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Sl Rn Natural Gas Based Rotary Kiln

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  • Rotary Kiln Manufacturers Electrotherm Et

    Rotary Kiln with SL/RN Process. Coal Based Rotary Kiln for Direct Reduced Iron / Sponge Iron (100 TPD, 350 TPD, and 500 TPD) Solid-state reduction of Iron Ore using either coal/gas as a medium of reduction to produce a substitute raw material for steel making is termed as Direct Reduced Iron (DRI). Since DRI is produced by removing oxygen from iron ore, its structure is just like a sponge with a network of connecting pores.

  • Present State Of The Sl Rn Process And Its

    4. Description of a few SL/RN and Lurgi Rotary Kiln Plants The reduction plants based on natural gas built so far have in most cases been set up within PROCUCTION COST OF STEEL EOLLETS OM J t) INFLUENCE OF SPONGE IRON AND POWER PRICES ON PRODUCTION COSTS OF STEEL BILLETS Fig. 7 one group of firms (such as Midland Ross or

  • Nitrogen In Slrn Direct Reduced Iron Origin And Effect

    DRI production is dominated by gas-based reductant processes like MIDREX (58% of world DRI produced in 2010),1 but coal-based reduction remains ... (SL/RN) rotary kiln process.1 In this process, approximately 1.5 tons of lump ore (-31.53.15mm), 800 kg of coal and 40 kg of dolomite are fed to a kiln to produce 1 ton of DRI. At the kiln exit, the

  • Direct Reduction Combustion Technology

    SL/RN The SL/RN coal-based process also uses a rotary kiln inclined at 3-4% of horizontal. All the coal feed is introduced at the upper end of the kiln to ensure a uniform temperature distribution along the length of the reduction zone, and to ensure that combustion takes place at the bed surface.

  • Prospects For Coalbased Direct Reduction Process

    based DRI occupies 17.6 million tonnes, which equates to 25.7% of the total1). Most coal-based reduction processes including SL/RN2) employ rotary kilns. Pellets, or lump-ore, mixed with coal are/is charged into the rotary kilns2) and heated by coal burners to produce DRI. To

  • Operational Aspects Of Sponge Iron Production

    erection. The SL-RN process also uses rotary kiln for reducing iron ore. The plant, as shown in Fig. 2, essentially consists of raw material handling and preparation systems, rotary kiln with heat-ing arrangements for reduction of iron oxide, kiln for cooling the reduced material

  • Bhagwati Power Steel Limited

    SL/RN Process, useful when coal of low ash sulphur content available ROTARY KILN Process, the most widely accepted process. The ITC Technology which has experience in operation of smaller plants using the wide range of raw materials from different sources like iron ores from Ballery-Hospet region, Bailadilla, Barbil etc.

  • Direct Reduction Process An Overview Sciencedirect Topics

    However in the coal/oil-based DR process, the reducing gas is generated from hydrocarbons (primarily coal, but sometimes oil and natural gas) in the reduction zone of the furnace, which is typically a rotary kiln. Typical examples of the coal-based process include the SL/RN and ACCAR processes.

  • Direct Reduced Iron Industrial Efficiency Technology

    rotary kilns ( SL/RN process) rotary hearth furnaces ( Fastmet /Fastmelt , and ITmk3 ) fluidised bed reactors ( Circored ) (IPPC, 2009) As there is no melting and no slag phase in DRI production, all gangue elements of the iron ores remain in the DRI and need to be separated via a slag in the EAF.

  • Recovery And Utilization Of Waste Heat In A Coal Based

    outside the kiln reduces amount of coal consumption. To bring waste gas from ESP outlet to rotary kiln an insulated duct, which is a hollow cylinder of 43m length and 0.6m diameter, is used. To preheat kiln air using waste gas a plate type heat exchanger is designed using a software package HTRI (Xphe, ver. 5.0). There are

  • Slrn Process Industrial Efficiency Technology Measures

    SL/RN Process. The so-called Stelco-Lurgi/Republic Steel-National Lead (SL/RN) process is a widely used coal-based DRI-making process which uses a rotary kiln. The process uses lump ore, pellets, beach sand or ilmenite ore and solid carbon to produce hot or cold DRI. The process operates at high temperature and atmospheric pressure.

  • Rotary Kiln Direct Reduction Processes Sl Rn Pdf

    ppt for rotary kiln process of making sponge iron rotary , Rotary Kiln with SL RN Process Steel making Solution Rotary Kiln with SL/RN Process Coal Based Rotary Kiln for Direct Reduced Iron / Sponge Iron (100 TPD, 350 TPD, and 500 TPD) Solid-state reduction of Iron Ore using either coal/gas as a medium of reduction to produce a substitute raw material for steel making is termed as Direct ...

  • Direct Reduction A Review Of Commercial Processes

    The rotary kiln processes differ mainly in design of the heating system and in the selection of operating conditions such as type of ore, type of coal, feed rates, gas and solid temperatures, and oxygen potential. The SL/RN process will be briefly described here as an illustration of rotary kiln processes.

  • Bhagwati Power Steel Limited

    Coal based Rotary Kiln process - Solid Reduction. ... All the gas based plants in operation use natural gas as the reluctant and are all along the HBJ line. The natural gas is under the GAIL control, which is a government organisation, and the steel sector is not the priority sector for the sanctioning of

  • Mathematical Modeling Of Pneumatic Char Ostigov

    Oct 01, 1999 articleosti_20001690, title Mathematical modeling of pneumatic char injection in a direct reduction rotary kiln, author Ramakrishnan, V and Sai, P S.T., abstractNote A one-dimensional steady-state mathematical model is proposed for direct reduction process in rotary kilns akin to the SL/RN process. The model takes into account pneumatic coal char injection from the discharge end ...

  • Pdf Comparison Of Different Coal Based Direct Reduction

    The rotary kiln processes include ACCAR/OSIL, DRC, Krupp-CODIR and SL/RN processes. ... Midrex and HYL processes are generally used for gas based reduction and SL/RN . ... process was a natural ...

  • Direct Reduced Iron Industrial Efficiency Technology

    The most common technologies used for DRI production are MIDREX and HYL III, both using natural gas (IEA, 2007. p.132). DRI processes can be divided up by the type of reactor employed, namely shaft furnaces (Midrex , HyL) rotary kilns (SL/RN process) rotary hearth furnaces (Fastmet /Fastmelt , and ITmk3 )

  • Tunnel Kilns For Making Dri In Russia Ladolceitaliafr

    Rotary Kiln with SL/RN Process. Rotary Kiln with SL/RN Process. Coal Based Rotary Kiln for Direct Reduced Iron / Sponge Iron (100 TPD, 350 TPD, and 500 TPD) Solid-state reduction of Iron Ore using either coal/gas as a medium of reduction to produce a substitute raw material for steel making is termed as Direct Reduced Iron (DRI). read more .

  • The Effect Of Reduction Time And Size

    The basic principle of the SL/RN process was used on numerous rotary kiln plants and still represents the dominant technology for the direct reduction of lump ore or pellets using coal as the reducing agent (www.outotec.com). In the traditional SL/RN process, iron ore, coal, and

  • Direct Reduced Iron And Its Production Processes

    Mar 16, 2013 Metallization, reformed natural gas, residual elements, Rotary kiln, Direct Reduced Iron and its Production Processes Direct reduced iron (DRI) is the product which is produced by the direct reduction of iron ore or other iron bearing materials in the solid state by using non-coking coal or natural gas.

  • Coal Based Direct Reduction Rotary Kiln Process Ispatguru

    Feb 14, 2017 Rotary kiln It is the heart of the coal based reduction process since the reduction reaction takes place in this reactor. The diameter and the length of the kiln depend on its capacity. The kiln is generally lined with high alumina castable refractories throughout its length with dams at feed end and discharge end.

  • Pdf A Study On The Accretion Formation In Dri Kilns

    Among all the available options, rotary kilns have been widely used as a reactor in coal based plants and the important processes applying this technology include SL/RN, Codir, ACCAR, DRC, TDR, SIIL and Jindal 69. In the present work SL/RN process based plant is selected for energy conservation as it is oldest and most widely applied process.

  • Ironmaking Alternatives Screening Energy

    NATURAL GAS NATURAL GAS PRODUCTION DIRECT REDUCTION PLANTS PELLET STOCKPILE DRI EAF MELTING ELECTRIC ... 3-2.2 Rotary Kiln 3-2.3 Rotary Hearth 3-2.4 Fluidized Bed 3-2.5 Other (Reactor, etc.) ... SL/RN OTHER Da000201052901commonDOE REPORT OCT 2000Section 1.doc Page 4 of 7. 1

  • 1 Selection And Implementation Of New

    Solid fuel based reduction of iron ores in a great SL/RN rotary kiln process, built in the early 1970s During the process scale- up (3 times increase in rotary kiln diameter) the efficiency of heat and mass transfer was overestimated As a result, the kiln throughput was limited and the process become uneconomic

  • Pdf Modeling Of Rotary Kiln For Sponge Iron Processing

    Simulation of Rotary Cement Kilns Using a One-Dimensional Model By Vivek Ranade 523-1 Designing of an Intelligent Fuzzy Logic System for Accretion Prevention in Sponge

  • Optimization Of Air Distribution In Direct Reduction

    Aug 01, 1999 An algorithm for optimization of the air distribution in direct reduction process in rotary kilns akin to the SL/RN process is proposed, based on Pontryagins continuous maximum principle. The optimum air distribution has been obtained for given operating conditions. The optimum air distribution has been found to have a definite pattern with small changes due to variation in process conditions.

  • Hyl Direct Reduction Technology Adaptations For The

    Rotary kiln coal-based DR plants, based on single module, are designed for up to a ... based on natural gas (NG), to fulfill small steelmakers onsite needs. Proper engineering to simplify plant ... SL/RN pellet/lump/fines solid 0.25 operating Tecnored fines molten 0.30 pilot plant

  • Energy Integration In Sponge Iron Plant Using

    SIL Process is based on the Lurgi or the SL/RN Process. 2.1.4.1. SL/RN Process The raw materials (iron ore, coal and dolomite) are charged into the rotary kiln with the help of conveyor. Compressed air is injected into the rotary kiln at various places with the help of blowers. The temperature of

  • Alternative Routes Of Iron Making

    1. Using solid reductant i.e. Coal based Direct Reduction (DR) process 2. Using gaseous reductant i.e. Gas based Direct reduction process Process Reactor used Ore used Reductant used MIDREX Shaft Lump/pellet Gaseous HyL Retort Lump/pellet Gaseous SL/RN, ACCAR, CODIR etc Rotary Kiln Lump/pellet Solid HIB Fluidised bed Fine Gaseous

  • V Venkateswaran

    20 Interio vie ofw the pilo SL/R kilNt taken rn from th discharge end 8e 9 21 Air profil usine fo lignitrg the kile n run coal and Griffith pellets 92 22 Solid temperatur profile es for the kiln run using lignit coae anl d Griffith pellets 93 23 Ga temperaturs profilee for the kiln run using lignit coae anl d Griffith pellets 94

  • Extracting More Sponge Iron Is Imperative To Boost Steel

    Sep 29, 2019 This method is preferred in countries where natural gas is abundant and cheap. In the coal-based DR process, reducing gas is produced from non-coking coal in the reduction zone of the furnace, typically a rotary kiln. (Sponge Iron Plants) Typical examples of coal

  • A Study On The Accretion Formation In Dri Kilns And

    Jan 11, 2016 At present, there are 118 large and small sponge iron plants operating in India, among them only 3 are natural gas based and the remaining 115 plants are coal based. Among all the available options, rotary kilns have been widely used as a reactor in coal based plants and the important processes applying this technology include SL/RN, Codir ...

  • Direct Reduction Iron Makingppt Norpeinture

    direct reduction process, including laboratory and pilot plant programs. Our direct reduction offering covers Design, engineering, delivery, and services for tradi-tional SL/RN direct reduction plants based on a rotary kiln, with non-coking coal as the reductant and . Send Inquiry

  • State Of The Direct Reduction And Reduction

    flue gas to preheat the feed gas mixture, the burner combustion air and the natural gas feed. In addition, depending on the economics, the fuel gas may also be preheated. 6. 1. 2. HYL The second-largest DRI technology in terms of production tonnage is the HYL process developed by Hylsa of Mexico 9.

  • Gratecar Process Design Potgrate And Caf Testing Ostigov

    Dec 31, 1996 Svedala has a ported kiln process, designed specifically for the direct reduction of pelletized or natural lump iron ores. The process is called ACCAR. This ported kiln technology has been coupled with Svedalas Grate-Kiln System, for iron ore pelletizing, into the Grate-Car System for the reduction ...