LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
Treatment or selection of the fuel therefor, e.g. use of hazardous waste as secondary fuel; ; Use of particular energy sources, e.g. waste hot gases from other processes
