• Industrial filter cloth, horizontal vacuum belt filter, feldspar filtration in the mining industry, mica filtration
  Filter type: Horizontal vacuum belt filter
  Application industry: Ore dressing
  Material description: Feldspar, mica
  Filter cloth model: 15P, 1029A

Application of industrial filter cloth in horizontal vacuum belt filter in ore dressing —— Taking the dehydration treatment of feldspar and lepidolite as an example

I. Background Overview

With the rapid development of new energy and new materials industries, the efficient utilization of lithium resources and related minerals has become an important direction for the global mining industry. Among them, Lepidolite As one of the important lithium resource minerals, its mining and selection needs continue to rise. At the same time, Feldspar As a key raw material for the ceramics, glass, and coatings industries, it also plays an important role in ore dressing processes.

In the ore dressing process, a large amount of fine-grained mineral pulp needs to be dehydrated and solid-liquid separated through efficient filtration equipment. Horizontal vacuum belt filter Due to its continuous operation, high processing capacity, and good dehydration performance, it is widely used in the dehydration treatment of non-metallic minerals such as feldspar and lepidolite. The core filtration medium supporting this equipment —— Industrial filter cloth Its performance directly determines the material dehydration quality, filter cake dryness, filtrate clarity, and equipment operating efficiency.

This article will systematically analyze the key role of industrial filter cloth in ore dressing filtration, combine the material characteristics of feldspar and lepidolite ore dressing, discuss the application scenarios of horizontal vacuum belt filters, and share relevant filter cloth selection and technical practice cases.

II. Basic Requirements of the Ore Dressing Industry for Filtration Processes

The solid-liquid separation process in the ore dressing industry usually includes concentration, filtration, and washing. Among them, the main goal of the filtration process is to achieve the following indicators:

• The moisture content of the filter cake is controlled within the range that can be transported or further processed ；
• High filtrate clarity, maximizing the recovery of clean water or mother liquor ；
• Continuous and reliable equipment operation, long filter cloth replacement cycle ；
• Strong adaptability to fine particles, preventing blockage and penetration 。

Feldspar and lepidolite minerals are usually in a fine-grained suspended state during ore dressing, with high concentration, strong viscosity, and large material differences, posing high challenges to the filtration system.

III. Working Principle and Advantages of Horizontal Vacuum Belt Filter

（ 1 ）Working principle

A horizontal vacuum belt filter is a continuous operation, suction filtration equipment. Its core structure is:

• Upper running filter cloth;
• A vacuum chamber is located below;
• Cooperating with the conveyor belt and vacuum pump to form a negative pressure zone.

After the mineral pulp is evenly spread on the surface of the filter cloth by the cloth spreader, it is completed under vacuum suction:

• Liquid removal (dehydration);
• Filter cake washing;
• Drying and dehydration;
• Filter cake removal;
• Filter cloth cleaning and recycling.

（ 2 ）Equipment advantages

• Continuous filtration, suitable for large-scale mineral pulp dehydration;
• Uniform filter cake formation, adjustable thickness;
• Multi-stage washing can be achieved to improve resource recovery rate;
• The filter cloth can be recycled, and automatic cleaning reduces manual intervention.

For fine minerals such as feldspar and lepidolite, horizontal vacuum belt filters can achieve high dryness and low solid content in the filtrate, making them one of the commonly used dehydration equipment in ore dressing plants.

IV. The Key Role of Industrial Filter Cloth in This System

1.  Filtration and support medium

Industrial filter cloth is the core of the filtrate channel and is also the supporting layer for mineral pulp and filter cake formation. Its Filtration accuracy, structural strength, abrasion resistance, and hydrophilicity Are crucial to filtration performance.

2.  Filtrate permeability and backwashing ability

In the continuous suction filtration process, the filter cloth must have good Permeability and anti-blocking ability And be able to withstand high-frequency backwashing or high-pressure spray cleaning.

3.  Mud cake peelability and cleaning cycle

Feldspar and lepidolite filter cakes are usually sticky and easy to adhere to the surface of the filter cloth. The anti-stick treatment or single-filament structure on the surface of the filter cloth can effectively improve the peeling effect and extend the service life of the filter cloth.

4.  Mechanical and chemical stability

Ore dressing slurries often contain acids, alkalis, organic reagents, and other chemical substances. The filter cloth must have good corrosion resistance and tensile strength to adapt to 24 Hours of continuous operation.

V. Application Advantages of Xiamen Xiadias Filter Cloth in the Ore Dressing Industry

As a national high-tech enterprise in the filtration material technology textile industry, Xiamen Xiadias Filtration Materials Technology Co., Ltd. Provides a series of belt vacuum filter cloths specifically designed for the mineral processing industry, particularly optimized for the dehydration process of feldspar and lepidolite.

1.  Targeted development of special filter cloth structure

• Multi-layer composite woven structure Combining support and precision filtration;
• Upper single-filament reinforced layer Improving filtrate permeability and filter cake release;
• Wear-resistant base fabric in the bottom layer Extending service life and supporting high-frequency friction.

2.  Excellent anti-clogging ability

The filter cloth has a uniform porosity and excellent self-cleaning performance. It is not easily clogged under negative pressure filtration and maintains a stable liquid flow rate.

3.  High-strength wear-resistant design

The filter cloth, after heat setting and shrinkage treatment, has higher dimensional stability and can maintain stable tension for a long time under continuous operation without deformation.

4.  Suitable for various filtration equipment

Xiamen Xiadias filter cloths are suitable for horizontal vacuum belt filter machines from mainstream domestic and international brands. We support customized designs based on drawings, on-site measurements, and provide services such as installation, edging, punching, and belt processing.

VI. Typical Case Sharing: Lepidolite Dehydration Project Application

A lepidolite processing plant originally used imported filter cloths, which had problems such as poor filter cake separation, short filter cloth life, and frequent clogging. After switching to Xiadias customized filter cloths, the operating results have significantly improved:

• Filter cake dryness increased to 80% or more;
• The filter cloth service life has increased from the original 2~3 months to 6 months or more;
• More complete vacuum suction, filtrate clarity meets standards;
• Water consumption per ton of slurry reduced 15% resulting in significant energy saving and consumption reduction.

The customer highly praised Xiadias filter cloths for their adaptability to high-intensity operation, high-corrosion environments, and fine particles and plans to further expand the scope of cooperation.

VII. Conclusion

With the accelerating trend of refined and high-value utilization of mineral resources, the importance of filtration technology is becoming increasingly prominent. Especially when processing fine minerals such as feldspar and lepidolite, high-performance industrial filter cloths for horizontal vacuum belt filter machines have become an important choice for mineral processing enterprises to improve efficiency, optimize processes, and reduce energy consumption.

Xiamen Xiadias will continue to take technological innovation as its core, focusing on the filtration pain points in the mineral processing industry, providing diversified filter cloth solutions and full-process technical services to help global mining enterprises move towards a green, efficient, and intelligent future.