Jingyu Tian's research while affiliated with China University of Mining and Technology and other places

Publications (4)

Article
Full-text available
The experiments were performed to explore the effect of moisture on fragmentation properties of Mengdong (MD) lignite, Xiao Longtan (XLT) lignite, and Zhaotong (ZT) lignite with temperature of 200°C and particle size of 13–10 mm using the fixed bed reactor. It showed fragmentation ratio and pulverization ratio increased, and particle size variation...
Article
The fragmentation and pulverization properties of lignite in the different drying processes were investigated in this study. Lignite particles were dried at different temperatures (100, 140, and 180°C), particle sizes (6–25 mm) and drying time (0–60 min), and the parameters of fragmentation index (Sf) and pulverization ratio (β) were used to descri...
Article
A new laser flash system and micro calorimeter were proposed to measure thermal properties of lignite and determine the influences from temperature, moisture and physical structure. It was showed that the thermal diffusivity of lignite ranged from 0.12 mm2/s to 0.23 mm2/s (30~250 oC). The decreasing thermal diffusivity with increasing temperature w...
Article
High temperature drying processes by hot gas of hard (Shengli, SL) and soft (Zhaotong, ZT) lignite was explored in this study, and found that the temperatures made significant differences on the drying process. For SL-2mm and ZT-2mm, the drying rate at 300 ℃ was 4.4 times and 13.6 times of that at 150 ℃, which meant that the influence of temperatur...

Citations

... Huang et al. [35] proposed that larger pores are the main paths of moisture transport in the drying of lignite, which affects mass transfer and maximum drying rate. In addition, Chen [36] found that water in pores with a diameter greater than 50 nm has a significant effect on the fragmentation of lignite during drying. Therefore, according to the characteristics of moisture transfer and pore size distribution in the drying process shown in Fig. 4, it can be considered that, following the scheme of Xoдoт (1966), Zhaotong lignite consists of four types of pore structure: macropores (greater than1000 nm), mesopores (100-1000 nm), transition pores (10-100 nm) and micropores (< 10 nm) [37]. ...
... They found that heating temperature, holding time, and the particle size of the feedstock significantly affect coal fragmentation, which is believed to have relation to the evaporationdiffusion behavior of the internal moisture of the coal particles during drying. Similar research by He et al. (2018) indicated the fragmentation increased with the increase in temperature and particle size, and fragmentation increased rapidly first and then tended to grow slowly with drying time. Moreover, there is a linear relationship between the fragmentation index and the loss of moisture content. ...
... Les courbes de flux de chaleur obtenues représentent alors l'enthalpie sensible du lignite comprenant la capacité thermique du lignite qui peut donc être déterminée (̇= 0, = , ∆ ). La Figure 2. 3 compare la capacité calorifique spécifique du lignite obtenue au cours de nos essais et les valeurs disponibles dans la littérature (Wan, Chen, Miao, He, et Tian, 2017;Deng, Li, Xiao, Shu, et Zhang, 2017). Le char obtenu en fin de test est pesé et un second essai est effectué sur celui-ci. ...
... Lignite from the Shengli (SL) coalfield mine in Inner Mongolia, in the northeast of China was used in experiments, a kind of hard lignite [33]. The lignite, as received, was crushed to À2 mm. ...