The process of ironmaking has relied for centuries on iron ore, an impure form of iron oxide, slowly being reduced to iron by carbon monoxide in a furnace. Whether that furnace is the charcoal fire of ...
About 5,000 years ago, people living in what is now Iran began extracting copper from rock by processing ore, an activity ...
A century and a half ago, U.S. soldiers stationed in Utah discovered silver deposits in the Rush Valley and founded the town of Stockton in 1864 as a major center for smelting ore into precious metals ...
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