amalgamation which, in 1964, led to SL-RN process, For the development of the process upto the present state, three pilot plants have been erect-ed and operated and several commercial plants are already in operation or are in the state of erection. The SL-RN process also uses rotary kiln for reducing iron ore. The plant, as shown in Fig.

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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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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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Coal Burner For Rotary Kiln. Coal Based Rotary Kiln Sl Rn Process Crusher Machine For. Ferronickel Rotary Kiln Refractory Products. Dolomite Process Crushed Size Rotary Kilns From Tanzania. Dolomite Rotary Kiln China Henan Zhengzhou Mining. High Capacity Rotary Kiln For Kaolinceramsitemetallurgy. Hina Durable Rotary Kiln For Limonite Ore ...

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Coal-based Direct Reduced Iron making plant through Rotary Kiln(SL/RN Process) with versatile des... Know more . Turnkey . Turnkey project handling capabilities with various specializations in delivering end-to-end solut... Know more . Rolling .

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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.

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SL/RN Process. 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.The advantage of this technology is its robustness and the potential to use ...

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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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SL/RN Process. 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.The advantage of this technology is its robustness and the potential to use ...

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kiln coal based processes such as the Stelco–Lurgi/ ... (SL/RN) rotary kiln process. 1. In this. process,, 1? 5t o n s o f l u m p o r e (2 31? 5 z 3? 15 mm), 800 kg of coal and 40 kg of ...

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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.

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Several processes based upon the direct reaction of coal and iron ore in a rotary kiln, such as the SL/RN process, have reached various stages of development since the 1960s. 20 Due to the high gangue and low specific productivity of these processes, they have not received a great deal of attention for commercial production. Several processes ...

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SL/RN is the most widely accepted coal based DR process. It was jointly developed by Stelco, Lurgi Chemie, Republic Steel Company and National Lead Corporation in 1964. In this process, the materials charged into the kiln gravitate towards the discharge end during which they are progressively heated to the temperature of reduction of around ...

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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 ...

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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. The optimum air distribution has been found to have a definite pattern with small changes due to variation in process conditions.

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Investment and operational costs of the process are reported to be $344.4 and $183.1 per ton of steel, based on a scrap cost of $120/t-scrap (US DOE, 2003. p. 4/4.) Commercial: Waste Heat Recovery for Rotary Kiln Direct Reduction: The coal consumption is about 800 kg/t DRI.

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Investment and operational costs of the process are reported to be $344.4 and $183.1 per ton of steel, based on a scrap cost of $120/t-scrap (US DOE, 2003. p. 4/4.) Commercial: Waste Heat Recovery for Rotary Kiln Direct Reduction: The coal consumption is about 800 kg/t DRI.

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Operation of Coal-Based Sponge Iron Rotary Kiln to Reduce Accretion Formation and Optimize Quality and Power Generation. ... and highly reducible pellets are most suitable for the SL/RN process ...

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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 (50-250ppm, depending on particle size), higher than DRI from gas-based reduction. The higher nitrogen content of SL/RN DRI would increase the

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About. 32years of experience in Sponge Iron, Steel and Power Industry. Coal based Rotary Kiln Process for DRI (Sponge Iron) making is the speciality as success in return. Product development with best economy. Power Generation though Waste Heat and Varied Fuels. Proven and safe practices to achieve best PLF is always in top strategy list.

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Coal based DRI plant. Rotary Kiln with SL/RN Process; Melting. Electric Arc Furnace; Induction Furnace; Power Supply Unit; Refining. Electrotherm (Ladle) Refining Furnaces; Metal Refining Konverters (AOD) Continuous Casting. Multi-Radius Bullet Caster; Modular Caster;

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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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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 of the kiln to supplement the heat availability. The model is based on material and energy conservation principles, and the ...

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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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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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The coal based rotary kiln process combines the Republic Steel-National Lead (RN) process developed in 1920s for beneficiating low grade ores, and the Stelco-Lurgi (SL) process conceived in the early 1960s for producing high-grade DRI.

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The SL/RN process was developed in the early 1960s by Outotec in collaboration with three US companies. Benefits 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.

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The basic principle of the SLRN 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 In the traditional SLRN process iron ore. View Details Send Enquiry Sl Rn Natural Gas Based Rotary Kiln

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SL/RN technology is a coal based rotary kiln direct reduction process ... Chat Online; Rotary Kiln Process of Making Sponge Iron C. Rotary Kiln Process of Making Sponge Iron// 13 that the entire production by number 2, 3 and 4 countries is through gas based route while in …

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Prakash Industries Ltd., is producing Sponge Iron from Rotary Kilns based on SL/RN technology of Lurgi, Germany.. The technology is coal based and the waste gases of the Rotary Kilns are utilized for generation of power in Power Cogeneration plant. The whole process of manufacturing Sponge iron ( DRI) is environment friendly with provision of ...

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