Salt Melt Solidification and Granulation on KAISER Cooling Belt Systems
Reliable Solidification Solutions for High-Temperature and Corrosive Inorganic Melts
Inorganic salt melts belong to the most demanding product groups in solidification technology. Their high melting points, corrosive properties, and hygroscopic behavior require robust mechanical design, precise temperature control, and carefully selected materials.
KAISER provides advanced cooling belt systems specifically engineered to meet these challenges—ensuring stable operation, long equipment lifetime, and consistently high product quality.
Applications & Processing Concepts
KAISER cooling belt systems are used worldwide for the solidification of a wide range of inorganic salts. Depending on the melt properties, either a film solidification (flakes) or a pastillation process is applied.
Most salts are mostly processed as a uniform molten film on the cooling belt with high capacities achievable. After controlled crystallization, the solid layer is reduced to the required particle size by an integrated crusher. For smaller quantities the pastillation process with KAISER Rollosizer is suitable.
For Caustic Soda (NaOH) and Caustic Potash (KOH), a dedicated pastillation process is used. The melt is fed as droplets onto the cooling belt via a special version of the ZN system, specifically designed for these extreme conditions.
Product Portfolio
Aluminium Sulphate
Aluminium sulphate is processed using a special film application unit that mixes a defined amount of fine seed particles into the melt immediately before feeding. These crystals initiate instant crystallization on the cooling belt.
A mist applicator supplies crystal water, ensuring solidification occurs over the belt length till the discharge end. From there a slow-running maturation belt provides sufficient residence time for the flakes to develop their final crystal structure before entering the downstream hammer mill.
KAISER provides:
- Proven process know-how from recent industrial installations, including specialized product feeders
- Downstream maturation belt for controlled crystallization
- Integrated hammer mill for precise and guaranteed particle size distribution
- Excellent product uniformity for water treatment and paper industry applications
Calcium Chloride (CaCl₂) & Magnesium Chloride / Bischofite (MgCl₂·6H₂O)
Highly hygroscopic and corrosive melts—ideally suited for KAISER’s film solidification process.
Key features:
- Overflow weir feeder or distribution pipe made from high-alloy, corrosion-resistant materials for extended service life
- Stable film formation and efficient heat removal
- Uniform flakes with excellent handling properties
- Controlled crushing for consistent particle size distribution
Caustic Soda (NaOH) & Caustic Potash (KOH)
Salt melts processed via advanced pastillation technology.
Engineering highlights:
- Pastillation at temperatures up to 370 °C
- Special ZN system design using highly corrosion-resistant materials to withstand extreme thermal and chemical loads
- Inline belt cleaning system for continuous operation
- GMP-compliant system design for food-grade applications
- Dehumidified air supply to prevent moisture uptake and ensure product purity
Why KAISER? Designed for Durability, Safety & Performance
Optimized Processing for Every Melt Type
KAISER offers pastillation technologies even for extreme applications such as caustic soda and potash, as well as film solidification concepts that ensure maximum throughput and consistent product quality.
Material Selection for Long Equipment Lifetime
Salt melt processing demands exceptional corrosion resistance.
KAISER integrates:
- High-alloy steels for feeders and wetted components
- High-performance anti-corrosion coatings and materials
- Special high-temperature materials for NaOH/KOH pastillation
- Optimized belt supports and bearing designs to reduce wear and simplify maintenance
Stable Operation & Low Maintenance
KAISER systems are engineered for continuous industrial operation:
- Uniform film or droplet formation
- Efficient cooling for high production rates
- Inline belt cleaning and dehumidified air supply for caustic soda and potash
- Integrated crushing systems for precise particle size control and low dust generation
KAISER - Your Partner for Challenging Salt Melt Applications
With decades of experience in cooling belt technology and a proven track record in high-temperature and corrosive applications, KAISER delivers reliable, long-life solutions for inorganic salt melt solidification.
From engineering and material selection to commissioning and lifecycle support, KAISER ensures stable operation, extended equipment lifetime, and premium product quality.