate of the hot air, and the former one is more significant. The moisture contents of specimens are 0.055 – 0.06 kg/kg in the first 5 – 7 min, and the critical moisture contents are approximately 0.023 – 0.03 kg/kg. The drying efficiency is mainly attributed to the temperature and the flow rate of the hot air, and the hot air temperature is more significant. [Display omitted] ► We perform the experiments which describe the sinter mixture's drying fundamental. ► We find the drying process of sinter mixture consists of three stages. ► The sinter mixture’s critical moisture content ranges from 0.023 kg/kg-0.03 kg/kg. ► Increasing hot air flow rate and temperature will shorten the drying time. ► The hot air temperature has more influence on the drying time.
ISSN:0032-5910
1873-328X
DOI:10.1016/j.powtec.2011.10.063