TY - JOUR
TI - Study on heating characteristics of granites with different sizes in microwave field
AU - Zhang Yang
AU - Yang Ben-Gao
AU - Xie Jing
AU - Tang Rui-Feng
AU - Bai Yan-Bo
AU - Gao Ming-Zhong
JN - Thermal Science
PY - 2024
VL - 28
IS - 4
SP - 3511
EP - 3516
PT - Article
AB - Studying the heating characteristics of rocks in a microwave field is  fundamental to exploring the mechanism of microwave rock breaking.  Therefore, a heterogeneous granite model was established using COMSOL  Multiphysics to deeply analyze the specific influence of rock size on rock  heating characteristics in a microwave field. The results show that with the  increase of rock size, the heating rate of rock exhibits a fluctuation  characteristic. This phenomenon occurs because changes in rock size leads to  variations in both the magnitude and spatial arrangement of electric field  intensity. Further analysis of the electromagnetic loss of granite reveals  that increasing rock volume can significantly enhance microwave energy  utilization ef­ficiency. Additionally, biotite occupying only 8% of the rock  volume, absorbs over 55% of the microwave energy, highlighting the  significant impact of biotite content on the heating characteristics of  granite.