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The iron oxide feed to a Romelt process can be any iron containing material, e.g. iron ore fines and concentrates, blast furnace and BOF dusts and sludges, mill scale, iron bearing slags, scarfing wastes and turnings, and iron dusts etc. The wet non-coking coals of 15 % to 20 % volatile matter and around 8 % to 10 % ash can be used for the process.
The COREX process is being projected as an alternative for blast furnace iron making. The coal consumption of the COREX process is large with a net fuel rate of~1000kg/tone of hot metal (THM).
COREX IRON MAKING PROCESS PDF. August 20, 2019 admin. Corex Process for Production of Iron. During the late twentieth century, several new initiatives have been taken for the development of the. COREX PROCESS in IRONMAKING …
COREX PROCESS Charge is charged into a reduction shaft where they are reduced to direct reduced iron (DRI) by a reduction gas moving in counter flow. Discharge screws convey the DRI from the reduction shaft into the melter –gasifier. In Melter-gasifier final reduction and melting takes place. Hot metal and slag tapping are done as in ...
The attractiveness of the Corex process is due to i hot metal quality suitable for steelmaking, ii low investment and operational costs due to the elimination of coke ovens and by product plant, iii low process related emission rates, iv use of a wide variety of iron ores and especially non-coking coals, and v generation of a highly valuable ...
- Process optimization, smooth operation and failure investigations - Alignment of plant strategy with plant capability - Development of process models - VIU evaluations for new… Experienced in modern Iron and Steel Making technology. Corex Blast Furnace, Midrex DRI plant, Conarc Steel shop and Inline Strip Process World Class Manufacturing ...
A brief technical review about what is COREX process of iron making, some merits and demerits of COREX technology. The second stage of the process consists of melting and cogex of hot DRI by the coal and oxygen which is added in the meter-gasifier. After the success of the smelting reduction technology was achieved through operation of C module ...
Corex Process for Production of Iron | Corex process distinguishes itself from the blast furnace route by i direct use of non-coking coal as reducing agent and energy source, ii Iron ore can be directly and feasibly charged to the process in form of lump ore, and pellets, and iii use of pure oxygen instead of nitrogen rich hot blast.
Corex Reduction Shaft Furnace. The primary reduction of the iron oxide feed stocks takes place in the reduction shaft furnace. The residence time in the redu...
Iron-making provides a vital engineering input in the process of steel production. This requires huge investment and hence, selection of an appropriate iron-making technology is very crucial in a capital scarce country like India. However, in this arena Blast furnace (BF) technology is considered as proven and the dominant one. Meanwhile, a new technology named Corex has emerged in this …
The Corex process, 24 commercialized by Voest Alpine, combines an iron melter/coal gasifier vessel with a pre-reduction shaft to produce a liquid product that is very similar to blast furnace hot metal. Coal, oxygen, and pre-reduced iron are fed into the melter/gasifier to melt the iron and produce a highly reducing off-gas.
The COREX process, an alternative iron-making technology, is independent on coking coal to meet the environmental and source requirements, and it has been successfully applied in China, India, South Africa and South Korea [1,2]. Two COREX-3000 processes, the melting rate of which aims to
MM3020: Iron making and steelmaking (2012-13-II) Instructor In charge: Dr. Ajay Kumar Shukla Department of Metallurgical and Materials Engineering IIT Madras, India. Learning Objectives To apply the principles of physical chemistry and transport phenomena (heat, mass and momentum) to the process steps in Iron
Understand the production of hot metal (iron) with different methods: blast furnace, Corex process, Finex process etc with sketch. Illustrate the making of iron and steel making process with detailed flow diagram from making iron to solid steel. 2. Iron making in Blast Furnace
(ii) Absence of post combustion means that much chemical energy is lost in the exit gases and consequently the coal consumption in Corex is much higher than in any other iron making process. (iii) The system is maintenance oriented, including cooling gas compressor for recycling part of COREX gas for cooling the hot gases from the melter-gasifier.
Corex, the unique smelting-reduction process allows for the cost-effective and environmentally friendly production of hot metal from iron ore and coal. In the Corex process, all metallurgical work is carried out in two separate process reactors—the reduction shaft and the melter gasifier.
Of the Alternative Direct Iron Reduction Processes, 67% of the DRI is produced by the Midrex Shaft Furnace DRI processes. The second-most production of DRI (23%) is by the HYLSA processes. The balance is split between SL/RN (3%), Finmet (2%) and Other (predominately Corex at 5%).
Another draw back of the Corex process is that it depends on efficient usage of the large amount of export gas for its economical viability. Finex. In the Finex process the reduction shaft of the Corex is replaced by a series of fluidised beds. This enables the Finex process to use fine ores instead of lump ore or pellets.
23 Alternative routes of iron making: Sponge Iron 24 SL/RN process 25 MIDREX process 26 HyL process 27 Smelting Reduction 28 COREX, ROMELT, Hismelt process . LECTURE-1 Introduction to Iron Making Introduction Iron is a chemical element with …
The Corex process is considered as friendlier to environment than the blast-furnace process. This is because; non coking coal is used as a source of energy in Corex process. The Corex process consists of two separate reactors namely melter gasifier and reduction shaft. Fig 2 Process flow of Corex plant The Fig 2 shows layout of process flow in ...
In a nutshell, COREX is a coal based SR (smelting reduction) process of making hot metal or pig iron by direct use of non-coking coal. The outputs can be used either by integrated mills or EAF (electric arc furnace) mills. The process gasifies non-coking coal in a smelting reactor, which also produces liquid iron.
zation process, limestone is employed for modifying the pellet basicity. JSWSL produces basic pellets with basicity (CaO/SiO 2) 0.40 to 0.50. In recent years blast furnace/ Corex iron making units prefers fluxed pellets as iron bear-ing feed because, fluxed pellets gives precise quality re-quirements required by the iron making units.
Smelt reduction, which integrates ore agglomeration, coke making and iron production in a single process, offering an energy-efficient alternative at small to medium scales (IPCC 2007). As an example, Price et al. (2001) demonstrate that South Africa developped the COREX process, as it possesses large reserves of suitable iron ores, but only ...
Process. The Corex process consists of two main parts a Reduction Shaft and a Melter- Gasifier.The main reagents for the Corex process are iron ore, noncoking coal, and oxygen. Unlike the Blast furnace the Corex process does not use a hot blast of nitrogen, thereby greatly reducing NOx gas emissions, but instead uses oxygen. In addition, the Corex process can use iron oxides containing up to ...
The process has been developed to treat iron ore fines with minimum of pre-treatment, making the process more flexible in terms of the quality of iron ore it can treat. The process allows the use of non coking coal and iron ore fines with significant impurities. The main product of the process is liquid iron or hot metal which can be used in ...
Corex Process for Production of Iron. During the late twentieth century, several new initiatives have been taken for the development of the. COREX PROCESS in IRONMAKING Report Submitted by: Aditya Kumar Singh ( ), Bachelor in Technology, Metallurgy & Materials.
Corex is a smelting reduction process combining a melter gasifier with a reduction shaft. The process takes lump iron ore or pellets, non-coking coal, and oxygen as main inputs. Similar to the blast furnace process, the reduction gas moves in counter flow to the descending burden in the reduction shaft. Then, the reduced iron is discharged from the reduction shaft by screw conveyors and ...
Environment-friendly Corex process of iron and steel making: The highlight of the process is it does not require coking coal. The process differs from the conventional blast furnace route; where un-treated non-coking coal can be directly used for ore reduction and melting work, eliminating the need for coking plants.
As availability and cost of coking coal are becoming serious issues, alternative routes of iron and steel production such as COREX, shaft-based process for direct reduction of iron and electric ...
making process. New iron making processes have been extensively explored with a view to saving resources and energy, as well as reducing environmental pollution. The present scenario of iron and steel sector is very much challenging. Consolidation of the iron and steel branches manifested itself in a significant increase of mergers and takeovers.
A special manufacturing process is making the production of iron much more environmentally friendly. The outstanding feature of the "Corex process" is that it uses conventional coal instead of coking coal, the customary ingredient. Siemens is currently building the world's largest Corex-based plant in China.
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