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    A muffle rotary kiln is indirect combustion kiln, it applies to high grade iron ore and mill scale, in the condition of reducing atmosphere and high temperature, the iron ore is reduced and volumn shrink, to become high density of DRI ( HDDRI ). The working temperature is 1150 ℃.....


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    The iron occur in Fe-mineral ores contains impurities of Phosphorus, sulphur and high alkali as well as impregnations of waste rock. To produce a metallurgy treatable concentrate the ore has to be grind for mineral liberation, enriched for concentration and dewatered for transportation.


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    Production Process and technology for direct production of Sponge Iron from Iron Ore fines withough any need of either pelletisation nor sintering is offered adopted Tunnel kiln and Hematite Iron ore fines.


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    Keywords Tunnel kiln Iron ore–coal composite pellets Sponge iron Energy efficiency Carbon utilization efficiency 1 Introduction The tunnel kilns are mostly used by the industries for heating refractory and ceramic products [1, 2]. In the year 1908 use of tunnel kiln started for iron oxide reduction. This process was invented by Sieurin as Hoganas process [3]. In 1954, more kilns …


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    The tunnel kilns are mostly used by the industries for heating refractory and ceramic products [1, 2].In the year 1908 use of tunnel kiln started for iron oxide reduction.


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    We have manufactured tunnel kiln that can produce quality sponge iron from any combination of iron ore fines, iron ore pellets, etc. Our tunnel kiln's reaction time is 42 hours that product superior iron metal.