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Bottom-blown oxygen converter 
ISASMELT 
Blast furnace 
Bolzano process
Kaldo converter
Bloomery
Copper extraction
Multiple hearth furnace
Smelting
Smeltmill
Zinc smelting
Bole hill
Hydrometallurgy
Mechanical alloying
Pressure oxidation
Pyrometallurgy
Roasting (metallurgy)
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