Fristam Powder Mixer boosts cereal coating production, keeping expansion costs down

Fristam Powder Mixer drives faster dispersion and reduces capital expenditure in high-viscosity cereal coating production

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Introduction to the application and industry overview

In ready-to-eat and snack food manufacturing, consistent coating of cereal products with cocoa or sugar syrups depends on reliable powder dispersion and mixing performance. Traditional top-entry high-shear mixers and batch recirculation can struggle with high-viscosity fluids and dense powders, leading to extended processing times, product waste, and capacity constraints. Inline powder induction and high-shear blending technologies offer efficient, repeatable mixing while scaling production without costly infrastructure expansion.

Customer brief

A major U.S. cereal producer was planning to expand its cocoa-covered puff grain cereal line by replicating an existing production setup. Historically, the process involved adding large quantities of cocoa into a mixture of water, sugar, and corn syrup, followed by agitation with a top-entry mixer. Because cocoa powder is challenging to wet and fully disperse — especially in high-viscosity syrups — the old method required extended tank mixing times and frequently resulted in undispersed solids settling out as waste.

When preparing for capacity expansion, partnering suppliers introduced the manufacturer to the Fristam Powder Mixer as a solution that could reliably integrate dry cocoa powder into liquid streams and improve process efficiency.

Previously unsuccessful methods

Prior to the Fristam solution, the company relied on a top-entry high-shear mixer in large batch tanks. This system repeatedly exhibited:

Incomplete wetting and dispersion of cocoa solids
High viscosity that limited recirculation effectiveness
Extended tank occupancy due to slow mixing times
Settling of undispersed material, leading to waste and inconsistent coatings

These limitations not only reduced production throughput but also required the company to consider additional tanks to meet forecast growth.

Fristam’s solution

After reviewing the application, Fristam recommended one of its Powder Mixers, an inline system that combines a self-priming FZX Liquid Ring Pump for powder induction and an FS Shear Blender for high-shear dispersion. This configuration efficiently draws cocoa into the fluid stream and blends it on first pass, dramatically reducing mixing time and ensuring thorough incorporation of dry powders into liquid media.

For this cereal coating application, the selected model included factory-specified options such as:

Extended funnel height to accommodate larger volumes
Funnel vibrator to prevent powder bridging
Funnel lid for hygiene and contamination control
Double seals for handling sticky, high-viscosity product

This tailored setup ensured optimal performance for the customer’s specific formulation and production demands.

Trial set-up

1. Installation and integration
The Powder Mixer was installed inline with the existing batch tank circulation loop, replacing the top-entry mixer’s role in powder introduction and high-shear blending.

2. Powder induction configuration
Cocoa powder was introduced into the extended funnel, where the FZX pump generated vacuum to pull solids into the liquid stream below.

3. High-shear dispersion
As the mixture passed through the FS Shear Blender, close rotor-stator clearance and high tip speeds ensured uniform wet-out and dispersion of cocoa particles into the syrup.

4. Process observation and optimization
Trial runs were monitored for flow stability, dispersion quality, and mixing time, with operators adjusting powder addition sequence to achieve optimal results.

The Fristam Powder Mixer dramatically improved the producer’s cereal coating process:

Faster, more thorough dispersion of cocoa powder eliminated settling and waste.
Mixing times were reduced by approximately 50% compared to the original top-entry system, freeing batch tanks sooner for additional runs.
Production capacity increased without purchasing additional tanks, saving significant capital expenditure on new infrastructure.
The customer installed three Powder Mixers, one for each existing batch tank, standardizing the improved process across the line.

By addressing both process performance and equipment scalability, the Powder Mixer solution delivered measurable productivity gains while controlling costs.

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Process / Product quality benefits

Uniform dispersion of dry ingredients into high-viscosity syrup
Elimination of undispersed solids and product waste
Improved batch consistency and repeatability
Reduced occupancy time of mixing tanks
Enhanced operator control of powder induction and blending

Sustainability benefits

Decreased energy use through shorter mixing cycles
Minimized ingredient waste improves resource efficiency
Reduced cleaning time and water usage with inline operation

Financial benefits

Reduced capital expenditure by avoiding new tanks
Faster batch turnaround increases effective throughput
Lower production cost through reduced waste and energy use
Predictable and scalable mixing performance

Other benefits

Compact inline installation minimizes footprint impact
Custom options improve handling of challenging powders
Hygienic design supports food safety and compliance

Similar applications

The Fristam Powder Mixer is highly effective in:

sauces and condiments with dry ingredient induction
beverages with powder fortification, confectionery coatings and glazes
high-viscosity dairy and dessert bases

Find the optimal solution for your needs in the food industry

In addition to Mixing & Blending Technology – check out Fristam’s full range of Pumping Technologies suitable for the Food Industry.

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Fristam Powder Mixer boosts cereal coating production, keeping expansion costs down