Effect of pore characteristics of fine lignite on particle density in separation medium

ABSTRACT

Effect of porosity on particle density was analyzed, which can be a potential factor of low efficiency. The porosity of particle with different densities was detected by surface area analyzer. In addition, Three-dimensional X-ray micro-imaging system (3D-XRM) was used to analyze the spatial distribution of internal pores. Results show that mesoporous and microporosity content increase with the increase of particle density. Three-dimensional distribution of pores shows that the pores are very rich and show a good connection. The density model including porosity and medium density was established, which shows the effect of medium filling on the change of particle density.

KEYWORDS:

• Filling
• fine lignite
• particle density
• pore connectivity
• porosity

Additional information

Funding

This work was supported by the Scientific Research Foundation of Shandong University of Science and Technology for Recruited Talents (2017RCJJ035), CCEE Research Fund, SDUST and Shandong provincial education association for international exchange.