What is 'feeder calibration' and how does this information affect my slaking system?

A feeder calibration is a method of collecting a sample or product from a feed to correlate the RPM (speed) of the feeder to the amount (weight) of product being delivered.

The slaking control scheme requires accurate information about the quantity of quicklime being discharged into the slaker in order to properly calculate the correct flow of water to best react with the lime. A minor discrepancy in quicklime addition is compensated for in the controller. If the expected quicklime feed rate vs actual quicklime feed rate is significantly different, the slaker may overheat or not generate enough temperature resulting in a poorer quality of lime slurry.