Powder Sieving

Stainless steel wire mesh plays a vital role in the field of powder screening due to its high strength, wear resistance, corrosion resistance, high temperature resistance, easy cleaning, good dimensional stability, non-toxic and pollution-free characteristics. It is especially suitable for application scenarios with high requirements for precision, hygiene and durability, such as ceramic proppants (ceramsite sand), medicines, quartz sand, etc.

The core advantages of stainless steel wire mesh in the field of powder drying:

1. Excellent mechanical strength: It can withstand the impact, friction and material accumulation pressure during the screening process, and is not easy to deform and break.

2. Excellent wear resistance: Especially for powders with higher hardness (such as quartz sand and ceramic proppants), the life of stainless steel mesh is significantly longer than that of nylon, polyester and other materials.

3. Excellent corrosion resistance: Stainless steels such as 304 and 316L can withstand a variety of chemical substances (acids, alkalis, solvents) and environmental corrosion, ensuring long-term reliability and the purity of the screened materials.

4. Good temperature resistance: It can adapt to process requirements such as high temperature drying and high temperature sterilization (such as pharmaceutical production).

5. High surface finish and non-toxicity: It meets food and pharmaceutical grade requirements (such as FDA, GMP), is not easy to adsorb materials, and is easy to thoroughly clean and sterilize to prevent cross contamination.

6. Accurate and stable aperture: The weaving process is mature, the mesh size is accurate and stable, and the consistency of classification accuracy is ensured.

7. Long life and low overall cost: Although the initial investment may be higher than that of synthetic fiber screens, its ultra-long service life and extremely low maintenance and replacement frequency make the long-term overall cost more advantageous.

Application of stainless steel wire mesh in different powder screening fields:

1. Screening of ceramic proppants (ceramsite sand):

Application scenario: In the production process of ceramsite sand for oil fracturing, the sintered particles need to be graded according to a strict particle size range (such as 20/40 mesh, 30/50 mesh, 40/70 mesh, etc.).

Function of stainless steel wire mesh:

High wear resistance: Ceramsite sand has high hardness (Mohs hardness can reach 7-8), which greatly wears the screen. 316L stainless steel mesh is the first choice due to its excellent wear resistance.

High-precision classification: Precise mesh ensures that the proppant particle size distribution meets the API standard, which directly affects the fracturing effect.

Impact resistance: Withstands the impact of large particles and vibrating screens.

High temperature resistance: Adapts to the screening of high-temperature particles after sintering (high temperature resistant models must be selected).

Easy to clean: The residual dust after screening is easy to clean, reducing contamination between batches.

Common specifications: Multi-layer composite screen (coarse, medium and fine combination) or high-strength single-layer screen, mostly made of 304 or 316L, the mesh range is usually between 10 mesh and 100 mesh, selected according to the target particle size.

2. Screening of drugs (APIs, excipients, intermediates):

Application scenarios: Classification and removal of API powders; screening and impurity removal of excipients (such as lactose and starch); particle size control of intermediates; homogenization of particles before tableting.

The role of stainless steel wire mesh:

Compliance: 316L stainless steel is the preferred material in the pharmaceutical industry, meeting the strict requirements for equipment contact parts (no precipitation, non-toxic, resistant to cleaning disinfectants).

Sanitary and clean: The surface is smooth and has no dead corners, it is not easy to breed microorganisms, and it is easy to CIP (online cleaning)/SIP (online sterilization).

High precision: Ensure that the particle size distribution of active ingredients or excipients of drugs meets the pharmacopoeia standards, affecting solubility, bioavailability and tableting performance.

Corrosion resistance: Tolerant to various cleaning agents (acids, alkalis), disinfectants (such as ethanol, hydrogen peroxide, ozone) and some organic solvents.

Pollution-free: Avoid fiber shedding and contamination of drugs.

Common specifications: High-precision woven mesh (plain or twill), the material is mainly 316L, with a wide range of meshes, from dozens of meshes (removing large pieces) to hundreds of meshes (fine grading/removing impurities). Material certification and surface roughness report are often required.

3. Quartz sand screening:

Application scenarios: In the fields of glass manufacturing, casting, water treatment filter materials, ceramics, building materials, etc., natural or processed quartz sand needs to be graded according to different particle sizes (such as coarse sand, medium sand, fine sand).

The role of stainless steel wire mesh:

Extreme wear resistance: Quartz sand has high hardness (Mohs hardness 7) and is a very abrasive material. High carbon steel or stainless steel (such as 304, 316L, sometimes more wear-resistant models or surface hardening treatment) is the key to resisting its wear.

High load-bearing capacity: Withstand the heavy pressure and vibration of a large amount of sand and gravel.

Weather resistance: Adapt to various indoor and outdoor environments.

Precise grading: Ensure that sand for different uses (such as glass raw materials require specific particle sizes, water treatment filter materials have grading requirements) meets the specifications.

Anti-blocking: Reasonable weaving methods (such as twill) help particles pass through and reduce blockage.

Common specifications: According to the processing capacity and particle size requirements, woven meshes with different wire diameters and apertures are selected, and the mesh ranges from a few meshes (coarse screen) to hundreds of meshes (fine screen). Heavy or thickened stainless steel screens are often used.

Precautions for using stainless steel wire mesh in powder screening:

1. Accurate selection: According to material properties (hardness, particle size, humidity, corrosiveness), screening accuracy requirements, processing capacity, equipment type (vibrating screen, drum screen, etc.), working environment (temperature and humidity, corrosive media), select appropriate materials, wire diameters, apertures (mesh), weaving methods and structures.

2. Correct installation and tensioning: Uniform and appropriate tension is the key to ensuring screening efficiency and screen life. Insufficient tension can easily cause the screen to sag, block holes, and channel materials; excessive tension can easily cause the screen to fatigue and break prematurely.

3. Standard operation: Control the feed amount evenly to avoid overload impact.

4. Timely cleaning and maintenance: Regularly clean the residual materials and blockages on the screen. Check the wear of the screen and replace it in time. Avoid using hard objects to scratch and damage the mesh surface.

5. Storage: Store in a dry and ventilated place to avoid extrusion, deformation or contact with corrosive substances.

Stainless steel wire mesh is an ideal and reliable solution for powder screening, especially for processing high-wear (ceramic proppants, quartz sand) and high-sanitation materials (pharmaceuticals). Its excellent physical and chemical properties ensure the efficiency, precision, durability and cleanliness of the screening process. When choosing, be sure to combine the specific application requirements, focus on the material (preferably 316L for harsh environments), wear resistance, precision and structural design (multi-layer composite mesh for heavy loads), and cooperate with standardized installation, use and maintenance to maximize its value and reduce the overall operating cost. Dashang Wire Mesh specializes in the production of stainless steel mesh square mesh with various mesh sizes and a large number of stock specifications for you to choose from!