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the operation of heating sulphide ores in air to convert to oxide. Sometimes the sulphur-bearing gases produced are used to make sulphuric acid., mineraalsete materjalide kuumutamine
särdamine . Koolisõnastikud 2005–2010. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//kool_KV/s%C3%A4rdamine/1/est (01.07.2026)
