In metallurgy, usually the first step in smelting ore to extract metal. The ore is heated in the presence of an abundant flow of air to drive off moisture and, if the metal-bearing mineral is a sulfide, convert it to an oxide. Sulfur fumes from ore roasting have been a major source of environmental pollution in the past.
Learn more about roasting with a free trial on Britannica.com.
|
|
|
|
|
|
|
|
|
|
|
|