Variability in Lime-Mud Feed Rate Induced in the Lime-Mud Filter: Consequences and Actions

This study shows that despite keeping both lime-mud slurry flow and density constant, lime-mud moisture content and feed rate from the filter to the lime kiln can vary significantly. These variations, which were previously not detected in the mill, were revealed after installation of a band scale and a moisture detector. It was found that cleaning the doctor blade caused a periodic disturbance in the lime-mud feed rate to the kiln. The variations in moisture content, however, were too minor to disrupt the stability of a kiln equipped with a flash dryer. This work resulted in a new and better way of continuously estimating available CaO and reburned lime production rate