A leaf filter filter cloth based on PA material and a preparation method thereof
By using a multi-layered structure and modification treatment of PA material filter cloth, the problems of poor alkali resistance, easy aging, easy adhesion, and rapid flux decay of traditional filter cloth in alumina production are solved, thereby improving the stability and durability of the filter cloth and reducing production costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Filing Date
- 2026-06-10
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional leaf filter cloths have poor resistance to alkali hydrolysis in the alumina production process. The fibers are prone to aging and breakage. The surface of the filter cloth is rough and easy to adhere. The filtration flux decays quickly, the pressure stability is poor, it is easy to bulge and deform, the fatigue resistance is weak, and it needs to be replaced frequently, resulting in high production costs.
The filter cloth made of PA material includes an anti-sticking filter surface layer, a fine interception middle layer, a high-strength base fabric layer, an elastic support interlayer, and a bonded wear-resistant bottom layer. It is shaped by a bidirectional double-line equidistant quilting structure, combined with hydrophobic anti-sticking and alkali-resistant sealing modification treatment, to form a gradient filtration and support system.
It achieves easy peeling of red mud filter cake, non-clogging of mesh, non-deformation under high pressure, stable filtrate compliance, and resistance to bending and cracking, thereby reducing production costs and replacement frequency.
Smart Images
Figure CN122402017A_ABST