Special Flours / Protein Shifting

The worldwide nutritional demand for plant-based proteins is increasing enormously. The main sources are soybeans, wheat or peas. More often, regional crops such as faba beans are being taken into consideration.

Semimanufactured products are amongst others protein-enriched flours or isolates using wet- or dry processes or a combination of both.

NETZSCH focuses itself on protein shifting by dry grinding. This process, taken from classical flour production, is being used successfully to process legumes such as yellow peas, faba beans, mung beans or chickpeas.

The aim of the process is to gain a protein-rich fraction by fine-grinding and classifying, in which the amount of protein is considerably higher than in the original product.

Application Example Legumes

Processing step 1 – Production of refined flour

Ideally the cleaned legumes are dehulled prior to the protein shifting process to a residual portion of < 1 %. The refining serves to break the cell structure and to isolate the relatively large starch granules from the smaller protein granules. Depending on the product, the proteins have a particle size of < 3 µm, whereas the starch granules range from 3 to 40 µm.

Most important for the subsequent separation, is that during grinding, the difference in size between the protein and starch granules remains as large as possible. Care must be taken to not damage the starch granules in the process. The most effective and gentle way to achieve this is through impact grinding in a NETZSCH Classifier Mill, model CSM.

 

Processing step 2 – Efficient separation using a high-efficiency classifier, model CFS/HD-S

The resulting refined flour has a particle size between 40 and 70 µm and is then separated into a high-protein and low-protein fraction. This is a range that brings conventional sifting to its limits. For this reason, the fractioning for protein shifting is carried by dynamic air classifiers.

The NETZSCH High-Efficiency Fine Classifier, model CFS-HD/S is used to achieve the highest yields with a minimal loss of protein in the high-starch fraction.

As opposed to conventional classifiers, this classifier is highly compact and is equipped with a guide vane cage for most efficient dispersion and separation – the decisive advantages when viewing the economics of protein enrichment!

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Solutions for Dry- and Wet Processing in Production and Laboratory Areas

Molienda en Seco

Molienda en Seco

Productos & Soluciones en el campo de Molienda en Seco

Molino clasificador CSM

Este molino de impacto cuenta con un clasificador dinámico por aire, integrado en la cámara de molienda, que permite la producción de partículas finas con un tamaño máximo definido y limitado. Gracias al proceso de clasificación interna de las partículas gruesas, se consigue un proceso más eficiente desde el punto de vista energético y de estabilidad, si se compara con un sistema con circuito de clasificación externo. Se emplea para finuras desde 10 a 150 µm (d97).

Tamaños de máquina desde 1.5 a 250 kW y volúmenes de aire de aprox. 50 - 26.000 Nm³/h.

Clasificador fino de alta eficiencia CFS/HD-S

Algunos productos exigen para su correcta aplicación que el punto de corte sea realmente fino y que haya una separación nítida de tamaños. Estos requerimientos no suponen ningún problema para nuestros clasificadores finos de alta eficiencia tipo CFS/HD-S.

El producto a clasificar se predispersa al máximo para poder optimizar claramente el punto y la agudeza del corte objetivo.

Disponible para finuras desde 2,5 a 60 µm (d97).

Tamaños de máquinas disponibles para un volumen de gas de aprox. 50 a 16.000 Nm³/h.

Clasificador fino de alto rendimiento InlineStar

Este nuevo clasificador fino se ha concebido para combinarlo con un molino "agua arriba". Con la integración directa del clasificador InlineStar tras el molino, se obtiene una planta de molienda/clasificación en continuo que disminuye la necesidad de otros componentes de la planta.

Disponible para límites de separación desde 2,5 a 60 µm (d97).

Tamaños de máquina disponibles para un volumen de gas de aprox. 350 a 2.600 Nm³/h.