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Oct 25, 2023
Phosphogypsum is an industrial solid waste produced in the wet process of phosphoric acid, which is mainly composed of calcium sulfate dihydrate (CaSO₄-2H₂O) and contains impurities such as undecomposed phosphorite, residual phosphoric acid, fluoride, organic matter and heavy metals. As the core component of the equipment, the phosphogypsum filter cloth must have the following characteristics to meet the complex operating conditions.
The phosphogypsum filtrate contains corrosive components, the filter cloth material should be selected from polyester, polypropylene and other corrosion resistant materials to ensure stable operation.
Phosphogypsum particles in phosphoric acid working conditions cause a certain amount of wear on the filter cloth surface, which requires the filter cloth to have a certain level of abrasion resistance.
Phosphogypsum filter cloth pore size selection can retain small particles (such as phosphogypsum crystals).
Monofilament filter cloth with smooth surface and moderate porosity, combined with twill or plain weave, reduces cake adhesion and improves water permeability and drainage efficiency.
The above characteristics combine the core requirements of corrosion resistance, high-precision filtration, anti-clogging and long service life to provide a technical guarantee for the safe treatment of phosphogypsum.
In the production process, BOLIAN filtration materials are strictly implemented according to the process, and each process is carefully tested according to ISO9001 to ensure that each batch of products, each filter cloth meets the quality inspection standards.
