Hydrothermal Solidification Mechanism of Calcareous Materials and Resource Utilization of Desulfurization Ash
2020
Abstract—The hydrothermal solidification mechanism of different calcareous materials was investigated. The hydrothermal solidification of desulfurization ash was also discussed. The results showed that hydroxide is an important condition in solidifying hydroxide-free insoluble calcareous material. External hydroxide ion and the addition of glass power can accelerate the hydrothermal reaction process of calcium sulfate and calcium carbonate. Desulfurization ash is a common calcareous waste and the addition of hydrogen peroxide in hydrothermal solidification can solve both stabilization and solidification problem in the same step. The hydrothermal sample has a compressive strength of 95.6 MPa when the desulfurization ash utilization rate is 60%.
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