Method for producing an aggregate for building materials

摘要

In the method, free lime present in ash-laden flue gases is already slaked in the flue gas duct in order to decrease the content of free lime in the filter ash. For the slaking process, water is injected finely divided into the hot flue gas stream upstream of the electrostatic precipitator. Calcium oxide is converted to calcium hydroxide. At the same time, ammonium salts can be decomposed basically.