高硅助熔剂球团在固结过程中的相变机制

IF 1.7 3区 材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING Ironmaking & Steelmaking Pub Date : 2022-11-22 DOI:10.1080/03019233.2022.2144400
Li-ming Ma, Jian-liang Zhang, Yao-zu Wang, M. Lu, Qiu-ye Cai, Chen-yang Xu, Zhuo Li, Zheng-jian Liu
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引用次数: 0

摘要

摘要深入研究高硅熔球团矿的固结行为,将有助于开发适合中国资源结构的高比例球团冶炼工艺。以石灰、熟石灰和石灰石为含钙添加剂制备高硅熔剂球团,适宜的含钙添加剂为石灰和石灰石。与酸性球团相比,高硅熔剂球团的适宜预热温度更高(1100°C)。预热过程中的相变主要包括CaCO3和Ca(OH)2的热分解以及固相之间的反应。高硅熔剂球团的焙烧温度应控制在较小范围内(1250°C–1280°C)。焙烧过程中的相变主要表现在液相的生成和迁移。Fe2O3固结、孔隙分布规律和液相形成共同决定了球团的固结特性。
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Phase transition mechanism of high-silica fluxed pellets during consolidation
ABSTRACT An in-depth study of the consolidation behaviour of high-silica fluxed pellets will help promote the development of a high-proportion pellet smelting process suitable for China’s resource structure. Lime, slaked lime, and limestone were used as calcium-containing additives to prepare high-silica fluxed pellets, and the suitable calcium-containing additives were lime and limestone. Compared with acid pellets, the suitable preheating temperature of high-silica fluxed pellets is higher (1100°C). The phase transformation during preheating consists mainly of the thermal decomposition of CaCO3 and Ca (OH)2 and the reaction between the solid phases.The roasting temperature of high-silica fluxed pellets should be controlled within a small range (1250°C–1280°C). The phase transition during the roasting of mainly lies in the generation and migration of the liquid phase. The Fe2O3 consolidation, the pore distribution law, and the liquid phase formation jointly determine the consolidation properties of the pellet.
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来源期刊
Ironmaking & Steelmaking
Ironmaking & Steelmaking 工程技术-冶金工程
CiteScore
3.70
自引率
9.50%
发文量
125
审稿时长
2.9 months
期刊介绍: Ironmaking & Steelmaking: Processes, Products and Applications monitors international technological advances in the industry with a strong element of engineering and product related material. First class refereed papers from the international iron and steel community cover all stages of the process, from ironmaking and its attendant technologies, through casting and steelmaking, to rolling, forming and delivery of the product, including monitoring, quality assurance and environmental issues. The journal also carries research profiles, features on technological and industry developments and expert reviews on major conferences.
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