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Jun 25, 2025
In the production process of feed-grade phosphate, phosphate rock reacts with sulfuric acid to produce wet-process phosphoric acid and calcium sulfate gypsum. The reaction slurry then enters a belt filter for solid-liquid separation:
Phosphate slurry → Belt Filter → Phosphoric Acid Filtrate + Gypsum Cake
This filtration process involves challenging operating conditions, including:
Acidic slurry containing gypsum particles
Continuous operation of belt filter equipment
Requirements for stable filtration performance and long service life
During long-term operation, filter cloth must provide excellent filtration efficiency while maintaining acid resistance, tensile strength, dimensional stability, and mechanical durability.
In phosphate production, filter cloth plays a critical role not only in solid-liquid separation but also in maintaining stable and continuous operation of the entire process.
With optimized material selection and advanced manufacturing technology, Bolian belt filter cloth provides the following advantages:
Monofilament woven structure delivers excellent anti-blinding performance and maintains high filtration throughput during continuous operation.
Excellent cake release performance reduces residual filter cake, improves filtration efficiency, and increases production capacity.
The calendering creates well-formed gypsum filter cakes with lower adhesion. During scraper discharge, the cake can be removed smoothly, leaving less gypsum residue on the filter cloth surface. This helps reduce filtration resistance caused by cake buildup and extends filter cloth service life.
High strength and dimensional stability ensure reliable performance under continuous belt operation.
Excellent tensile and tear resistance allows the filter cloth to withstand long-term tension without damage. Advanced heat-setting technology minimizes thermal shrinkage, preventing elongation, and wrinkling, while reducing equipment adjustment and maintenance.
Selecting the right filter cloth is essential for improving phosphoric acid recovery efficiency, reducing downtime, and maintaining stable production.
Bolian specializes in the development and manufacturing of industrial filtration fabrics. Based on different equipment types and operating conditions, Bolian provides customized filter cloth selection, structural optimization, and filtration solutions for the phosphate industry, helping customers achieve more efficient and reliable solid-liquid separation.
