某进口镜铁精矿的配矿及冶金性能试验研究
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刘 震(1997—),男,硕士研究生,从事烧结高温基础特性方面的研究。

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TF046.4

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湖南省自然科学基金资助项目(2020JJ5726)


Experimental research on ore blending and metallurgical properties of an imported specularite concentrate
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    摘要:

    某进口镜铁精矿铁品位高达65%以上,产量稳定、有害杂质低、性价比高,如能大量利用可缓解优质铁精粉短缺的压力。为此,本文以我国钢铁企业中常见的烧结配矿方案,开展该矿的配矿及冶金性能试验的研究。试验结果表明:在常规的配矿方案中,此镜铁精矿配入 10%~26%,烧结性能和冶金性能均良好;当该精粉取代 10% 的同类型常用进口精粉时,烧结机利用系数由 1.37 t/(m2·h)大幅提高至 1.47 t/(mm2·h),转鼓强度由 62.67%增加至 63.47%;若该精粉配入 26%,取代进口精粉和巴西某粗粉时,其利用系数基本保持不变,但转鼓强度大幅增加至 67%左右,可显著改善烧结矿的强度。对不同配矿成品烧结矿的冶金性能进行分析,结果表明其还原度(RI)和还原粉化(RDI+3.15mm)分别为 78%和 63%左右,均能满足高炉冶炼需求。在烧结工业试验中,生产数据表明配加 10%的该镜铁精矿可大幅降低烧结生产的混匀矿成本,且可显著改善 450 mm2 烧结机的生产效果。

    Abstract:

    An imported specularite concentrate has an iron grade of more than 65%, stable output, low harmful impurities, and high cost performance. If it can be used in large quantities, it can alleviate the pressure of shortage of high-quality iron powder. For this reason, the common sintering ore blending scheme is used in China's iron and steel enterprises to carry out the research on the ore blending and metallurgical performance research of the ore. The results show that in the conventional ore blending scheme, the specularite concentrates is blended with 10%~26%, and the sintering performance and metallurgical properties are good; when the refined powder replaces 10% of the same type of commonly used imported refined powder, the sintering machine utilization factor is greatly increased from 1.37 t/(m2·h) to 1.47 t/(m2·h), and the drum strength is increased from 62.67% to 63.47%; when the refined powder is blended with 26% to replace imported refined powder and a certain coarse powder from Brazil, its utilization factor remains basically unchanged, but the drum strength is greatly increased to about 67%, which can significantly improve the strength of sinter. Analysis of the metallurgical properties of the finished sinter with different blends shows that the degrees of reduction (RI) and reduction pulverization (RDI+3.15mm) are respectively about 78% and 63%, both of which can meet the demand of blast furnace smelting. In the sintering industry test, the production data shows that adding 10% of the specularite concentrate can greatly reduce the blending ore cost of sintering production, and the production improvement effect of the 450 m2 sintering machine is more significant.

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刘 震,蒋丽荣,文小平,周荣宝,李义民.某进口镜铁精矿的配矿及冶金性能试验研究[J].烧结球团,2021,46(6):34-42

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  • 最后修改日期:2021-05-18
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  • 在线发布日期: 2026-09-06
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