title: Reusing pretreated desulfurization slag to improve clinkerization and clinker grindability for energy conservation in cement manufacture.
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.
authors.affiliation: Department of Environmental Engineering, National Cheng Kung University, No. 1, University Road, Tainan City 70101, Taiwan, ROC. p5893110@mail.ncku.edu.tw
authors.forename: Ying-Liang
authors.initials: YL
authors.lastname: Chen
authors.forename: Juu-En
authors.initials: JE
authors.lastname: Chang
authors.forename: Pai-Haung
authors.initials: PH
authors.lastname: Shih
authors.forename: Ming-Sheng
authors.initials: MS
authors.lastname: Ko
authors.forename: Yi-Kuo
authors.initials: YK
authors.lastname: Chang
authors.forename: Li-Choung
authors.initials: LC
authors.lastname: Chiang
mesh_terms: D003246:Conservation of Energy Resources; D003252:Construction Materials; D007220:Industrial Waste / Q000032:analysis*; D055595:Mechanical Phenomena; D018505:Waste Management
chemical_list: D007220:Industrial Waste