direct reduction of iron ore from tunnel kiln process

process of iron reduction in tunel kin and rotary kiln

direct reduction of iron ore from tunnel kiln process. In the conventional process of Tunnel Kiln Process the Iron Ore and Coal are fed in the Crucibles or Saggars of Silicon Carbide and Loaded on the Trolleys circular tunnel kiln Inside the RHF direct reduction of iron ore or ironbearing byproducts occurs using coal. More Detail

This invention relates to a method for direct reduction of oxidized chromite ore fines (0 to 4.0 mm) composite agglomerates in a tunnel kiln to produce one of a reduced and agglomerates for use in

Direct reduction of iron is the removal of oxygen from iron ore or other iron bearing materials in the solid state, i.e. without melting, as in the blast furnace. The reducing agents are carbon monoxide and hydrogen, coming from reformed natural gas, syngas or coal. …

effect of coal levels during direct reduction roasting of

May 01, 2012 · The length, height, and width of the tunnel kiln were 167, 5.5, and 2.34 m, respectively. This tunnel kiln was being used to produce direct reduction iron from iron scale at the same time. Mixed materials pass through three stages in the tunnel kiln: 12 h preheat; 12 h constant heat; and, 25 h cooling

The basis of the direct reduction process is that solid sponge iron is produced by removing oxygen from the ore in a shaft furnace, rotary kiln furnace or fluidised bed. Sponge iron can be produced in the form of Direct Reduced Iron (DRI), Hot Briquetted Iron (HBI) and Cold Briquetted Iron (CBI); also Low Reduced Iron (LRI), which is pre-reduced iron ore with a reduction and metallisation degree lower than that for …

Process Description R&D Trends. In a direct reduction process, lump iron oxide pellets and/or lump iron ore, are reduced (oxygen removed) by a reducing gas, producing direct reduced iron (DRI). If the cooling stage is omitted, the DRI can be immediately briquetted into hot briquetted iron (HBI)

direct reduced iron tunnel kiln pakistan

Preference of Steel as a Material of Construction Employee education and training PERED Technology for Direct Reduced Iron Production Alumina and its Role in Iron The Direct Reduction of Iron Treatise on Process case group tunnel kiln sponge iron manufacturers india iron ore blue dust effect in rotary kiln…

tunnel kiln process sponge iron in india. Direct Reduced Iron Tunnel Kiln reduction reaction in tunnel kiln process for iron ore IronManufacturing process related to the specified manufactures iron powder using magnetite ore Fe3O4 and carbon as materials The reduction process takes place in a gas fired tunnel kiln at around 1200176C for 60 hours refined by oxidation reactions in

CN1804049A - Tunnel kiln without exterior combustion chamber and production of direct reduced iron by composite tunnel kiln - Google Patents. The relates coal-base direct reduction process for

tunnel kiln and iron powder reduction

By using tunnel kiln to produce DRI is that mix the iron ore concentrate pulverized coal and limestone powder with certain proportion and feed into material drum for being reduction and then put these drums on the kiln car and pushed it into the tunnel kiln when the material drum is heated to 1150 for reduction and cooling iron ore concentrate will be reduction and get the direct reduced iron

Mar 16, 2013 · Fig 2 Principle of direct reduction process. Gas based process. In the gas based reduction processes, a vertical shaft kiln is used in which iron ore is fed into the top of the kiln and finished sponge iron is drawn off from the bottom after cooling it so as to prevent its re-oxidation

Reduction Reaction In Tunnel Kiln Process For Iron Ores. process for direct reduction of iron ore, and every major steel producer in the. the blast and to provide good contact with the air for the chemical reactions ore in a vertical shaft furnace, a rotary or tunnel kiln, or other types of hearth or

tunnel kiln process for sponge iron

Direct Reduction Of Iron Ore From Tunnel Kiln Process We are a high-end mining machinery manufacturer in Asia. The main production equipment includes crusher, sand making machine, ball mill, Raymond mill, cement equipment and other products

Tunnel Kiln Industrial Equipment For Direct Reduced Iron. Direct reduced iron by tunnel kiln coal crushing plant coal based sponge iron plant silicon carbide tunnel kiln coal based tunnel kiln technology for making iron on direct reduced iron technology we mainly popularize rotary kiln kiln technology is fit for various of high grade or low grade iron ore and contact us sponge iron production

tunnel furnace spong iron. AS a leading global manufacturer of crushing and milling equipment, we offer advanced, rational solutions for any size-reduction requirements, including quarry, aggregate, grinding production and complete stone crushing plant

reduced iron tunnel kiln - hitlers hollywood

direct reduction of iron ore from tunnel kiln process. By using tunnel kiln to produce DRI is that mix the iron ore concentrate pulverized coal and for reduction and cooling iron ore concentrate will be reduction and get the direct reduced iron The process characteristics of Tunnel kiln method

Feb 13, 2015 · Reduction of iron ore coal composite pellets in tunnel kiln emerges with an edge over all other systems studied. Performance parameters like percentage metallic iron formed, percentage metallization, reduction efficiency, carbon utilization efficiency, energy efficiency have been calculated and found to be significantly higher for composite pellets than the other systems studied