Direct reduced iron - Wikipedia

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) to 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 the melting ...

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Energy survey of the coal based sponge iron industry ...

1-9-2015· The material balances of the sponge iron process, shown in Table 1, are carried out using steps given below. Component mass balance is performed around rotary kiln based on plant data that is presented in Table 1 .

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Gas Based Sponge Iron Manufacturers & Exporters - Galaxy ...

Using coal for reduction of iron ore has severe environmental issues as it leads to emission of carbon in great proportions. This is the reason why the world today prefers gas based sponge iron. Galaxy Enterprise is manufacturers and exporters of high quality gas based sponge iron and supplies it to steel plants in the India and overseas country.

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Iron Sponge Process - an overview | ScienceDirect Topics

James G. Speight Ph.D., D.Sc., in Natural Gas (Second Edition), 2019. 8.5.1 Iron sponge process. An example of a hydrogen sulfide scavenger process is the iron sponge process (also called the dry box process), which is the oldest and still the most widely used batch process for sweetening of natural gas and natural gas liquids (Anerousis and Whitman, 1984).

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GREEN STEEL MAKING - Gas Based Technology for Sponge Iron ...

Sponge Iron (HBI /DRI) as key raw materials. Steel produced by Primary route accounted for around 70% of global production and the rest through Secondary route, however after realizing ... The Liquid steel produced by using Gas Based Sponge Iron along with steel scrap reduces

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Direct Reduced Iron and its Production Processes – IspatGuru

Fig 2 Principle of direct reduction process. Gas based process. In the gas based reduction processes, a vertical shaft kiln is used in which iron ore is fed into the top of the kiln and finished sponge iron is drawn off from the bottom after cooling it so as to prevent its re-oxidation.

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IS 15774 (2007): Sponge Iron/Directed Reduced Iron (DRI ...

IS 15774 (2007): Sponge Iron/Directed Reduced Iron (DRI) Hot Briquetted Iron (HBI) and Cold Briquetted Iron (CBI) ... briquettes made out of sponge iron/DRI produced in gas based direct reduction processes at elevated ... present in sponge iron (resulting from the raw materials), in the form of oxides such as A1203, Si02, CaO, MgO, ...

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(PDF) i) Direct Reduced Iron: Production

This product is known as direct reduced iron (DRI) or sponge iron. ... coal-based DR process and (2) gas-based DR process. Details of DR processes ... material that dilutes contaminants in the ...

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Sponge Iron - an overview | ScienceDirect Topics

Unlike the iron sponge process, the SulfaTreat material is non-pyrophoric and has a higher capacity than iron sponge on a volumetric or mass basis. In the process, the inlet gas stream enters the unit through a small inlet separator to separate out any entrained liquid, salt water, and any liquid hydrocarbon in the gas stream.

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Sponge iron makers urges steel min to ensure raw …

Sponge iron producers are facing issues like interrupted supply of raw materials and high prices of iron ore, Sponge Iron ... Singh said that "gas-based plants have been ... Gratuity Balance ...

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Rotary Kiln Process of Making Sponge Iron C

Fig. 2.6 Energy balance in a conventional rotary kiln sponge iron plant 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010 Year 60 50 40 30 20 20 0 30% 20% 10% 0% World DRI production India’s share, % DRI Production in India tonnes production Figure 2.8 presents the scene with respect to coal and gas based processes. Fig. 2.7 A comparison of ...

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DESIGN OF WASTE HEAT RECOVERY SYSTEM IN A SPONGE IRON …

amongst them only 3 are natural gas based and the remaining 115 plants are coal based. With the availability of raw materials, high demand of sponge iron and less payback period, sponge iron industry has emerged as a profitable venture. However, due to lack of

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A Thesis Submitted for Partial Fulfillment of the Degree ...

requirement of sponge iron production. Today India produce 13.9 million tons of sponge iron, out of which 4.2 million ton is gas based and remaining 9.7 million ton is coal based. India has a proven reserve of 410 million ton of high grade iron ore, another 440 million ton of high grade iron …

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Sponge iron industry needs quick actions for survival ...

25-10-2013· From 2003, coal based sponge iron route dominated because of limited availability of natural gas and fast growing demand of metallics. In fact, no gas based sponge iron/HBI plant came up after 1994 (19 years). During 2003-2008, there had been a rapid growth of coal based sponge iron …

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sponge iron process: 2010

Extensive testing is required for evaluating the suitability of these raw materials for the manufacture of Sponge Iron. Iron Ore: Lump iron ore in the size range of 5-20mm can be used in all coal based rotary kiln processes. In gas based processes 70% iron ore pellets and 30% lump iron ore of …

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Coal Gas for DRI plant - Jindal Steel and Power

Direct-reduced iron (DRI), also called sponge iron is produced from direct reduction of iron (in the form of lump, pellets or fines) by a reducing gases produced from natural gas or coal. This reduction takes place in the temperature range 800- 1050 degrees C when reducing gases; mainly Hydrogen and Carbon-monoxide; react with the iron oxides to produce iron.

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NPTEL :: Metallurgy and Material Science - Materials and ...

Materials Balance in Iron making; Exercises in material balance in Iron-making; Heat balance in iron-making; Unit processes 2. Blast furnace stoichiometry –I; blast furnace stoichiomelry–II; Converting; Material and heat balance in converting; Material balance in cupola; Production of Gaseous fuel; Gassification material and heat balance ...

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MIDREX Processes - 神戸製鋼所

by a sealing gas, allowing the continuous charging of 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

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A Thesis Submitted for Partial Fulfillment of the Degree ...

requirement of sponge iron production. Today India produce 13.9 million tons of sponge iron, out of which 4.2 million ton is gas based and remaining 9.7 million ton is coal based. India has a proven reserve of 410 million ton of high grade iron ore, another 440 million ton of high grade iron …

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Sponge Iron Plants | Steel Manufacturing Companies in ...

Steel manufacturing Company in India, JSPL has world’s largest Coal-based Sponge Iron manufacturing facility at Raigarh, Chhattisgarh with capacity of 1.37 MTPA.

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sponge iron process: 2010

Extensive testing is required for evaluating the suitability of these raw materials for the manufacture of Sponge Iron. Iron Ore: Lump iron ore in the size range of 5-20mm can be used in all coal based rotary kiln processes. In gas based processes 70% iron ore pellets and 30% lump iron ore of …

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DESIGN OF WASTE HEAT RECOVERY SYSTEM IN A SPONGE IRON …

amongst them only 3 are natural gas based and the remaining 115 plants are coal based. With the availability of raw materials, high demand of sponge iron and less payback period, sponge iron industry has emerged as a profitable venture. However, due to lack of

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M/s Bravo Sponge Iron Pvt. Ltd. - Welcome to Environment

1.7 MTPA Iron Ore Pellet Plant with grinding Unit 48000 Nm3/hr Producer Gas Plant 350 TPD Sponge Iron Plant 7 MW of Power Plant on WHRB of 350 TPD Kiln Revision from 600TPD to 1000 TPD Rolling Mill. Material Balance 13 05 Raw materials Requirement and its …

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Chapter 4 MATERIAL BALANCES AND APPLICATIONS

terms will become zero, and the balance equation for steady-state physical process will be simply reduced to: Input = Output 4.3. Balances on Single and Multiple Physical Systems 4.3.1. Procedure for Material Balance Calculations In material balance problems, you will usually be given a description of a process, the values

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Sponge Iron Production by Direct Reduction of Iron Oxide ...

1-12-2012· Sponge Iron Production by Direct Reduction of Iron Oxide - Kindle edition by Chatterjee, Amit. Download it once and read it on your Kindle device, PC, phones or tablets. Use features like bookmarks, note taking and highlighting while reading Sponge Iron Production by Direct Reduction of Iron …

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NPTEL :: Metallurgy and Material Science - Materials and ...

Materials Balance in Iron making; Exercises in material balance in Iron-making; Heat balance in iron-making; Unit processes 2. Blast furnace stoichiometry –I; blast furnace stoichiomelry–II; Converting; Material and heat balance in converting; Material balance in cupola; Production of Gaseous fuel; Gassification material and heat balance ...

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The reasons for the success of Sponge Iron Industry in ...

28-7-2017· Thus, sponge iron prepared through the reduction of iron ore using non-coking coal or natural gas as reductant was developed as a substitute for ferrous scrap. The consumption of sponge iron by EAF typically range 60-80% as an input with the …

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Energy Audit Methodology of Sponge Iron Manufacturing ...

14-7-2014· 72 Kg carbon or 144 Kg coal + 96 Kg O 2 or 417 Kg air + 320 Kg ore reacts to gene rate 224 Kg of sponge iron & 264 Kg of CO 2. Or in other words, to produce 1 Kg of pure sponge iron the stoichiometric requirements of rea-gents are: Iron ore (pure) = 1.43 Kg Coal = 0.64 Kg & Air = 1.86 Kg The products are: CO 2 = 1.18 Kg Flue gas generated = 2.86 Kg

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