Fig. 5
From: Leaching of liquation-feeding furnace dross as a first step for germanium recovery
Leaching yields of germanium and zinc from liquation-feeding furnace dross using oxalic acid under different conditions: a influence of initial acid concentration (2 h, 80 °C, L:S 10:1), b influence of phase ratio (2 h, 80 °C, 12.5% wt. H2C2O4), c influence of temperature (2 h, L:S 10:1, 12.5% wt. H2C2O4), d influence of time (80 °C, L:S 10:1, 12.5% wt. H2C2O4)