Cinética da redução de ferrita de zinco por misturas co-co2

An important problem of steelmaking, arising from the use of scraps in steel industries are the recovery of metals contained in the dust and sludge produced in electric arc furnaces (EAF) and LD converters / FOB.About 10 to 20 kg of dust per ton of steel are generated in EAF, which are considered hazardous wastes by the environmental controlling agencies (Class I -hazardous materials / NBR).Several processes using different technologies (pyrometallurgical and hydrometallurgical), has been used in trying to recover mainly Fe and Zn contained in these wastes, focusing on both technical and economic aspects.In this context, theoretical and phenomenological researches are being conducted.The present study focuses the reduction of zinc ferrite produced in laboratory, using pure CO and CO-CO2 mixtures.The phenomenology is supported by a prior decomposition of zinc ferrite followed by simultaneous reductions, and the significant effecs of the temperature, time and %CO.