Towards Greener Industry: Modelling of Slag Heat Recovery

被引：2
|
作者：
Nick, Reza Safavi [1 ,2 ]
Leinonen, Virpi [3 ]
Mayra, Juha [3 ]
Bjorkvall, Johan [1 ]
机构：
[1] Swerim AB, Proc Met Dept, Primary & Secondary Steelmaking Grp, SE-97437 Lulea, Sweden
[2] KTH Royal Inst Technol, Dept Mat Sci & Engn, Div Appl Proc Met, SE-10044 Stockholm, Sweden
[3] SFTec Oy, FI-90570 Oulu, Finland
来源：
METALS | 2021年 / 11卷 / 07期
关键词：
mathematical modelling; computational fluid dynamic; slag heat recovery; heat exchanger; drying; slag energy content; heat recovery technology; RecHeat;
D O I：
10.3390/met11071144
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The steel industry, in accordance with the momentum of greener industry, has welcomed the changes and is actively pursuing that objective. One such activity is the commitment to energy recovery from by-products such as slag since the average energy content of ferrous slags is around 1 to 2 GJ/t(slag). The recovered energy could, then, be used in heating or drying process among others. The RecHeat was designed and modelled iteratively to achieve an optimised heat recovery apparatus. The model shows that the temperature of different sections of the heat exchanger part varies from 170 to 380 degrees C after slag pouring while the average air temperature at the entrance of the heat exchanger is less than 150 degrees C. Furthermore, the temperature of the fluid medium changes from 125-140 degrees C to 260-340 degrees C from one end of the heat exchanger part to the other at the end of the simulation. The outlet temperature at the end of the simulation is calculated to be around 340 degrees C, which shows an increase by at least 200 degrees C in the temperature of the air entering the apparatus.
引用
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页数：13
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