Arsenic Condensation and Reaction Mechanisms in Flash Smelting Off-Gas Line Conditions

Abstract Arsenic is a common impurity element in sulfide concentrates. It tends to accumulate the flue dust of smelting furnace due volatility and internal circulation practiced smelting-converting process chain. The only outlets for arsenic are anodes discard slag. condensation dust-free conditions was studied below 800 °C where gas atmosphere controlled by SO 2 -air-N mixtures. Based on these experimental results, we confirm kinetically constrained formation mechanism arsenic-containing dust, its speciation into metallic, oxidic (III, V), sulfidic species. influences temperature were compared with industrial data discussed. Graphical Condensed arsenic‐bearing particles collected electrophoretic forces surface fused SiO ‐O atmospheres: crystal morphology shows euhedrally facetted As O 3 crystals initially molten As‐OS alloy droplets together poorly crystallized AsS x particles.