Mathematical model of COREX melter gasifier: Part I. Steady-state model

The COREX melter gasifier is a countercurrent reactor to produce liquid iron. Directly reduced iron (DRI), noncoking coal, and other additives are charged to the melter gasifier at their respective temperatures, and O2 is blown through the tuyeres. Functionally, a melter gasifier is divided into three zones: a moving bed, fluidized bed, and free board. A model has been developed for the moving bed, where the tuyere region is two-dimensional (2-D) and the rest is one-dimensional (1-D). It is based on multiphase conservation of mass, momentum, and heat. The fluidized bed has been treated as 1-D. Partial equilibrium is calculated for the free board. The calculated temperature of the hot metal, the top gas, and the chemistry of the top gas agree with the reported plant data. The model has been used to study the effects of bed height, injection of impure O2, coal chemistry, and reactivity on the process performance.

[1]  Takeda Kanji,et al.  Experiments and Simulation of the Liquid Flow in the Dropping Zone of a Blast Furnace , 1993 .

[2]  Yotaro Ohno,et al.  Effect of Horizontal Gas Flow on Liquid Dropping Flow in Two-dimensional Packed Bed , 1988 .

[3]  Iwao Muchi,et al.  Mathematical Model of Blast Furnace , 1967 .

[4]  W. H. Ray,et al.  The modeling of hematite reduction with hydrogen plus carbon monoxide mixtures: Part I. The behavior of single pellets , 1976 .

[5]  Yutaka Oda,et al.  Analysis on Liquid Flow in the Dripping Zone of Blast Furnace , 1987 .

[6]  鉄鋼基礎共同研究会.  Blast furnace phenomena and modelling , 1987 .

[7]  Hiroshi Nogami,et al.  A mathematical model for blast furnace reaction analysis based on the four fluid model , 1997 .

[8]  D. Gunn.  Transfer of heat or mass to particles in fixed and fluidised beds , 1978 .

[9]  Lars-Peter Wiktorsson,et al.  Kinetic parameters for coal pyrolysis at low and high heating rates: a comparison of data from different laboratory equipment , 2000 .

[10]  Ashok Kumar Lahiri,et al.  Process simulation of cupola , 1998 .

[11]  Jong-Kyu Yoon,et al.  The Effects of Operational Parameters on the Transport Phenomena in COREX Melter–Gasifier , 2000 .

[12]  N. Amundson,et al.  The combustion behavior of retorted shale particles , 1990 .

[13]  Paul Zulli,et al.  Modeling the discontinuous liquid flow in a blast furnace , 1997 .

[14]  J. Szekely,et al.  On the importance of the inertial terms in the modeling of flow maldistribution in packed beds , 1976 .

[15]  E. Donskoi,et al.  Approximate modelling of coal pyrolysis , 1999 .

[16]  G. S. Gupta,et al.  Model Studies of Liquid Flow in the Blast Furnace Lower Zone , 1996 .

[17]  Hiroshi Nogami,et al.  Analysis of Actual Blast Furnace Operations and Evaluation of Static Liquid Holdup Effects by the Four Fluid Model , 1998 .

[18]  Peter R. Solomon,et al.  General model of coal devolatilization , 1987 .

[19]  Jun-ichiro Yagi,et al.  Simulation Model of the Gas-Liquid Flows in the Packed Bed , 1991 .

[20]  Julian Szekely,et al.  The interaction between gas and liquid flow in a simulated blast furnace: A preliminary investigation , 1979 .

[21]  Takanobu Inada,et al.  Three-dimensional Dynamic Simulator for Blast Furnace , 1999 .

[22]  E. F. Greene,et al.  Chemical reactions in shock waves , 1964 .

[23]  S. Patankar.  Numerical Heat Transfer and Fluid Flow , 2018, Lecture Notes in Mechanical Engineering.

[24]  Jun-ichiro Yagi,et al.  Mathematical Modeling of the Flow of Four Fluids in a Packed Bed. , 1993 .

[25]  Takeshi Furukawa,et al.  Simulation of Transport Phenomena around the Raceway Zone in the Blast Furnace with and without Pulverized Coal Injection , 1993 .

[26]  Sang Hoon Joo,et al.  A Development of Computer Model for Simulating the Transport Phenomena in COREX Melter-gasifier , 1999 .

[27]  Peter R. Solomon,et al.  Progress in coal pyrolysis , 1993 .

[28]  Hideyuki Aoki,et al.  A numerical study on the combustion of a low temperature-carbonized semi-coke particle , 1999 .

[29]  J. Szekely,et al.  The influence of carbon deposition on the reduction kinetics of commercial grade hematite pellets with CO, H2, and N2 , 1983 .

[30]  F. C. Lockwood,et al.  Integrated Mathematical Model of Pulverised Coal Combustion in a Blast Furnace , 1997 .

[31]  Jun-ichiro Yagi,et al.  Measurement of Heat Transfer Rate between Particle and Fluid in Counter-current Moving Beds , 1990 .

[32]  W. V. Swaaij,et al.  Effects of intraparticle heat and mass transfer during devolatilization of a single coal particle , 1985 .

[33]  Yutaka Ujisawa,et al.  Operation and Design of Scrap Melting Process of the Packed Bed Type , 1999 .

[34]  Jun-ichiro Yagi,et al.  Theoretical Estimations on the Longitudinal Distributions of Process Variables in Blast Furnace and on Its Productivity , 1970 .

[35]  W. Hallett,et al.  A numerical model for packed-bed combustion of char particles , 2000 .

[36]  Hiroshi Nogami,et al.  A Mathematical Model of Four Phase Motion and Heat Transfer in the Blast Furnace , 1997 .

[37]  J. Yoon,et al.  A Numerical Study on the Combustion Phenomena Occurring at the Post Combustion Stage in Bath-type Smelting Reduction Furnace. , 1993 .