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Granulation mechanism of gas quenching blast furnace slag with different basicities
Ironmaking & Steelmaking ( IF 2.1 ) Pub Date : 2020-02-16 , DOI: 10.1080/03019233.2020.1719314
Kang Yue 1 , Liu Chao 1 , Zhang Yu-zhu 1 , Xing Hong-wei 1
Affiliation  

ABSTRACT In order to overcome the environmental pollution caused by traditional water-quenching slag treatment and recover a large number of waste heat from blast furnace slag (BFS), the dry granulation process had attracted more and more attention, in which the granulation process was the key. The slag granulation and the crystallization mechanism of the BFS were studied, and the hot experimental results were analysed. The results showed that the viscosity of BFS decreased with increasing basicity, thus was beneficial to the broken of BFS. The higher the basicity, the smaller the crystallization activation energy of BFS, and the bigger the crystal growth index, which was more beneficial to the crystal nucleation and growth of BFS. Reducing the basicity or increasing the cooling rate could be more beneficial to the preparation of amorphous slag beads. The basic slag could obtain the same amorphous results as acidic slag by increasing the gas quenching speed.

中文翻译:

不同碱度气淬高炉渣的造粒机理

摘要 为了克服传统水淬渣处理造成的环境污染,回收高炉渣(BFS)的大量余热,干法造粒工艺越来越受到人们的关注,其中造粒工艺是钥匙。研究了BFS的渣粒化和结晶机理,并对热实验结果进行了分析。结果表明,BFS的粘度随着碱度的增加而降低,有利于BFS的破碎。碱度越高,BFS的结晶活化能越小,晶体生长指数越大,越有利于BFS的晶体成核和生长。降低碱度或提高冷却速度更有利于非晶渣珠的制备。通过提高气淬速度,碱性渣可以获得与酸性渣相同的无定形结果。
更新日期:2020-02-16
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