Technology Analysis on Fluidized Bed Hydrogen Metallurgy at Low Temperature

Low-temperature fluidized bed hydrogen metallurgy was studied by thermodynamics calculation in this paper.Traditional hydrogen metallurgy had the disadvantages of high gas consumption and low productivi- ty.The thermodynamics calculation indicates that under the condition of ore powder preheated,the consump- tions of hydrogen are 6 394 m³ and 3 189 m³,when the gas temperature drop is 100 K and 200 K respectively, while the gas consumptions are 4 367 m³ and 2 195 m³ for the part-hydrogen metallurgy（containing 30% CO）.Accordingly the primary consumption of reducing gas of part-hydrogen metallurgy is less than that of the exclusive-hydrogen metallurgy.Part-hydrogen metallurgy should be developed preferentially considering our gas resource.To reduce the gas consumption,the multistage fluidized bed reactor should be applied and the ore powder should be preheated for fluidized bed hydrogen metallurgy processes.The hydrogen metallurgy process of fast reduction of fine ore at low temperature can improve the gas efficiency and the reduction speed rate remarkably.