Abstract:
In this study, quartz was used to be mixture in glass production instead of silica sand to reduce cost. The particle size and phase composition of small silica sand was analyzed to compare with small, medium and large quartz that effect to melting temperature at 1200-1400 ºC for 1 hr. The chemical composition, color, thermal expansion coefficient and viscosity of soda-lime glass sample that made from silica sand and quartz at melting temperature 1450 ºC for 3 hrs. was analyzed. The results indicated that both of glass is similarity. The CIE L*a*b color system of quartz glass has given L*= 61.04 a*= -33.73 b*= 78.93. The thermal expansion coefficient is 8.69x10-6 K-1. The viscosity at strain point, annealing point, softening point, working point, gob temperature and melting temperature is 544.9, 575, 647.3, 1059.3, 1215.7 and 1445.8 ºC, respectively. The result from Batch-free-time testing at temperature 1400 ºC for 80-100 minute and phase composition analysis indicated that quartz and sand glass were completely melted at 100 minute. The calculated energy for melting by using thermodynamic of glass which made from quartz is Exploited heat (Hex) 601.03 kWh/t, which is similar with sand.