The Art of Adding Liquids to Powders: How to Prevent “Mud” and Lump Formation
Adding liquid to a powder is not simply a “pour and mix” operation. Whether the objective is coating, dedusting, or granulation, the real challenge is achieving uniform liquid distribution without creating wet spots, sticky “mud,” or large lumps that are wet on the outside but remain dry inside. Several engineering factors determine the success of the process: 🔹 Particle Size & Surface AreaFine powders have significantly greater surface area available for liquid absorption. Particle Size Distribution therefore plays a critical role in determining the liquid capacity of the blend. 🔹 Atomization & Powder MovementLiquid should be introduced in a controlled spray of suitable droplet size into a powder bed that is in continuous, intensive motion. Simply pouring liquid onto a static powder can quickly create wet spots, lumps, and paste. 🔹 Viscosity & Temperature ControlHighly viscous liquids may require heating, dilution, or an adapted injection system. Heating the complete feed line up to the nozzle can be essential to prevent…
