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An Investigation on Reduction and Magnetization of Limonite Using Biomass
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2009
Year
Materials ScienceBiomass UtilizationChemical EngineeringBiomass ConversionIron OreBioenergyReduction MechanismEngineeringPyrometallurgyBioremediationLimonite Using BiomassCokingMagnetic ConversionMineral ProcessingBiomass CharacterizationHydrothermal Processing
The magnetic conversion of limonite from Guangxi Chongzuo and its reduction mechanism were investigated. The effects of technological conditions such as roasting temperature, roasting time, the ratio of limonite and biomass on the mineral magnetization were examined. The results from contrast experiments between the reductants of biomassto lignitic coal showed that limonite was deoxidized at the optimum temperature of 650℃ for 30 min using 15%～20% biomass as reductant, which is lower than over 100℃ by using lignitic coal as reductant. The iron ore processed by using lignitic coal and biomass was chiefly deoxidized to magnetic Fe3O4 and γ-Fe2O3, it easily transformed to iron silicate at high temperatures, leading to negative effect on its magnetic separation.