• Double-layer filter cloth horizontal vacuum belt filter—used in the mineral processing industry for handling feldspar powder and lepidolite.
  Filter Type: Horizontal Vacuum Belt Filter
  Application industry: Mineral processing
  Material description: Feldspar powder, Lepidolite
  Filter cloth model: 15P
• Filter cloth manufacturer: Xiadis

In the complex systems of mineral processing, filtration often serves as a critical step that determines both product quality and energy consumption levels. Particularly in the beneficiation of non-metallic minerals such as feldspar powder and lepidolite, as well as new-energy mineral resources, the efficiency of solid-liquid separation not only affects recovery rates but also directly impacts the stability of subsequent processes, including drying, roasting, and acid leaching. Among the various filtration equipment available, the horizontal vacuum belt filter—thanks to its advantages of continuous operation, large processing capacity, and high degree of automation—has become one of the main pieces of equipment used in the dewatering stages for feldspar powder and lepidolite.

However, the core factor that truly determines filtration performance lies not only in the equipment itself but also in the performance and structural design of the filter cloth that is matched to it. As a leading enterprise in China’s research and manufacturing of filtration materials (mesh belts), Xiamen Xiadis Filter Materials Technology Co., Ltd. We are providing more targeted filter cloth solutions for the mineral processing industry.

I. Technical Challenges in the Filtration Process of Feldspar Powder and Lepidolite

1.  Characteristics of feldspar powder filtration

Feldspar powder is widely used in industries such as ceramics, glass, and building materials; during ore dressing, it typically needs to undergo grinding. — Grading — Flotation — Concentrate — Filtering and other steps. Its characteristics are:

• Wide particle size distribution with a high proportion of fine particles;
• The slurry concentration fluctuates significantly.
• There are clear requirements for the moisture content of the filter cake.
• The filter cake tends to cake up easily, and the discharge requirements are high.

During the operation of a horizontal vacuum belt filter, if the filter cloth structure is improperly designed, problems such as pore blockage, reduced air permeability, and slower filtration rates are highly likely to occur.

2.  Difficulties in Lithium Mica Filtration

Lepidolite is an important source of lithium resources for new energy applications. As the lithium-ion battery industry rapidly develops, the scale of ore processing is expanding swiftly. Its filtration characteristics are becoming increasingly complex:

• High fine-grain content;
• The slurry contains residual chemicals.
• pH The value fluctuates significantly;
• Strict control over metallic ion impurities.

Under these operating conditions, the filter cloth must not only exhibit excellent filtration accuracy but also ensure good air permeability and anti-clogging performance, while also possessing strong acid-alkali resistance and mechanical strength.

II. Technical Requirements for Filter Cloth in Horizontal Vacuum Belt Filters

A horizontal vacuum belt filter is a continuous filtration device in which the filter cloth runs synchronously with the conveyor belt and achieves solid-liquid separation under the action of a vacuum chamber. This places higher demands on the filter cloth:

1. Strong structural stability
   The filter cloth must operate under prolonged tension without any deformation, wrinkling, or deviation.
2. Breathability and Retention Balance
   It must ensure smooth passage of the filtrate while effectively retaining fine particles.
3. Superior wear resistance
   The filter cake continuously rubs against the equipment drum, posing a challenge to the abrasion resistance of the filter cloth.
4. Easy to clean and with excellent regenerative performance
   In conjunction with the online washing system, the filter cloth must have excellent cleaning and recovery capabilities.

If the filter cloth is improperly selected, it will lead to a decrease in vacuum degree, a slowdown in filtration rate, an increase in moisture content of the filter cake, and even a shortened overall service life of the equipment.

III. Xiadis’s Technological Advantages in the Field of Mineral Processing Filter Cloth

Among domestic filter cloth manufacturers, Xiamen Xiadias Filtration Materials Technology Co., Ltd. has been deeply engaged in industrial filtration technology for over three decades, focusing on the R&D and production of filtration material (mesh belt) fabrics. The company is one of the drafting units of the industry standard for belt filter machine filter belts.

1.  Independently developed weaving technology

Xiadis boasts a complete weaving system and an R&D team with advanced technological expertise, enabling it to optimize fabric structure design according to the specific characteristics of different mineral types, including:

• Single-layer and double-layer structural design;
• Separate design for the surface layer and the support layer;
• Control aperture uniformity and opening ratio;
• Improve the flatness of the filter cloth surface.

In the process involving feldspar powder and lepidolite, by optimizing the weaving structure, we can achieve more stable filtration accuracy and higher filtration rates.

2.  Enhanced anti-clogging and regenerative performance

To address the issue of fine particles easily clogging pores, Xadias focuses on surface smoothness and drainage channel design in its fabric structure, enabling the formation of a uniform filter cake and enhancing initial filtration efficiency.

Combined with an online high-pressure washing system, the filter cloth can quickly regain its air permeability, thereby extending its service life.

3.  Customized operational capability

The ore-dressing process is complex and variable, and the feldspar powder and lepidolite from different mining areas differ in terms of particle size distribution, slurry concentration, and reagent systems. Xadias can perform analyses based on customer site data:

• Laboratory simulated filtration testing;
• Filtration rate and moisture content calculation;
• Custom processing (edge trimming, hole punching, glue brushing, etc.);
• Provide comprehensive selection solution recommendations.

This customization model, centered on operating conditions, truly makes filter cloth... “ System solution ” a part of it, rather than merely a consumable.

IV. The Impact of Filtration Efficiency on Beneficiation Performance

On the mineral processing production line, improving filtration efficiency will trigger a series of cascading effects:

• Reduce the moisture content of the filter cake to lower subsequent drying energy consumption.
• Increase the processing capacity per unit of time;
• Reduce the frequency of filter cloth replacement;
• Improve resource recovery rate.

Taking the lepidolite project as an example, under the same equipment conditions, optimizing the filter cloth structure can effectively increase the filtration rate and reduce the moisture content of the filter cake, thereby ensuring more stable operation of the entire production line.

Against the backdrop of intensifying competition for lithium resources and growing pressure to control costs, optimizing filtration systems is becoming a key strategy for mining companies to enhance their profit margins.

V. The Rise of Domestic Filter Cloth Brands

In the past, high-end mine filtration fabrics have long relied on imported brands. However, in recent years, domestic enterprises have continuously made breakthroughs in weaving technology, material development, and quality control.

Xiamen Xiadis Filter Materials Technology Co., Ltd., leveraging its independently developed R&D capabilities and large-scale production system, has served multiple sectors including new energy minerals, non-metallic minerals, and metallurgical mining. Its products are not only widely used in the domestic market but are also exported to numerous countries and regions overseas.

In “ Reduce costs and increase efficiency ” Today, as it has become an industry consensus, domestically produced high-performance filter cloths are increasingly becoming the preferred choice for mining enterprises.

VI. Future Trends: Filtration Technology Is Evolving Toward Greater Precision and Systematization

As the new energy industry expands rapidly, demand for resources such as lepidolite continues to grow. Mineral processing technologies are evolving toward greater efficiency, automation, and lower energy consumption.

Future filtration technologies will exhibit several trends:

1. Higher precision and higher throughput coexist;
2. The filter cloth structure is more refined.
3. Higher compatibility with the device system;
4. Smart monitoring and lifespan management are gradually becoming more widespread.

Under this trend, filter cloth enterprises not only need to provide products but also must possess system-solving capabilities and continuous R&D expertise.

Conclusion

In the beneficiation process of feldspar powder and lepidolite, the horizontal vacuum belt filter is a critical piece of equipment, while the filter cloth is the key factor determining the filtration performance. Only by truly understanding the mineral characteristics and process requirements can we achieve efficient, stable, and low-cost solid-liquid separation.

As a leading domestic manufacturer of filter fabrics, Xiamen Xiadis Filter Materials Technology Co., Ltd. is leveraging technological innovation and customized services to help the mineral processing industry enhance filtration efficiency and resource utilization.

In the context of an era where new energy and mining upgrades are advancing in parallel, every advancement in filtration technology will unlock greater value potential for the efficient exploitation of resources.