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Phosphorus Chemical Industry Phosphogypsum Filter Cloth – Horizontal Vacuum Belt Filter Machine – Filter Cloth Manufacturer
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A New Chapter in Chemical Filtration: High-Efficiency Solutions for Phosphogypsum Dewatering
—— Co-innovation of Horizontal Vacuum Belt Filter with Dedicated Filter Cloth
In the chemical industry, Solid-liquid separation Has always been the key to the process. For phosphorus chemical enterprises, phosphogypsum ( Phosphogypsum )’s handling and resource utilization are not only an essential step in the production process but also a core challenge in achieving green and sustainable development.
In recent years, as “ Dual-Carbon Strategy ” And “ Using waste to treat waste ” The advancement of the concept, horizontal vacuum belt filter machine Horizontal Vacuum Belt Filter, HVBF ) System solutions paired with high-performance filter cloths are increasingly becoming the preferred technological approach for dewatering and washing phosphogypsum.
I. Sources of Phosphogypsum and Filtration Challenges
Phosphogypsum is a byproduct of the phosphoric acid production process, with its main components being Calcium sulfate dihydrate CaSO ₄ · 2H ₂ O ） , while also containing small amounts of free acids, fluorides, heavy metals, and soluble salts.
Every time it's produced 1 Ton of phosphoric acid, scheduled for production 4.5 ～ 5 Tonnes of phosphogypsum. Its characteristics are:
- The particles are fine, with most having a particle size concentrated in 10–50 μm ；
- High in moisture content and high in viscosity;
- Highly acidic, it is corrosive to equipment and filter cloths.
These characteristics determine that phosphogypsum dewatering not only requires The equipment features a reasonable structure and stable vacuum level. , even more so The filter cloth boasts excellent chemical resistance, anti-clogging properties, and high water permeability. 。
II. Technical Advantages of the Horizontal Vacuum Belt Filter Machine
As a continuous filtration device, the horizontal vacuum belt filter ( HVBF ) It is widely used in the phosphate chemical industry due to its efficiency, stability, and ability to achieve multi-stage washing.
1. Continuous operation
The material completes the entire process of filtration, washing, drying, and discharge on the running filter belt, making it suitable for large-scale continuous production.
2. High-vacuum dehydration efficiency
By utilizing a stable vacuum system, free water in the filter cake can be rapidly removed, reducing the moisture content of the filter cake to as low as 25% The following.
3. Multi-stage countercurrent washing
Can be set 1~3 Level-1 washing area, maximizing the recovery of phosphoric acid from the mother liquor, enhancing product purity while minimizing environmental emissions.
4. The process is controllable and highly automated.
System equipped PLC Control ensures fully automatic operation for functions such as filter cloth tensioning, rinsing, and material discharge, reducing manual intervention and operational maintenance costs.
III. The Critical Role of Filter Cloth in the System
Throughout the entire filtration system, Filter cloth serves as the functional interface between materials and equipment. , its performance directly affects the filtration rate, the moisture content of the filter cake, and the operational lifespan.
For phosphogypsum, a highly acidic and fine-material substance, the filter cloth must meet the following performance requirements:
- Excellent acid and alkali resistance, as well as corrosion resistance.
The filter cloth must withstand low conditions over the long term. pH Erosion by the environment and fluoride-ion-containing solutions. - High breathability with an anti-clogging structure
By using a single-strand or double-layer weaving structure, the filtrate channels are kept smooth while preventing fine particles from penetrating and causing blockages. - Good filter cake release performance
The surface of the filter cloth undergoes special smoothing treatments (such as calendering, coating, or anti-stick finishing), enabling the filter cake to quickly detach under the action of the卸料刮刀, thus maintaining filtration efficiency. - Wear-resistant and tension-resistant
Under continuous operation, the filter cloth must withstand multi-point roller friction and tensile forces; therefore, edge reinforcement and sewing techniques are crucial.
IV. Xiamen Citius' Phosphogypsum Filtration Solutions
As a leading brand in China for industrial filtration materials and belt filtration systems, Xiamen Xudias Filtration Materials Technology Co., Ltd. Xiamen Citius Filter Media Technology Co., Ltd. ) Has accumulated extensive experience in the phosphate chemical industry, providing professional filtration and separation solutions for products such as phosphogypsum, phosphates, and sodium fluorosilicate.
1. Customized Filter Cloth Series
Developed by Citiuss Phos-Series The filter cloth is specifically designed for dewatering phosphogypsum, utilizing a high-strength polypropylene monofilament base material, combined with specialized calendering and acid-resistant finishing processes.
Its features include:
- Breathability up to 2000–3000 L/m²·s ；
- The moisture content of the filter cake can be reduced. 3–5% ；
- Durability pH Scope 1–13 ；
- Continuous Operation Lifespan Enhancement 30% That's all.
2. Structural Optimization and Process Innovation
For different models HVBF Equipment that Citiuss can provide Customized overall width, hot-melt edging, and a double-layer composite filter fabric structure , ensuring stable gas permeability and resistance to deformation even under high-vacuum conditions.
3. End-to-end technical services
Citius not only provides filter cloths, but also offers Filter System Optimization Plan ：
- Filter cloth selection matched with vacuum zone design;
- Filtering speed and washing flow optimization;
- On-site commissioning and operational monitoring services.
V. Green Transformation and Filtration Upgrades in the Phosphochemical Industry
At “ Using waste to treat waste ” Under this concept, phosphogypsum is no longer regarded as waste but as a reusable resource. Through efficient filtration and dewatering, its recycling pathways include:
- Building materials : Preparation of gypsum boards and cement retarders;
- Soil Improvement : Used for saline-alkali land management and acidic soil improvement;
- Chemical Recycling : Extracting elements such as calcium, sulfur, and rare earths.
At the foundation of it all lies stability and reliability. Solid-liquid separation system 。
The combination of a horizontal vacuum belt filter and high-performance filter cloth provides phosphochemical enterprises with a solution that balances both efficiency and cost-effectiveness. Economic Efficiency and Environmental Friendliness The sustainable path.
VI. Conclusion
Dehydrating and filtering phosphogypsum is not only a technical challenge but also a crucial breakthrough for green development in the chemical industry.
From equipment to materials, from vacuum systems to filter cloth design, Xiamen Citius continuously innovates to provide global phosphochemical industry users with efficient, durable, and customizable filtration solutions.
In the future, Citiuss will continue to drive forward the chemical filtration industry toward greater efficiency, lower energy consumption, and enhanced environmental sustainability—all powered by technological innovation.
🔹 Keywords
Phosphogypsum Filter Cloth / Horizontal Vacuum Belt Filter / Chemical filtration / Phosphorus Chemical Industry / Solid-liquid separation / Xiamen Citiuss
- Phosphorus Chemical Industry Phosphogypsum Filter Cloth – Horizontal Vacuum Belt Filter Machine – Filter Cloth Manufacturer
Filter machine type: Horizontal vacuum belt filter
Application Industry: Phosphorus Chemicals
Handling Material Description: Phosphogypsum
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