Lime Mud Dewatering Agent

The need for lime mud dewatering aids

Fuel cost for lime kiln operation is one of the single largest expenses in pulp mills. Any product and / or technology which can lower costs are highly welcomed.

Lime mud dewatering aids are blend of different surfactants. These products work via two primary mechanisms namely Increased Dewatering and Increased Washing (include foam and soda loss control).

The use of lime mud dewatering aids provides the following benefits:

  • Improved water removal at the pre-coat lime mud filter and increased fuel efficiency of the lime kiln. In essence, the calcite particle surface converts from hydrophilic to hydrophobic. Most importantly, the originally sorbed water is displaced and is now free water that can be removed easily with the pre-coat filter vacuum.
  • Reduced levels of Total Reduced Sulphur (TRS) emissions from the lime kiln.

Application areas

Lime mud dewatering aids are normally dosed at the inlet to the pre-coat lime mud filter and small quantities in the spray shower. Dosage levels vary between 0.20 to 0.40 kg/ton of lime mud (CaCO3) or 0.40 to 0.70 kg/ton re-burnt lime (CaO).


Amazon Papyrus has a range of lime mud dewatering aids for different lime mud dewatering systems (simple drum washer, drum with CPR or multi disc filters), raw materials and specific purposes.

Our team of professionals would work with you to select the most appropriate products to meet your specific needs.