Small Vibrating Sieve Machine For Very Fine Herbal Dry Powder

Small vibrating sieve for very fine herbal dry powder is a screening equipment designed for the characteristics of fine particle size (up to 300 mesh or more), easy agglomeration, and poor fluidity of herbal powder. It is often used to screen out impurities, classify or control particle size distribution. Small vibrating screens usually adopt a multi-layer screen structure to achieve fine screening at different levels. 

The upper screen first intercepts larger particle impurities, the middle screen screens out fine powder that meets the particle size requirements, and the lower screen further separates the very fine powder. Generally, one to three layers of screen structures are used, which can achieve 2 to 4 levels of particle size classification at the same time. The mesh size of the screen is selected according to the fineness of the powder, and the common range is between 100 mesh and 500 mesh.

Applicable equipment types

Three-dimensional rotary vibrating screen: a small vibrating sieve most commonly used for herbal powder screening, suitable for 80-500 mesh fine powder screening. The screen vibrates vertically and rotates horizontally, with high screening accuracy. Common models are 400, 600, and 800. For extremely fine powder (such as above 200 mesh), it is recommended to use 600 or above, with a fine mesh and a pinball cleaning structure.

Ultrasonic vibrating screen: used to screen extremely fine herbal powders above 300 mesh, such as Panax notoginseng powder, Ganoderma lucidum powder, etc. An ultrasonic device is added to the ordinary rotary vibrating screen to make the screen vibrate 38,000 times per second. It can significantly reduce the phenomenon of fine powder blocking the screen, improve screening efficiency and accuracy, and is suitable for 300-600 mesh materials.

Airflow screen is suitable for particularly fine, light, and hygroscopic herbal powders, such as pearl powder, mint powder, etc. The powder is sent into the cylinder through high-speed airflow and graded and screened under the action of rotating blades. It has high screening efficiency for ultrafine powders and almost no clogging problem. It is suitable for materials with a mesh size of 300-1000.

Technical Specifications of Small Vibrating Sieve for Very Fine Herbal Dry Powders

Model	Effective screen diameter	Applicable mesh range	Configuration recommendations	Suitable scenarios
400 type rotary vibrating screen	φ320mm	80～300 mesh	Single or double-layer screen	Small batch screening, laboratory
600 type rotary vibrating screen	φ560mm	80～500 mesh	Can add ultrasonic	Fine herbal powder screening
Airflow screen φ320	φ260mm	300～800 mesh	Cyclone separation device + dust removal port	Extra-fine powder such as pearl powder, Ganoderma lucidum spore powder, etc.

Recommended mesh number of small vibrating sieve for very herbal dry powder

General herbal powder: preliminary screening of ordinary Chinese medicine powders and granules, or scenes with low requirements for particle size uniformity (such as some decoction raw materials), suitable for herbal dry powder with good fluidity and not easy to agglomerate (such as astragalus, white atractylodes, etc.). It is recommended to use 100-300 mesh, which is suitable for three-dimensional rotary vibrating screen;

Ultrafine herbal powder (such as Ganoderma lucidum spore powder, pearl powder): high-end Chinese medicine preparations (such as dripping pills, nano-grade powders), external powders (such as mask powders) or raw materials that need further processing, separation of fine particles, requiring strong anti-clogging ability of the screen. It is recommended to use 300-500 mesh, and it is recommended to use ultrasonic vibrating screen to prevent clogging;

Ultrafine powder (such as Chinese medicine extract powder ground to micron level): scientific research experiments, nano Chinese medicine preparation or special dosage forms, requiring extremely narrow particle size distribution. It is recommended to use 400-800 mesh, and air flow screen can be used to improve screening efficiency.

What can small vibrating sieves be used for in the very herbal dry powder industry?

In the very herbal dry powder industry, small vibrating sieves are mainly used for fine screening, impurity removal and grading of materials. Taking Panax notoginseng powder, Ganoderma lucidum powder, Astragalus powder, etc. as examples, after the herbs are crushed or dried, fiber debris, coarse particles or lumps are often mixed in. The small vibrating sieve can effectively remove them and improve the purity and taste of the product. In the production of capsules, granules, granules and other preparations, the original powder is often pre-treated by this equipment to ensure uniform particle size, which is conducive to the stability of subsequent mixing, tableting or packaging processes.

In addition, after the herbs are finely extracted or micronized (such as pearl powder and Ganoderma lucidum spore powder above 300 mesh), the small vibrating sieve can also achieve accurate classification of powders of different particle sizes, and divide different particle size intervals through one or more layers of sieves for packaging or purification of products with different uses. The equipment is small in size and is suitable for pharmaceutical workshops, laboratories, store-type processing points and other places with high requirements for space, cleanliness and ease of operation. It is widely used in multiple subdivided application scenarios such as Chinese medicine powder production, health product processing and meal replacement raw material processing.

How to choose a small vibrating sieve for very herbal powder

When choosing a small vibrating sieve for very herbal powder, you should consider the powder particle size, fiber content and screening accuracy requirements. For most very Chinese medicine powders (such as above 100 mesh), the three-dimensional rotary vibrating screen is suitable for general screening. It has a compact structure and high screening efficiency, and is suitable for small batch processing; if the powder is light, easy to adsorb or the screen is easy to clog, it is recommended to use an ultrasonic vibrating screen. Its high-frequency vibration can effectively prevent the screen from clogging and improve the screening accuracy. It is especially suitable for herbal micro powders above 300 mesh; if the powder is extremely light and the particle size is extremely fine (such as above 400 mesh), and the screening efficiency is strictly required, you can consider the airflow screen, which pushes the powder through the screen through the airflow, which is suitable for powders with low viscosity and good fluidity. In general, the three-dimensional rotary vibrating screen is suitable for most conventional Chinese medicine powders, the ultrasonic screen is suitable for high-precision and easy-to-block materials, and the airflow screen is suitable for very and low-yield applications.

A small vibrating sieve is a device used to separate and screen materials, especially suitable for processing fine-grained materials such as very herbal powder. It uses a vibration mechanism to move the material on the screen surface, thereby achieving functions such as screening, grading and dehydration. This equipment is very practical in the herbal processing industry and can improve the consistency and quality of the product. If you have specific material, screening accuracy or production capacity requirements, you can also customize the screen specifications and motor power according to actual conditions. If necessary, we can provide you with common small vibrating sieve suppliers and equipment parameter tables.