Just as importantly, no metallurgic by-products like slag have been recovered from the site. The presence of such waste would provide the smoking gun for copper smelting among this group of ...

The safe disposal of copper slag-- the process of converting copper sulphide ores into refined copper, through crushing, flotation, smelting and conversion— has been a universal problem among ...

it undergoes a pyrotechnic thermite reaction that spontaneously raises the smelter temperature without using many external fuel sources. The thermite reaction step leaves behind a floating slag of ...