杭州钢铁厂竖炉球团矿自1970年投产以来,逐渐成为高炉的主要原料之一,入炉率由10%、20%到目前达到50%(见表1),个别时期球团用量达60～70%。高炉自使用球团矿以来,反映良好,高炉操作顺行,未见异常征兆,并且在实践中摸索出冶炼低矽铁的一些经验。认为球团是一种好炉料,特别是近几年根据客观条件,改 Hangzhou Iron and Steel Plant shaft furnace pellet since its commissioning in 1970, has gradually become one of the main raw material blast furnace, into the furnace rate from 10%, 20% to 50% at present (see Table 1), the amount of individual pellets reached 60 ~ 70%. Since the use of pellets blast furnace, reflecting the good, blast furnace operation along the line, no abnormal signs, and in practice found out some of the experience of smelting low-iron. That the pellet is a good charge, especially in recent years based on objective conditions, change