Mixing and homogenizing

Mixing powders and liquids

Mixers are universally applicable units for introducing powders or liquid phases into a suitable flowable template. With their special pump mixing system, they produce a homogeneous mixture without clumping in a single work step. These systems can be both stationary and mobile.

We also offer simplified versions, such as the powder feeder, which generates negative pressure using a centrifugal pump, or the powder dissolver, which homogenizes the medium using a shear pump.

#

Specifications

  • Feed rate 100 to 10,000 kg/h
  • Viscosity range approx. 0.3 to approx. 100,000 mPas
  • Self-priming up to 5 mWS
  • Temperature range 1 to 95 °C

How the mixers work

Our hygienic powder mixers use a pump mixing system for the efficient mixing of powder and liquid. The process begins with the supply of a base liquid. The powder is fed into the liquid flow from a funnel according to the injector principle. The first pump provides the vacuum for initial mixing and the feed pressure. The downstream shear pump with its rotor-stator combination ensures the final homogeneity. Thanks to high circumferential speeds and narrow shear gaps, the shear mixer generates intense turbulence, which ensures thorough mixing of even multiphase products.

Example of use

Feeding powder, mixing and conveying.

Powder mixer specifications

  • Feed rate from 100 to 10,000 kg/h
  • Viscosity range from approx. 0.3 to approx. 100,000 mPas
  • Temperature range 1 to 95 °C

Advantages

  • mobile, compact
  • CIP and SIP-capable
  • Feeding, mixing and conveying in one device
  • Fast feeding of large quantities of powder
  • Homogeneous mixtures

Variants

  • available according to ATEX (external)
  • Variant for high viscosity up to 100,000 mPas
  • Big bag adapter available
  • CIP cover for feed hopper
  • Switch cabinet for simple control
  • Valves for manual or automatic operation

Nature of pumped media

Powdery media, thin to highly viscous media, finished product up to 100,000 mPas

Typical pumped media and applications

Fine chemicals, pharmaceuticals, cosmetics
  • Salt
  • Phosphates
  • Iodine powder
  • Additives
Dairies and food industry
Beverage industry

Downloads

Example of use

Powder intake in liquids.

Powder solvent specifications

  • Feed rate from 800 to 5500 kg/h
  • Viscosity range from approx. 0.3 to approx. 500 mPas
  • Temperature range 1 to 95 °C

Advantages

  • mobile, compact
  • CIP and SIP-capable
  • Feeding and conveying of easily soluble substances
  • Fast feeding of large quantities of powder

Variants

  • available according to ATEX (external)
  • Big bag adapter available
  • CIP cover for feed hopper
  • Variant with table available
  • Control cabinet available for simple control
  • Valves for manual or automatic operation

Nature of pumped media

Powdery media, finished product up to 1500 mPas

Typical pumped media and applications

Drinks
  • Dry yeast
  • Xantan
  • Citric acid
  • Sugar
Food industry
  • Flour
  • Salt
  • Strength
  • Sugar
Fine chemicals, pharmaceuticals, cosmetics
  • Salt
  • Phosphates
  • Iodine powder
  • Additives

Downloads

The Fristam powder hoist offered by Rototec.

Example of use

Powder intake in liquids.

Powder feed specifications

  • Feed rate from 400 to 8000 kg/h
  • Viscosity range from approx. 0.3 to approx. 2000 mPas
  • Temperature range 1 to 95 °C

Advantages

  • mobile, compact
  • CIP and SIP-capable
  • Fast feeding of large quantities of powder
  • Feeding and conveying of easily soluble substances

Variants

  • available according to ATEX (external)
  • Big bag adapter available
  • CIP cover for feed hopper
  • Variant with table available
  • Control cabinet available for simple control
  • Valves for manual or automatic operation

Nature of pumped media

Powdery media, finished product up to 1500 mPas

Typical pumped media and applications

Drinks

Downloads

A Fristam ShearMixer, distributed by Rototec

Example of use

Mixing, homogenizing powders or oils in liquids.

Specifications Shear Mixer

  • Delivery rate of up to 90 m3/h

Advantages

  • mobile, compact
  • CIP and SIP-capable
  • Homogeneous mixtures

Variants

  • available according to ATEX (external)
  • CIP cover for feed hopper
  • Different rotor-stator systems available

Nature of pumped media

Emulsion, does not convey itself

Typical pumped media and applications

Drinks
Food industry
Pharmaceuticals, fine chemicals, cosmetics

Downloads

Use and operation of the powder mixer

Key advantages in operation

Processing with the powder mixer is significantly faster than with conventional tank mixing; the actual time saving depends on the formulation and system layout and is up to 90%. Direct wetting in the closed system minimizes product losses, while high shear homogenization ensures agglomerate-free mixing. A compact design, also mobile, enables flexible positioning in the production area. Depending on customer requirements, the systems are ATEX-approved or designed with FDA-compliant materials.

Typical areas of application and pumped media

Powder mixers are hygienic and versatile. They are used in the food and beverage industry, in the pharmaceutical and fine chemical industries and in the cosmetics industry to mix powders, granules or any other sensitive raw material evenly or to disperse them into a liquid. The aim is to achieve a mixture with a high degree of homogeneity and minimal energy consumption, while the overall time required remains minimal. In the food industry, hygienic stainless steel mixers are used when the highest food safety requirements apply and a sensitive product needs to be mixed. In the pharmaceutical industry, pharmaceutical mixers or laboratory mixers ensure reproducible batches and a pharmaceutically flawless end product.

Design, variants and selection criteria

Reliable operation and a short powder feeding time depend to a large extent on the correct design. Product properties such as the flowability of the powder and the density and viscosity of the carrier medium, together with process parameters and operating conditions, determine the design of the mixing system. The materials used and their surface quality must also be precisely adapted to the respective application. There is also a focus on food safety, necessary certificates or ATEX requirements. Structured recording of these parameters ensures that the solution is technically suitable, reliable and efficient in the long term.

Integration into existing systems

When integrating a powder mixer, powder feeder or powder dissolver into an existing system, the focus is on smooth integration into the system. Existing pipelines, connection standards, space conditions and existing drive and control concepts are specifically taken into account in order to minimize adaptation costs and downtimes.

As part of retrofit projects, we replace your existing components or optimize your mixing process, for example to improve efficiency, operational reliability or ease of maintenance. A careful analysis of the current situation ensures that the new solution is technically compatible, existing processes continue to run stably and future requirements are taken into account.

Service, maintenance and spare parts

We offer you professional design, commissioning and training for powder mixers as well as manufacturer-compliant maintenance. You can also obtain original spare parts, lubricants and accessories, including documented quality control, from our spare parts specialists. On request, we can supply certificates of conformity and material certificates as well as CE documentation. Clear service agreements, fast response times and traceable test reports, for example on surface quality, create predictability and security in your business.

Consulting and project support

Rototec supports you throughout the entire life cycle of your mixer, from consultation and design to commissioning and ongoing operation. The aim is a technically sound implementation that focuses on reliability, ease of maintenance and cost-effectiveness right from the start. We will find the optimum solution for your application.

FAQ: Frequently asked questions

A powder mixer is an inline mixing system that draws powders into a carrier liquid and mixes them homogeneously. The mixer normally circulates in a tank, but it can also be operated continuously.

The powder is ergonomically filled into a funnel at waist height. By means of negative pressure generated by a pump, the powder is drawn from the funnel into the carrier medium according to the injector principle.

Yes, with higher viscosity media, a positive displacement pump is used instead of a centrifugal pump to pump the carrier medium.

Yes, the powder mixer can be fully integrated into automated systems, e.g. with big bags or screw conveyors.

Cleaning is carried out via CIP (clean-in-place) or SIP (sterilization-in-place)

It is up to 98 % faster, enables 100-% utilization of the ingredients and reduces the personnel requirements to one person.

Yes, over 70 % of the systems are customized to optimally meet specific requirements.

Arrange a non-binding consultation