Abstract:

The sand is one of the basic raw materials used in glass production.It contains some metal oxides as impurities. These may cause the color problem and some defects as bubble and streak in the final product in glass production. In order to obtain at desired quality of the product, the raw material must be made compatible with the prescription. In this study, the surface properties of glass and the behavior of certain metal oxides(Fe2O3, TiO2, MnO) were investigated during different temperature and melting times. The lead glass was chosen as the type of glass to be used in this study about easy casting at low temperatures. After melting process, the surface properties of glasses were observed. Grain properties of glasses were examined under the microscope. And also, the colors of the glasses was examined by means of a UV spectrometer to determine the tinting ions and the valence of these color ions. Mineral processing techniques have been studied on the separation of metal oxides from sand for homogenization. Magnetic and flotation methods were used based on material properties of impurities. The results indicate that in additional to melting temperatures and times, Fe2O3, TiO2, MnO were determined as among the factors that affect adversely the quality of glass.

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