Lödige CoriMix® ringlayer mixer for continuous operation: cost-effective and versatile

The concept of the CoriMix® ringlayer mixer for continuous operation is based on a high circumferential speed of the mixing unit, which forces the product into a concentric ringlayer. The process demonstrates its true strengths wherever liquids must be efficiently distributed at high to very high throughput rates. The use of ringlayer mixers is also interesting in terms of cost-effectiveness and versatility.

The mixing unit of a ringlayer system rotates with circumferential speeds of up to 50 m/s. As a result, the product components are accelerated through centrifugal force. This causes a ringlayer to be formed. Within this concentric layer there are enormous differences in speed between the rapidly rotating mixing tools and the stationary container wall. As a consequence, friction is particularly high in the ringlayer profile. During the subsequent process the specially shaped tools of the mixing unit move the product through the mixing chamber in a pattern similar to plug flow. Because this happens very rapidly, residence times are very short with a narrow residence time deviation.

Lödige offers the high-performance CoriMix® (CM) ringlayer mixer in a variety of sizes as both laboratory and production mixers. Depending on the product, throughput of up to 0.50 m³/h can be achieved in a laboratory setting and up to 500 m³/h in production, with an effective volume of between 5 and 3,000 litres. The consistently compact design enables high performance densities to be obtained.

From mixing to coating – and almost everything in between

The individual application-specific design of each individual machine means that a wide variety of processes can be implemented cost effectively. The spectrum ranges from mixing, dispersing, de-agglomerating, wetting, gluing, paste production, densifying, granulating, agglomeration, dissolving and melting. The CoriMix® is thus the perfect choice for the production of moist mixtures and suspensions, as well as for coating primary particles and producing fine agglomerates of small particle sizes within a narrow granularity range.

The CoriMix® can easily be connected to a continuous KM Ploughshare® mixer to produce a dry mix with many components and the highest mixing quality. In the CoriMix®, liquid components are fed directly into the product ringlayer separately from the dry components. This ensures very even distribution within the mixture. Liquids can be added in two different ways:

When materials are added externally, they are introduced by means of feed pipes, which are installed in the drum wall and project into the product layer. When materials are added internally, the liquid is guided through a rotary device via a hollow shaft to reach specially perforated tools and is thus fed

directly into the mixing material ring. Both additive techniques avoid wetting the shaft and the mixer wall, preventing product adhesion.

The system also allows the mixing chamber to be divided into zones of different shearing intensity. This enables the process to be adapted to varying product characteristics.