Experimental Investigation of Reduction and Melting-separation for Carbon-bearing Pellets
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摘要: 以铁精粉、煤粉和石灰石为主要原料制成含碳球团,进行还原熔分试验,并对渣铁形貌和渣铁分离程度进行分析。结果表明含碳球团还原熔分试验的最优方案是:还原温度1 480℃,配煤量(按wC/wO计算)1.2,还原时间22 min,炉渣二元碱度R21.0。在最优试验方案下,得到的粒铁产品质量指标良好,渣铁分离效果最佳,渣中FeO含量最低,铁收得率高达98.62%。Abstract: The reduction experiment was carried out on carbon-bearing pellets made of iron concentrate,pulverized coal and limestone. Morphology observation and separation degree of slag-metal had been analyzed. Based on these investigations an optimum experimental program for reduction and separation process was obtained as follows: temperature is 1 480 ℃,C/O is 1.2,reduction time is 22 min and binary basicity of slag R2 is 1.0. The optimal experiment scheme resulted in the highest reduction degree and a good quality index of granular iron,and the iron yield reached up to 98.62%.
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Key words:
- carbon-bearing pellets /
- reducation experiment /
- separation of slag-iron /
- granular iron
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