For a long time in the past, solid-liquid separation of nanopowder suspensions has been a critical challenge in the materials industry, the fine chemical industry, and even the semiconductor industry. “ Pain point process ” One of the key points is that as particles shrink to the micro- and nanoscale, they become increasingly likely to form stable suspension systems. Traditional filtration equipment often proves inadequate when dealing with nanoparticles. —— The filter cannot remove impurities effectively, has a low retention rate, the filter cake is difficult to detach, washing is challenging, energy consumption is high, and there’s even a risk of secondary pollution caused by the addition of chemicals.

It is precisely against this broad backdrop that a technology has emerged—one capable of directly handling micron- and nanoscale powders and achieving separation. — Washing — A new integrated drying equipment has emerged: New nanomicro-powder filtration machine It not only overcomes the technical bottlenecks that have long plagued conventional filtration processes, but also provides a standardized solution for producing powder materials with higher purity and greater added value.

I. Solid-Liquid Separation of Nanopowders: What Exactly Makes It So Difficult?

Nanoscale powder particles, as small as tens of nanometers, exhibit strong adsorption to water and undergo vigorous Brownian motion, making them difficult to handle using conventional methods. “ sieve ”、 “ Pressure ”、 “ Centrifugal ” and other methods for direct interception.
Commonly used devices, such as:
 

• Plate-and-frame filter press Limited filtration accuracy, difficult to control the filter cloth pore size at the nanometer level, and incomplete washing.
• Centrifuge : More suitable for larger particle sizes, with high energy consumption.
• Ceramic membrane filter High cost, prone to clogging, and experiencing significant flux decline.
• Deep filtration system : Additives are required; not suitable for material industries that demand high purity.

These devices can all handle micron-sized powders, but they often fall short when it comes to true nanoscale powders. “ With difficulty ” , cannot “ High quality ”。

As the new materials industry enters the era of ultrafine particles, the market urgently needs a solution that can... Truly addressing nanoscale particles The next-generation filtration equipment.

II. Breaking Through Traditional Solutions: A New Nanomicro-Powder Filtration Machine

The core value of this device can be summarized by four keywords:

1.  Direct separation of micron- and nanoscale particles with a retention rate as high as 99. The concentration of effective particulate matter in the filtrate can reach PPM levels.

The most critical breakthrough comes from its Preparation technology for filtration media with independent intellectual property rights , the maximum interception accuracy can reach 25 nm。
This means:
 

✔   Nano-powders do not require the addition of flocculants.
✔   Particles can achieve true meaning. “ Simple physical separation ”
✔   The interception accuracy is stable and does not degrade with changes in filtration time.
✔   The flux is more stable and less prone to clogging than ceramic membranes.
 

For industries that prioritize material purity, this is extremely important.

2.  Pure physical filtration, no chemicals required, no secondary pollution.

Many nanopowder separation processes often require the addition of additives to enhance sedimentation or agglomeration efficiency; however, this comes with the following consequences:

✘   Decrease in powder purity
✘   Difficult to clean afterward
✘   Cause secondary pollution
✘   Cannot meet the requirements for electronic materials.

The new nanomicro-powder filter uses A purely physical filtration method driven by compressed air , achieving control over nanoscale powders “ Additive-free interception ” Greatly enhances product purity and environmental protection standards.

3.  Integrates filtration, washing, and drying into one step, shortening the process and delivering better results.

Traditional equipment typically requires:

Filter machine → Washing machine → Drying system → Artificial transfer

Not only is the process lengthy, but each step could potentially cause contamination.

This device integrates in one go:

• Solid-liquid separation
• Filter cake washing (customizable wash liquid)
• Compressed air drying
• Automatic unloading

Complete the entire process in a closed environment, significantly reducing human intervention.

The result is:

✔   The liquid is clear and transparent.
✔   The filter cake has low moisture content.
✔   The filter cake is easy to peel off.
✔   The product is cleaner and more stable.
✔   Lower overall energy consumption

It truly delivers what powder manufacturing companies have always been seeking. —— Efficient, continuous, clean, and automated 。

4.  Low energy consumption, continuous operation capability, and a high degree of automation.

Pneumatic-driven +  The special material flow channel opening technology enables the equipment to maintain consistent flux without being affected like ceramic membranes. “ The more you filter, the slower it gets. ”。

In conjunction with the automatic control system, it can achieve:

• Automatic pressure adjustment
• Real-time traffic control
• Automatic cleaning and regeneration
• Automatic material discharge
• Fault Diagnosis

Its operating costs are lower than those of most precision filtration equipment, making it suitable for large-scale industrial production.

3. Scope of Application: Covers all mainstream micro- and nano-powder systems.

1.  Industrial Powder Raw Materials (Non-Metallic Minerals)

For example:

Talc, heavy calcium carbonate, quartz, wollastonite, kaolin, mica, graphite, and others.

Although the particle sizes of these powders are mostly in the micrometer range, under the trend toward ultrafine and nanoscale processing, their filtration requirements are increasingly approaching those of nanoscale systems.

2.  Industrially synthesized powder

Silicon carbide, corundum, diamond, silicon nitride, precipitated silica, titanium dioxide, and others.

These materials are generally hard and have fine particle sizes, causing significant wear on filtration equipment. The stability of the filter media in new equipment provides an ideal solution to this issue.

3.  Micro- and nanoscale metal powders

Nano nickel powder, silver powder, copper powder, aluminum powder, iron powder, zirconium powder, titanium powder, and others.

Widely used in:

• Metal ink
• Solder paste
• Electronic paste
• Magnetic materials
• Catalyst

Such products must ensure powder purity; new equipment... No additives, no pollution Features are particularly important.

4.  Micro- and nano-oxide systems

Such as aluminum oxide, zinc oxide, iron oxide, titanium oxide, nickel oxide, silicon oxide, and others.

Widely used in industries such as ceramics, electronic materials, and catalyst supports.

4. Working Principle: A Closed-Loop Filtration System Based on Precision Filter Media

The entire process can be summarized as:

( 1 ) Feeding

The slurry is pumped to the filtration chamber via a diaphragm pump, and the entire process is fully enclosed.

( 2 ) Filtration and Separation

Compressed air maintains a stable pressure, allowing the slurry liquid to pass through the filter medium and be discharged, while solid particles form a filter cake on the surface of the filter membrane.

Key technology:
✔   The filtration medium can achieve a retention accuracy of: 25 nm
✔   Surface modification technology enables controllable opening of material flow channels.
✔   Ensure stable and non-declining filtration flux.

( 3 Compressed air pressure maintenance

Stable pressure ensures rapid dewatering and reduces the moisture content of the filter cake.

( 4 Dedicated cleaning process

The cleaning solution is quantitatively added into the chamber and then discharged through a filter membrane via compressed air, truly achieving:

• No dead angles
• Recyclable and washable
• The powder is purer.

( 5 Compressed air drying

The filter cake dries rapidly, reducing energy consumption during subsequent drying.

( 6 ) Automatic plate opening and unloading

The filter cake falls off naturally, clean, fast, and pollution-free.

V. Summary of Core Advantages

🔹   Can directly handle nanoscale powders ( 25 nm Level)

Precision that is difficult to achieve with traditional equipment.

🔹   Pure physical filtration, requiring no chemical agents.

Particularly suitable for electronic materials, semiconductors, and fine chemical powders.

🔹   Filtering +  Washing +  Dry three-in-one

Reduce two transfers and one drying equipment investment.

🔹   High throughput,不易 clogging, and capable of continuous operation.

Significantly reduce overall production costs.

🔹   Fully enclosed system, high cleanliness, high safety

Suitable for industries with extremely high requirements for product purity.

Conclusion: A new industrial era of nanomaterial powder filtration is dawning.

Nano-powders not only form the foundation of the new materials revolution but also serve as a critical support for industries such as electronics, energy, medical materials, and advanced ceramics. Breakthroughs in the filtration process will directly determine the purity and ultimate performance of these materials.

With its advantages of high precision, high cleanliness, automation, and low energy consumption, the new nano- and micro-powder filtration machine is replacing traditional solid-liquid separation processes and is becoming the standard in the new materials industry. “ Next-generation standard equipment ”。