Citius industrial filter cloth is used in horizontal vacuum belt filters for processing phosphogypsum in the phosphate chemical industry.
Filter type: Horizontal vacuum belt filter
Application Industry: Phosphorus Chemicals
Material Handling Description: Phosphogypsum

Application of Xadidas Industrial Filter Cloth in the Treatment of Phosphogypsum in Phosphate Chemical Processes Using a Horizontal Vacuum Belt Filter

As China’s phosphate chemical industry advances toward larger scale and greater environmental sustainability, the comprehensive utilization of phosphogypsum and its environmental management have become key priorities for the sector. As a major industrial byproduct generated during the wet-process phosphoric acid production, the efficiency of solid–liquid separation in phosphogypsum not only affects the production capacity of phosphoric acid plants but also directly impacts subsequent efforts in phosphogypsum valorization, compliance with environmental discharge standards, and overall operating costs.

In the phosphogypsum dewatering process, the horizontal vacuum belt filter (HVBF) has become the most widely used filtration equipment in wet-process phosphoric acid plants, owing to its advantages of continuous operation, thorough washing, high automation, and large processing capacity. As the core filtration medium of the horizontal vacuum belt filter, the performance of the industrial filter cloth directly determines the equipment’s filtration efficiency, filter cake quality, and operational stability during continuous operation.

As a professional manufacturer of industrial filtration materials, Citius Industrial Filter Cloth With its outstanding filtration performance, wear resistance, and long-term operational stability, it is widely used in horizontal vacuum belt filters in the phosphate chemical industry, providing a reliable filtration solution for dewatering phosphogypsum.

Phosphogypsum dewatering is an important process in the wet-process phosphoric acid production.

In the wet-process phosphoric acid production, phosphate rock reacts with sulfuric acid to form phosphoric acid, while generating large quantities of phosphogypsum as a byproduct.

The produced slurry must undergo continuous filtration to achieve:

• Effective separation of phosphoric acid solution from phosphogypsum;
• Multi-stage countercurrent washing enhances the recovery rate of P₂O₅.
• Reduce the acid content of phosphogypsum;
• Obtain a phosphogypsum filter cake that meets the requirements for storage or comprehensive utilization.

Due to the enormous volume of phosphogypsum generated, a large-scale wet-process phosphoric acid production facility must process several thousand tons, and in some cases over ten thousand tons, of slurry each day. Consequently, the filtration equipment is required to operate continuously and reliably over extended periods, placing extremely stringent demands on industrial filter fabrics.

Horizontal vacuum belt filters have become the mainstream equipment for dewatering phosphogypsum.

Compared with conventional filtration equipment, the horizontal vacuum belt filter offers the following advantages:

Strong continuous filtration capability

The equipment enables continuous feeding, continuous filtration, continuous washing, and continuous discharge, making it suitable for long‑term, stable operation in large-scale phosphate chemical plants.

High washing efficiency

Multi-stage countercurrent washing enables efficient recovery of phosphoric acid, increases product yield, and reduces raw material consumption.

High processing capacity

It can meet the high-load operating requirements of large-scale wet-process phosphoric acid production lines, thereby enhancing overall production efficiency.

High degree of automation

The equipment operates stably, facilitates centralized control, reduces manual intervention, and enhances production continuity.

However, to fully harness the equipment’s performance, it is essential to use industrial filter cloths with stable and reliable performance.

Phosphogypsum filtration places higher demands on industrial filter cloths.

Phosphogypsum slurry exhibits the following process characteristics:

• The solid particles are fine;
• The slurry has a high concentration;
• Long continuous operating time;
• Frequent washing;
• It is moderately corrosive;
• Prolonged exposure to a vacuum filtration environment.

Therefore, industrial filter cloths not only perform solid–liquid separation but must also withstand demanding operating conditions.

Filtration efficiency directly affects production capacity.

The permeability of the filter cloth determines the filtration rate.

If the filter cloth’s permeability decreases, it will result in:

• Vacuum filtration time is extended;
• Uneven filter cake thickness;
• Equipment processing capacity has declined;
• System output has decreased.

Therefore, the filter cloth must maintain long-term, stable filtration performance.

The effectiveness of filter cake washing determines the product recovery rate.

In the wet-process phosphoric acid production, multi-stage washing of the phosphogypsum filter cake is required.

High-quality filter cloth can ensure:

• The washing liquid passes uniformly through the filter cake;
• Increase the recovery rate of P₂O₅;
• Reduce residual acidity in phosphogypsum;
• Reduce resource loss.

Long-term operation demands higher standards.

Phosphorus chemical plants typically operate continuously throughout the year.

The filter cloth has been subjected to prolonged exposure:

• Vacuum chamber;
• Drive drum;
• Direction-changing roller;
• Cleaning device;

It operates in continuous cyclic mode, placing extremely high demands on the filter cloth’s wear resistance, dimensional stability, and fatigue resistance.

Application Advantages of Xadidas Industrial Filter Cloth in Phosphogypsum Filtration

In response to the continuous filtration requirements of the phosphate chemical industry, Citius has continuously refined the structural design of its industrial filter cloths, making its products better suited for horizontal vacuum belt filters.

Stable filtration performance

Citius industrial filter cloth employs a uniform weaving process, maintaining a stable pore structure and ensuring more balanced filtration resistance.

In continuous production, it can maintain a stable filtration rate and enhance the equipment’s processing capacity.

Good filter cake release performance

During the discharge process, the phosphogypsum filter cake must separate smoothly from the filter cloth.

The filter cloth’s surface structure has been optimized to facilitate complete cake release, minimize residue, and enhance equipment operating efficiency.

Excellent wear resistance

The horizontal vacuum belt filter operates continuously around the clock, with the filter cloth subjected to prolonged friction from the drum and tensile stress.

Citius industrial filter cloth boasts excellent abrasion resistance, withstands high‑frequency cyclic operation, extends service life, and reduces replacement frequency.

Good dimensional stability

During operation, the filter cloth remains flat and resists stretching, misalignment, and deformation, thereby ensuring long-term stable equipment performance and reducing maintenance requirements.

Easy to clean

The equipment is equipped with a continuous high-pressure cleaning system.

The filter cloth exhibits excellent cleaning and regeneration performance, effectively reducing the risk of clogging, maintaining consistent filtration capacity, and enhancing equipment operational stability.

Industrial filter cloth plays a crucial role in helping phosphate chemical enterprises reduce costs and improve efficiency.

For large-scale phosphate chemical enterprises, industrial filter cloth not only affects filtration performance but also has a critical impact on the overall economic efficiency of the production system.

High-performance industrial filter fabrics enable enterprises to achieve:

• Increase the filtration rate;
• Increase equipment processing capacity;
• Maintain stable vacuum filtration performance;
• Increase the phosphoric acid recovery rate;
• Reduce the frequency of filter cloth replacement;
• Reduce downtime for maintenance;
• Reduce overall operating costs.

As large-scale wet-process phosphoric acid production facilities continue to be built, companies are placing increasing emphasis on the impact of filtration media on equipment performance, and industrial filter cloths have become an essential component for ensuring continuous, stable production.

Supporting the green, high-quality development of the phosphate chemical industry

In recent years, the state has continuously promoted green manufacturing and comprehensive resource utilization in the phosphate chemical industry, setting increasingly stringent requirements for the reduction, harmlessness, and resource recovery of phosphogypsum. Stable and efficient solid–liquid separation technologies not only enhance the efficiency of wet-process phosphoric acid production but also improve the quality of phosphogypsum, providing superior feedstock for its diversified applications in building materials, road engineering, cement retarders, and other fields.

As a specialized manufacturer of industrial filtration materials, Citius will continue to deepen its expertise in the field of industrial filter cloths for horizontal vacuum belt filters, constantly enhancing product filtration efficiency, wear resistance, and operational stability. We provide reliable industrial filtration solutions to industries such as phosphate chemistry, mining, metallurgy, environmental protection, and chemical processing, helping enterprises achieve efficient production, energy conservation, reduced consumption, and green, sustainable development.