Reusing pretreated desulfurization slag to improve clinkerization and clinker grindability for energy conservation in cement manufacture

Ying Liang Chen, Juu En Chang, Pai Haung Shih, Ming Sheng Ko, Yi Kuo Chang, Li Choung Chiang

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The purpose of this study was to combine the physical pretreatments of grinding, sieving, and magnetic-separation processes to reclaim iron-rich materials from the desulfurization slag, and to use the remainder for cement clinker production. The iron-rich materials can be separated out efficiently by grinding for 30 min and sieving with a 0.3 mm mesh. The non-magnetic fraction of the particles smaller than 0.3 mm was in the majority, and proved to be suitable for use as a cement raw material. The raw mixes prepared with a pretreated desulfurization slag had a relatively high reactivity, and the temperature at which alite forms was significantly reduced during the clinkerization process. The clinkers produced with 10% desulfurization slag had a high level of alite and good grindability. Generally, the improvements in clinkerization and clinker grindability are beneficial to energy conservation in cement manufacture.

Original languageEnglish
Pages (from-to)1892-1897
Number of pages6
JournalJournal of Environmental Management
Volume91
Issue number9
DOIs
Publication statusPublished - 2010 Sep 1

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Waste Management and Disposal
  • Management, Monitoring, Policy and Law

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