apparatus for the direct reduction of iron in a shaft furnace using gas from

A LABORATORY STUDY OF THE REDUCTION OF IRON …

based shaft furnace process. The reduction of iron ores by hydrogen is a gas-solid reaction which occurs in two or three stages. For temperatures higher than 570°C, hematite (Fe2O3) is first transformed into magnetite (Fe3O4), then into wustite (Fe1-yO), and finally into metallic iron …

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Modeling of counter current moving bed gas-solid reactor ...

Abstract In this work, the shaft furnace reactor of the MIDREX ® process is simulated. This is a counter current gas-solid reactor, which transforms iron ore pellets into sponge iron. Simultaneous mass and energy balance along the reactor leads to a set of ordinary differential equation with two points boundary conditions. The iron ore reduction kinetics was modelated with the unreacted ...

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Midrex Process for Direct Reduction of Iron Ore - Ispat Guru

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

Oct 01, 2018· This paper addresses the modeling of the iron ore direct reduction process, a process likely to reduce CO 2 emissions from the steel industry. The shaft furnace is divided into three sections (reduction, transition, and cooling), and the model is two-dimensional (cylindrical geometry for the upper sections and conical geometry for the lower one), to correctly describe the lateral gas feed and ...

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Ironmaking 101 – From Ore to Iron with Smelting and Direct ...

Oct 17, 2017· While the blast furnace remains an important tool for ironmaking, newer technologies such as smelting and direct iron reduction are available to produce iron with minimal byproduct generation and slag-free hot metal. Smelting reduction and direct iron reduction can reduce energy input, lower greenhouse gas emissions and minimize slag byproduct generation, resulting in overall …

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Shaft Furnace | Article about Shaft Furnace by The Free ...

shaft furnace[′shaft ¦fər·nəs] (engineering) A vertical, refractory-lined cylinder in which a fixed bed (or descending column) of solids is maintained, and through which an ascending stream of hot gas is forced; for example, the pig-iron blast furnace and the phosphors-from-phosphate-rock furnace. Shaft Furnace a furnace that has an upright ...

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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 …

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Direct-Reduced Iron - an overview - ScienceDirect

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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MIDREX® — THE LEADING DRI PRODUCTION PROCESS

Midrex is an innovative ironmaking process, developed for the production of direct-reduced iron (DRI) from iron ores and primarily natural gas. 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).

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WORLD DIRECT REDUCTION STATISTICS - Midrex

WORLD DIRECT REDUCTION STATISTICS 2018 CONTENTS 2 World DRI Production 7 World DRI Production ... all using natural gas, which easily made Iran the number one gas-based producer in 2018. By the end of the year, there were ... the MIDREX® Shaft Furnace to the nearby melt-shop, thus im-proving energy efficiency.

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Midrex Direct Reduction / Ironmaking / Our Activities ...

Midrex NG™ is the configuration of the Midrex ® process using natural gas, considered as the cleanest ironmaking fuel. Through use of the patented Midrex ® Reformer, this process cost effectively makes reducing gas for the iron ore reduction reactions that take place in the Midrex ® shaft furnace.

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Improvement in Reduction Behavior of Sintered Ores in a ...

The shaft injection of reformed COG promoted the reduction and improved the permeability of the ore layer, particularly in the wall area of the blast furnace. An injection rate larger than 200 Nm 3 /t-HM was required for reformed COG for a limiting intermediate distribution ratio of injection gas lower than 20% in a large blast furnace.

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[PDF] Detailed Modeling of the Direct Reduction of Iron ...

This paper addresses the modeling of the iron ore direct reduction process, a process likely to reduce CO₂ emissions from the steel industry. The shaft furnace is divided into three sections (reduction, transition, and cooling), and the model is two-dimensional (cylindrical geometry for the upper sections and conical geometry for the lower one), to correctly describe the lateral gas feed and ...

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STATE OF THE DIRECT REDUCTION AND REDUCTION …

State of direct reduction and reduction smelting processes J. Min. Met. 38 (3 ‡ 4) B (2002) 129 Figure 3. Schematic Review of MIDREX PROCESS [2] ore or iron oxide pellet solids in the bed, Figure 3. The reducing gas (from 10-20% CO and 80-90% H2) is produced from natural gas using …

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Laboratory Simulation of the Shaft Furnace Reduction of ...

A description is presented of the results of reduction experiments using a laboratory reduction apparatus in which simulation of the gas and temperature profiles which occur in direct reduction shaft furnaces is achieved using microcomputer control. The apparatus allows continously changing reduction conditions to be impressed on lump or pellet samples to simulate the environment...

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Patents Assigned to Midrex Corporation - Justia

Abstract: Apparatus for the direct reduction of iron and production of fuel gas in which a fossil fuel is gasified to produce a hot gas which is tempered with a carbon dioxide rich gas. The mixture is reacted with carbon to upgrade it in reducing potential and is desulfurized by reaction with lime in a first shaft furnace to form a hot reducing gas.

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Hydrogen Uses in Ironmaking - Energy.gov

Iron ore is reduced to metallic iron in the MIDREX® Shaft Furnace by . Hydrogen. and CO MIDREX Reformer reducing gas composition is typically 55% H. 2. and 36%CO (ratio ~1.5) Midrex plant with SMR has operated since 1989 ~75% hydrogen. Reactions (w/ Hydrogen only) Heat Description Fe. 2. O. 3 + 3 H. 2 ↔ 2 Fe + 3 H. 2. O Endothermic Reduction ...

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Iron carbide production in shaft furnace - Midrex ...

Aug 01, 1995· During normal operation of a shaft furnace utilizing the invented process, iron carbide is produced using the Midrex direct reduction process using the normal Midrex bustle gas, but the metal oxide material is maintained within the furnace at a lower temperature and contained within the furnace for a longer residence time than currently employed.

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The Use of Hydrogen in the Iron and Steel Industry

BF - Blast Furnace SR – Smelting Reduction EAF – Electric Arc Furnace Scrap steel DRI – Direct Reduced Iron 3 THE USE OF HYDROGEN IN THE ... THE USE OF HYDROGEN IN THE IRON AND STEEL INDUSTRY Iron Ore In. Natural Gas In. Iron Out. Air. Air In (for transferring heat) Air Out.

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Midrex ® Process & HOTLINK ® Process Products || KOBE ...

A MIDREX ™ Direct Reduction Plant is composed of two main facilities : the Shaft Furnace, where iron ore is reduced, and the Reformer which generates the reforming gas to be charged into the Shaft Furnace. The MIDREX ® DR Process is able to use both lump and pellet as the raw material and recycles the used gas, therefore the process has both low energy consumption and low …

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Patents Assigned to Midrex Corporation

Abstract: A method and apparatus for the direct reduction of iron in a shaft furnace using gas from the gasification of solid fossil fuel, such as coal, in which the fuel gas is desulfurized and upgraded in the shaft furnace and direct reduction of iron oxide is carried out in the same furnace. Clean export fuel can be produced by this method along with direct reduced iron.

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Blast-Furnace Production | Article about Blast-Furnace ...

Blast-Furnace Production the production of pig iron by the reduction smelting of iron ores or pelletized iron-ore concentrates in blast furnaces. It is a branch of ferrous metallurgy. History. Pig iron was known four to six centuries before the Common Era. The blast-furnace industry took shape as a result of the development of the blooming process—the ...

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Direct Reduced Iron (DRI) Production Plant

Y3 equipment or facility Z3 natural gas D Construction Direct Reduced Iron (DRI) Production Plant NIPPON STEEL ENGINEERING CO., LTD. Basic Concept or Summary S-16 u A direct reduced iron (DRI) production plant is a shaft reduction furnace to produce DRI with large

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Shaft Furnace Direct Reduction Technology - Midrex and ...

Coke constitutes the major portion of ironmaking cost and its production causes the severe environmental concerns. So lower energy consumption, lower CO2 emission and waste recycling are driving the iron and steel industry to develop alternative, or coke-free, ironmaking process. Midrex and HYL Energiron are the leading technologies in shaft furnace direct reduction, and they account for about ...

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EIA: India's steel industry dominated by electric-based ...

There are several processes for the direct reduction of iron ore, according to the International Iron Metallics Association (IIMA): gas-based shaft furnace processes, accounting for 82% of 2016 production (72.8 million tonnes); and . coal-based rotary kiln furnaces (mainly in India), accounting for 17.5% of …

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Ironmaking 101 - Engineering News & Analysis - Latest News ...

Oct 17, 2017· While the blast furnace remains an important tool for ironmaking, newer technologies such as smelting and direct iron reduction are available to produce iron with minimal byproduct generation and slag-free hot metal. Smelting reduction and direct iron reduction can reduce energy input, lower greenhouse gas emissions and minimize slag byproduct generation, resulting in overall …

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HYL Process for Direct Reduction of Iron Ore – IspatGuru

Energiron direct reduction process (HYL process) uses a shaft reduction furnace to produce DRI. It is designed to convert iron pellet/lump ore into metallic iron by the use of reducing gases in a solid-gas moving bed shaft furnace. O2 is removed from the iron ore by chemical reactions based on H2 and CO, for the production of highly metallized DRI.

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On the Use of Pre-reduced Feed in the Blast Furnace ...

In the iron and steel industry, the partial replacement of coke with natural gas as a fuel for blast furnace ironmaking provides opportunities to blast furnace operators, in a context where natural gas is relatively cheap, to reduce greenhouse gas emissions and production costs. Direct injection of natural gas through the blast furnace tuyeres is limited by thermal constraints, seen by changes ...

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