Vertical planetary mixers play a crucial role as "core reactors" and "homogenization experts" in calcium hydroxide (slaked lime) production, particularly in the crucial digestion stage. Their role goes far beyond simple mixing and is directly related to the quality, activity, and production efficiency of the final product.

Core Function: Completing the digestion reaction and efficient homogenization

Calcium hydroxide production occurs primarily through the digestion (or slaking) of quicklime (calcium oxide, CaO). The chemical reaction is: CaO + H₂O → Ca(OH)₂. The AKW vertical planetary mixer plays a key role in this process as follows:

Targeted mixing tailored to raw material characteristics (such as differences in activity) ensures complete digestion, enabling efficient and thorough digestion.

Strong shear and kneading: The AKW planetary mixer's motion (rotation + revolution) produces intense shear and kneading on viscous lime slurry. This effectively breaks up the calcium hydroxide gel coating formed when calcium oxide reacts with water, allowing water molecules to continuously interact with the internal calcium oxide particles, ensuring the digestion reaction proceeds completely and avoiding the formation of "cooked" or undigested calcium oxide cores.

Eliminating reaction dead zones: Traditional mixing methods are prone to forming dead zones on the tank walls and corners, preventing some materials from fully participating in the reaction. The AKW planetary mixer incorporates a scraper design that continuously scrapes away material adhering to the tank walls and carries it into the main mixing zone, ensuring a uniform and comprehensive reaction.

Ensuring high product uniformity: From the initial mixing with water to the subsequent mixing and refinement, the AKW planetary mixer ensures uniform water and heat distribution, resulting in a calcium hydroxide slurry or powder with a concentrated particle size distribution and stable chemical properties. This is crucial for high-end applications such as chemical processing, water treatment, and flue gas desulfurization.

Precisely controlling reaction conditions: Digestion is an exothermic reaction, making temperature control crucial. AKW vertical planetary mixers are typically linked to PLC control systems and temperature sensors. By adjusting the mixing speed, water addition, and cooling system, the reaction temperature can be precisely controlled to optimize product quality. Frequency conversion allows for flexible adjustment of mixing intensity and duration based on the source and activity of calcium oxide raw materials, providing high adaptability.

Key Advantages of Choosing an AKW Vertical Planetary Mixer

In calcium hydroxide production, choosing an AKW vertical planetary mixer is more than just selecting a mixing device; it's choosing an efficient, reliable, and high-quality production process solution. It directly addresses the core technical challenges of the digestion process and is a key piece of equipment for enhancing product competitiveness and achieving modern, automated production.