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Evaluation of the EIR for Mittal's proposed MSVS expansion

The choice between the SL/RN process and the Midrex process would increase these baseline emissions by still a relatively small fraction (16% versus 0.3%). Although this comparison has the effect of diminishing the relative difference in emissions resulting from the choice between the SL/RN process and the Midrex process,

dri production by tunnel kiln in india

DRI production using tunnel kiln is traditional and low investment production process suitable for developing areas where investment in SL RN(or other rotary kiln systems)seems not feasible tunnel kiln reduction process has mature technology and can produce high quality DRI for steel plants

ISSN: (Print) (Online) Journal homepage: ...

Direct Reduced Iron: Production ... The DR process is intrinsically more energy efficient ... does not work at high temperatures to separate the DRI. Coal-based DR processes like SL/RN (1970 ...

Sponge Iron – Prakash Industries Limited

The manufacture of sponge iron entails the de-oxidisation of iron ore through the direct reduction. Direct reduction is a process by which metallic iron is produced by the reduction of iron ore below the melting temperature of iron. The production technology of DRI has two distinct routes.

sponge iron process

Jul 29, 2010· Flow chart of SL/RN process has been shown in fig. 1.Sized Iron Ore and Non Coking Coal along with Dolomite are fed continuously to the charge end of Rotary Kiln inclined at 2.5%. Coal is also injected through an Injection Pipe at the discharge end of Kiln.

Direct-Reduced Iron - an overview | ScienceDirect Topics

Typical examples of the coal-based process include the SL/RN and ACCAR processes. The coal-based DR process is more popular in India and China. Different types of reactors, such as shaft furnaces, fluidized beds, rotary kilns, and rotary hearth furnaces, have been used in different variations of the processe to achieve the metallization required.

Session II Utilizing DRI Ian Cameron, Hatch Ltd.

Session II Utilizing DRI • The DRI Business Case ... gases.Process employs a stoichiometric ... – SL/RN –Xtra (Outotec) • DRI from lower grade iron ore and/or tailings – Use of iron resources that are otherwise of no value Other DRI Technologies.

Prospects for Coal-based Direct Reduction Process

DRI, making DRI from iron-ore and coal. The process, however, has a drawback: the DRI produced may have a decreased iron content and/or increased sulfur content, depending on the quality of the coal used. This impedes the commercial use of the process for producing DRI from iron ore. On the other hand, with an eye to resource


SL/RN DRI is one where nitrogen present within the atmosphere of the rotary cooler (where hot DRI, discharged at 1000°C from the rotary kiln, is cooled to approximately 100 °C in ca. two hours) penetrates the solids bed and nitrides DRI

Sponge Iron Division – Trimula Industries

This plant is based on SL/RN process. Rated capacity of this plant 0.21mtpa. In addition to producing DRI, the system is equipped with waste heat recovery boiler from where we can generate 16 MW/hr power from waste gas.

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New Ironmaking Processes: Relevance to India

DRI Production Technologies • DR processes have overcome many of theirs conceptual & engineering problems, and hence have been commercialized throughout the world in a big way. • Two major production technologies: – Coal Based Rotary Kiln process – ~20% of world DRI production – SL / RN Process, Jindal Process, TDR etc.

Rotary kiln - Wikipedia

A rotary kiln is a pyroprocessing device used to raise materials to a high temperature (calcination) in a continuous process.Materials produced using rotary kilns include: Cement; Lime; Refractories; Metakaolin; Titanium dioxide; Alumina; Vermiculite; Iron ore pellets; They are also used for roasting a wide variety of sulfide ores prior to metal extraction.

Study on Accretion Formation on DRI kiln during spong iron ...

USA and HYL-III process of HYLSA. These contribute over 80% of world sponge iron production today. Out of the coal based technologies SL/RN technology of Lurgi , West Germany has been the most successful one. Little success has been achieved by other coal based technologies namely CODIR technology of Krupp Industriatechnik now

SL/RN | Middle East Steel Industry

Total CO 2 emissions from the process are reported to be 2.17 t CO 2 /t-steel. Capital expenses for the process are estimated to be $347.6/t-steel. Production costs are estimated to be lower than other DRI processe. Commercial: Circored: Gas usage of the process is reported to be 11.5 GJ/t which is lower than Blast Furnace (IEA, 2007. p. 133).

Ironmaking Alternatives Screening - Energy.gov

DRI PRODUCTION BY PROCESS TYPE Wor ld DRI production by Process (1999) Total 38.61 million metric ton 2% 23% 0% 67% 3% 5% FINMET HYL IRON CARBIDE MIDREX SL/RN OTHER Da000201052901commonDOE REPORT OCT 2000Section 1.doc Page 4 of 7

Mathematical model of the SL/RN direct reduction process ...

A mathematical model has been developed to predict the operating behavior of an SL/RN direct reduction kiln from a knowledge of the main process variables. The model is based on steady state principles and is capable of quantitatively describing the different chemical reactions in the kiln such as reduction, Boudouard reaction, coal devolatilization, combustion in the freeboard together with ...


SL/RN technology is a coal based rotary kiln direct reduction process : Process : ... Now the coal if the desired temp. for reduction process is obtained, iron ore with dolomite is fed from inlet of the kiln. ... reducibility etc. at present Iron Ore Pellet is used in the DRI section. By virtue of its location, Hospet & Orissa regions which ...

Characterisation of the Physical and Metallurgical ...

In the DR process (Route 2), only natural ores with high physical and metallurgical properties are applied. Among the numerous processes for direct reduction of iron ore, the Midrex and HYL III (by means of gas) and the SL/RN (rotary Kiln; by means of coal reduction) have had the most successful industrial implementation [13, 18, 19].


throughput with SL/RN-Xtra The standard SL/RN process has been used for over 40 years to produce direct reduced iron (DRI) from lump ores or iron ore pellets. However, with the decreasing availa-bility of lump ores the ability to process fine-grained ores and concentrates is …

Recovery and utilization of waste heat in a coal based ...

the reduction process, it is often termed as direct reduced iron (DRI). It is seen that the growth of sponge iron industry in last few years is unremarkable and today India is the largest producer of sponge iron as it covers 16% of global output. According to Sponge Iron Manufacturers Association [1], India has produced around 23 million

SL/RN | Downstream Consulting Pty Ltd

The SL/RN process is a kiln based direct reduction process which produces hot or cold DRI from lump, pellets, fines (including iron sands and ilmenite ore). The process is coal based and works at high temperature and near atmospheric pressure.

Our Process | UMCIL

The SL/RN coal-based direct reduction process for the conversion of iron oxide ore with coal around 1000 degrees C into sponge iron or direct reduced iron (DRI); The Danieli electric arc furnace steel making process involves melting the DRI together with scraps above

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

The actual process of the coal based sponge iron production is based on SL/RN process (jointly developed by the Steel Company of Canada, Lurgi Chemie, Republic Steel Company and National Lead Corporation in 1964), which works on direct reduction of ore.This process is adopted by worldwide conventional sponge iron industries.

Direct Reduced Iron (DRI) and CO CtCapture

Presentation OutlinePresentation Outline • Background • Gas Based - Direct Reduced Iron • Midrex • Hyl-III and Hyl-ZR • ULCORED • Hybrid System • Corex-DRI SchemeDRI Scheme • Gasification-DRI Scheme • Coal BasedCoal Based – Direct Reduced IronDirect Reduced Iron • SL/RN …

DRI | Middle East Steel Industry

Total CO 2 emissions from the process are reported to be 2.17 t CO 2 /t-steel. Capital expenses for the process are estimated to be $347.6/t-steel. Production costs are estimated to be lower than other DRI processe. Commercial: Circored: Gas usage of the process is reported to be 11.5 GJ/t which is lower than Blast Furnace (IEA, 2007. p. 133).