sponge iron production from ore -coal composite pellets in tunnel kiln2 Indian Institute of Technology, Kharagpur – 721302, India. Abstract: Today India . products [1-2]. In the year 1908 use of tunnel kiln started for iron oxide reduction. This . the first part and direct air cooling in the last part. Some kilns use.direct reduced iron technology in tunnel kiln,Iron Recovery from Discarded Copper Slag in a RHF Direct . - MDPINov 3, 2016 . University of Science and Technology Beijing, Beijing 100083, China; . recovery, smelting reduction for iron recovery [6,7], and direct . The tunnel kiln features a low capacity, high energy consumption, and a severe.technological practice of direct reduction iron ore concentrate by coalKey words: Ore, concentrate, sponge iron, gas furnace, tunnel type furnace,. Goal: To extract direct reduced iron (DRI) from iron ore concentrate using coal.
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