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A metallurgical process generally processes some raw materials or ores into concentrates or primary metals using different technologies.
Roasting, or heating in air without fusion, transforms sulfide ores into oxides, the sulfur escaping as sulfur dioxide, a gas.
These archea, the researchers discovered, are able to transform sulfides in metal ores into sulfuric acid.
Some risks had been expected from the plant, which would refine rare earth ores into manufacturing-grade materials.
You pile oxide ores into a big heap, spray some acid on top and, abracadabra, the copper flows out, having dissolved in the acid.
Ores brought to the surface were taken to a sorting table on which women, boys, and old men separated the pieces by hand, putting the good ores into wooden tubs to be carried to the furnaces for smelting.
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The plant will use natural gas to turn iron ore into iron sponge or iron briquettes.
EMI, a French-owned company, refines Mn ore into either refined ferromanganese or silicomanganese, which are used primarily in steel production.
The processing of titanium metal occurs in 4 major steps: reduction of titanium ore into "sponge", a porous form; melting of sponge, or sponge plus a master alloy to form an ingot; primary fabrication, where an ingot is converted into general mill products such as billet, bar, plate, sheet, strip, and tube; and secondary fabrication of finished shapes from mill products.
This turns uranium ore into UF6, the essential preliminary step before enrichment.
Processing phosphate ore into fertilizers and phosphoric acid for export is a major economic activity.
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