Patent ID: 9051199
Filing Date: 2015-06-09
Classification: C03B,C03C,Y02P

Abstract:
1. A process for making soda-lime glass, which includes the steps of: (a) calcining calcium carbonate (CaCO3) at an elevated temperature sufficient to produce carbon dioxide (CO2) gas and calcium oxide (CaO) in solid phase, (b) reacting a sodium-containing compound with silica (SiO2) to produce sodium silicate glass (Na2SiO3) in liquid phase, (c) refining the liquid phase sodium silicate glass product of said step (b), and (d) after completion of said step (c), dissolving the solid phase calcium oxide product of said step (a) in the refined liquid phase sodium silicate glass product of said step (c) to produce a refined liquid phase soda-lime glass melt.