冷固结钛精矿高炉护炉球团制备研究
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代梦博(1994—),男,硕士研究生,主要从事铁矿烧结球团研究。

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TF046. 6

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国家科技支撑计划基金资助项目(2012BAB07B04)


Study on preparation of the pellets for blast furnace lining protection made from cold - bonded titanium concentrate
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    摘要:

    含钛量高的优质氧化球团矿可作为高炉护炉原料。采用冷压成型低温固结工艺,对 TiO2 质量分数约为 36% 的 3 种钛精矿进行球团制备,并将球团炉外冷却试验与焖炉试验结果进行对比分析。结果表明:在 1#矿:2#矿:3#矿的配比为 34.4:27.5:38.1 时,添加剂、黏结剂和水分的质量分数分别为 3.0%、5.0% 和 7.4%,在热处理总时间为 93 min 的焖炉冷却条件下可获得优质的高炉护炉球团矿,其 TFe 和 TiO2 质量分数分别为 25.82% 和 34.10%,还原粉化指数(-3.15 mm)为 4.13%,常温抗压强度为 2776 N/P,热抗压强度为 1882 N/P。该制备工艺降低了黏结剂消耗量,缩短了球团干燥、热处理时间,提高了成品球的机械强度。

    Abstract:

    High-quality oxide pellets with high titanium content could be adopted as raw materials for blast furnace lining protection. Pellets are prepared and researched from 3 titanium concentrates with roughly 36% mass fraction of titanium dioxide, and tests results are compared between pellets cooling outside the furnace and cooling inside the furnace by technique of cold-bonded pelletizing and low temperature consolidation. High-quality pellets for blast furnace lining protection could be obtained under the inside cooling condition of the concentrates proportion of 1#: 2#: 3# is 34.4:27.5:38.1,the mass fractions of additives, binders and moisture are 3.0% ,5.0% and 7.4% respectively, and the total heat treatment time is 93 min. The mass fractions of TFe and TiO2 are 25.82% and 34.10%. The low-temperature reduction powdering rate (-3.15 mm) of pellets for blast furnace lining protection is 4.13% , the compressive strength at room temperature is 2776 N/P, and the thermal compressive strength is 1882 N/P. The consumption of the binder is reduced, the time of pellet drying and heat treatment is shortened, and the mechanical strength of the finished pellets is improved by the preparation technique.

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代梦博,孙彩虹,孟庆民,春铁军,赵强.冷固结钛精矿高炉护炉球团制备研究[J].烧结球团,2020,45(4):41-46

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  • 在线发布日期: 2026-09-11
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