Chemicals for use in industry; industrial chemicals based on calcium carbonate, magnesium carbonate, dolomite, calcium oxide, magnesium oxide, dolomitic lime, calcium hydroxide, magnesium hydroxide, hydrated dolime, milk of lime and/or dolime, calcium and/or magnesium salts and mixtures out of the above mentioned materials; industrial chemicals for metallurgical processes with mineral and/or artificial and/or metallic additives based on the above mentioned substances for slag formation, clean...