This article describes the mineral characteristics, thermodynamic analyses, kinetic tests, and coordinated mass and energy balance of a zinc extraction process for oxidized minerals. The reduction, performed in an induction furnace with a load of 3 kg, permits almost complete zinc extraction in the temperature range 1,650-1,673 K after 90 minutes. The process is thermodynamically advantageous, shows small irreversibility, and yields two interesting by-products: exhaust gas with high CO content and iron alloys. The discard slag does not contain toxic components, and the zinc oxide produced meets the requirements for hydrometallurgical processing. Dust -Thermocouple +PVPt-~13o/) (Zn, CO) Gas Mineral 0 o 0 o Q(kWh) 0 o Metallic 0 o Phase (Fe) 0 o Control Volume 0 o 0 o Figure 1. The crucible assembly for the zinc extraction experiments.
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