Treatment of materials by means of chemical and heat treatment; treatment and transformation of materials by means of lasers, heating, and chemicals; treatment of ores and common metals and their alloys; metal processing, namely, refining and finishing; energy production; processing of ferroalloys, ferrochrome, manganese, silicon, chrome ore, manganese ore, limestone, dolomite and construction gravel, coal, coke, semi-coke; production of ferroalloys, ferrochrome, ferromanganese, ferrosilicoch...