GRAIN REFINING COMPOSITIONS FOR ALUMINUM AND ALUMINUM ALLOYS

ZIRCONIUM CHEMICALS-NAMELY, ZIRCONIUM OXIDE, ZIRCONIUM SILICATE, ZIRCONIUM SULFATE, ZIRCONIUM HYDROXIDE, HYDROUS ZIRCONIUM CARBONATE, SODIUM ZIRCONIUM SILICOSULFATE, SODIUM ZIRCONIUM LACTATE, AND COMPOSITIONS CONTAINING ZIRCONIUM COMPOUNDS PARTICULARLY USEFUL FOR GLASS POLISHING