%0 Journal Article
%A Alkan, Gözde
%A Mechnich, Peter
%A Lucas, Hugo
%A Knoblauch, Nicole
%A Sommerfeld, Marcus
%A Flucht, Ferdinand
%A Pernpeintner, Johannes
%A Sergeev, Dmitry
%A Müller, Michael
%A Friedrich, Bernd
%T Assessment of Metallurgical Slags as Solar Heat Absorber Particles
%J Minerals
%V 12
%N 2
%@ 2075-163X
%C Basel
%I MDPI
%M FZJ-2022-01909
%P 121 -
%D 2022
%X 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
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000762288700001
%R 10.3390/min12020121
%U https://juser.fz-juelich.de/record/907230