Research on the Process of Iron-Bearing Dust's Self-Reduction to Produce Iron Nuggets
Research on the Process of Iron-Bearing Dust's Self-Reduction to Produce Iron Nuggets
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DOI：
10.4028/www.scientific.net/amr.746.505
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发表时间：
2013-08
期刊：
影响因子：
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通讯作者：
E. Tang;Xueming Liang;Ju Li;Qiang Zhou
中科院分区：
文献类型：
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作者：
E. Tang;Xueming Liang;Ju Li;Qiang Zhou
在常温下将含铁粉尘与煤按不同比例混合压制成球团。研究了球团矿在碳管炉中自还原后，碳氧比、炉渣碱度、温度对渣金两相分离行为、金属化率、脱磷脱硫率的影响。结果表明，当炉渣碱度大于1.8时，自还原产物能自发析出。渣铁分离的最佳内碳氧比为1.1，渣碱度为2.0。在此工艺条件下，在1350°C以上的温度下，产品的铁收得率大于95%，5~ 20 mm的铁块率大于80%，脱硫率大于85%。
Under normal temperature iron-bearing dust was mixed with coal and compacted to form pellets as per different ratio. After pellets were self-reduced in carbon tube furnace, the influence of C/O ratio, slag basicity, temperature on the separating behavior of metal phase from slag phase, metallization rate, dephosphorization and desulphurization rate was studied. The results indicate that self-reduced products can spontaneously separate when slag basicity is more than 1.8. The optimum inner ratio of C/O and slag basicity for complete separation of iron and slag is 1.1 and 2.0 respectively. Under those conditions and temperature at above 1350°C, such results that product can reach: iron yield is more than 95%, iron nuggets within size of 5~20mm is more than 80% and desulphurization rate is more than 85%.