The present study explores the application of biomass briquette, produced from the unutilized vegetative remnants, as an alternative reductant for the reduction roasting-magnetic separation of an iron ore slime sample assaying 56.2% Fe. The X-Ray Diffraction (XRD) studies indicated tridymite and quartz to be the only crystalline mineral phases present in the biomass briquettes while the Fourier Transform Infra Red (FTIR) spectra identified several organic functional groups representing the biomass. Iron ore concentrates with ∼65% Fe and ∼64% weight recovery were obtained with reduction conditions such as temperature: 650–750 °C, reductant to feed ratio: 0.15, reduction time: 30–45 min and reductant size: −3+1 mm. The analysis of the statistically designed experiments suggested that temperature is the most crucial factor followed by time, reductant to feed ratio and reductant size. Magnetite and hematite were found to be the only major phases present in the magnetic fractions produced from roasting at the optimum conditions. Many feebly magnetic phases like wustite, fayalite and clinoferrosilite appeared at higher temperature and reductant to feed ratios, which was confirmed by XRD, reflected light microscopy and quantitative mineralogical analysis.

本研究探索了由未利用的植物残渣产生的生物质团块的应用，作为一种替代还原剂，可减少铁矿泥样品中56.2％Fe的还原焙烧-磁分离。X射线衍射（XRD）研究表明，鳞石英和石英是生物质团块中仅有的结晶矿物相，而傅立叶变换红外（FTIR）光谱确定了代表生物质的几个有机官能团。在还原条件下，例如温度：650-750°C，还原剂与进料比：0.15，还原时间：30-45 min，还原剂尺寸：-3+，获得铁精矿含铁约65％，重量回收率约64％。 1毫米 对经过统计设计的实验进行的分析表明，温度是最关键的因素，其次是时间，还原剂与进料的比例和还原剂的尺寸。发现磁铁矿和赤铁矿是在最佳条件下焙烧产生的磁性馏分中仅有的主要相。X射线衍射，反射光显微镜和定量矿物学分析证实了许多微弱的磁性相，如铁矾石，铁橄榄石和斜铁硅铝石在较高的温度和还原剂与进料的比率出现。