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a vertical shaft furnace for the direct reduction of iron oxides to obtain directly reduced iron (dri) comprising these devices: (a) a gravity feed having in its upper part a plurality of...


Direct Reduced Iron and its Production Processes. ... The shaft furnace works on the 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 heart of the gas based process is the shaft furnace. It is a cylindrical, refractory-lined vessel and ...


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MIDREX Processes -

raw material and discharging of DRI. The reaction occurring in the shaft furnace is the well-known reduction reaction of iron, described as follows: Fe 2O 3 + 3CO → 2Fe + 3CO 2 Fe 2O 3 + 3H 2 → 2Fe + 3H 2O The exhaust gas (top gas) emitted from the top of the shaft furnace is cleaned and cooled by a wet


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STEEL-DRI – GMB-Group

COMPANY LOCATION AREA UNIT YEAR; Nu-Iron: Trinidad Reactor-reformer Midrex: 2019: General maintenance, shaft furnace, reformer heat recovery, 30 ton ref. inst.


DRI PRODUCTS Cold DRI (CDRI) Most MIDREX®Plants built to-date produce CDRI. After reduction, the DRI is cooled in the lower part of the MIDREX® Shaft Furnace to about 50° C. This material is typically used in a nearby EAF and must be kept dry to prevent reoxidation and loss of metalization. CDRI is ideal for continuous charging to the EAF.


An extensive range of refractories ideal for use downstream of the blast furnace is also available, including: Saint-Gobain Performance Ceramics & Refractories is also focused on developing materials for the evolving needs of DRI (Direct Reduced Iron) processes. Refractory requirements increase in line with H2 usage.


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) …


The coal-based processes can be grouped in to four categories according to their. reduction reactors: rotary kiln, shaft furnace, fluidized bed and rotary hearth furnace. Fig. 3 …


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Refractory Chun hwa metal

Allied supports a multitude of copper metal production processes with an extensive refractory selection. We specialize in copper shaft furnace systems and induction furnaces melting copper and copper alloys, providing products that can improve …


A shaft furnace for producing metallic direct reduced iron (DRI) from iron-containing 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 iron-containing pellets or lumps travel downwards through the top interior reducing …


ISSN 1982-9345 MYTHS AND REALITIES OF CHARGING DRI/HBI IN ELECTRIC ARC FURNACES* 1 Sara Hornby 2 Jorge Madias 3 Francisco Torre Abstract After almost half a century of experience in using DRI/HBI in electric arc furnaces (EAFs), and taking into account the decrease of natural gas cost in the USA, it is interesting to revisit some trends and …


The increasing emphasis on environmental issues leads to a production route with far less emissions than coal based processes. The actual lining concept based on standard material for the gas inlet area of DRI shaft furnaces is discussed. According to the special requirements in this application an improved brick was designed.


In the upper part and the middle section of the shaft furnace the re- fractory lining is exposed to strong abrasion due to the feed of lump iron ore in that area as well as strong gas circulations caused by the off-take which is placed in the upper part.


A vertical reduction furnace for the production of metallic iron by means of the direct reduction of iron ore (DRI), comprising an iron ore feed zone, an iron ore reduction zone, a metallic iron discharge zone (3), accumulation means (6) communicating at an inlet end with the metallic iron discharge zone (3) and at an outlet end with gas sealing means (7).


A vertical shaft furnace for the direct reduction of iron oxides to obtain directly reduced iron (DRI) comprising these devices: (A) a gravity feed having in its upper part a plurality of Förderschenkelrinnen (112) for the supply of the oxide, a drying zone (101) take place in the prereduction reactions and reduction reactions, ring connections (131, 132) for the introduction …


The Development of Improved Lining Material for DRI Shaft. Keywords: refractory lining, DRI shaft furnace Fig. 1 Schematic diagram of the DRI process *) Paper to be presented at the UNITECR 2009 on 13–16 October in Salvador / Brazil 1.1 Relevant working conditions and the requirements If we take a look on a DRI shaft furnace we have three major problems to solve.


Direct Reduced Iron (DRI) is the second most viable source of iron used in steelmaking after pig iron or hot metal produced in blast furnaces. DRI is produced by direct reduction of iron ore using carbon monoxide and hydrogen. Natural …


In gas-based DRI processes, the charge mix is introduced into a cylindrical refractory-lined shaft furnace, where it descends by gravity flow and is contacted by upward flowing reducing gas (hydrogen and carbon monoxide), which reacts with it to reduce the material prior to producing DRI for discharge. 6


Electric Arc Furnaces (EAFs) are a central part of the production route that is an alternative to the dominant BF-BOF route. EAFs are used to produce carbon steels and alloy steels primarily by recycling ferrous scrap. In an EAF scrap and/or manufactured iron units – such as DRI, pig iron, iron carbide – is melted and converted into high quality steel by using high-power electric arcs ...


•Higher capacity shaft furnaces–up to 2.5 Mtpy of DRI •7.65 meter I.D. furnace, larger MIDREX ® Reformer •MXCOL ® using coal gasifier •Coke oven gas injection to MIDREX ® Shaft Furnace •TRS™ for use of coke oven gas in MIDREX ® Plant •Hot transport options: containers, conveyor, and HOTLINK ® gravity feed


The steel industry accounts for 4% of all the CO2 emissions in Europe and 22% of the industrial carbon emissions in Europe.Hydrogen is one way of reducing emissions in the steel sector, either as an auxiliary reducing agent in a blast furnace (H2-BF), which was covered in part 1 of this series, or as the sole reducing agent (H2-DRI) in a process known as direct reduction …


The shaft furnace is the heart of the hydrogen-ironmaking process, and the crucial question is as follows: can such a shaft furnace be operated under pure H 2 and produce a well-metallized DRI, similar to the current ones—except of course for its carbon content? Some of the projects mentioned above, such as HYBRIT, plan to answer this ...


In contrast to the blast furnace some reactors operate at lower temperatures to produce a solid state iron product in one step. A reduction gas is introduced into a shaft type furnace were it interacts with the iron oxide through a redox reaction. The product is called direct reduced iron or DRI for short,


Direct Reduced Iron (DRI) is an alternative to the blast furnace processes to produce a source of iron units. Greater availability of natural gas has replaced classic coke oven coal-based processes. Several processes are commercially viable today and they use a number of ways to achieve good quality DRI. Refractories for DRI


Answer: 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...


Direct reduced iron (DRI), also called sponge iron, is produced from the direct reduction of iron ore (in the form of lumps, pellets, or fines) into iron by a reducing gas or elemental carbon produced from natural gas or coal.Many ores are suitable for direct reduction. Direct reduction refers to solid-state processes which reduce iron oxides to metallic iron at temperatures below …


Heng Zhou, Qin-fu Hou, Ming-yin Kou, Shun Yao, Sheng-li Wu, Discrete element method study of solid descending and residence properties in COREX shaft furnace with center gas supply device, Journal of Iron and Steel Research International, 10.1007/s42243-019 …


A multipart refractory assembly comprising a left hand section comprised of two mated parts and a right hand section comprised of two mated parts, which sections when laid-up contiguously form a portion of the bustle of a vertical shaft furnace and an inlet passage extending from the bustle to the interior of the vertical shaft furnace.


(e) Furnace shape: The furnace has a typical shape like rectangular chamber, circular tower (shaft), long chamber (tunnel), rotating drum (rotary kiln), etc. (f) Furnace material: The furnace has a structure made of a refractory material or combination of refractory materials which would sustain high temperature working conditions.


Direct reduced iron (DRI) process. In addition to the process route via the blast furnace process, there is another option for extracting crude steel from iron ores using the so-called direct reduced iron (DRI) process (secondary route).The starting point for the efforts to find an alternative to the blast furnace process was the relatively high process expenditure.


Caldezone, an e-commerce medium that provides the best quality refractory castable for Direct Reduced Iron (DRI) or sponge iron across various zones in India. Calderys has the expertise in manufacturing refractory castable for Direct reducing iron


Most direct-reduced iron (DRI) is produced in shaft furnaces, where the ore contacts the reducing gas in countercurrent flow in moving or stationary beds. Gaseous reducing agents, namely carbon monoxide and hydrogen, are introduced to the base of the shaft furnace at elevated temperatures of up to 1000°C.


The heart of the gas based process is the shaft furnace. It is a cylindrical, refractory-lined vessel and is a key component of the direct reduction process. It is a flexible as well as a versatile reactor. It can use natural gas, a syngas from coal, coke oven gas, or exhaust gas from the Corex process as the reducing gas.


Plants based on the MIDREX Process each year produce more than 60% of the entire world's supply of DRI and more than 80% of DRI produced by shaft furnace technologies. MIDREX Plants are known for their reliability, flexibility, and hours of continuous operation, often well beyond industry standards.


shaft furnaces, MIDREX, HyL and ENERGYRON, while the productions of DRI in rotary kilns is 21,2 % from the total output [2]. Diverse process use the …


Midrex Operator Manual Dri - andreschellen.nl Midrex process is simple to operate and involves three major unit operations namely (i) iron ore reduction, (ii) gas preheating, and (iii) natural gas reforming. The heart of the Midrex process is its shaft furnace. It is a cylindrical, refractory-lined vessel and Midrex Operation Manual - dev ...


3.1 Myth – DRI Cannot be Shipped Distances x Reality – More DRI than HBI is Shipped Today Despite the known self-combustion (auto-ignition) risks involved in stockpiling and transport of DRI, more DRI than HBI has been shipped annually since 2006: in 2013, 8.56 MTe (9.42Mt) DRI vs. 5.65 MTe (6.22Mt) HBI - Venezuelan HBI shipments to


•Commercial agreements with Refractory Providers. •Ceramic fiber Board, Blankets & Modules ... INSTALLATION DRI PELLET Steam and CO2 Reformer, Heat Recovery System, Shaft Furnace, Scaffolding. INSTALLATION CUPPER Shaft Furnace, Retention Furnace and all the Channels . FABRICATION Steam and CO2 Reformer, Heat Recovery System, Shaft Furnace ...