Effect of calcination temperature on activation behaviors of coal-series kaolin by fluidized bed calcination

• Autorzy: Yuan S. , Han Y. , Li Y. , Gao P. , Yu J.

Identyfikatory

DOI

10.5277/ppmp1862

• Języki publikacji: EN

Abstrakty

EN

This paper is aimed at investigating activation behaviors for coal-series kaolin using fluidized bed calcination as a novel method. The properties of calcined products at different temperature by fluidized bed calcination were evaluated by determination of weight loss rate, whiteness, chemical oxygen demand (COD), aluminum dissolution degree. The thermal behaviors and reaction mechanism were characterized by thermo gravimetric-differential scanning calorimetry (TG-DSC), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), particle size distribution (PSD) and scanning electron microscopy (SEM). The results showed that calcination temperature was essential factor determining the properties and crystallinity of calcined products using fluidized bed calcination. Coal-series kaolin transformed into irregular and amorphous metakaolin with excellent properties as calcined at 600-900 °C, which attributed to the dehydroxylation of kaolinite and combustion of carbon/organic matter. Calcined kaolin eliminated activity ascribed to the recrystallization into mullite when calcination temperature was over 1000 °C. It was believed that fluidized bed calcination was an efficient thermal activation technology for coal-series kaolin and the calcination temperature should be controlled accurately.

Słowa kluczowe

EN

coal-series kaolin; fluidized bed calcination; calcination temperature; activation behaviors

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2018
• Tom: Vol. 54, iss. 2
• Strony: 590--600
• Opis fizyczny: Bibliogr. 28 poz., rys., tab.

Twórcy

autor

Yuan S.

• College of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China
• Research Center of Coal Resources Safe Mining and Clean Utilization, Liaoning Technical University, Fuxin 123000, China

autor

Han Y.

• College of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China

autor

Li Y.

• College of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China
• Research Center of Coal Resources Safe Mining and Clean Utilization, Liaoning Technical University, Fuxin 123000, China

autor

Gao P.

• College of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China

autor

Yu J.

• College of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China

Bibliografia

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).