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Migration and Reaction Mechanism of Barium in BaSO4–CaCO3–Fe2O3 System during Sintering
Steel Research International ( IF 1.9 ) Pub Date : 2023-05-12 , DOI: 10.1002/srin.202200926
Sida Li 1 , Jianliang Zhang 1 , Yaozu Wang 2 , Lele Niu 1 , Fenglin Lu 3 , Tengfei Wang 1 , Zhengjian Liu 1
Steel Research International ( IF 1.9 ) Pub Date : 2023-05-12 , DOI: 10.1002/srin.202200926
Sida Li 1 , Jianliang Zhang 1 , Yaozu Wang 2 , Lele Niu 1 , Fenglin Lu 3 , Tengfei Wang 1 , Zhengjian Liu 1
Affiliation
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With the increasingly strict requirements of blast furnaces on the sinter quality, analyzing the phase transition process and reaction mechanism of special elements in the sintering process plays an important role in understanding the sintering process and improving the sinter quality. Herein, the decomposition process of barite during sintering and the influence mechanism on the bonding phase of calcium ferrite are studied by laboratory experiments and thermodynamic calculations. The results show that calcium ferrite and ferric oxide can promote the decomposition of barite and reduce the decomposition temperature in the sintering process. The generated barium enters the calcium ferrite phase and affects the strength and melting point of calcium ferrite. With the increase of barium content, the strength of calcium ferrite sample increases from 1.62 to 2.00 kPa, and the initial melting temperature of calcium ferrite sample stays at 1473 K. However, with the further increase of barium, the sample strength and melting temperature both show a worsening trend. Finally, based on the research results, some suggestions for sintering production are put forward, and the optimal barite content is determined. Results help to better understand the reaction process and action mechanism of barium in the sintering process.
中文翻译：
BaSO4-CaCO3-Fe2O3体系中钡在烧结过程中的迁移及反应机理
随着高炉对烧结矿质量的要求日益严格，分析烧结过程中特殊元素的相变过程和反应机理对于认识烧结过程、提高烧结矿质量具有重要作用。本文通过室内实验和热力学计算研究了重晶石在烧结过程中的分解过程以及对铁酸钙结合相的影响机制。结果表明，铁酸钙和三氧化二铁在烧结过程中可以促进重晶石的分解，降低分解温度。生成的钡进入铁酸钙相并影响铁酸钙的强度和熔点。随着钡含量的增加，铁酸钙样品的强度从1开始增加。62~2.00 kPa，铁酸钙样品的初始熔化温度保持在1473 K。但随着钡含量的进一步增加，样品强度和熔化温度均呈现恶化趋势。最后，根据研究结果，提出了烧结生产的建议，并确定了最佳的重晶石含量。研究结果有助于更好地理解钡在烧结过程中的反应过程和作用机制。
更新日期：2023-05-12
中文翻译：
BaSO4-CaCO3-Fe2O3体系中钡在烧结过程中的迁移及反应机理
随着高炉对烧结矿质量的要求日益严格，分析烧结过程中特殊元素的相变过程和反应机理对于认识烧结过程、提高烧结矿质量具有重要作用。本文通过室内实验和热力学计算研究了重晶石在烧结过程中的分解过程以及对铁酸钙结合相的影响机制。结果表明，铁酸钙和三氧化二铁在烧结过程中可以促进重晶石的分解，降低分解温度。生成的钡进入铁酸钙相并影响铁酸钙的强度和熔点。随着钡含量的增加，铁酸钙样品的强度从1开始增加。62~2.00 kPa，铁酸钙样品的初始熔化温度保持在1473 K。但随着钡含量的进一步增加，样品强度和熔化温度均呈现恶化趋势。最后，根据研究结果，提出了烧结生产的建议，并确定了最佳的重晶石含量。研究结果有助于更好地理解钡在烧结过程中的反应过程和作用机制。
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