Cyclone boiler slag flow enhancers

[Moose11]

We have to blend 50% eastern coal in a cyclone fired boiler in order to keep the slag taps clear. We would like to convert to 100% PRB and are looking at flux technologies to drop the fusion temperatures to keep the slag taps open. What technologies are available. I have heard of iron oxide fluxing agents and borate based products blended in the coal or blown into the furnace. Any resources would be useful. I really have no background in this technology and basics would be appreciated.

 

[JEB66]

Do you have B&W's "Steam 40th edition"?

If you do chapter 20 can tell you how these fluxing agents work on altering the t250 temperature.