Features of the use of technogenic waste the chemical industry for the production of fire-resistant materials

Abstract

Analysis of the existing methods of preparing phosphogypsum for fire-resistant gypsum binders showed that today four methods are mainly used to remove impurities : washing phosphogypsum with water; washing in combination with neutralization and sedimentation of impurities; method of thermal decomposition of impurities; introduction of neutralizing, mineralizing and regulating additives.