Pyrometallurgy relies on high temperatures to extract metals from their ores or concentrates.
The process involves smelting and roasting the raw material in a furnace where heat triggers chemical transformations, separating the metal from impurities.
Crucially, pyrometallurgy is well-suited for ores with high metal content and stable mineral compositions.
Hydrometallurgy, in contrast, utilizes aqueous solutions to dissolve and recover metals from ores or concentrates.
This approach is particularly effective for low-grade ores or complex mineral compositions where direct smelting may not be feasible.
Hydrometallurgical processes typically involve leaching, where the ore is exposed to specific chemical solutions that selectively dissolve the target metals.
In precious metals refining, pyrometallurgical methods are commonly employed for materials which contain relatively high concentrations of gold and silver.
In precious metals refining, hydrometallurgy finds application in extracting gold and silver from low-grade ores or secondary sources such as electronic waste or tailings(Gur, 2024).
