Method of producing solid moldings from a by-product of wet limestone-gypsum desulfurization of flue gas

摘要

A method of producing solid molding products from a slurry which has done absorption in wet limestone-gypsum desulfurization of flue gas, comprising the steps of concentrating a gypsum-containing absorption slurry drawn from a wet limestone-gypsum desulfurization apparatus, mixing and kneading the solid concentrated slurry with flyash from a coal-fired combustion source and also with either quicklime or slaked lime, molding the mixture into a given shape using a mold, and then curing a resulting molding in a reaction chamber through which a part of desulfurized gas is passed. A method of producing solid molding products from a by-product of wet limestone-gypsum desulfurization of flue gas comprising the steps of concentrating an absorption slurry drawn from a wet limestone-gypsum desulfurization apparatus, kneading the concentrated slurry which consists mostly of gypsum with flyash and either quicklime or slaked lime and molding the mixture to given shapes, and then solidifying a molded product by drying with water-unsaturated hot air produced with heat recovered from the flue gas. A by-product from the desulfurization of flue gas is converted into products that can be used as building materials.