Reduction of Zn-Bearing Dust Using Biomass Char

BiocharBiochar is a carbon-neutral fuel that can be used in the iron and steel industry. The reduction behavior of Zn-bearing dustZn-bearing dust using various reductants was compared. Thermodynamic analysis confirmed that the reduction of Fe and Zn followed the carbothermal reductionCarbothermal reduction mechanism. The results indicated that regardless of the reductant used, the Fe metallization and Zn removal achieved a high level of approximately 95% and over 99%, respectively. However, the removal of K showed variability among the reductants, with removal ranging from 55.36 to 92.98%. The Na removal proved to be more challenging, with removal ratios of less than 20% achieved using all the reductants. CSC and BC exhibited higher volatile contents compared to other reductants, and biocharBiochar had a higher reactivity compared to CDQ and TC. The FCad contents of CDQ and TC were higher than other reductants, and FCad was proved beneficial for the removal of K and Na.