Chemical Nature Of Dust Emissions From Soda-Lime Glass Production And Their Environmental Impact

Dust emissions from soda-lime glass furnaces are made up by 75-95% of sodium sulphate, depending on the type of glass produced. Concentration levels of dust represent about 6% of total annual emissions and are much lower than the correspondent emissions of NOx and in most cases, SOx. While the application of appropriate primary measures reduces dust pollution, filter dust is generated as a result of waste gas treatment in either electrostatic precipitators or bag filters. The possibility of recycling the filter dust to the batch composition is also discussed in this paper.