The use of coal in South Africa dates back to the iron age (300-1880 AD), when charcoal was used to melt iron and copper, but large-scale exploitation of coal did not occur until the mid-19th century.

With the artisan guiding her she melted the gold and copper together in the exact amounts he told her, she rolled it and pulled it, sweating, cursing, she transformed it into strong wire for the god's smiting hammer.

Recently it was shown that this stone was used as a pot to melt copper.

Where once there was a radio receiver, now is melted plastic, melted copper, new glass, iron filings, and minor contaminants.

Bronze is made by melting copper and tin together by heating them in an ancient pot over red-hot charcoal, or else old and broken instruments are recycled.

It can keep its flames cool enough to not even start hay or paper aflame, but it can become hot enough to melt copper in combat.

Bronze is made in their workshops by melting copper and tin and mixing them in a charcoal-fired furnace.

To melt copper you've got to get up over eleven hundred degrees centigrade.

Later emperors increasingly relied on melting down older sestertii, a process which led to the zinc component being gradually lost as it burned off in the high temperatures needed to melt copper (Zinc melts at 419 C, Copper at 1085 C).

"Melted copper" generally refers not to copper that is currently melted, but to "previously melted, resolidified copper".