Roasting Is the whole process of heating ore from the presence of air, Whilst calcination is the process of heating ore during the absence of air. From the In the vicinity of East, about 3,500 BC, it had been learned that by combining copper and tin, a exceptional steel may https://metallurgicalprocesses45788.blogdanica.com/29589753/the-ultimate-guide-to-metallurgical-processes
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