Characterisation Of Filter Dust In The Glass Container Industry And Definition Of Its Influence On Green Glass Melts

Filter dust in the container glass industry is continuously and almost completely recycled in the original source tanks. However, problems sometimes occur with this practice in green glass furnaces, which can be put down to the fluctuating redox levels of the filter dust. The characterisation of the dust shows that the determination of the levels of chemical oxygen demand and of sulphite content is insufficent to assess the redox effect in the glass melts. Therefore, melting experiements with green glass batches containing filter dust were carried out on a laboratory scale.