reduce magnetite to sponge iron in rotary hearth furnace

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reduce magnetite to sponge iron in rotary hearth furnace

reduce magnetite to sponge iron in rotary hearth furnace

reduce magnetite to sponge iron in rotary hearth furnace

A Thesis Submitted for Partial Fulfillment of the Degree

2012-5-29  Sponge iron, also called Direct-reduced iron (DRI), is formed, when naturally available Iron Ore which is an oxidised form of Iron (magnetite (Fe 3 O 4) or hematite (Fe 2 O 3)) is reduced to its metallic form. This reduction process occurs below the melting temperature of both metallic iron and its oxidised form. Though this

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Ironmaking in Rotary Hearth Furnace IspatGuru

2017-5-17  Ironmaking in the rotary hearth furnace (RHF) is a direct reduction process which utilizes non-coking coal for the reduction of iron ore. The RHF is the process reactor which consists of a flat, refractory hearth rotating inside a stationary, circular tunnel kiln. Inside the RHF, direct reduction of iron ore or iron-bearing waste materials

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(PDF) Mathematical model for sponge iron production in

Project: 3D mathematical model for simulating gas dynamics, heat and mass transfer in the freeboard of a pilot-scale Rotary Hearth Furnace (RHF) in conjunction with the an independent solid

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Effect of Amount of Carbon on the Reduction Efficiency of

2016-4-8  The effect of carbon-to-hematite molar ratio has been studied on the reduction efficiency of iron ore-coal composite pellet reduced at 1523 K (1250 °C) for 20 minutes in a laboratory scale multi-layer bed rotary hearth furnace (RHF). Reduced pellets have been characterized through weight loss measurement, estimation of porosity, shrinkage, qualitative and quantitative phase analysis by XRD

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Reduction of Iron-Oxide-Carbon Composites: Part II. Rates

Iron ore-biomass pellets have the similar characteristics as iron ore-coal pellets, so they both can be reduced in a shaft furnace [93], a rotary hearth furnace [94], or a rotary kiln [95], etc.

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Mathematical Model to Estimate the Rate Parameters and

2014-10-15  Reduction of iron ore–coal composite pellets at a rotary hearth furnace (RHF) could be an energy efficient process under optimized design and operating conditions. The present study aims to analyze such process through process models for optimization of thermal efficiency. In the present article, a mathematical model has been described to calculate the rate parameters, evolution of various

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Sintering Fundamentals of Magnetite Alone and Blended

to BHP Billiton iron ores (e.g., MACTM Fines: Fe 61.8%, SiO 2 3.0%, Al 2 O 3 1.9, CaO 0.03%, MgO 0.06%), the concentrates are high in CaO and MgO; and low in Al 2 O 3 /SiO 2 ratio. Tab le 2gives the mineralogy for the above magnetite concentrates. Magnetite is the main iron oxide and hematite is also present. Ores E1 and E2 contain siderite. The

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(PDF) COMPARISON OF DIFFERENT COAL BASED DIRECT

iron ore in a rotary hearth furnace and th e subsequent smelting/melting of the highly metallized sponge iron pellets into liquid ho t metal in a submerged arc furnace (Fig. 11).

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Leading experts in Multiple Hearth Furnace design

2014-12-1  2014-12-1  A furnace consisting of several round, stacked hearths. The hearths are basically floors within a large cylinder. The hearths alternate between in-hearths and out-hearths. In hearths have a large hole in the center, for material to pass through to the hearth below. Out-hearths, have holes around the perimeter of the hearth for material to pass through to the hearth below.

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Direct-Reduced Iron an overview ScienceDirect Topics

In the first step, iron ore is reduced to sponge iron in a shaft furnace by means of reducing gas. In the second step, the reduced iron is melted in the melter–gasifier vessel. Reducing gas (CO and H 2) used in the reduction shaft is supplied by gasification of coal by means of oxygen, forming a fixed or fluidized bed in the melter–gasifier

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The history and development of the SciELO

2012-5-29  The engineering study resulted in a rotary kiln—electric furnace (RKEF) flowsheet for the iron plant. The purpose of the kilns is to reduce the magnetite ore ‘as much as possible’ by utilizing a cheap form of energy such as pulverized coal, fired through a continuous burner at

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OBTAINMENT OF SPONGE IRON BY REDUCTION OF A

2016-5-30  yielding sponge iron that can be re-used to the electric furnace as metallic charge for steelmaking to obtain a product with a lower residual content and improved properties [4,6]. Industrially, iron ore is placed with coal and lime in rotary furnaces at a rate that is controlled by the rotation speed. The interior of the furnace is

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STUDY OF REDUCTION BEHAVIOUR OF IRON ORE

2014-8-21  c> Rotary hearth process. This process iron oxide fines, coal fines and binder are mixed together and palletized . As the hearth rotates around the circular furnace, the pellets are heated to 1250oC-1350oC and the iron oxide is reduced to metallic iron. Residence time in hearth

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Reduction of Iron-Oxide-Carbon Composites: Part II. Rates

Iron ore-biomass pellets have the similar characteristics as iron ore-coal pellets, so they both can be reduced in a shaft furnace [93], a rotary hearth furnace [94], or a rotary kiln [95], etc.

get price

A Thesis Submitted for Partial Fulfillment of the Degree

2012-5-29  Sponge iron, also called Direct-reduced iron (DRI), is formed, when naturally available Iron Ore which is an oxidised form of Iron (magnetite (Fe 3 O 4) or hematite (Fe 2 O 3)) is reduced to its metallic form. This reduction process occurs below the melting temperature of both metallic iron and its oxidised form. Though this

get price

Production of sponge iron powder by reduction of

2020-7-27  metallic iron (Fe) and three types of iron oxides: wustite (FeO), hematite (α-Fe 2 O 3) and magnetite (Fe 3 O 4). It also contains traces of non-ferrous metals, alkaline compounds and oils from the rolling process. A study is made of the reduction of mill scale to sponge iron using coke at different temperatures and times. The reduced samples are

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metallized sludge briquette making process and the benefit

Metallized sludge briquette is used to make iron in rotary hearth furnace, after it’s fed in the furnace, it follows a process below. The rotary hearth furnace is heated by the gas to temperature up to 1,300 Celsius. In this heating process, the iron oxide, zinc oxide

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New Trends in the Application of Carbon-Bearing

2018-12-1  iron-making processes are for example rotary hearth furnace (RHF), shaft furnace or fluidized bed. They differ in nature of iron ore used, their physic al and chemical properties, reducing agent, type of fuel used and even sometime the process concept. Additionally, the produced sponge iron

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Leading experts in Multiple Hearth Furnace design

2014-12-1  A furnace consisting of several round, stacked hearths. The hearths are basically floors within a large cylinder. The hearths alternate between in-hearths and out-hearths. In hearths have a large hole in the center, for material to pass through to the hearth below. Out-hearths, have holes around the perimeter of the hearth for material to pass through to the hearth below.

get price

A Thesis Submitted for Partial Fulfillment of the Degree

2012-5-29  Sponge iron, also called Direct-reduced iron (DRI), is formed, when naturally available Iron Ore which is an oxidised form of Iron (magnetite (Fe 3 O 4) or hematite (Fe 2 O 3)) is reduced to its metallic form. This reduction process occurs below the melting temperature of both metallic iron and its oxidised form. Though this

get price

The history and development of the SciELO

2012-5-29  The engineering study resulted in a rotary kiln—electric furnace (RKEF) flowsheet for the iron plant. The purpose of the kilns is to reduce the magnetite ore ‘as much as possible’ by utilizing a cheap form of energy such as pulverized coal, fired through a continuous burner at

get price

Direct-Reduced Iron an overview ScienceDirect Topics

In the first step, iron ore is reduced to sponge iron in a shaft furnace by means of reducing gas. In the second step, the reduced iron is melted in the melter–gasifier vessel. Reducing gas (CO and H 2) used in the reduction shaft is supplied by gasification of coal by means of oxygen, forming a fixed or fluidized bed in the melter–gasifier

get price

Production of sponge iron powder by reduction of

2020-7-27  metallic iron (Fe) and three types of iron oxides: wustite (FeO), hematite (α-Fe 2 O 3) and magnetite (Fe 3 O 4). It also contains traces of non-ferrous metals, alkaline compounds and oils from the rolling process. A study is made of the reduction of mill scale to sponge iron using coke at different temperatures and times. The reduced samples are

get price

The Effect of Reduction Time and Size Distribution of

2016-4-29  A rotary kiln is a tool used to reduce low-grade iron ore and produce sponge iron with a high metallization. This process is in accordance with the Indonesian government policies that regulate the minimum value of percentage of sponge iron metallization for export, i.e. 85%.

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Direct Reduced Iron Industrial Efficiency Technology

2017-9-13  Direct Reduced Iron (DRI), also known as Sponge Iron, offers an alternative steel production route to BF-BOF and Scrap-EAF routes. In DRI, iron ore is reduced in its solid state unlike BF process where a liquid metal is formed during reduction. DRI can then be transformed to steel in electric arc furnaces. DRI production is common in Middle East, South America, India and Mexico.

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IOP Conference Series: Materials Science and

2019-7-6  scales of production. For the large-scale smelting, the shaft furnace or rotary kiln can be used instead of the rotary hearth furnace to product the direct reduced iron[2], and in the follow-up process the large rectangle submerged arc furnace can be uesed instead of conventional circular arc furnace to product the titanium slag and the liquid

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THE EFFECT OF REDUCTION TIME AND SIZE

low-grade iron ore has the potential to be reduced by using a rotary kiln. A rotary kiln is a tool used to reduce low-grade iron ore and produce sponge iron with a high metallization. This process is in accordance with the Indonesian government policies that regulate the minimum value of percentage of sponge iron metallization for export, i.e. 85%.

get price

Rotary hearth furnace The BOC Group, Inc.

A rotary hearth furnace having a heating zone and a reducing zone comprising: a cylindrical chamber into which pellets comprising metal oxide and carbon are introduced; a belt for transporting said pellets radially around the axis of said chamber in a first direction; a plurality of oxy-fuel burners capable of introducing a mixture of fuel and

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Leading experts in Multiple Hearth Furnace design

2014-12-1  A furnace consisting of several round, stacked hearths. The hearths are basically floors within a large cylinder. The hearths alternate between in-hearths and out-hearths. In hearths have a large hole in the center, for material to pass through to the hearth below. Out-hearths, have holes around the perimeter of the hearth for material to pass through to the hearth below.

get price