In modern industrial production, solid–liquid separation is a critical process step across industries such as mineral processing, chemical engineering, new energy, metallurgy, and environmental protection. As the core component of the entire filtration system, the performance of the filter medium directly impacts production efficiency, product quality, and operating costs. In recent years, with the widespread adoption of vertical plate-and-frame pressure filters (tower-type filters), the filter cloths used in these systems have increasingly become the focus of attention for many enterprises, owing to their high efficiency, energy savings, and advanced automation.

As a leading domestic manufacturer of industrial filtration materials, Xiamen Citius Filtration Materials Technology Co., Ltd. With a long-standing focus on the R&D and manufacturing of industrial filtration fabrics, our vertical plate-and-frame filter cloth products are widely used across numerous industries, including mining, alumina production, phosphate chemistry, new energy, lithium‑ion battery materials, and fine chemicals, providing customers with reliable, high‑efficiency solid–liquid separation solutions.

Vertical plate-and-frame filter press — an essential piece of equipment for solid–liquid separation in modern industry.

The vertical plate-and-frame filter press, also known as the vertical filter or tower-type filter, is a highly efficient filtration device that has seen rapid development in recent years. Its operating principle is similar to that of conventional plate-and-frame filter presses, relying on high-pressure squeezing to achieve solid–liquid separation; however, it offers distinct advantages in terms of automation, filtration efficiency, and continuous operation capability.

During operation, the slurry is first pumped into the individual filtration chambers. Under a specified pressure, the liquid passes through the woven filter cloth and is discharged, while solid particles are retained on the filter cloth surface, forming a filter cake. Once the filter cake reaches the set thickness, it can be washed, subjected to secondary pressing, and discharged according to process requirements. The entire process features a high degree of automation and enables continuous, stable operation.

Compared with conventional filtration equipment, the vertical plate-and-frame filter press offers the following advantages:

• Automatic feeding and automatic discharging, reducing manual intervention;
• Online fabric washing function enhances the equipment’s continuous operating capability.
• It occupies a small footprint, making it well-suited for large-scale production line layouts.
• High filtration pressure enables a lower moisture content in the filter cake.
• Particularly suitable for filtering fine particles and high-viscosity materials;
• Energy conservation and consumption reduction result in lower operating costs.

With the development of the new energy and new materials industries, vertical plate-and-frame filter presses have become essential equipment in sectors such as lithium‑ion battery materials, alumina production, and phosphate chemical processing.

Vertical filter press filter cloth — a critical factor determining filtration performance

Many users believe that the filter press determines the filtration performance, but in fact, what directly participates in the filtration process is… Woven filter cloth 。

Filter cloth not only performs the task of solid–liquid separation but also influences:

• Filtration rate;
• Clarity of the filtrate;
• Filter cake thickness;
• Cake moisture content;
• Filter cake removal performance;
• Online cleaning performance;
• Service life;
• Enterprise operating costs.

It can be said that a filter cloth with stable performance often enables the vertical plate-and-frame filter press to fully leverage its performance advantages.

What properties should the filter cloth of a vertical plate-and-frame filter press possess?

Since vertical plate-and-frame filter presses typically operate under high-pressure, continuous‑operation conditions, they place more stringent demands on the filter cloth.

I. High Filtration Precision

The filter cloth must effectively retain fine particles, ensuring a clear filtrate and minimizing product loss.

For industries such as alumina, lithium‑ion battery materials, and phosphate chemicals, filtration accuracy directly affects product quality and production stability.

II. Excellent Water Permeability

Filtration rate is a key parameter determining the equipment’s production capacity.

Filter cloths must maintain excellent water permeability while ensuring filtration accuracy, enabling rapid liquid flow and enhancing processing capacity per unit time.

III. Excellent dimensional stability

The vertical plate-and-frame filter press operates continuously under high-pressure conditions.

If the filter cloth lacks dimensional stability, it is prone to:

• Elongation and deformation;
• To wrinkle;
• Off course;
• Poor sealing;

Thus affecting the filtration performance.

Therefore, high-quality filter fabrics must undergo rigorous stabilization treatment to ensure long-term dimensional stability.

IV. Excellent Tensile Strength

Vertical plate-and-frame filter presses operate at relatively high pressures, and their filter cloths are subjected to substantial mechanical tension over extended periods.

Therefore, the following are required:

• High tensile strength;
• Good tear resistance;
• Strong resistance to fatigue.

Only in this way can the requirements for long-term, continuous operation be met.

V. Excellent Wear Resistance

The filter cloth experiences prolonged friction against the filter plates and the filter cake.

If the wear resistance is insufficient, it can easily lead to:

• Aperture variation;
• Local wear;
• Material leakage;
• Service life is shortened.

Therefore, wear resistance is also an important criterion for evaluating filter fabrics.

VI. Excellent Regenerative Capacity

After a period of use, the pores of the filter cloth become clogged with fine particles.

If the permeability cannot be restored, it will result in:

• Filtration rate decreases;
• Pressure increases;
• Increased energy consumption;
• The replacement frequency has increased.

Therefore, high-quality filter cloths for vertical plate-and-frame filter presses must possess excellent regeneration capabilities.

By employing an optimized weaving structure and processes such as calendering and high-temperature setting, the surface condition of the filter cloth can be effectively improved, enhancing its cake‑release performance. This allows the filter cloth to regain good filtration efficiency after washing, thereby extending its service life.

Product Advantages of Citius Vertical Filter Press Filter Cloth

As a specialized manufacturer of industrial filtration materials, Xiamen Xiadidas has conducted ongoing R&D tailored to the operating conditions of vertical plate-and-frame filter presses, continuously optimizing fabric structures and production processes to ensure its products can withstand demanding industrial environments.

The products are primarily manufactured from materials such as PET and PP, and the appropriate model can be selected based on the specific operating conditions.

The product has the following features:

High interception accuracy

It can stably retain fine particles, thereby improving product yield.

Excellent permeability

Maintain high filtration efficiency and shorten the filtration cycle.

Good dimensional stability

After high-temperature setting, it remains dimensionally stable even under prolonged operation.

Strong tensile strength

Meets the demanding requirements of high-pressure filtration operations.

Excellent wear resistance

Suitable for continuous operation, enhancing service life.

Good discharge performance

The filter cake detaches easily, reducing the need for manual cleaning.

Strong regenerative capacity

After cleaning, it can restore its filtration performance, thereby reducing operating costs.

Widely used across multiple industries.

Thanks to its reliable product performance, Citius vertical filter press filter cloths have been widely adopted across numerous industries.

Mining industry

Used for dewatering concentrates and tailings, it enhances pulp‑handling efficiency and reduces transportation costs.

Aluminum oxide industry

It is suitable for filtering red mud and intermediate slurry in the alumina production process, enhancing production stability.

Phosphorus chemical industry

It is widely used for solid–liquid separation in the production of phosphates, phosphogypsum, and related chemical products.

Lithium-ion new energy industry

In recent years, integrated non-metallic vertical plate-and-frame filter presses have seen rapidly growing adoption in the lithium‑ion battery materials industry.

Vertical filter cloths can be used for filtration and dewatering in the production of lithium‑ion battery cathode and anode materials, precursors, and other key components, providing reliable support for the new‑energy industry.

Fine chemical industry

Suitable for the filtration of fine chemical products such as catalysts, inorganic salts, and functional materials.

Environmental protection industry

It can be used in industrial sludge treatment and other solid–liquid separation processes to enhance resource utilization efficiency.

Choose a professional filter cloth manufacturer to create greater value for your business.

Although industrial filter fabrics are classified as consumable equipment, their performance directly impacts a company’s production efficiency and overall costs.

A professional filter cloth manufacturer not only delivers products of consistent quality but also leverages its extensive industry expertise to provide tailored filtration solutions that align with specific material characteristics, filtration pressures, equipment models, and process requirements.

Xiamen Xiadidas consistently places product quality at the heart of its operations, continuously enhancing its R&D capabilities and manufacturing standards to provide customers with stable, reliable industrial filtration materials. This helps enterprises improve equipment operating efficiency, extend filter cloth service life, and reduce overall operating costs.

Conclusion

As industries such as mining, chemical processing, and new energy continue to evolve toward greater efficiency and environmental sustainability, vertical plate-and-frame filter presses will play an increasingly vital role across a broader range of applications, while high‑quality filter cloths for these presses will serve as an essential foundation for ensuring stable equipment operation.

As a leading domestic manufacturer of specialized industrial filtration materials, Xiamen Citius Filtration Materials Technology Co., Ltd. We will continue to deepen our expertise in the industrial filtration sector, relentlessly enhancing the performance of our vertical plate-and-frame filter press cloths. By delivering more efficient, durable, and reliable filtration solutions to industries such as mining, alumina production, phosphate chemicals, lithium‑ion batteries, and new materials, we aim to work hand in hand with our customers to drive ongoing advancements in industrial solid–liquid separation technology.