Chemicals used in industry, with the exception of grain refinement additives for aluminum alloys; silica in powdered, granulate and gel form, for use as a filler in the manufacture of natural and synthetic rubber, for latex, for compounds of thermoplastic materials and of synthetic resins, for adhesives and for mastic compounds; silicon dioxide for use as a carrier material for chemical substances and colorants, as a quality-improving component for ceramic compounds and as a scorifying compon...