mass gas balance of induration in straight grate

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Process development of the straight grate process for iron ,

This thesis describes the development of a simulation model replicating a straight grate induration furnace The project has been performed in close collaboration with the iron ore pellets producing company LKAB , Additional tools of validation consist of a mass balance, heat balance and fuel calculations , the model prediction ....

Process integration in an iron ore upgrading process ,

project, the mass and energy flows within a straight grate induration furnace have been analysed The outcome of the analysis will in the future constitute as a basis towards a total mass and energy balance for the whole production chain within the facility in Malmberget Later on the model will be used to optimize, primarily, energy ....

Great kiln by Perumin -

Sep 02, 2013· A refractory lined rotary kiln is used for induration In a straight grate, the grate cars have to go through the drying and induration zon So, a deep bed of pellets with a hearth layer is ....

Computational Materials Science

Straight grate Induration process Iron ore pellet Fuel consumption Greenhouse gases abstract 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...

Mathematical model for a straight grate iron ore pellet ,

Equations and procedures for gas flow and pressure balance calculations within a dynamic mathematical model of the complete grate/kiln induration process are presented...

University of Florida

An energy balance test was systematically carried out on a grate-kiln in China And the results show that energy consumption resulting from drying accounts for 28% in the total amount of energy required for pellet induration...

Agglomeration of Iron Ores - 1st Edition - Ram Pravesh ,

Aug 23, 2019· 144 Straight Grate Process of Pellet Induration 145 Grate-Kiln-Cooler Process 146 Comparison of Straight Grate Process vis-à-vis Grate Kiln Process 147 Factors influencing the Induration Process (and Pellet Quality) 148 Fuel Substitution in Pellet Induration Chapter 15: Reactions and Formation of Phases during Induration 151 Preamble...

SINTERING AND PELLETISATION OF INDIAN IRON ORES

Travelling grate machine used for induration of green pellets resembles the well-known sintering machine of Dwight Lloyd design Travelling grate machine is having completely closed hood with many interconnected thermal zones for recirculation of [tpvrdd gas leading to maximum heat recovery The machine consists of three main parts; a...

CFD model of a straight-grate furnace for iron oxide ,

Nov 01, 2014· A three-dimensional CFD model of a straight grate furnace for indurating iron-oxide pellets was developed for exploring conditions of furnace operation for fluid flow, heat transfer and reactions The model includes reactions for natural gas combustion in the gas phase and calcination and magnetite oxidation as well as drying in the pellet bed...

Process development of the straight grate process for iron ,

This thesis describes the development of a simulation model replicating a straight grate induration furnace The project has been performed in close collaboration with the iron ore pellets producing company LKAB , Additional tools of validation consist of a mass balance, heat balance and fuel calculations , the model prediction ....

Effective Use of Available Heat for Maintaining a High ,

the heat exchanger is directed into one of the exhaust gas fans The heat from the recovery boiler is used as comfort heat for the factory buildings Figure 2 shows a schematic of the MK3 straight grate induration furnace 23 Effect of Green Pellet Temperature on Induration Process Within the straight grate induration furnace, many param-...

Model and Simulation of a Ported Kiln for Iron Oxide ,

Feb 01, 2003· A mathematical model of a ported kiln for iron oxide pelletizing was developed to simulate the effects of under‐bed air injection on kiln fuel requirements and magnetite oxidation A tanks‐in‐series model was used to set up material and energy balance equations for countercurrent flow of solids and gas through the kiln The diffusion‐limited, shrinking core model was used for the ....

[PDF] Dynamic simulation of pellet induration process in ,

Abstract A mathematical model of pellet induration process in the straight-grate system is presented The important physical and chemical phenomena known to affect the heat and mass transfer in the process have been taken into account in the formulation of the model These include heat transfer between gas and pellet, gas flow, evaporation and condensation of moisture, oxidation of magnetite ....

iron ore induration process - danisovicovacz

01/08/2011 Iron ore induration is an essential step in the iron ore mineral processing and is considered to be critical for the downstream ironmaking steps In this work, a multi-objective optimization task (simultaneous maximization of throughput and Tumble index, TI) of an industrial iron ore induration process has been studied to improve the ....

Study of the induration phenomena in single pellet to ,

induration furnace It was taken into account coupled phenomena of momentum, energy and mass transfer between gas and particles within the agglomerat The finite volume method was used to discretize the transport equations of momentum, mass and energy describing the behavior of a pellet in an industrial traveling grate furnace Model results ....

Dynamic simulation of pellet induration process in ,

A mathematical model of pellet induration process in the straight-grate system is presented The important physical and chemical phenomena known to affect the heat and mass transfer in the process ....

Computational Materials Science

Straight grate Induration process Iron ore pellet Fuel consumption Greenhouse gases abstract 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...

MATHEMATICAL MODEL FOR ENERGY SAVING IN ,

grate, where they are dried, fired at elevated temperatures to increase the pellet strength and to oxidize the magnetite and are then cooled The percentages of additives and coke depend on the composition of the mineral The aim of this paper is to study, both experimentally and theoretically, the possibility of energy saving in the induration...

Computational Materials Science

Straight grate Induration process Iron ore pellet Fuel consumption Greenhouse gases abstract 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...

Eiaion of Wae ea fro Ehau ae of an ron re elleiing lan in ran

Nordgren et al [7] analyzed mass and energy flows through the straight grate induration furnace of an iron-ore pelletizing plant in Malmberget The aim of their study was to establish a framework for mass and energy balances in the whole process and also, to ,...

Energy-Efficient Indurating Machine of the Fourth ,

Aug 03, 2020· The thermal scheme and the main elements of a new-generation energy-efficient indurating machine are presented in Fig 1 The straight-grate indurating machine includes a movable grate (1) composed of pallet cars that sequentially transports the raw pellets loaded thereon it through the following process zones: drying (2), heating (3), induration (4), after-firing (5), and cooling (6)...

US2608481A - Heat-treating solids - Google Patents

US2608481A US776351A US77635147A US2608481A US 2608481 A US2608481 A US 2608481A US 776351 A US776351 A US 776351A US 77635147 A US77635147 A US 77635147A US 2608481 A US2608481 A US 2608481A Authority US United States Prior art keywords pellets column gas heat temperature Prior art date 1947-09-26 Legal status (The legal status is an assumption and is not a ,...

A Study for Demand and supply balance of DR grade pellets ,

Demand and supply balance of DR grade pellets For 17th Middle East Iron and Steel Conference , (Straight grate and Grate-kiln) can , Mechanism of induration Process Gas Overheating Proper Heating Inadequate Heating Pellet Layer Hearth Layer D G^G GXG !F!V...

Mathematical model for a straight grate iron ore pellet ,

Dec 01, 2008· mass flow of gas (kg , Mass balance for the Firing zone can for example be written as follows: , The highly integrated nature of the pellets and the gas flow throughout the straight grate induration system means that small changes in the process conditions are reflected throughout the whole operation The main usefulness of the developed ....

Development and application of thermal mathematical model ,

Jun 05, 2011· Mass density of pellet and gas, , Dynamic simulation of pellet induration process in straight-grate system [J] International Journal of Mineral Processing, 2008, , et al Mass and thermal balance and energy-saving analysis of the grate-kiln system [J] Sintering and Pelletizing, 2007, 32(6): 29–34 (in Chinese)...

CONTRIBUTIONS TO THE TECHNOLOGY COMPARISON ,

straight grate) and in Canada, where IOC operates 4 straight grates at Carol Lake, New Foundland, with a combined capacity of 13 million t/a The installed pelletizing capacity world-wide amount totals 685 million t/a with 410 million t/a coming from straight grates and 226 million t/a coming from grate-kilns...

2008_SADRNEZHAAD_Mathematical model for a straight grate ,

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 Different conditions are used for determination of the effect of addition of carbon to the green pellets on performance of the induration process This results in a productivity enhancement of 20%, an NG Fuel consumption decrease of 17% ....

iron ore induration process - danisovicovacz

01/08/2011 Iron ore induration is an essential step in the iron ore mineral processing and is considered to be critical for the downstream ironmaking steps In this work, a multi-objective optimization task (simultaneous maximization of throughput and Tumble index, TI) of an industrial iron ore induration process has been studied to improve the ....

(PDF) Review on mathematical models for travelling-grate ,

phase, the overall mass balance s account for changes in the gas superficial mass flow rate (Eq 6) , and component 592 Mariana M O Carvalho et al / Energy Procedia 120 (2017) 588–595...

Energy analysis of pelletising in a straight grate ,

upgrading process system - analysis of mass and energy flows within a straight grate induration furnace Proceeding of 18th International Congress of Chemical and Process Engineering, Prague, Czech Republic, 24-28 Aug 2008 C Nordgren S, Dahl J, ,...