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