آخرین محصولات
DRI Products & Applications - Midrex
HBI is made by compressing DRI discharged from the MIDREX® Shaft Furnace at ≥ 650° C into pillow-shaped briquettes with a typical size of 30 x 50 x 110 mm and a density ≥ 5 gm/cc. No binder is used to make HBI. Hot DRI (HDRI) HDRI can be transported to an adjacent EAF at up to 650° C to take advantage of the sensible heat, which allows the
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Refractory Systems | Direct Reduction Plants
STEULER-KCH supplies the full range of refractories and services for the DRI production process. Upper Part & Middle Section 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
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Elements Of Fuels Furnaces And Refractories By O P Gupta
Fuels, Furnaces and Refractories-J. D. Gilchrist Fuels, Furnaces and Refractories focuses on the sources and efficient use of energy available to modern industry. This book begins with the classification, properties, tests, and different kinds of fuels, as well as trends in fuel utilization.
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Subrat Chhotray - Sales Manager- Refractories for ...
Worked with responsibility for getting new Refractory project orders for both supply and application of refractory in boilers, DRI, Sponge Iron, Reheating furnaces, Lime Kilns, Relining in chemical plants . Attend client meeting to discuss their potential refractory issues and about our capabilities to provide a complete solution for Refractory.
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Potential for CO2 emissions reduction in MIDREX direct ...
MIDREX ® Direct Reduced Iron Cooling Gas Scrubber Cooling Gas Compressor Iron Oxide Natural Gas is used as a reductant. Coke is not required. (Pellets/Lump Ore are reduced to produce DRI without being melt in the 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
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Direct Reduced Iron and its Production Processes – IspatGuru
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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Direct Reduced Iron (DRI) Refractories - R Products
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
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dri refractories shaft furnace - arboassistent.nl
dri refractories shaft furnace. Electric arc furnace - Wikipedia, the free encyclopedia . An electric arc furnace (EAF) is a furnace that heats charged material by means of an electric arc. Industrial arc furnaces range in size from small units of ...
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The MIDREX Process
THE HEART OF THE MIDREX® PROCESS IS THE MIDREX® SHAFT FURNACE. AS A KEY COMPONENT OF THE MIDREX® DIRECT REDUCTION PROCESS, THE MIDREX SHAFT FURNACE IS THE MOST FLEXIBLE AND VERSATILE REDUCTION VESSEL FOR DRI PRODUCERS. The MIDREX® Shaft Furnace can use natural gas or a syngas from coal or coke oven gas as its reductant.
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Midrex Process for Direct Reduction of Iron Ore – IspatGuru
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 is …
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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. The first one is the working ...
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DIRECT REDUCTION PROCESS AND SHAFT FURNACE UTILIZING …
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 zone, the ...
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Metals | Free Full-Text | Hydrogen Ironmaking: How It ...
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 ...
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PERED Technology for Direct Reduced Iron Production ...
PERED Technology for Direct Reduced Iron Production. ... The shaft furnace is unique of its kind and is designed to have improved patterns of the solid and gas flows so as to improve the reactions which are taking place inside the furnace. ... (iii) tapered refractory construction to take care of swelling of DRI, (iv) flexibility to have ...
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Midrex Process Overview - Steelonthenet
•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 ® …
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Coal gasification for DRI production – An Indian solution
The DRI can be discharged from the Midrex shaft furnace at temperatures up to 700ºC. Many of the newer DRI plants are designed to transport the hot DRI to a nearby electric arc furnace to take advantage of the available sen-sible heat. Depending on the distance from the plant to the steel mill, there are different options for method of hot DRI ...
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Process Improvements for Direct Reduced Iron Melting in ...
the ore reduction by coal or reformed natural gas (CO, H2) to direct reduced iron (DRI) or hot briquetted iron (HBI) in shaft furnaces [4–6], rotary kilns [7–10] or rotary hearth furnaces [11]. The reduction of solid pellets is mainly realized at temperatures below melting, 900–1100 C. With increased energy input and adapted reactor ...
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Shaft Furnace - an overview | ScienceDirect Topics
J.D. GILCHRIST B.Sc., Ph.D., A.R.C.S.T., F.I.M., in Fuels, Furnaces and Refractories, 1977 Class 3—Shaft Furnaces. These are used for melting, smelting and calcining or roasting. They are either cylindrical or rectangular shafts through which the solid charge flows down under gravity into the space vacated by discharge of solids or liquids or by gasification of part of the charge.
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Direct reduced iron process - lmmgroupcn
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.
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The Development of Improved Lining Material for DRI Shaft ...
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.
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Simulation On Temperature And Gas Flow Field In Hydrogen ...
DRI shaft furnace, temperature field, gas flow field, heat balance, gas-solid heat transfer, DEM-CFD coupling: PDF Full Text Request: Related items. 1 : Research On Material Transfer In Gas DRI Shaft Furnace And Temperature Field: 2 :
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Hydrogen Steelmaking – IspatGuru
Iron ore is considered to be reduced to DRI by H2 in a shaft furnace, and C-free DRI is considered to be treated in an EAF to produce steel. This route shows promising performance regarding CO2 emissions which is less than 300 kg CO2 / ton of steel, including the CO2-cost of electricity with the emissions from the DR (direct reduction) furnace ...
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Direct-Reduced Iron - an overview | ScienceDirect Topics
Direct reduced iron is iron ore in the form of lumps, fines or pellets that have had the oxygen removed by using hydrogen and carbon monoxide. Typical sources of carbon monoxide are natural gas, coal gas, and coal. Other energy inputs into the production process often include oil and electricity. Since much of the energy used is in the form of ...
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STATE OF THE DIRECT REDUCTION AND REDUCTION …
Direct reduced iron (DRI) is a high-quality metal product obtained from iron ore and it is used as raw material in electric arc furnaces, blast furnaces, and in other more recent steelmaking processes [2]. 2. Total DRI Output in the World With the output of approx. 43.2 mil. tones in 2000 DRI accounts for 3 – 4 % of the total world ironmaking ...
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Interfacial reactions between magnesia refractory and ...
1. Introduction. In the electric arc furnace (EAF) process, the most common form of scrap substitute material is direct reduced iron (DRI). DRI is produced from a combination of lump and pelletized ore reduced in a shaft furnace (e.g., MIDREX furnace) by reformed natural gas [].DRI has several advantages including no unwanted tramp elements, a uniform density and shape, a relatively …
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Jalal Mirfallah - Refractory Engineer Supervisor of 5 MTPY ...
Supervision for Refractory lining different type (Super Duty, High Alumina, Burned Phosphate Bonded High Alumina, Fused alumina Firebrick & Mortar, Insulating Firebricks,Ceramicfibers,Boards, Insulating castables of Shaft Furnace, Reformer, Recuperator, ejector stack, process ducts in DRI plant, Module "F" in MSC. (Mobarakeh Steel Company).
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Behavior of direct reduced iron and hot briquetted iron in ...
The high-temperature properties of the ferrous burden in the cohesive zone of the blast furnace (BF) are a function of its history in the upper shaft. It is considered that charging direct reduced iron (DRI) and hot briquetted iron (HBI) into the BF increases its efficiency and productivity. However, oxidation of DRI and HBI can occur in the low-temperature zone in the BF, which may affect ...
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Discharge options for Direct Reduced Iron and its Hot ...
For the production of HBI, hot DRI is discharged from the vertical shaft furnace at a temperature of around 700 deg C. The hot DRI is sent to briquetting machines to compress it into pillow shape briquettes with typical dimension of 30 mm x 50 mm x 110 mm. HBI is 50 % denser than the CDRI and because of this the tendency of re-oxidation of HBI ...
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Optimising Consteel continuous scrap feeding with roof-fed DRI
Fig 1 Carbon content of DRI possible in the HYL self-reforming shaft furnace 100 Combined carbon (cementite = iron carbide - Fe 3 C) in DRI from HYL self-reforming process 95 90 85 80 75 70 2 3 4 ... the arc and the protection of the furnace refractories. y slag also reduces the slag density which allows the DRI to
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(PDF) Electric Arc Furnace - ResearchGate
Right: Operating cycle for a shaft furnace charging two scrap baskets [33]. ... direct reduced iron (DRI), pig. ... long life for the furnace bottom and refractories. were expected. Then, new ...
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