On-Site Preparation of Opaque Glass Using Liquid Phosphorus Slag

In order to recycle both the heat energy and the material of hot liquid phosphorus slag discharged from the phosphorus smelting furnace and eliminate its environmental problem, on-site preparation tests were carried out beside the smelting furnace by undertaking the following process: first, 75.0 % fresh hot liquid phosphorus slag was mixed directly with 16.5% quartz powder and 8.5% kaolin clay, and then melted at 1450℃ and cast-molded into parent glass panels which were subsequently heat-treated at 850℃ and transformed into opaque glass, which possesses bending strength, acid resistance and alkali resistance respectively of 43.68MPa, 0.51% and 0.04%, and so is applicable for wall decorating in buildings.Resultsof ESEM, XRD and EDS analyses indicate that the mechanism of emulsification of parent glass is attributed to the phase separation of parent glass and so the deposition of the non-crystalline spherical granules with particle sizes of about 0.1-0.4μm. Since high proportion of hot liquid phosphorus slag is consumed, cheap modifying raw materials are used and ordinary glass manufacturing facilities can be directly employed, the proposed on-site test process is cost-effective and feasible for industrial manufacturing.