Straight Grate Induration Furnace

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

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

straight grate induration furnace. Previous studies show that this can lead to both higher production capacity of the induration furnace and also reduced specific oil consumption. The aim of this study is to apply the process integration concept to analyze how to maintain a high green pellet temperature by using the available heat more effectively. The heat is today used for the indoor climate ...

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Energy analysis of pelletising in a straight grate ...

Energy analysis of pelletising in a straight grate ...

Straight Grate Induration Furnace Nordgren ISSN: ISBN Luleå University of Technology 2010 ISSN: ISBN XXXX Se i listan och fyll i siffror där kryssen är. LICENTIATE THESIS Energy analysis of pelletising in a straight grate induration furnace Nordgren Division of Energy Engineering Department of Applied Physics and Mechanical ...

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Process integration in an iron ore upgrading process ...

Process integration in an iron ore upgrading process ...

Basically a straight grate induration furnace consists of three different zones, 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. The outcome of the analysis will in the future ...

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

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

01/12/2008 · Schematic diagram of a straight grate induration furnace. Offgases of the second cooling stage are used in the drying zone. This zone does not have any burner. In PH, F1 and F2 zones, offgases of the first cooling zone are heated under burner hoods to raise their temperatures up to about 800, 1200 and 1300 °C, respectively. Since the AF zone has no burner, the offgases coming from C1 .

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 Pelletization Solutions

Pelletization Solutions

GrateKiln system Straight grate systems Consistent pellet quality, lowest operating costs Maximizing output, minimizing capital cost The GrateKiln induration machine is composed of three separate pieces of equipment; the Traveling Grate, the Rotary Kiln, and the Annular Cooler. Independent variable speed control of drying/preheating, induration, and cooling allows process flexibility to ...

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

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

01/12/2008 · Schematic diagram of a straight grate induration furnace. Offgases of the second cooling stage are used in the drying zone. This zone does not have any burner. In PH, F1 and F2 zones, offgases of the first cooling zone are heated under burner hoods to raise their temperatures up to about 800, 1200 and 1300 °C, respectively. Since the AF zone has no burner, the offgases coming from C1 zone ...

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Iron Ore Pelletizing Process: An Overview | IntechOpen

Iron Ore Pelletizing Process: An Overview | IntechOpen

11/07/2018 · The most widely used industrial processes for pellet induration are the straight grate and the gratekiln. The straight grate process is composed of a single furnace where an endless line of pallet cars moves. A layer of indurated pellets is arranged at the bottom of each car to protect it against the heat. The green pellets are then charged on top of the hearth of indurated pellets. A ...

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Effect of Heating Rates on the Sintering of Oxidized ...

Effect of Heating Rates on the Sintering of Oxidized ...

Induration is carried out in a straight grate furnace or in straight grate furnace followed by a rotary Kiln furnace. The hot gases are allowed to flow upward as well as downward through the packed bed and in countercurrent direction across the furnace for efficient heat transfer. During induration, magnetite pellet undergoes drying (273 – 523 K), oxidation (573 – 1073 K) at lower ...

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Iron ore pelletizing

Iron ore pelletizing

Both straight grates and grate kilns dry the pellets out in a drying section, then bring the pellets up to a temperature of about 800900 °C in a preheat zone, then finish the induration process at roughly °C. The pellets are then cooled to a suitable temperature for transporting to a load out facility. Both processes recycle the heat from the pellet back through the process to aid ...

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GrateKiln System for iron ore pelletizing

GrateKiln System for iron ore pelletizing

In the straight grate system, a continuous parade of grate cars moves at the same speed though the drying, induration and cooling zones. Any change in one section effects the residence time in another. Pelletization is comprised of two main stages: (1) agglomeration and (2) induration. During agglomeration, finely ground particulates (usually 80% passing 44 micron) of ore concentrate (with a ...

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INVESTIGATING THE OXIDATION PHENOMENA OF MAGNETITE .

INVESTIGATING THE OXIDATION PHENOMENA OF MAGNETITE .

grate furnace or in straight grate furnace followed by a rotary kiln furnace. The hot gases are allowed to flow upward as well as downward through the packed bed of pellets and in countercurrent direction across the furnace for efficient heat transfer. During induration, magnetite pellet undergoes drying (RT – o250 o C), oxidation (300 – 750 C) and sintering (> 1000 o C) [1]. As the ...

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Potential Impacts of the Federal Regional Haze and BART ...

Potential Impacts of the Federal Regional Haze and BART ...

Figure 51 General Diagram of a Straight Grate Induration Furnace..... 35 Figure 52 General Diagram of a Grate/Kiln Induration Furnace ..... 35 Figure 71 Equilibrium NOx Concentrations at Various Temperatures for a Typical Induration

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AIST

AIST

Keywords: Induration Furnace, Computational Fluid Dynamics, Iron Ore, Straight Grate, Pelletizing, Green House Emissions Association for Iron Steel Technology 186 Thorn Hill Road • Warrendale, PA USA

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Mercury Chemistry and Möss Spectroscopy of Iron ...

Mercury Chemistry and Möss Spectroscopy of Iron ...

Diagram of a straightgrate taconite induration furnace. Fresh pellets are carried on a grate through a furnace and cooled by fresh air passed through the pellet bed. The air used for cooling the hot pellets and the gases generated in the firing zone are used for drying and heating the pellets. 5 Möss Spectroscopy Möss spectroscopy is a sensitive technique for measuring the atomic ...

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STRAIGHT GRATE INDURATION MACHINES

STRAIGHT GRATE INDURATION MACHINES

Straight grate induration machine for hematite. Working area – 189 m Construction of pelletizing plant with straight grate induration machine "МОК592М". Working area – 592 m Pallets х Reconstruction of straight grate induration machine Lurgi278 "B" Working area – 278 m Balling Disk "ОЧ7500"

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Major Mines Projects | Malmberget Mine

Major Mines Projects | Malmberget Mine

05/07/2021 · The pelletising plant consists of a number of different operation units, where the main unit is the straight grate induration furnace. Both plants are constructed more or less in the same way. The main difference between the two pelletising induration furnaces is that the newest induration furnace has an additional exhaust gas fan connected to the hot part of the furnace, and there are also a ...

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Studying the Sintering Behavior of Oxidized Magnetite ...

Studying the Sintering Behavior of Oxidized Magnetite ...

Induration is carried out in a straight grate furnace or in straight grate furnace followed by a rotary Kiln hot gases are allowed to flow upward as well as downward through the packed bed or in countercurrent direction across the kiln for efficient heat transfer. During induration, magnetite pellet undergoes drying (100 – 250 K), oxidation (300 – 1100 K) at lower temperatures ...

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(PDF) CFD model of a straightgrate furnace for iron oxide ...

(PDF) CFD model of a straightgrate furnace for iron oxide ...

PDF | A threedimensional CFD model of a straight grate furnace for indurating ironoxide pellets was developed for exploring conditions of furnace... | Find, read and cite all the research you ...

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AIST

AIST

Keywords: Induration Furnace, Computational Fluid Dynamics, Iron Ore, Straight Grate, Pelletizing, Green House Emissions Association for Iron Steel Technology 186 Thorn Hill Road • .

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CFD model of a straightgrate furnace for iron oxide ...

CFD model of a straightgrate furnace for iron oxide ...

01/11/2014 · A threedimensional CFD model of a straight grate furnace for indurating ironoxide 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.

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continuous furnace for induration

continuous furnace for induration

STRAIGHT GRATE INDURATION MACHINES Uralmash. blast furnace equipment, continuous casting machines, rolling equipment, pressforging equipment, rolling mill rolls ... first domestic straight grate induration machine OK2108 was put in service at ... designs of furnaces, headers and gas pipelines of the machine, securing the specified ...

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[PDF] Dynamic simulation of pellet induration process in ...

[PDF] Dynamic simulation of pellet induration process in ...

Abstract A mathematical model of pellet induration process in the straightgrate 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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Effective Use of Available Heat for Maintaining a High ...

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

Within the straight grate induration furnace, many parameters 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. Internal studies are showing that the durability of the green pellets is believed to be dependent on its temperature, a higher temperature of the material stream ...

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