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'''Pyroprocessing''' (from [[Ancient Greek|Greek]] Πυρος = ''fire'') is a process in which materials are subjected to high temperatures (typically over 800°C) in order to bring about a chemical or physical change. Pyroprocessing includes such terms as [[roasting (metallurgy)|ore-roasting]], [[calcination]] and [[sintering]]. Equipment for pyroprocessing includes [[kiln]]s, [[electric arc furnace]]s and [[reverberatory furnace]]s.
Pyroprocessing is usually the most energy-intensive stage of an industrial process.
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