南非块矿与PB块矿质量对比分析

矿石的化学成分、物理性能和冶金性能分析表明,PB块矿与南非块矿相比,含铁品位相当,SiO2、Al2O3、S和碱金属含量低,但P含量高,烧损大;PB块矿的粒度、冷热强度均不如南非块矿;PB块矿还原性明显优于南非块矿62.7%。鉴于PB块矿的性能,建议高炉使用时将PB块矿布在高炉中心,减少低料线操作,采取矿焦混装等措施,以改善料柱透气性。

Quality Comparison and Analysis between South Africa Ore and PB Ore

The analysis by ore chemical composition, physical properties and metallurgical performance showed that the PB ore compared with South Africa ore has high iron grade, SiO2, Al203, S and alkali metal content are low, but the content of P is high; The granularity, cold and hot strength of the PB ore are not better than South Africa ore; But the reductibility of the PB ore is better than the South Africa ore. In view of the performance of the PB ore, it is suggested that the ore should be distributed at the center of the blast furnace, reduce low stock line operation, mix the ore and coke together so that improve the vapor permeability of stock column.