noun
or heap roast
: a process in which high-sulfur ore piled in the open is roasted without fuel other than for ignition, the heat being furnished by the combustion of the sulfur in the ore
noun
or heap roast
: a process in which high-sulfur ore piled in the open is roasted without fuel other than for ignition, the heat being furnished by the combustion of the sulfur in the ore
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012