To investigate the application of reformed coke oven gas (COG) in producing the direct reduction iron (DRI), we simulated a countercurrent gas solid moving bed reactor in which the iron ore pellet was reduced by reformed COG. An ordinary differential equation (ODE) was set based on the unreacted shrinking core model considering both mass and energy balances of the reactor. The concentration and temperature profiles of all species within the reactor were obtained by solving the ODE sys-tem. The solid conversion and gas utilization were studied by changing gas flow rate, solid flow rate, reactor length, and the ratio of O/CH4 to guide the practical application of COG in DRI production. Model results showed that COG was suitable for the DRI production. In order to meet the requirement of the industrial production, the minimum gas flow rate was set as 130,000 Nm 3/h, and the maximum production was 90 t/h. The reactor length and the mole ratio x (O): x (CH4) were depended on the actual industrial situations.
Juan Wu Shu-Qiang Guo Wei-Zhong Ding
. Investigation on the application of reformed coke oven gas in direct reduction iron production with a mathematical model[J]. Advances in Manufacturing, 2013
, 1(3)
: 276
-283
.
DOI: DOI10.1007/s40436-013-0031-4
1. Yang ZB, Zhang YY, Ding WZ et al (2009) Hydrogen production from coke oven gas over LiNi/ c -Al2O3 catalyst modified by rare earth metal oxide in a membrane reactor. J Nat Gas Chem 18(4):407–414
2. Bermu ´ dez JM, Fidalgo B, Arenillas A et al (2010) Dry reforming of coke oven gases over activated carbon to produce syngas for methanol synthesis. Fuel 89(10):2897–2902
3. Zhang JY, Zhang XH, Chen Z et al (2010) Thermodynamic and kinetic model of reforming coke-oven gas with steam. Energy 35(7):3103–3108
4. Munro WD, Amundson NR (1950) Solid-fluid heat exchange in moving beds. Ind Eng Chem 42(8):1481–1488
5. Amundson NR (1956) Solid-fluid interactions in fixed and moving beds fixed beds with small particles. Ind Eng Chem 48(1):26–35
6. Siegmund CW, Munro WD, Amundson Neal R (1956) Solid-fluid interactions in fixed and moving beds. Ind Eng Chem 48(1): 43–50
7. Parisi DR, Laborde MA (2004) Modeling of counter current moving bed gas-solid reactor used in direct reduction of iron ore. Chem Eng J 104(1–3):35–43
8. Sasan A, Rafsanjani HH (2008) Modeling and simulation of noncatalytic gas-solid reaction in a moving bed reactor. Chem Prod Process Model 3(1):1–29
9. Nouri SMM, Ebrahim HA, Jamshidi E (2011) Simulation of direct reduction reactor by the grain model. Chem Eng J 166(2):704–709
10. Xu H, Zou ZS, Yu AB (2008) A preliminary numerical simula-tion of Midrex reduction shaft furnace. Iron Steel 43(5):12–17
11. Xu H, Zou ZS, Zhou YS et al (2009) Preliminary numerical simulation of shaft furnace process for DRI production. J Mater Metall 8(1):7–11
12. Xu H, Zou ZS, Zhou YS et al (2009) Preliminary numerical simulation of shaft process for DRI production. World Iron Steel 9(2):1–4
13. Ma LK, Li T, Yang MJ et al (1995) Semi-industrial tests in production of sponge iron in shaft furnace with non-pre-reformed coke oven gas. Iron Mak 6:41–42
14. Cao CZ, Zhang FM, Mao QW et al (2012) Research and analysis of key technology of DRI production by using coke oven gas as reduction agent. Eng Technol 1:60–65
15. Zhao ZB, Ying ZW, Xu LX et al (2010) A discussion on con-sumption of coke-oven gas for DRI production in shaft furnace. J Mater Metall 9(2):88–91
16. Lan XD (1997) Thermodynamic analysis of coke oven gas for producing metallurgical reducing gas. Tianjin Metall 2:28–31
17. Yin ZQ (2000) Investigation on kinetics of making metallurgical reduction gas from coke oven gas. Hunan Metall 3:14–16
18. Yin ZQ (2000) Investigation on thermodynamics of making met-allurgical reduction gas from coke oven gas. Hunan Metall 6:11–14
19. Zhang JY, Yin ZQ (2004) Investigation on kinetics of making metallurgical reduction gas from coke oven gas. Energy Metall Ind 23(3):37–38
20. Hua YX (2004) Kinetics of process metallurgy introduction. Metallurgical Industry Press, Beijing, pp 149–150
21. Wang ZL, Zhou YP (2001) Physical chemistry. Higher Education Press, Beijing, pp 311–313
22. Fang J (2010) The process and theory of non-blast furnace iron making. Metallurgical Industry Press, Beijing, pp 68–70
