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Rapid Detection of cement raw meal Composition Based on Near Infrared Spectroscopy

Journal of Wuhan University of Technology(Materials Science) 2022年第5期37卷 900-904页

作者：黄冰 WANG Xiaohong 蒋萍 QIAO Jia School of Chemistry and Chemical Engineering University of JinanJinan250022China School of Electrical Engineering University of JinanJinan250022China

The composition of cement raw materials was detected by near-infrared spectroscopy.It was found that the BiPLS-SiPLS method selected the NIR spectral band of cement raw materials,and the partial least squares regression algorithm was adopted to establish a quantitative correction model of cement raw materials with good prediction effect.The root-mean-square errors of SiO_(2),Al_(2)O_(3),Fe_(2)O_(3) and CaO calibration were 0.142,0.072,0.034 and 0.188 correspondingly.The results show that the NIR spectroscopy method can detect the composition of cement raw meal rapidly and accurately,which provides a new perspective for the composition detection of cement raw meal.

关键词： near infrared spectroscopy cement raw meal band selection detection model

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USE OF CONSTRUCTION AND DEMOLITION WASTESAS raw MATERIALS IN cement CLINKER PRODUCTION

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China Particuology 2006年第2期4卷 83-85页

作者： Christos-Triantafyllos Galbenis Stamatis Tsimas Laboratory of Inorganic and Analytical Chemistry School of Chemical EngineeringNational Technical University of Athens 9 Heroon Polytechniou Zografou Campus 15773 Athens Greece

The aim of the present paper was to investigate the possibility of utilizing Construction and Demolition （C＆D） wastes as substitutes of Portland cement raw meal. The C＆D wastes that were so used, were the Recycled Concrete Aggregates （RCA） and the Recycled Masonry Aggregates （RMA） derived from demolished buildings in Attica region, Greece. RCA and RMA samples were selected because of their calcareous and siliceous origin respectively, which conformed the composition of the ordinary Portland cement raw meal. For that reason, six samples of cement raw meals were prepared： one with ordinary raw materials, as a reference sample, and five by mixing the reference sample with RCA and RMA in appropriate proportions. The effect on the reactivity of the generated mixtures, was evaluated on the basis of the free lime content （fCaO） in the mixtures sintered at 1350℃, 1400℃ and 1450℃. Test showed that the added recycled aggregates improved the burnability of the cement raw meal without affecting negatively the cement clinker properties. Moreover, the formation of the major components （C3S1 C2S1 C3A and C4AF） of the produced clinkers （sintered at 1450℃） was corroborated by X-Ray Diffraction （XRD）.

关键词： recycled concrete aggregates recycled masonry aggregates cement raw meal burnability study

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