A comprehensive characterization on the structural and thermophysical properties of sintered ore particles toward waste heat recovery applications
Tian F, Huang L
Applied Thermal Engineering 90 (5): 1007-1014.2015
China
Waste heat recovery from sintered ore particles (SOPs) is deemed to be a promising approach to improving the thermal efficiency in iron and steel industry. In this work, industrial SOPs sampled from a steel plant were characterized to obtain a comprehensive set of fundamental structural and thermophysical properties. The SOPs investigated were identified as self-fluxed sinters having a basicity of 1.175 after composition analysis, and two peaks were observed on the pore size distribution. The specific heat capacity of the SOPs at elevated temperatures up to 200 °C was measured, with a power-law fit curve being established for extrapolation to higher temperatures up to 900 °C. The thermal conductivity of the SOP samples with various porosities was determined experimentally, while a Sierpinski-carpet-based fractal model was also utilized to predict the effective thermal conductivity as a function of porosity. The fractal model was validated by the experimental results, which can be applied over a wide range of porosity.
https://www.sciencedirect.com/science/article/abs/pii/S1359431115007681