不同配矿结构下碱度对生球性能及干燥特性的影响
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吴 建 (1983—), 男,工程师,从事烧结球团相关技术研究。

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TF046.6;X757

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湖北省重点研发计划资助项目 (2022BCA062)


Effect of alkalinity on the properties and drying characteristics of green pellets under different ore blending structures
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    摘要:

    鄂州球团造球原料粒度和 SiO2含量随外购矿种类变化和配矿方案调整波动较大,在生产碱性球团时,需要考虑配矿结构对球团性能的影响。针对上述问题,本研究以 5 种鄂州球团生产用料为研究对象,通过改变造球原料配比与熔剂添加量,调整原料结构与碱度,查明不同配矿结构下碱度对生球性能和干燥特性的影响。结果表明,当 MUSA 精矿占比为 50% 时,生球性能较优,在碱度为 0.8 条件下分别使用石灰石、活性灰和小石粒作为熔剂时,3 种碱度的生球落下强度分别为 6.9、6.4 和 5.9 次 /(0.5 m),抗压强度分别为 23.5、26.0 和 23.2 N/P,爆裂温度大于 450 ℃。当干燥时间为 10 min,各方案碱性生球均干燥完成,干燥速率略慢于自然碱度生球(8 min 左右)。

    Abstract:

    The particle size and SiO2 content of the raw materials for Ezhou pellet production fluctuate greatly with changes in the type of purchased ore and adjustments to the blending scheme. When producing alkaline pellets, it is necessary to consider the impact of blending structure on pellet performance. In response to the above issues, this study focuses on five types of materials used in the production of Ezhou pellets. By changing the ratio of pelletizing raw materials and the amount of flux ore added, adjusting the structure and alkalinity of raw materials, the influence of alkalinity on the performance and drying characteristics of green pellets under different ore blending structures is investigated. The results showed that when the proportion of MUSA concentrate was 50%, the performance of the green balls was better. When limestone,active ash,and small stone particles were used as fluxes under the condition of alkalinity of 0.8, the falling strength of the green balls for the three alkalinity was 6.9,6.4,and 5.9 times/(0.5 m),the compressive strength was 23.5,26.0,and 23.2 N/P,when the drying time was 10 min,the alkaline pellet of each scheme was dried and the drying rate was slightly slower than that of the nature alkaline pellet(about 8 minutes).

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吴 建,周冰致,周 峰,张汉泉,路漫漫.不同配矿结构下碱度对生球性能及干燥特性的影响[J].烧结球团,2024,(4):63-69

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  • 最后修改日期:2023-08-21
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  • 在线发布日期: 2026-08-27
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