Process for treating waste sludge from combustion plant desulfurization units and cementitious product of the process

摘要: Aqueous alkaline desulfurization treating units for combustion gases generate as a product an aqueous sludge containing sulfur compounds of calcium. Many such products contain more than 30 percent by weight (of the solids) calcium sulfite hemihydrate. These waste are in part calcined at temperature from 250°C to 650°C produce moisture-free, cementitious which is thereafter recombined with uncalcined can be profitably utilized or may conveniently discarded landfill. If desired, fly ash bottom produced process combined product.