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 gasbased 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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Jan 01 2010The modern large blast furnace can reach a productivity of 1000013000 THMday with an inner volume of 45005500 m 3 However the productivity from this definition depends very much on the size of the furnace and cannot be used to measure the furnace
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2development of a double layer lining for dri production in rotary kilns energy savings and wear resistance shaft furnaces midrex
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It is possible to store huge amounts of data in the memory and operational analysis makes the formation of operational tactics possible Cokc QQ QQQ OIargiog systcm Blast furnace Instrumentation Powdered Coal Refractory Wear Detector Burden This paP7r reviews the progress of blast furnace
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Furnace containing alloy tubes filled with catalyst The gas is heated and reformed as it passes through the tubes The newly reformed gas containing 9092 percent H2 and CO is then fed hot directly to the shaft furnace as reducing gas Heat Recovery The thermal efficiency of the MIDREX Reformer is greatly enhanced by the heat recovery system
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Mar 16 2013In the gas based plant the reactor the reduction reaction takes place is a shaft furnace The shaft furnace works on counter current principle where the iron ore feed material moves downward in the furnace by gravity and gets reduced by the up flowing reducing gases The pressure and temperature in shaft furnace in HYL process is 56 bars and
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The Corex export gas and recirculated top gas from the Midrex Shaft Furnace are mixed and pressed followed by CO 2 removal The gas is then heated to the required process temperature after which it is then used for the direct reduction of iron ore in the Midrex Shaft Furnace
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Aug 24 2015It is operated with mainly indigenous iron ores prising SISHEN lump ore 80 100 CVRD pellets 0 20 and indigenous coal from the VAN DIJKSDRIFT and GROOTELUK coal districts COREX gas from the plant is used for the production of DRI in the adjacent DR plant using a MIDREX shaft furnace
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Midrex has the ONLY mercial scale shaft furnace technology that is using syngas derived from coal to produce DRI This plant has been successfully operating since 1999 H2CO ratio 04 which is the lowest of all DR Plants Consistently uses 70 lump ore Sishen in the feed mix
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May 03 2018A shaft furnace for producing metallic direct reduced iron DRI from ironcontaining pellets or lumps and reducing gas disposed therein including a circumferential outer wall defining a top interior reducing zone a middle interior transition zone and a bottom interior cooling zone wherein the ironcontaining pellets or lumps travel downwards through the top interior reducing zone the
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Furnace basic oxygen route 2 Among DR processes shaft furnaces represent over 82 of the worlds DR iron production with the two main processes being MIDREX 65 as shown in Figure1 and HYLENERGIRON 17 3 In a DR shaft furnace a charge of pelletized or lump iron ore is loaded into the top of the furnace
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Dec 15 2014Midrex shaft process 1 MIDREX PROCESS The Midrex Processusing The midrex Shaft Furnace to converts iron oxide in pellet or lump form into highly metallized direct reduced iron 2 Cont Simple ProcessMost naturally occuring iron ore exist as hematite Fe2O3
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Of the MIDREX plants One mercial example is the use of the offgas from the COREX process Fig 3shows the flow of a process bining the COREX process and MIDREX process The COREX is a process in which ore lumps andor pellets are reduced in a shaft furnace until their metallization reaches approximately 90 and the remainder
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Gasbased shaft furnace processes Midrex and Energiron being the main ones but there are several others including Finmet which uses iron ore fines as feedstock accounting for 82 of 2016 production 728 million tonnes coal based rotary kiln furnaces mainly in India
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Oct 17 2017While 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 slagfree hot metal Smelting reduction and direct iron reduction can reduce energy input lower greenhouse gas emissions and minimize slag byproduct generation resulting in overall cost
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The MIDREX Process performs the iron ore reduction activities inside a tall vertical reactor called the MIDREX Shaft Furnace This is acplished as the continuously fed iron oxide which is similar in size and shape to marbles flows downward through the Shaft Furnace by gravity countercurrent to the hot
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Midrex is an innovative ironmaking process developed for the production of directreduced iron DRI from iron ores and primarily natural gas Midrex is a gasbased shaft furnace process that converts iron oxides in the form of pellets or lump ore into direct reduced iron DRI
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Midrex NG process First plant built in 1969 Over 70 units constructed worldwide Over a billion tons of iron produced by the MIDREX process Iron ore is reduced to metallic iron in the MIDREX Shaft Furnace by Hydrogen and CO MIDREX Reformer reducing gas position is typically 55 H 2 and 36CO ratio 15 Midrex plant with SMR
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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 cokefree ironmaking process Midrex and HYL Energiron are the leading technologies in shaft furnace direct reduction and they account for about
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Shaft furnace temperature endothermic ACT uses carbon monoxide CO to increase DRI carbon exothermic A COrich gas is mixed with natural gas and injected into the MIDREX Shaft Furnace Benefits Carbon content adjustable from 154 Increase in carbon achieved while maintaining DRI
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A MIDREX Direct Reduction Plant is posed 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 environmental
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Shaft furnace lining midrex Kind Of Refractory Usefull For Midrex Furnance shaft furnace lining midrex the furnace refractory lining is coated with slag The AISI process uses a Hyl or Midrex type shaft furnace for prereduction
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STEULERKCH is the specialist when it es to innovative refractory lining concepts in the iron and steel industry We have customised solutions on hand for all types of units that operate using the Midrex EnergironHYL and Corex direct reduction process Whether they are being used in air and process gas heaters in reformers or in the heart of the plant the shaft furnace
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MIDREX shaft furnaces with 50 m 55 m and 65 m shaft diameters having annual production capacities of 800000 tons 1 million tons and 16 million tons of DRI respectively constitutes different development stages Later with the TECHNICAL DEVELOPMENTS IN THE MIDDREX PROCESS
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Refractory for midrex shaft furnace lining midrex trituradora de la planta mvil feed DRI from the Midrex Shaft Furnace into storage bins located directly above the tory Lining 8 grater furnace diameter Midrex II 3 module Midrex series 400 startup production in 1979 original capacity 1275000 tonyear for 3 module Read more
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The MIDREX process is a shafttype direct reduction process where iron ore pellets lump iron ore or a bination are reduced in a Vertical Shaft reduction furnace to metallic iron by means of a reduction gas see Figure 1139 9
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Shaft Furnace Standard Process Flow of MIDREX shaft furnace DRI is fed to EAF to produce steel As the iron oxide descends through the furnace the iron oxide is heated and reduced Reason why MIDREX is less CO2 Emission As Fuel Table shows the CO2 emission rates for busting methane versus two types of coal
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Aug 21 2015MIDREX technology which is the The focus of this study is to simulate the furnace of the MIDREX technology Modeling and Simulation of the MIDREX Shaft Furnace Reduction Transition and Cooling Zones SpringerLink
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The experience of operating the shaft furnace with a diameter of 65m has led to the construction of a larger shaft furnace at Saudi Iron Steel Company in Hadeed Saudi Arabia in 2007 This shaft furnace has a diameter of 715m and an increased production capacity of 18 million tonnesyear Fig 7 Another shaft furnace SUPER MEGAMOD
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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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Of a Midrex Shaft Furnace The refractory material in this area especially the gas inlet nozzles have to face extreme stresses The lining has to withstand extensive mechanical abrasion thermal shocks and of course the enormous chemical attack by the reduction gas STEULERKCH has developed special highgrade refractory qualities
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Apr 09 2017Midrex Process for Direct Reduction of Iron Ore Midrex is an ironmaking process developed for the production of direct reduced iron DRI It is a gasbased 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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