Case Studies in Thermal Engineering, 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 ,Alternative Iron making processess, Jan 18, 2014· Possible Solutions Direct Reduced Iron (DRI) Reduction of ferrous oxide in solid state SL/RN, MIDREX, ITmk3 etc Smelting Reduction of Iron COREX, FINEX, Hismelt etc using non-coking coal Obviating the need for coke oven batteries and sinter plants 5 6Quality requirements of iron ore for iron production ,, Jan 01, 2015· 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 processMathematical 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 variabl 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 ,DRC | Downstream Consulting Pty Ltd, Lump ore or pellets, coal and limestone (used as a desulfurizing agent) are fed into the feed end of a refractory lined rotary kiln which is sealed at both ends Air for coal combustion is added axially to the kiln through tubes mounted along the length of the kiln Coal is ,.
Thermal kiln, The SL/RN process was developed in the early 1960s by Outotec in collaboration with three US compani 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 ,DESIGN OF WASTE HEAT RECOVERY SYSTEM IN A SPONGE ,, Sponge iron is produced by direct reduction of iron ore (DRI process) and is popular because of use of non-coking coal , 2141 SL/RN Process 2142 Codir Process 2143 Accar 2144 TDR Process , promising availability of coal, the coal based sponge iron plants share the major amount of its production At present, there are 118 large ,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 kilnsponge iron process, Jul 29, 2010· Lump iron ore in the size range of 5-20mm can be used in all coal based rotary kiln process In gas based processes 70% iron ore pellets and 30% lump iron ore of 10-30mm are being used In general high grade iron ore of 65% minimum Fe (total) with less decrepitating characteristics is preferred for use in rotary kilnClosed crucible reduction of lump powdered mill scale or ,, Sep 01, 2020· The reduction mechanism could be understandable from the Fig 10 of partially reduced single mill scale or iron ore particle during the coal-based direct reduction process Download : Download high-res image (243KB) Download : Download full-size image; Fig 10.
MAKING OF IRON NUGGET FROM CONCENTRATED IRON ,, technology that based on coal asa reducing agent to produce pig iron in the form of nuggets Such a technology employs a rotary kiln that consumes less energy than other furnac In this study, reduction process of iron sand concentrates with coal as the reductant was accomplished ina mini- sized rotary kiln(06 m diameter and 6 m length)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]WELSPUN STEEL LIMITED, Now the coal if the desired temp for reduction process is obtained , iron ore with dolomite is fed from inlet of the kiln Since the kiln has a downward slope of 25% from the feed end side to discharge end side, its rotation causes the iron ore & coal to mix and travel through the systemPanel: DRI technologies optimisation and evolution, where ,, DIRECT REDUCED IRON ( DRI/HBI ) coal-based gas-based ----- ----- Rotary Rotary Fluid Shaft Fluid Kiln Hearth Bed Furnace Bed , fines lump ore SL/RN Inmetco Circofer Midrex FINMET DRC Fastmet HyL Iron Carbide others Circored Fluid Bed Processes ,SL/RN Process | Industrial Efficiency Technology & Measures, 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.
STATE OF THE DIRECT REDUCTION AND REDUCTION ,, Direct reduction is defined as a process of producing solid iron product out of small-grain ore, lump ore or pallets, applying natural gas or coal-based reducing agents at relatively low temperatures ie at around 1000OC There are two different types of direct reduction processes: a) processes based on solid reducing agents,Flow and Mass Transfer in the Furnace for Gas, products are iron pellets and lumps with high quality The main gases used for the reduction of iron oxides to iron are CO 2 /CO and H 2While Hydrogen is used as reactive gas Hydrogen and Carbon dioxide/carbonmonoxide can be used as the combination of the gases as well (H 2 +CO) in direct reduction of iron oxideREDUCTION OF IRON ORES USING NON, Non-coking coal as reduction agent for direct reduction processes , SL/RN and Krupp sponge iron processes The principle of the rotating cylindrical furnace process is that lump, pelletized, or agglomerated iron ore is mixed with lump or fine carbon belrers; heating is normally effected on the counter-flow principle toBB Agrawal, Title: Microsoft PowerPoint - BB Agrawal-IIM-Delhi-130211ppt Author: Gur Iqbal Created Date: 2/22/2011 1:43:57 PMDirect reduction and beneficiation of a refractory ,, It is shown that the final sponge iron powder, assaying 9240% of Fe and 9228% of metallisation degree, was manufactured with iron recovery of 9660% under the following conditions: reducing siderite lump sample with 4062% Fe and the particle size between 8 and 10 mm at 1050°C for 100 min and carbon to iron ratio of 23.
Iron ore value chain, Lower grade iron ores and alternative iron bearing raw materials (Titanium-Vanadium-Magnetites, iron sands, residues) can best be treated in smelting furnac Outotec offers both electric smelting furnaces and AusIron, a coal based smelting reduction process producing hot metal similar to a blast furnace hot metal for further processingDirect, Jan 05, 2012· 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 processSeminar on HYL Process, Reductant Natural Gas,Gassified Coal DRI/HBI/HDRI Gas Based Process Technology Shaft Furnace (Moving Bed) 1 Midrex 2 HYL-III 3 NSC 4 Iron carbide 5 Ghaem 6 Circored Reductant Non-Coking Coal DRI Technology Kiln Process 1 Krupp Rein 2 Krupp CODIR 3 SL/RN ,IRON AND STEELMAKING SLAGS: ARE THEY HAZARDOUS ,, Based on these results, some countries have classified iron and , Lump ore Fine ore Coal SF (MIDREX, HyL) (Fastmet, Inmetco, ITmk3) RK (SL/RN, Krupp-Codir, DRC,ACCAR/ OSIL, TDR, ,KINETICS OF IRON ORE REDUCTION BY COAL AND ,, KINETICS OF IRON ORE REDUCTION BY COAL AND CHARCOAL , advantageous position for coal/charcoal based sponge iron plants The total gross reserves of coking coal and non-coking coal in India are approximately 11,602 and 71,400 million ton India is one of the unfortunate countries, which does not have good quality of , (SL/RN, Krupp-CODIR, DRC,.
BHAGWATI POWER & STEEL LIMITED, Direct reduction processes can be broadly classified into to groups based on the type of the reluctant used namely solid or gaseous There are two well-established processes for the manufacture of sponge iron, namely The reformed natural gas process ie by the gaseous reduction of the iron ore Coal based Rotary Kiln process - Solid ReductionSeminar on HYL Process, Dec 23, 2013· Reductant Natural Gas,Gassified Coal DRI/HBI/HDRI Gas Based Process Technology Shaft Furnace (Moving Bed) 1 Midrex 2 HYL-III 3 NSC 4 Iron carbide 5 Ghaem 6 Circored Reductant Non-Coking Coal DRI Technology Kiln Process 1 Krupp Rein 2 Krupp CODIR 3 SL/RN (Outocompu) 4 ACCAR 5 DRC 62G Direct Reduction, The SL/RN process, which utilizes rotary kiln to reduce lump ore, pellets and sand iron with coal, is in commercial production This process suffers, however, from relatively big heat loss and facility size, and hence finds limited acceptance of 2 million tons/yearSL/RN | Middle East Steel Industry, Suspended Hydrogen Reduction of Iron Oxide Concentrates This technology will require ~ 38% less energy than the blast furnace process or 74 GJ/ton of hot metal Even when natural gas or coal is used significant reduction in carbon dioxide emissions 39% and 69% of ,DRI production | International Iron Metallics Association, Direct reduction processes for iron Illustrations of the principal processes are shown below The Midrex® and Energiron gas-based processes use predominantly iron ore pellets as feedstock, but sometimes with inclusion of lump ore in the furnace charge The SLRN coal-based process uses lump ore and, increasingly, pellets as feedstock.