Which method of metal refining is generally used when a metal of high degree of purity is needed?
What type of ores are roasted?
In roasting ore is heated in the presence of excess of oxygen or air. This method is employed for sulphide ores. Example: ZnS (sphalerite) and Cu2S (chalcocite).
Explain the following:
Partial roasting of sulphide ore is done in the metallurgy of copper.