Chemical and Mechanical Characteristics of the Byproduct Gypsum Produced in a Hungarian Lignite-Fired Power Plant

摘要

Several hundred thousand tonnes of FGD gypsum is produced annually at the Matra Power Plant (Hungary) as a byproduct of generating electricity and protecting the environment. Chemical and mechanical characteristics of this material were studied by Department of Mining and Geotechnical Engineering, University of Miskolc (Hungary). The material in question was found dead gypsum which can be calcined easily to obtain relatively high-strength (15-25 MPa) and clean binding material. Furthermore grain composites were made of it by adding fly ash which the power plant can provide the expected producers with, thus decreasing energy consumption of calcining and utilizing a small part of coal combustion wastes.