Review of Research Progress on Dry Granulation Technology for Blast Furnace Slag

作者：Hong‐Ying Hu, Tuo Zhou, Ye Li, Bing Xia, Man Zhang, Nan Hu, Hairui Yang · 发表于：Materials · 年份：2025 · DOI：10.3390/ma18122802 · 被引用次数：3 · 研究领域：Metallurgical Processes and Thermodynamics、Iron and Steelmaking Processes、Bauxite Residue and Utilization

Blast furnace slag, a high-temperature molten by-product generated during the ironmaking process in the metallurgical industry, has garnered significant attention for its resource utilization technologies. Compared to the traditional water-quenching method, dry granulation offers notable advantages. This paper systematically compares and analyzes the performance parameters of three typical dry treatment processes: mechanical crushing, air-quenching granulation, and centrifugal granulation. It reveals that the centrifugal granulation process demonstrates substantial technical superiority in key metrics, such as particle size distribution uniformity, particle morphology optimization, and heat recovery efficiency. Building on this, this study provides a comprehensive review of the current state of centrifugal granulation technology, from both experimental and simulation perspectives. Additionally, the combined processes of centrifugal granulation and air quenching can fully exploit the synergistic benefits of each technology, thereby enhancing overall efficiency. However, the wind's cooling effect can lead to the premature solidification of molten slag when it splits into liquid filaments, resulting in slag wool. To address this, this paper proposes a centrifugal granulation device equipped with a windbreak board, which facilitates temperature zoning. This approach prevents premature solidification in the liquid filament region while ensuring the timely cooling and solidificatio...