Fly Ash Wet Handling and its transportation: CaO + Water = > Heat and Violent Steaming: How to co...

I would rather try to reduce the un-reacted CaO in the fly ash, as this indicates excess and ineffective lime dozing. Are you using powder lime? You are required to use crushed lime with a top size of 1 mm. Obviously, you should also try to increase the SA: PA (by PA, I mean fluidizing air), by reducing the fluidizing air by a small marging and increasing the over bed air by the same margin. Changing the bed content by adding fresh bed material more frequently would not be a bad idea either, as Sulfation reaction is less effective when there is more ash in the bed content. You could actually be surprized with the resulting economics of this practice.