TY  - JOUR
AU  - Alkan, Gözde
AU  - Mechnich, Peter
AU  - Lucas, Hugo
AU  - Knoblauch, Nicole
AU  - Sommerfeld, Marcus
AU  - Flucht, Ferdinand
AU  - Pernpeintner, Johannes
AU  - Sergeev, Dmitry
AU  - Müller, Michael
AU  - Friedrich, Bernd
TI  - Assessment of Metallurgical Slags as Solar Heat Absorber Particles
JO  - Minerals
VL  - 12
IS  - 2
SN  - 2075-163X
CY  - Basel
PB  - MDPI
M1  - FZJ-2022-01909
SP  - 121 -
PY  - 2022
AB  - The use of ceramic solid particle technology in TES-integrated CSP plants offers a high solar-to-electricity ratio and enhanced storage densities, thanks to their high operational temperatures and wide temperature ranges. Metallurgical slags with composition similar to that of the state-of-art bauxite particles can be used as a sustainable and economical secondary raw material to prepare solid particles. In this study, the as-received state and the high-temperature phase and microstructural changes of two fayalite slags from copper and lead production were elucidated by XRD and SEM/EDS methods in a comparative manner. Solid particles were prepared from slags by the oil dropping method, with subsequent heat treatment. Solar-thermal-application-related functional properties of slag particles, such as heat capacity, absorptance, and thermophysical properties, were evaluated by differential scanning calorimetry (DSC), spectrophotometer, heating microscope, and high-temperature compressive tests, respectively. Owing to the formation of more stable Fe-rich phase components and less amount of glassy phase, copper slag is found to be a more promising secondary resource than lead slag in terms of material and functional properties
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000762288700001
DO  - DOI:10.3390/min12020121
UR  - https://juser.fz-juelich.de/record/907230
ER  -