Roasting is the whole process of heating ore during the existence of air, whereas calcination is the process of heating ore during the absence of air. The different processes linked to extracting metals from their ores and refining them to be used are generally known as metallurgy. Roasting: The entire https://messiahpjapf.blog-a-story.com/9529374/the-single-best-strategy-to-use-for-metallurgical-processes