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Dextrin powder must meet the required particle-size and quality specifications before it reaches packaging. Yet, lumps, as well as particles that do not fit into the specification, will spoil the consistency of the powder. Moreover, fine, low bulk density powder becomes harder to screen.
Dextrin powder screening helps manufacturers separate lumps and oversized particles before packaging. When choosing the screening system, manufacturers should also consider dust generation, product withdrawal, production capacity, and the location where the screening process can take place.
Dextrin is usually manufactured through starch roasting under the specific conditions of processing. The powder can be screened to eliminate lumps and other particles after processing, prior to packing.
These unwanted particles in the final product will affect its uniformity, and result in the final product falling short of the required particle size.
An appropriately selected screening system helps separate material according to the required mesh size. The intent is to ensure separation is achieved while providing a steady material flow and avoiding unnecessary material loss.
Apart from lump removal, there may be other challenges that manufacturers have to consider while screening dextrin powder.
When choosing a dextrin screening machine, these factors need to be taken into account with the mesh size and separation requirements.
Screening equipment selection is determined by the powder properties, flow rate, separation requirements and process arrangement.
The customer employed two traditional Vibro Separators to de lump and purify before packaging in one dextrin manufacturing application. The problem was that the low bulk density dextrin powder produced dust during screening, which caused waste of the material. The current solution called for two separators to achieve the production rate.
After assessing the application, Galaxy Sivtek recommended an enclosed Twin Roto Sifter with two screening chambers. The documentation of this installation showed it to be an effective solution to the dusting problem, saved material waste in that use and gave an increased production rate on less floor space than the two conventional sifters.
The experience highlights why manufacturers should assess dust containment, throughput, material recovery, and equipment footprint—not just particle-size separation—when choosing a screening system.
Read the dextrin manufacturer case study to understand the application challenges and reported results.
The selection of the screening system will depend on the process as well as the material to be screened.
In certain cases, the use of a centrifugal screening system like Twin Roto Sifter is advisable, especially if increased throughput is necessary and pre-screening is required. However, the appropriateness of the equipment should be evaluated after taking into consideration the required mesh size, feed rate, the properties of the powder, and installation conditions of the equipment.
Other screening combinations may be suitable for other applications. As an example, the screening of dextrin powder was performed at Galaxy Sivtek using Super Sivtek Separator as one of many available options to separate lumps and unwanted particles from dextrin powder.
Rather than selecting equipment based on the material name alone, manufacturers should evaluate the actual powder, required separation, production target, and operating conditions before finalizing a solution.
The screening of dextrin powder is essential in helping the manufacturers eliminate unwanted particles and lumps prior to packaging. But getting the separation is just one part of the equation. Other factors that may affect equipment selection include the amount of dust, material waste, production capacity, and floor space available.
A combination of these requirements can help manufacturers determine a screening setup that suits their process and production needs.
