Iron-process pellets furnace iron - YouTube

Oct 01, 2012· The configuration of iron ore pellets as packed spheres in the blast furnace allows air to flow between the pellets, decreasing the resistance to the air that flows up through the layers of ...

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Detailed Modeling of the Direct Reduction of Iron Ore in a ...

Numerous iron ore shaft furnace models were thus proposed in the literature. The first 51 studies addressed the reduction of a single pellet by H2, CO, or H2-CO mixtures [5-10]. The 52 subsequent ones developed models that simulate the reduction zone of the shaft furnace in 1D [11-53 12]. With the aim to correctly describe the lateral gas feed ...

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11.23 Taconite Ore Processing - US EPA

Y Vertical shaft furnace feed 3-03-023-69 Z Hearth layer feed to furnace 3-03-023-48 ... Pelletization is the third major step in taconite ore processing. Iron ore concentrates must be ... Acid pellets are produced from iron ore and a binder only, and flux pellets are produced by adding between 1 and 10 percent limestone to the ore and binder ...

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The World Leader in Ironmaking Solutions | Primetals ...

Midrex is a gas-based shaft furnace process that converts iron oxides – in the form of pellets or lump ore – into direct reduced iron (DRI). The Midrex technology is highly adaptive to our customers' needs, which is reflected in a broad variety of configurations. The performance of Midrex plants typically exceeds nominal capacity ratings.

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Cost Effectiveness Analysis of HYL and Midrex DRI ...

Midrex is a process by which iron ore pellets, lump iron ore or a combination of both is reduced in a vertical shaft/reduction furnace. The reduced material then flows through catalyst tubes where it is chemically converted into a gas containing hydrogen and carbon monoxide. As the iron ore moves down the furnace

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Pellets for Direct Reduction - 911metallurgist.com

LKAB have concentrated on developing and marketing grades of pellets for the Midrex-Purofer-Hyl process group, i.e. such D.R. processes which are carried out in a shaft furnace or a static bed using reformed natural gas as a reducing agent. The paper deals with properties and quality demands of iron ore pellets for such processes.

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–– Iron Ore Pelletization Iron Ore ...

Iron Ore Feed Material: Blend of Orissa Blue Dust Hematite Product Specifications: Iron Ore Pellets for Blast Furnace and DRI Feed Straight Grate System Reference Plant JSPL Barbil Line …

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Iron Ore Pellet - an overview | ScienceDirect Topics

A.E. Morris, in Encyclopedia of Materials: Science and Technology, 2001. 1.1 Iron Oxide. Available sources of iron oxide include high-grade lump ore, beneficiated iron ore fines, iron ore pellets, and agglomerates from dusts produced by the BF, basic oxygen furnace, and the EAF.Most DRI is produced in shaft furnaces, which require a uniform-sized coarse feed.

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Pelletizing Shaft Kiln | Pelletizing Shaft Kiln Manufacturer

Overview; The production of pellet is like the sinter production, it supply beneficiated burden for blast furnace, the production process will produce the pellets from iron ore concentrate or powder materials.The prepared raw materials are made into certain size pellets after batching and blending in certain pro portion, then adopt drying and roasting method to produce a series of physical ...

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Midrex Process for Direct Reduction of Iron Ore – IspatGuru

Apr 09, 2017· Midrex Process for Direct Reduction of Iron Ore. Midrex is an ironmaking process, developed for the production of direct reduced iron (DRI). It is a gas-based shaft furnace process is a solid state reduction process which reduces iron ore pellets or lump ore into DRI without their melting using reducing gas generally formed from natural gas.

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A Shaft-Electric Furnace for Melting and Smelting

When prereduced iron pellets are melted in this unit, the operating conditions in the shaft furnace must be considerably different than when an oxide ore is being smelted. Because the pellets are almost completely reduced, only a minor amount of reduction remains to be completed in the arc furnace and, therefore, only a very small quantity of ...

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Shaft furnace | metallurgy | Britannica.com

In iron processing: Pelletizing …of firing equipment was the shaft furnace. This was followed by the grate-kiln and the traveling grate, which together account for more than 90 percent of world pellet output. In shaft furnaces the charge moves down by gravity and is heated by a counterflow of hot combustion gases, but the… Read More

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Midrex© Process | Industrial Efficiency Technology & Measures

Midrex is direct reduction process using a shaft-reactor and is developed by Midrex/Kobe Steel. Iron ore pellets, lump iron ore or a combination of pellets and ore are reduced in a vertical shaft or reduction furnace to metallic iron by means of a reduction gas. The reducing gas is produced from a mixture of natural gas and recycled gas from the reduction furnace.

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C 617 ACTA - jultika.oulu.fi

A blast furnace is the dominant process for making iron in the world. Iron ore pellets are commonly used as iron burden materials in a blast furnace, in which iron oxides are reduced to metallic molten iron. While descending, the charge faces various stresses, which affect the gas flows in the shaft and the energy efficiency of the process.

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Iron Ore Pellets: North America, BF and DR Grade, Supply ...

shaft furnaces: pellets, lump ore key physical properties are size consist, mechanical strength: economic importance (a) yield of pellet, lump ore converted to DRI (b) performance of the shaft reduction furnace unlike blast furnace, pellets (and lump ore) are only solid materials and so determine

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Fundamental Studies Related to Gaseous Reduction of …

production of DRI is carried out in the moving bed shaft furnaces using iron ore pellets as the raw material. The most common processes are the MIDREX and the ENERGIRON (previously HYL) technologies [1, 2]. The product of the DR pr ocess is a highly porous solid iron (sponge iron or DRI). The metallization

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Moving behavior of pellets in a pellet shaft furnace ...

Abstract. The downward moving behavior of pellets in a 8 m 2 pellet shaft furnace with an internal vertical air channel and a drying bed was studied by means of a visualized model (1:15) and a top model (1:1). The visualized model experiment shows that the downward movement of pellets can be regarded as plug flow approximately inside the furnace except for the lower region of cooling zone due ...

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shaft furnace - Spanish translation – Linguee

A blast furnace is a closed system into which iron bearing materials (iron ore lump, sinter and/or pellets), additives (slag formers such as limestone), and …

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DRI production | International Iron Metallics Association

Direct reduction of iron is the removal of oxygen from iron ore or other iron bearing materials in the solid state, i.e. without melting, as in the blast furnace. The reducing agents are carbon monoxide and hydrogen, coming from reformed natural gas, syngas or coal. Iron ore is used mostly in pellet …

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Detailed Modeling of the Direct Reduction of Iron Ore in a ...

carbon dioxide emissions. As such, numerous iron ore shaft furnace models have been proposed in the literature. Initial studies addressed the reduction of a single pellet by H2, CO, or H2-CO mixtures [4–9]. Subsequent studies developed models that simulated the reduction zone of the shaft furnace in one dimension [10,11].

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Pelletizing - Wikipedia

Iron ore pellets are spheres of typically 6–16 mm (0.24–0.63 in) to be used as raw material for blast furnaces.They typically contain 64%-72% Fe and various additional material adjusting the chemical composition and the metallurgic properties of the pellets. Typically limestone, dolomite and olivine is added and Bentonite is used as binder.. The process of pelletizing combines mixing of ...

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Iron ore pelletizing Grate-KilnTM system

Iron ore pelletizing 3 Process flexibility There are two main processes for producing iron ore pellets: The Grate-Kiln system and the straight grate system. 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

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Blast furnace | metallurgy | Britannica.com

Blast furnace, a vertical shaft furnace that produces liquid metals by the reaction of a flow of air introduced under pressure into the bottom of the furnace with a mixture of metallic ore, coke, and flux fed into the top. Blast furnaces are used to produce pig iron from iron ore for subsequent

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Direct Reduction Process (MIDREX) | Middle East Steel Industry

Dec 01, 2008· The Midrex ™ Direct Reduction process is based upon a low pressure, moving bed shaft furnace where the reducing gas moves counter-current to the lump iron oxide ore or iron oxide pellet solids in the bed. The reducing gas (from 10-20% CO and 80-90% H2) isproduced fromnatural gasusing Midrex's CO2 reforming process and their proprietary…

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Amenability of Reduced Iron Ore Pellets to Mechanical ...

The disintegration behavior and mechanism of iron ore pellet in simulated shaft furnace conditions were investigated in details. Effects of temperature, reducing gas and gangue compositions were ...

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Iron Ore Pelletizing Process: An Overview | IntechOpen

The iron ore production has significantly expanded in recent years, owing to increasing steel demands in developing countries. However, the content of iron in ore deposits has deteriorated and low-grade iron ore has been processed. The fines resulting from the concentration process must be agglomerated for use in iron and steelmaking. This chapter shows the status of the pelletizing process ...

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Shaft Furnace - an overview | ScienceDirect Topics

The MIDREX® shaft furnace is designed to operate with a combination of pellets and lump ores virtually in any proportion. This allows the plant operator to maximize productivity at the lowest cost. MIDREX® plants are reported to have processed iron oxide pellets and lump ores from over 50 …

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Direct Reduced Iron and its Production Processes – IspatGuru

Mar 16, 2013· Major DRI production processes are either gas based or coal based. Feed material in a DRI process is either iron ore sized to 10 to 30mm or iron ore pellets produced in an iron ore pellet plant. In the gas based plant the reactor, the reduction reaction takes place is a shaft furnace.

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US3975182A - Pellets useful in shaft furnace direct ...

Iron ore or concentrates containing about 0.5 to about 3.0% silica, 0.5 to 1.0% bentonite and 96.5 to 99.0% iron oxide together with 7.0 to 12.0% moisture is pelletized, the pellets are surface-coated with about 1 to about 4.5% limestone and fired at a temperature of about 2100° to about 2400°F., the formed pellets being suitable for direct reduction temperatures above 1400°F in a shaft ...

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Process through Multiscale Process Modeling - mdpi.com

3. Shaft Furnace Model 3.1. Previous Works The shaft furnace (Figure 2) is the core of the DR process. Iron ore pellets are charged at the top, descend due to gravity, and encounter an upward counter-flow of gas. The reducing gas (CO and H 2, plus CH 4, CO 2, and H 2O, at about 950 °C) is injected peripherally at mid-height and exits at the top.

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