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Flue gas gypsum is obtained as a moist finely divided powder from the desulfurization of combustion gases in power plants. From its upgrading by drying and agglomeration, a material is produced very similar in its properties to that of natural gypsum. The drying is carried out very successfully by using rapid driers. Agglomeration can be done by the process of briquetting, compaction, or pelletizing. Briquetting, the most reliable of the agglomeration processes, will be described in more detail. Flue gas gypsum briquets can be used by both the gypsum and the cement industry. In case of a surplus, these briquets can easily be stored in the open, especially during winter months. This puts the power plant operator in a position whereby he can produce by-product gypsum with a variety of application properties and at the same time contribute to the gypsum being reliably and economically utilized.
gypsum, drying, agglomeration, briquetting, flue gas gypsum, by-product of desulfurization, processing of flue gas gypsum, flue gas gypsum briquets
Manager of research and development, Gebr. Knauf Westdeutsche Gipswerke, Zentrallaboratorium, Iphofen,