TY - JOUR
TI - The thermal transmission behavior analysis of two coal gangues selected from inner Mongolia in China
AU - Li Lixin
AU - Zhang Yinmin
AU - Zhang Yongfeng
AU - Sun Junmin
AU - Wang Ziqiang
JN - Thermal Science
PY - 2018
VL - 22
IS - 2
SP - 1111
EP - 1119
PT - Article
AB - The differences in the structure and thermal behavior of two coal gangues  samples (Z-1 and Z-2) obtained from Inner Mongolia in China were investigated  through thermogravimetry-derivative thermogravimetry (TG-DTG), X-ray  diffraction (XRD), and Fourier-transform infrared (FT-IR) spectroscopy. The  TG-DTG results indicate that the two coal gangue samples present different  dehydroxylation temperatures and loss on ignition values. The mineralogy of  the Z-1 sample consisted of kaolinite and quartz, whereas that of the Z-2  sample consisted of kaolinite, boehmite and quartz. The XRD and FT-IR spectra  revealed the thermal transmission behavior of the two coal gangue samples  when temperature was increased from 300 °C to 1000 °C. The coal gangue  samples lost hydration water at a temperature of up to 500°C, and the layer  structure collapsed completely as the temperature increased. The typical  bands in the FT-IR spectra of the two coal gangue samples are similar, but  several differences were observed in the intensity and positions of bands.  The intensity of the characteristic bands of boehmite in the samples at 3090  and 3280cm-1 decreased as the temperature increased, and the bands  disappeared at 600 °C. The thermal behavior of the coal gangue samples  differed because of impurities and mineralogical compositions.