采用包头地区某褐铁矿粉和无烟煤粉为主要原料配制含碳球团,通过高温直接还原熔分制备珠铁.考察了配碳量、粒度、温度、保温时间对还原和熔分的影响.试验结果表明,温度和保温时间是直接还原和融分效果的主要影响因素.球团配碳量nC/no=1.1,褐铁矿粉和煤粉粒度为小于0.048mm(-320目)在1 370℃保温时间为5min,所得产物还原率高,渣铁分离效果好,并且分离的渣能够自然粉化,有利于进一步筛分得到高品质的珠铁,产品可以作为炼钢原料.
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