C CHEMISTRY; METALLURGY
C04 CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
C04B LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
C04B5/00 Treatment of; metallurgical; slag; Artificial stone from molten; metallurgical; slag
C04B5/06 Ingredients, other than water, added to the molten slag; or to the granulating medium or before remelting; Treatment with gases or gas generating compounds, e.g. to obtain porous slag