TY - EJOU
AU - Xu, Hang
AU - Du, Huiling
AU - Kang, Le
AU - Cheng, Qiudi
AU - Feng, Danni
AU - Xia, Siyu
TI - Constructing Straight Pores and Improving Mechanical Properties of Gangue-Based Porous Ceramics
T2 - Journal of Renewable Materials
PY - 2021
VL - 9
IS - 12
SN - 2164-6341
AB - The large-scale accumulation and pollution of solid mining waste is an urgent issue. Coal gangue is a prominent
type of solid waste, and shows promise for use in high value-added products due to its content of many important
compounds, including SiO2 and Al2O3. This study proposed the preparation of highly porous ceramics from coal
gangue, coal slime, and coconut palm fibers. The ceramics were produced at a sintering temperature of 950°C
with a fiber content of 6 wt%, which led to the formation of porous ceramics with a porosity of 66.93%, volume
density of 1.0329 g/cm3
, compressive strength of 1.1025 MPa, and thermal conductivity is 0.3919 K(W/mk). A
finite element model of the porous ceramics was established using the Abaqus module in ANSYS software, where
the stress distribution and compressive strength were simulated. Further, the relationship between porosity and
compressive strength was analyzed. The thermal properties of the porous ceramics were analyzed using the Fluent
module, where the simulated changes in porosity under various sintering temperatures were consistent with the
experimental data. The preparation of this highly porous ceramic from solid waste coal gangue shows promise for
the minimizing the impact of waste gas and wastewater pollution in the future.
KW - Coal gangue; porous ceramics; mechanical properties; thermal properties
DO - 10.32604/jrm.2021.016090