Hello Dipendra,

What concentration of fluoride did you try? You should aim to have the clinker fluoride level at a maximum of 0.25% F for adequate mineralisation without cement performance issues. (Fluoride levels in the clinker of  >0.25% may detrimentally affect cement setting and/or strength performance, due to incorporation of fluorides into C3A and C3S.)

Build-ups of spurrite and fluor-ellestadite may result if the concentration of fluoride in the clinker exceeds 0.5% F.

Regards,

Ted.

Fluorite is very effective flux, reducing the temperature of the formation of the  liquid phase, so you have a large number of the liquid phase  in cyclones.  Liquid phase adhered to the wall of the cyclone and blocked it. Add fluorite makes sense to reduce the temperature of clinker formation. Try giving it directly to the rotary kiln after passing cyclones. In this case careful look ring formation  at the rotary kiln. Bur ring in rotary kiln remove less complicated than in the cyclone. To remove the ring in rotary kiln just move the gas burner.

Thnks For ur valuable coments and suggetions , we have not gone more than 0.2 % & Cyclone blockage we have faced in 3rd Cyclone ( 5 stage PH )

We will start feeding from kiln I/L

We have started with 0.5 % then we have come down to 0.2 % now we have started again with 0.05 % from Kiln I/L