The “Multiphase Multicomponent Reactive Flow, Heat and Mass Transfer Program” developed in FORTRAN 95/2000 language was used to obtain numerical solution of equations describing the gas flow in the induration furnace and inside of the pellet, reaction rates and heat transfer, coupled with evolution of gas composition.
Mass and heat flow observers and data reconciliation for iron ore induration furnaces Author links open overlay panel S. Makni S. Bebe Ekongolo D. Hodouin Show more
In this work, a mathematical model of the pilot scale iron ore pellet induration furnace is presented. The validity of the model has been verified by performing separate experiments of
Iron ore pelletizing systems. Iron ore fines are agglomerated into pellets and then indurated using a furnace to create iron ore pellets. These are typically fed to a blast furnace or DRI plant as part of the process to make steel.
Investigation of factors affecting pellet strength in straight Production of iron oxide pellets from iron ore fines involves different length) and fired in the 116 m length pellet plant induration
Iron ore pelletizing 5 Pellet quality Because the induration of the pellets occur in the rotary kiln, the pellets produced in a Grate-Kiln system are consistently of higher
In this work, a mathematical model of the pilot scale iron ore pellet induration furnace is presented. The validity of the model has been verified by performing separate experiments of subprocesses: drying, firing and cooling.
A Dynamic Mathematical Model of the Complete Grate/Kiln Iron-Ore Pellet Induration Process J.A. THURLBY Induration (drying and hardening) of iron ore pellets is an energy-intensive feed preparation step for both the blast furnace and direct reduction routes to iron.
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A mathematical model of drying and preheating processes in a traveling grate was presented based on the laws of mass, momentum, heat transfer, and drying semiempirical relations. A field test was systematically carried out in a traveling grate. The effects of pellet diameter, moisture, grate velocity, and inlet gas temperature on the pellet bed temperature were studied. The average relative
A mathematical model of drying and preheating processes in a traveling grate was presented based on the laws of mass, momentum, heat transfer, and drying semiempirical relations. A field test was systematically carried out in a traveling grate. The effects of pellet diameter, moisture, grate velocity, and inlet gas temperature on the pellet bed temperature were studied. The average relative
Abstract Mathematical model for a pilot scale iron ore pellet induration furnace has been developed which considers the process of induration including the reactions of limestone, magnetite and coke. The differential equations of energy, mass and momentum are solved simultaneously. The profiles of temperature, pressure and concentration are obtained. Performing separate experiments on sub
Recrystallization of Fe 2 O 3 During the Induration of Iron Ore Oxidation Pellets Guanghui Li, Tao Jiang, Yuanb o Zhang and Zhaokun Tang Department of Ferrous Metallurgy, Central South University Changsha, Hunan, China 1. Introduction Magnetite and hematite concentrates are the two main raw materials for oxidized pellet production. Magnetite concentrates have more predominance due to the heat
In this work, a mathematical model of the pilot scale iron ore pellet induration furnace is presented. The validity of the model has been verified by performing separate experiments of subprocesses: drying, firing and cooling.
[7] S. Nordgren, J. Dahl, C. Wang, B. Lindblom, Process integration in an iron ore upgrading process system: analysis of mass and energy flows within a straight grate induration furnace, 18th International Congress of Chemical and Process Engineering, (2008).
Iron Ore Processing for the Blast Furnace (Courtesy of the National Steel Pellet Company) The following describes operations at the National Steel Pellet Company, an iron ore mining and processing facility located on the Mesabi Iron Range of Minnesota. Creating steel from low-grade iron ore requires a long process of mining, crushing, separating, concentrating, mixing, pelletizing, and
The induration process of iron ore pellets, fundamental to obtain adequate mechanical strength of the pellets, occurs in the burning zone region in the furnace, and is the process step in which all properties of agglomerates are obtained.
Some mathematical modeling of an industrial-scale iron ore pellet induration process which considered mass, heat and momentum transfers was carried out by Sadrnezhaad et al. [8]. In this model, variations of gas composition through the furnace, gas concentration change from one step to another one, temperature distribution in the pellets, and geometry effects were investigated. The results of
2007 effect of size of iron ore pellets on its reduction kinetics a thesis submitted in partial fulfilment of the requirement for the degree of
Fuel reduction Computerised Heat & Mass balance has been developed in close interactions with existing high efficiency Grate-Kiln plant operators VFD drives for the fans Variable Frequency Drives are expected to save 20%
Heat balance Conclusions In the blast furnace burden (consists of iron ore sinter/pellets +coke +limestone/lime) at 298K is charged from top. During its descent, there occurs heat and mass exchange with the hot gases which are moving up. Hot gases
balance modules for sintering, pelletising and a rigorous two-stage heat and mass balance model of blast furnace ironmaking. Mass balance and cost models are applied for steelmaking, casting and rolling. The use of a heat and mass balance allows accurate comparison of the impact of raw material properties on blast furnace operation. The impact of minor elements, such as alumina, silica and
Abstract. The performance of iron-ore pellet induration plants, including their energy consumption, is critically dependent on the relative flowrates and conditions of gas streams involved in the process.
The straight grate induration furnace has been divided into four different zones, where a mass and energy balance has been calculated for each zone.
A mathematical model is developed for induration of the iron-ore pellets in an industrial-scale plant based on the laws of mass, heat and momentum transfer. Physicochemical processes occurring during
Iron Ore Pellets Induration Solutions Iron ore green balls are soft and easy to break So after the pelletizing and screening operations, iron ore pellets have to be hardened in a furnace through a firing process,Two indurating furnace technologies dominate the pelletizing industry, the straight travelling grate and the grate-rotary kiln . Online Servers; Straight Grate Iron Ore Pelletisation
Mathematical model for a pilot scale iron ore pellet induration furnace has been developed which considers the process of induration including the reactions of limestone, magnetite and coke. The differential equations of energy, mass and momentum are solved simultaneously.
-Final point of pellet induration in grate kiln system Rotation of kiln exposes entire pellet bed to heat radiating from the burner resulting in uniform pellet quality
Illustration Let me illustrate material balance through a problem Consider a blast furnace which is charged with iron ore coke and flux of the following composition:
c 2005Wiley-VCHVerlagGmbH&Co.KGaA,Weinheim 10.1002/14356007.b04339 Metallurgical Furnaces 1 MetallurgicalFurnaces For other industrial reactors and their applications, see →Stirred-Tanc and Loop Reactors, →Tubular
-Final point of pellet induration in grate kiln system Rotation of kiln exposes entire pellet bed to heat radiating from the burner resulting in uniform pellet quality
Mass-heat Balance and Energy-saving Technique Analysis on Oxidative Pellet Kiln. FENG Jun-xiao1,LV You-yang1,ZHANG Yong-ming2,YANG Jin-bao2
influence of Pellet Size on Quality of Iron Ore Pellets. S.P.E. Forsmo [6] attempted to revaluate the S.P.E. Forsmo [6] attempted to revaluate the relationship behaviour of wet iron ore pellet with variation in bentonite binder.
grate induration furnace where the final product of iron ore pellet is produced. The furnace is basically a huge heat exchanger where process gases passing through the pellet bed in a both up-draft and down-draft direction. The main purpose of the induration furnace is to dry, fire and cool the iron ore pellet. A waste heat recovery boiler is installed to the induration furnace. The waste heat
effect of size distribution and water content on properties of iron ore pellets a thesis submitted in partial fulfillment of the requirement for the degree of
A one-dimensional numerical model was developed to simulate the effects of heat and mass transfer on the formation of oxides of nitrogen (NO x) in a rotary kiln furnace for iron oxide pellet induration.
A mathematical model is described for the induration of iron ore pellets on a moving grate. The validity of the model has been demonstrated, both for the performance of an operating plant and for the firing of pellets in a laboratory pot grate furnace. The model permits calculation of pellet bed temperature profiles and the resulting product quality, together with overall heat and mass
Iron Ore Pelletizing Ore beneficiation Additives silo Bentonite PELLETIZING DRUMS Screw mixer Iron ore, conveyor belt 7-10% moisture Pellets (green)