Pyroprocessing Systems. Pyro-processing systems offered to the minerals industry include drying, preheating and cooling powdery and lumpy bulk materials, pre-reducing of ores, direct reducing of ores, calcining and burning lime, dolomite, magnesite, gypsum, clay, alumina, bauxite, kaolin, titanium oxide, soda, chrome ore, phosphate, metallic hydroxides, chemical products, coke, coal and oil ...