coal based rotary kiln sl rn process

  • coal based sponge iron making process ppt - BINQ Mining

     · The coal based rotary kiln process of making sponge iron is the focus of the present write ... Coal based processes: 1) Rotary kiln processes (SL/RN, Krupp-CODIR, DRC, ... etc. are used while for coal based processes rotary kiln based ...

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  • Rotary kiln - Wikipedia

    The fuel for this may be gas, oil, pulverized petroleum coke or pulverized coal. Construction. The basic components of a rotary kiln are the shell, the refractory lining, support tyres (riding rings) and rollers, drive gear and internal heat exchangers. History. The rotary kiln was invented in 1873 by Frederick Ransome. Kiln shell

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  • coal based sponge iron process in south africa

    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 process is adopted by worldwide conventional sponge iron industries.

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  • SL/RN | Downstream Consulting Pty Ltd

    The process is coal based and works at high temperature and near atmospheric pressure. The iron oxide combined with coal (usually low cost non-coking coal) and fluxes is fed to the elevated end of the SL/RN rotary kiln. The kiln is divided into 2 sections, the feed end is the preheat zone and the discharge end the for reduction.

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  • OUTOTEC DIRECT REDUCTION AND SMELTING REDUCTION

    tional SL/RN direct reduction plants based on a rotary kiln, with non-coking coal as the reductant and fuel. • Design, engineering, delivery, and services for SL/ RN-Xtra plants, which use a combination of a pre-hardening grate and traditional SL/RN kiln for the treatment of iron ore fines. • Hydrogen-based Circored fine ore reduction plants

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  • HYL III and SL/RN - The two widely accepted gas based DR ...

    SL/RN and HYL are two such gas based direct reduction technologies (DR) or iron making processes. While HYL is a batch-type gas based process and uses a countercurrent shaft-furnace, the SL/RN process (Stelco–Lurgi/Republic Steel–National Lead) utilizes rotary kiln to reduce lump ore, pellets and sand iron with coal.

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  • COMPARISON OF DIFFERENT COAL BASED DIRECT REDUCTION …

    PDF | In this report coal-based direct reduction processes that are currently in commercial operation or under development are discussed and compared. The coal-based processes can be grouped into ...

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  • SL/RN process - Outotec

    The process principles are the basis for numerous rotary kiln plants and still represent the dominant technology for the direct reduction of lump ore or pellets using coal. Operates with the widest range of iron-bearing materials, such as pellets, lump ore, beach sand, ilmenite and also iron ore fines with SL/RN …

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  • Coal-Based Dr Processes Using Rotary Kilns | Beyond the ...

    Most of the established rotary kiln-based DR processes operate on the principle that the reduction is carried out exclusively by carbon monoxide obtained by the gasification of the fixed carbon content in coal. In the year 1991, SL/RN plants alone produced 0.83 million tons of Direct reduced iron (DRI), accounting for about 56% of the world's ...

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  • NITROGEN IN SL/RN DIRECT REDUCED IRON: ORIGIN AND …

    making up 50% or more of the total iron charge. DRI produced with coal based reductants (for example in rotary kilns) make up roughly 25% of DRI produced in the world. It was found that SL/RN DRI samples from a kiln cooler had high nitrogen contents (50 …

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  • Coal Based Direct Reduced Iron_Rotary kiln DR_

    The different coal based processes include retort / shaft (Echeverria Kinglor Meter, Wiberg), Tunnel Kiln (Hoeganes) rotary kiln ( ACCR/ OSIL,Lurgi, Krupp Renn, DRC TDR, CODIR, Sill- SL/ RN)the SL / RN process is applied world wide with capacities raining form 12,000 TPA to 150,000 TPA, Units most of which are in operation.

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  • Optimization of air distribution in direct reduction ...

    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 Pontryagin's continuous maximum principle. The optimum air distribution has been obtained for given operating conditions.

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  • use of fines for sponge iron production in coal based ...

    Today India stands as the largest producer of coal based sponge iron through rotary kiln process using calibrated ore and non coking coal. However, Rotary kiln process suffers from serious limitations like low productivity and pollution. In this respect fixed bed Tunnel kiln furnace are evolving as an alternative to Rotary kiln process.

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  • cement rotary kiln process crusher for sale

    coal based rotary kiln sl rn process – Crusher Machine For ... Crusher Machine For Sale. ... ( coal based rotary kiln sl rn process), mill, crusher, mobile crushing plant, processing equipment, according to the specific needs of our design and production lines, fully the interests of customers.

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  • PRESENT STATE OF THE SL / RN PROCESS AND ITS …

    101 t OF COAL PERCENTAGE CONSbmPTION % EOUPALENT UP TO THE YEAR 2000 y. 93 Fig. 1 TYPE OF PALS AND RESERVES 3 93 OAS RESOURCES AND CONSUMPTION IN USA Fig. 2 Fig. 3 4. Description of a few SL/RN and Lurgi. rotary kiln plants. 5. Discussion on some problems. 6. The future of the SL/RN Process and its application td Indian raw Materials. 1.

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  • Manufacturer of SPONGE IRON - BHAGWATI POWER & STEEL …

    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.

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  • sl rn natural gas based rotary kiln

    In the standard SL/RN process, iron ore, coal, and dolomite or limestone as desulfurizing agent are charged into a rotary kiln and heated up by a countercurrent gas flow Get Price sl rn lurgi dri process - doestpersonaltrainingnl The Process is basically SL/RN & is coal based The kiln is fired with injection coal and temperature of 1050 C is .

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  • Coal-Based Dr Processes Using Rotary Kilns | Beyond the ...

    Most of the established rotary kiln-based DR processes operate on the principle that the reduction is carried out exclusively by carbon monoxide obtained by the gasification of the fixed carbon content in coal. In the year 1991, SL/RN plants alone produced 0.83 million tons of Direct reduced iron (DRI), accounting for about 56% of the world's ...

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  • rotary kiln process of making sponge iron | Solution for ...

    Sponge iron making is a process in which iron ore lumps … for a rotary kiln coal based sponge iron manufacturing process to be successful it is absolutely … 81224242424010 Advances Rotary Kiln Sponge Iron Plant … Role of Coal in Rotary Kiln Sponge Iron Making Process 6. Quantity of Protective Char 7. Reduction of Iron Oxide 8 ...

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  • Prospects for Coal-based Direct Reduction Process

    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 avoid the significant formation of the kiln rings, their operating temperatures must be maintained in a range from 1,000 to 1,100℃3). As a result, the

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  • ENERGY INTEGRATION IN SPONGE IRON PLANT USING …

    Krupp- Codir Process and TDR Process. 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 …

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  • Coal Based Shaft Furnace

    Adaro Indonesia - Adaro - Positive EnergyWaiting for the next load: Adaro Indonesia is involved in its entire coal supply chain our business processes and reducing costs through better collaboration with all we have reduced our average planned stripping ratio — the number of bank installation of a seventh three-stage crushing facility and ...

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  • Nitrogen in SL/RN direct reduced iron: origin and effect ...

    The SL/RN DRI samples from a kiln cooler had high nitrogen contents (50–250 ppm, depending on particle size), contributing to elevated nitrogen levels in liquid steel produced in the electric arc furnaces.

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  • sponge iron process: July 2010

    2.0 DESCRIPTION OF PROCESS: 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.

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  • sponge iron process

    2.0 DESCRIPTION OF PROCESS: 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.

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  • WELSPUN STEEL LIMITED

    During lite up there is a start up burner at the kiln discharge end which is oil fired to heat up the rotary kiln. To ignite the injected coal from outlet of the kiln. When the desired temp. is reached, Iron ore, coal & lime stone or dolomite are fed from kiln feed end and also coal is injected from from kiln …

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  • coal based sponge iron making process ppt - BINQ Mining

     · The coal based rotary kiln process of making sponge iron is the focus of the present write ... Coal based processes: 1) Rotary kiln processes (SL/RN, Krupp-CODIR, DRC, ... etc. are used while for coal based processes rotary kiln based ...

    [24/7 online ]
  • 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.

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

    2. Coal-based sponge iron process The process of the direct reduction of haematite in a rotary kiln is schematically described in the Fig. 1. Haematite and non-coking coal are fed to the kiln at controlled rates without pre-mixing and the charge moves through the kiln depending upon the rotation speed and inclination of the kiln.

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  • Coal based Direct Reduction Rotary Kiln Process – IspatGuru

    Coal based Direct Reduction Rotary Kiln Process . The coal based direct reduction rotary kiln process was developed for converting iron ore directly into metallic iron without the melting of the materials. The process has the advantage of low capital expenditure and no requirement of coking coal.

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  • sl rn natural gas based rotary kiln

    Mathematical model of the SL/RN direct reduction … rotary kiln as thereactorratherthan a vertical shaft. The importance of this process restsin the fact that the coal, which is preferably noncoking, is used without treatment; and is therefore less ex-pensive than reducing gas which is obtained either by reforming natural gas or by gasifying coal.

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  • coal based rotary kiln sl rn process

    The Process is basically SL/RN & is coal based The kiln is fired with injection coal and temperature of 1050 C is maintained inside the kiln The sponge iron from the kiln is cooled & conveyed to product separation system. Get Price. coal based rotary kiln sl rn process – Crusher Machine For

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