Fig. 4 Small muffle furnace (a) and ceramic ships in the furnace (b)
S. Wegscheider, S. Steinlechner, M. Leuchtenmüller
CC BY 4.0
S. Wegscheider et. al. "Innovative Concept for the Recovery of Silver and Indium by a Combined Treatment of Jarosite and Electric Arc Furnace Dust", JOM <a rel="nofollow" class="external text" href="https://doi.org/10.1007/s11837-016-2192-7">doi:10.1007/s11837-016-2192-7</a>