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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 19    Special 3    December 2009

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Component modification of steel slag in air quenching process to
improve grindability
ZONG Yan-bing(宗燕兵), CANG Da-qiang(苍大强), ZHEN Yun-pu(甄云璞),
LI Yu(李 宇), BAI Hao(白 皓)

Key Laboratory of Ecologic & Recycle Metallurgy, University of Science and Technology Beijing,
Beijing 100083, China

Abstract:A new solution called component modification in-process was introduced to the difficult grinding of air quenching steel slag by a series of experiments. The results show that the fly ash added into the molten steel slag before air quenching can more effectively improve the slag’s grindability than milltailings, which is the other modification agent tested under the same conditions. The role of fly ash is strengthened as its proportion increases, although the degree of promotion is gradually reduced. As a result of the reaction between fly ash and steel slag at high temperature, some new mineral phases and vitreous bodies with fine grindability promote the slag grinding easily. This work is helpful to making a comprehensive utilization of steel slag and maximize its economic efficiency in China.

 

Key words: steel slag; component modification in-process; air quenching; grindability; particle distribution

ISSN 1672-7029
CN 43-1423/U

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