1. Project Background:
A large phosphate fertilizer enterprise adopts wet process phosphoric acid technology, which generates a large amount of calcium sulfate dihydrate (commonly known as phosphogypsum) slurry during the reaction process.. It is necessary to efficiently separate phosphogypsum crystals from phosphoric acid solution and wash the filter cake multiple times to recover residual P ₂ O ₅ and improve the yield of phosphorus.

II. Challenges and Needs:

Strong corrosive environment: The material contains phosphoric acid, fluorosilicic acid, etc., with an extremely low pH value, and equipment corrosion prevention is the primary challenge..

Efficient washing: Multi stage countercurrent washing is required to achieve the highest P ₂ O ₅ yield with the lowest washing water volume.

Large processing capacity: The production line has a large scale and requires the filter machine to have high load continuous operation capability..

Gypsum treatment: The separated phosphogypsum needs to reach a certain moisture content to facilitate subsequent transportation, storage, or comprehensive utilization..

3、 Nuclear Xu Solution:
We provide  PBFHorizontal Belt Vacuum Filter  Enhanced anti-corrosion and washing models:

1.Full process anti-corrosion: Components in contact with materials are lined withrubberor316Lultra-low carbon stainless steelmaterial, with additional reinforcement in critical areas to ensure the long-term service life of equipment in strong acid environments..

2.Multi stage countercurrent washing system: equipped with 3 to 4 washing devices, precise control of washing water volume and distribution, maximizing washing efficiency, and increasing effective phosphorus yield to over 99.2%..

3.High strength filter belt: Select a dedicated single fiber filter belt suitable for acidic environments, with long service life and easy cleaning..

4.Large scale design: Based on customer production capacity, provide large-scale equipment with a filtration area of120square metersto ensure single line processing capacity..

Fourth, Application Effect and Customer Value:

1.Economic benefits: Through efficient washing, hundreds of tons of P2O5 can be recovered annually for the enterprise.? The value is significant.

2.Stable production: The equipment has strong corrosion resistance and an annual operating time of over 8000 hours, ensuring the stability of the main process..

3.Environmental compliance: The filtrate is clear and returned to the system for recycling.; The produced phosphogypsum provides a good foundation for subsequent resource utilization.