straight grate pellet induration

Dynamic simulation of pellet induration process in ...

2008-12-5  Fig. 1 depicts schematic of a typical straight-grate induration system. The grate bars fixed on a moving strand are first covered with a layer of burnt pellet, known as hearth-layer. The green pellets containing 7 to 9 wt.% free moisture and 10 to 14 mm in size are then fed onto this layer and travel together with the sub-layer through several thermal zones of the furnace.

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Mathematical model for a straight grate iron ore pellet ...

2021-11-4  Request PDF Mathematical model for a straight grate iron ore pellet induration process of industrial scale a b s t r a c t A mathematical model is developed for induration of the iron-ore ...

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Energy analysis of pelletising in a straight grate ...

2016-9-29  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, Lindblom B. Green pellet temperature influence of production

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Mathematical model for a straight grate iron ore pellet ...

2008-12-1  Two types of systems are usually used for induration of the iron-ore pellets: (a) straight-grate and (b) grate-kiln process. A hearth layer of fired pellets is used in the former to protect grate bars from excessive heating. Fresh pellets are charged onto a hearth layer of the fired ones.

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Optimizing the operation of straight-grate iron-ore pellet ...

Mathematical models of straight-grate pellet induration processes have been developed and carefully validated by a number of workers over the past two decades. However, the subsequent exploitation of these models in process optimization is less clear, but obviously requires a sound understanding of how the key factors control the operation. In this article, we show how a thermokinetic model of ...

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[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 ...

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STRAIGHT GRATE INDURATION MACHINES - FE Techno

2015-12-9  Straight grate induration machine for 100% hematite. Working area – 189 m Construction of pelletizing plant no.3 with straight grate induration machine “МОК-592М”. Working area – 592 m Pallets 4.0х1.5 Reconstruction of straight grate induration machine Lurgi-278

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Iron Ore Pellets Induration Solutions - Metal 7

The grate is composed of a series of pallet cars rolling on wheels and rails on which the pellets are fed from the roller feeder/grate feeding station to form a pellet bed of a specific height and profile. The energy for the operation of the furnace and the firing of the pellets comes from two sources.

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Iron ore pelletizing - Metso Outotec

Both straight grates and grate kilns dry the pellets out in a drying section, then bring the pellets up to a temperature of about 800-900 °C in a preheat zone, then finish the induration process at roughly 1200-1350 °C. The pellets are then cooled to a suitable

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(PDF) Iron Ore Pelletizing Process: An Overview

2017-10-6  The most widely used industrial processes for pellet induration are the straight grate and the. grate-kiln. The straight grate process is composed of a single furnace where an endless line of ...

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[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 ...

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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 ...

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Schematic diagram of the straight grate induration process ...

A clear distinction between the dustiness of grate-kiln and straight-grate fired pellets is established. We conclude that grate-kiln-cooler systems provide superior pellet quality, but at the cost ...

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Iron Ore Pelletizing Process: An Overview IntechOpen

2018-7-11  The most widely used industrial processes for pellet induration are the straight grate and the grate-kiln. The straight grate process is composed of a single furnace where an endless line of pallet cars moves. A layer of indurated pellets is

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Investigation of factors affecting pellet strength in ...

2013-7-18  During induration in a straight grate machine, the green pellets pass through four different thermal treatments, namely drying, preheating, heating and cooling. The pellet bed is fired with downdraught firing leading to thermal gradients through the bed.

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Iron ore pelletizing - Metso Outotec

Both straight grates and grate kilns dry the pellets out in a drying section, then bring the pellets up to a temperature of about 800-900 °C in a preheat zone, then finish the induration process at roughly 1200-1350 °C. The pellets are then cooled to a suitable

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Process integration in an iron ore upgrading process ...

2016-10-3  Basically a straight grate induration furnace consists of three different zones, i.e. a drying zone, a firing zone and a cooling zone, and their purpose is to upgrade crude iron ore to the final product of iron ore pellet. As an initial step of the project, the mass and energy flows within a straight grate induration furnace have been analysed.

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PELLETIZING TECHNOLOGY Primetals Technologies

Straight grate pelletizing plant Covering a range of 1.5 to 9.0 million tons of pellets per year, our straight grate pelletizing plants provide an efficient way to produce any kind of pellets with the greatest operational flexibility. Circular Pelletizing Plant ...

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PELLETIZING TECHNOLOGY Primetals Technologies

Covering a range of 1.5 to 9.0 million tons of pellets per year, our straight grate pelletizing plants provide an efficient way to produce any kind of pellets with the greatest operational flexibility. Circular Pelletizing Plant The building footprint of the induration furnace is significantly smaller compared with

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

2019-8-23  14.4 Straight Grate Process of Pellet Induration . 14.5 Grate-Kiln-Cooler Process . 14.6 Comparison of Straight Grate Process vis-à-vis Grate Kiln Process. 14.7 Factors influencing the Induration Process (and Pellet Quality) 14.8 Fuel Substitution in Pellet Induration . Chapter 15: Reactions and Formation of Phases during Induration. 15.1 Preamble

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PELLETIZING TECHNOLOGY Primetals Technologies

Straight grate pelletizing plant Covering a range of 1.5 to 9.0 million tons of pellets per year, our straight grate pelletizing plants provide an efficient way to produce any kind of pellets with the greatest operational flexibility. Circular Pelletizing Plant ...

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

2019-8-23  14.4 Straight Grate Process of Pellet Induration . 14.5 Grate-Kiln-Cooler Process . 14.6 Comparison of Straight Grate Process vis-à-vis Grate Kiln Process. 14.7 Factors influencing the Induration Process (and Pellet Quality) 14.8 Fuel Substitution in Pellet Induration . Chapter 15: Reactions and Formation of Phases during Induration. 15.1 Preamble

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Process integration in an iron ore upgrading process ...

2016-10-3  Basically a straight grate induration furnace consists of three different zones, i.e. a drying zone, a firing zone and a cooling zone, and their purpose is to upgrade crude iron ore to the final product of iron ore pellet. As an initial step of the project, the mass and energy flows within a straight grate induration furnace have been analysed.

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kiln iron–ore pellet induration process - PDF Free Download

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. It is commonly carded out by a 'grate/kiln' process.

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Optimizing the operation of straight-grate iron-ore pellet ...

Mathematical models of straight-grate pellet induration processes have been developed and carefully validated by a number of workers over the past two decades. However, the subsequent exploitation of these models in process optimization is less clear, but obviously requires a sound understanding of how the key factors control the operation.

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straight gate iron ore pelletising process

Mathematical models of straight-grate pellet induration processes have been developed and carefully validated by a number of workers over the past two decades. However, the subsequent exploitation of these models in process optimization is less clear, but obviously requires a sound understanding of how the key factors control the operation.

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Effective Use of Available Heat for Maintaining a High ...

of the MK3 straight grate induration furnace. 2.3. Effect of Green Pellet Temperature on Induration Process Within the straight grate induration furnace, many param-eters will be affected by a higher green pellet temperature, which in turn will lead to improvements regarding both the specific oil consumption and the production capacity. Inter-

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On-Line Optimization of Induration of Wet Iron Ore Pellets ...

2010-12-3  A straight-grate induration furnace is used for the induration process of the wet pellets through thermal processing at elevated temperatures. As the strand of the moving grate moves from the feed end to the discharge end, the granular packed bed is subjected to increasingly hot process gas to dry and fire the pellets, and then ambient air is ...

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PELLETIZING TECHNOLOGY Primetals Technologies

PELLETIZING TECHNOLOGY - PLANTS, REVAMPS, MODERNIZATIONS, AUDITS, STUDIES, AND TEST WORKS Primetals Technologies offers the full range of pelletizing capacities, from the smaller capacities involving unique Circular Pelletizing Technology (0.5 - 2.0 mtpa) to larger capacities based on straight travelling grate technology (from 1.5 up to 9 mtpa).

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Iron Ore Pelletizatton Layering Mechanism

2018-5-26  Iron ore pelletization is a two step process consisting of pellet production in balling circuits and pellet induration in straight-grate or grate-kiln systems. Extensive applied research and plant scale testing have been directed to understanding and

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