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The use of filter cloth in the phosphoric acid industry - vacuum belt filter cloth - re-filtration of phosphogypsum processing, phosphogypsum
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Detailed Description
- Use of filter cloth in the phosphoric acid industry - vacuum belt filter cloth - re-filtration of phosphogypsum, phosphogypsum
Xiamen Citius Industrial Filter Cloth On-site Operating Case Pictures:
Filter type: Horizontal vacuum belt filter press
Application industry: Phosphate chemical industry
Material description: Re-filtration of phosphogypsum, phosphogypsum
In-depth application of industrial filter cloth in phosphogypsum treatment: Re-filtration solution for vacuum belt filter
With the continuous expansion of the scale of the phosphate chemical industry, Phosphogypsum As one of its main by-products, the annual output has been increasing year by year. However, how to achieve the resource utilization and environmentally friendly treatment of phosphogypsum is still one of the bottlenecks restricting the high-quality development of the industry. In recent years, Vacuum belt filter The widespread application in phosphogypsum dehydration and re-filtration provides an efficient path for its reduction, harmlessness, and utilization. As the core medium in the filtration process, The performance of the industrial filter cloth directly determines the efficiency and economy of the treatment system 。
Challenges of phosphogypsum treatment
Phosphogypsum is a by-product generated during the production of wet-process phosphoric acid, the main component of which is dihydrate gypsum ( CaSO ₄ · 2H ₂ O ), and it is also mixed with unreacted phosphoric acid, fluorine, heavy metals, radioactive elements and other impurities. Its treatment difficulties include:
- High water content, difficult dehydration;
- Acidic liquid residue, strong corrosiveness to equipment and materials;
- Wide particle size distribution, easy to block the filter medium;
- Reuse requires low impurity content and uniform and stable filter cake.
Therefore, from preliminary dehydration to the re-processing stage of fine filtration, higher requirements are put forward for filtration equipment and filter cloth.
Vacuum belt filter: Ideal equipment for phosphogypsum re-filtration
In the phosphogypsum treatment process, the vacuum belt filter, with its Continuous, efficient, and highly automated Advantages, is widely used in:
- Re-filtration and fine dehydration after preliminary dehydration Re-filtration and fine dehydration after preliminary dehydration ；
- Grading filtration of phosphogypsum with different particle sizes Grading filtration of phosphogypsum with different particle sizes ；
- Multi-stage washing and impurity removal to improve product purity;
- The water content of the filter cake is reduced to <10% ，making it easy for subsequent stacking, transportation or reuse (such as gypsum powder for building materials);
Equipment features such as: continuous operation, stable vacuum suction, automatic filter cloth cleaning, adaptability to slurry concentration fluctuations, especially suitable for difficult-to-dehydrate medium and fine particle materials.
Filter cloth: Easily cope with the phosphogypsum " Delicate challenge ”
In the re-filtration process of phosphogypsum, the filter cloth must not only be acid and corrosion resistant, but also cope with the Continuous interception efficiency and Good drainage performance Selecting the appropriate industrial filter cloth is the key to ensuring the system's operating efficiency and filter cake quality.
Xiamen Citius (Xiamen Citius) Filter cloth: Optimized design for phosphogypsum
Xiamen Citius (Xiamen Citius) Environmental Protection Filtration Technology Co., Ltd., with thirty years of experience in the research and development and manufacturing of filtration materials, has continuously cultivated the phosphate chemical industry. Its filter cloth products, specially designed for vacuum belt filters, are widely used in first-line projects for phosphogypsum treatment and have the following core advantages:
- Excellent acid resistance and dimensional stability The filter cloth material has undergone special finishing treatment, is resistant to phosphoric acid, sulfuric acid and other strongly acidic residual liquids, and does not deform during long-term operation;
- High-efficiency particle interception capability Aiming at the characteristics of high proportion of fine powder and weak permeability in phosphogypsum, double-layer structure weaving or coating enhancement technology is adopted to effectively prevent particle penetration;
- Good dehydration and stripping performance The filter cake is uniformly formed, which is convenient for automatic unloading and recovery, and reduces the operating resistance caused by adhesion;
- Supports high-frequency regeneration cleaning The filter cloth design is convenient for high-pressure jet washing system maintenance, with a longer service life and lower total cost;
Application results example:
In a waste residue resource utilization project of a certain phosphate fertilizer enterprise, Xiamen Citius (Xiamen Citius) Filter cloth is used with a vacuum belt filter for the impurity removal and re-filtration stages of phosphogypsum, achieving:
- The water content of the filter cake is reduced from the original 18% to 12%；
- The impurity content has decreased by more than 35% and can be used in the building materials industry;
- The filter cloth has been in continuous operation for over 1800 Hours without replacement, significantly reducing maintenance frequency;
Promoting the resource utilization of phosphogypsum " A crucial step ”
With the policy level's increasing encouragement of " Three wastes ” Treatment and comprehensive resource utilization, the clean treatment and high-value application of phosphogypsum have broad prospects. In this process, High-performance industrial filter cloth is not just a filtration medium, but a bridge between process efficiency, product quality, and green goals 。
Xiamen Citius (Xiamen Citius) Will continue to drive industrial upgrading through technological innovation, helping phosphatic chemical enterprises move towards a path of green and circular development.
If you need further filter cloth selection suggestions or case matching, please contact us:
- 📧 Email: wyl@citius-filter.com
- 📞 WhatsApp: +86-13950107241
- 🌐 Official Website: www.citius-filter.com
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