Chemical Powder Screening Machine

 

What is a chemical powder screening machine?

Chemical Powder Screening Machine is specialized equipment designed for screening, separating, and classifying chemical powders. They come in various types like ultrasonic, explosion-proof, and standard three-dimensional screens, each tailored to handle specific powder properties—such as flammability, corrosiveness, or agglomeration. Equipped with features like anti-clogging systems, corrosion-resistant materials (316L stainless steel, PTFE), and precise mesh sizing (2-500 mesh), they ensure efficient, safe, and accurate processing. Widely used in pharmaceuticals, battery production, and chemical manufacturing, Chemical powder screening machines play a key role in maintaining product purity and meeting industry standards.

How to select screening equipment based on the characteristics of chemical powders?

Selection Based on Equipment Characteristics

This part introduces the characteristics and applicable scenarios of different types of chemical powder screening machines to provide guidance for selecting equipment based on actual needs.

 
Standard three-dimensional screens: They have a stable structure and are suitable for the screening needs of most conventional chemical powders. The multi-layer screen design can realize simultaneous classification of multiple specifications, with a medium processing capacity, and are suitable for scenarios with certain requirements for screening efficiency and precision.
 
Ultrasonic screens: They have significant advantages in dealing with fine powders, micro-powders, and agglomeration-prone powders. They can effectively solve the problem of screen blockage, have high screening precision, and are suitable for ultra-fine powder processing with strict requirements on classification precision.
 
Explosion-proof vibrating screen (rotary vibrating screen and sway screen): specially designed for flammable and explosive environments. It adopts explosion-proof structure from the motor to the shell, which can operate safely under the working conditions with potential explosion risks and ensure production safety. 

Selection Based on Material Characteristics

 
This section focuses on matching appropriate screening equipment according to the specific properties of chemical powders to meet their unique screening requirements.
 
For flammable and explosive powders: Use explosion-proof screens (such as rotary vibrating screens and swing screens) equipped with ATEX/IECEx certified components, adopt sealed housings, and have nitrogen inerting functions.
 
For powders with high purity requirements: Select chemical powder screening machines made of highly inert materials such as 316L stainless steel, Hastelloy, polytetrafluoroethylene (PTFE), or polypropylene (PP), such as standard three-dimensional vibrating screens or ultrasonic vibrating screens.
 
For agglomeration-prone powders: Adopt ultrasonic screens with a frequency of 38KHz or higher, which can break up clumps and improve the screening effect.
 
For corrosive powders: Upgrade the contact parts to corrosion-resistant alloy materials or use PP/PTFE linings. Standard three-dimensional screens and ultrasonic screens perform well in such applications.
 
For powders requiring ultra-fine classification: Rely on ultrasonic chemical powder screening machines equipped with high-precision electroformed screens to achieve accurate particle size classification.
 
For sensitive powders: Utilize the high tightness of ultrasonic screens to protect heat-sensitive and easily oxidizable powders.

What are the advantages of using chemical powder screening machine to screen chemical powders?

Using chemical powder screening machine allows for precise selection based on powder characteristics, achieving efficient, safe, and high - quality screening:

Precise Classification: According to the particle size distribution requirements of chemical powders, ultrasonic vibrating screens combined with high - precision electroformed screens can achieve ultra - fine classification at the micrometer or even nanometer level, meeting the production needs of high - end materials.

Safety and Reliability: For hazardous chemical powders such as flammable, explosive, and toxic ones, explosion - proof vibrating screens with explosion - proof designs and fully enclosed structures prevent accidents. When dealing with corrosive powders, screening machines made of special corrosion - resistant materials ensure production safety.

Contamination Avoidance: In industries with high purity requirements, such as pharmaceuticals and electronics, standard three - dimensional vibrating screens and ultrasonic vibrating screens, made of highly inert and non - leaching materials, prevent equipment - induced contamination of materials and ensure product quality.

Solving Agglomeration Problems: For easily agglomerated and electrostatically sensitive chemical powders, the high - frequency vibration of ultrasonic vibrating
screens can eliminate inter - particle forces, prevent screen mesh clogging, and improve screening efficiency.
 

How do chemical powder screening machines work?

Straight - Through Vibrating Screens: Materials fall vertically into the center of the screen mesh. Under low - angle vibration, qualified powders quickly pass through the mesh and are discharged directly, while large impurities slide to the outlet along the screen surface. It can complete rough screening in 5 seconds, making it suitable for high - flow preliminary screening.

Standard Three - Dimensional Vibrating Screens: A vertical motor drives the screen body to perform a three - dimensional spiral motion. Powders move forward in a parabolic trajectory on the screen surface. Vibration causes fine particles to sink and contact the screen mesh, and qualified particles pass through the mesh precisely. Multi - layer screens can output coarse, medium, and fine powders simultaneously.

Ultrasonic Vibrating Screens: Based on standard vibration, an ultrasonic generator transmits 38KHz high - frequency waves to the screen mesh. The ultrasonic waves break up powder agglomerates, eliminate electrostatic adsorption, and increase the screening efficiency of ultra - fine powders by 80%.
 

Parameter

Model	Diameter (mm)	Feeding Size (mm)	Frequency (RPM)	Layers	Power (kw)	Capacity (kg/h）
DH-400	400	<10	<1500	1-5	0.18	100
DH-600	600				0.25	200
DH-800	800				0.55	500
DH-1000	1000				0.75	800
DH-1200	1200				1.1	1200
DH-1500	1500				1.5	1800
DH-1800	1800				2.2	2000

 
 

In which specific scenarios are they applied?

 

The application of chemical powder screening machines covers multiple fields, and different screens are selected according to the characteristics of materials in various scenarios to achieve efficient and safe screening.

Pharmaceutical intermediate production: Ultrasonic screens are used to finely screen powders with a particle size of 10 - 50μm to ensure that the purity of raw materials meets pharmaceutical standards.

Chemical pigment production: Standard three-dimensional screens are used to classify 20 - 100 mesh pigment powders to ensure uniform color of products.

Battery material processing: Explosion - proof screens are adopted to process flammable and explosive positive electrode material powders, which not only meet the requirement of removing more than 95% of impurities in coarse screening, but also can eliminate potential safety hazards through the sealed design.

Screening of flocculant powder for water treatment: Straight - through screens are relied on to complete coarse screening, quickly separate more than 80% of agglomerated materials, and improve dissolution efficiency.

 

Why Are Vibrating Screens the Ideal Solution for Chemical Powder Screening Challenges？

Chemical powders, as the core raw materials and product forms, directly determine the performance of end products. Precise control of particle size distribution is crucial for ensuring the quality of chemical powders. However, chemical powders possess complex physical and chemical properties such as flammability, explosiveness, high reactivity, and strong corrosiveness, which make the screening process a significant challenge in production. Conventional screening equipment often fails to meet the requirements for handling these special materials. In contrast, vibrating screens, with their targeted designs, have become the ideal choice for screening chemical powders and play an indispensable role in industrial production

How is the material screening effect reflected?

The material screening effect is mainly reflected in the removal rate of impurities and the accuracy of particle size classification, with specific data showing the performance of coarse and fine screening.
 
Coarse screening can remove more than 95% of large particle impurities in the powder. For example, in the preliminary treatment of chemical raw materials, it can effectively separate foreign matters with a particle size of more than 5mm, ensuring the continuity of subsequent processing. Fine screening can achieve more than 98% accurate particle size classification. For instance, when screening 200 - mesh ultra - fine chemical powder, the proportion of powder within the target particle size range can reach 98.5%, meeting the strict requirements of high - end electronics, pharmaceutical and other fields for powder purity. Different chemical powder screening machines have their own focuses in screening effect. The ultrasonic vibrating screen performs prominently in fine screening, which can control the particle size deviation within ±1%. The standard three - dimensional vibrating screen, in the coarse screening process, has a stable processing capacity, and the screening efficiency can reach 1 - 5 tons per hour, taking both efficiency and precision into account.

 
Our factory's Chemical Powder Screening Machines can accurately screen 2-500 target chemical powders. The coarse sieve can remove more than 95% of large particles of impurities, and the fine sieve can make the powder account for more than 98.5% of the target particle size range. Its processing capacity covers 100kg - 10 tons / hour, is equipped with a vibrating motor, made of carbon steel, 304 stainless steel or 316L stainless steel, with a diameter of 400 - 1500mm, and a 1-4-layer screening layer design can flexibly adapt to different needs. Whether it is agglomerated powder or a corrosive powder, it can be processed efficiently, and the ultrasonic model can increase the screening efficiency of ultrafine powder by 80%. At the same time, we can provide customized equipment services to meet diversified production needs according to your specific requirements for material characteristics, production capacity and screening layer count.