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Phosphoric Acid Filtration - Process Optimization

 

Filter media for phosphoric acid filtration
Ensure unparalleled product quality by using premium-grade filtration materials.

1. Phosphoric Acid Solutions from Markert Group

1. Phosphoric Acid Solutions from Markert Group

Markert - Presence in Phosphoric Acid Filtration

Markert has decades of expertise in the application of phosphoric acid, allowing the development of tailored textile filter media designed to optimize the performance of any filtration system.

With Markert’s customized solutions, end customers achieve notable improvements, including reduced production costs, enhanced product quality, increased productivity, and an improved safety and environmental footprint.

2. Phosphate Rock Washing - Horizontal Vacuum Belt Filter

2. Phosphate Rock Washing - Horizontal Vacuum Belt Filter

 

The concentration process aims to separate valuable minerals from unwanted gangue materials (non-minerals). Phosphoric acid is derived from apatite, commonly known as phosphate rock. To extract the phosphorus-containing components effectively, the rock undergoes grinding, washing, and a series of filtration processes, including dewatering using vacuum belt filters.

Raw Apatite (Phosphate rock)

Markert provides high-quality filter belts engineered to enhance both performance and reliability. With decades of experience in phosphoric acid applications and advanced laboratory capabilities, Markert consistently delivers customized solutions tailored to meet diverse customer needs.

Markert filter belts are characterized by:

  • Excellent dewatering performance
  • High flow rates
  • Long service life
  • Precise fabrication

Through these advanced filtration solutions, Markert helps customers reduce operating costs, enhance product quality, increase process efficiency, and improve environmental and safety standards. Trust in Markert’s expertise for optimized filtration performance in every system.

3. Phosphoric Acid Clarification

3. Phosphoric Acid Clarification

3.1. Pan-Filter (Mostly Hemi-hydrate)

Our Solutions - PPD 3115 and PPD 90314:

  • PPD 3115: standard solution for hemi-hydrate
  • PPD 90314: premium quality solution
    • Longer service life due to:
    • Greater thickness (+0.2 mm)
    • Higher tensile strength (+1100 N/5cm)
    • Thicker yarns (+0.1 mm in warp and weft)
PPD 3115 & PPD 90314

3.2. Horizontal Vacuum Belt Filter
3.2.1. Di-hydrate

Di-Hydrate Conditions:

  • Calcium sulfate hemihydrate and phosphoric acid extraction

  • Components CaSO4*0,5 H2O, Na2SiF6, AlPO4, SrSO4, FePO4

  • Weight of solid content 22 – 30%

  • Medium particle size 47,7 (10; 100) μm

  • Operation temperature 86-93°C

  • Chemistry: pH 1

DID 11137

Our Solution - DID 11137:

  • Improved service lifetime up to 40%
  • Increased fi ltration throughput up to 25%
  • Reduced residual moisture
  • Higher separation effi ciency and less solids in the filtrate
  • Tested against 2 competitors on the same plant
  • Belt width up to 4.5m

3.2.2. Hemi-hydrate

Hemi-Hydrate Conditions:

  • Calcium sulfate-Hemi-hydrate and Phosphoric Acid extraction

  • Components CaSO4*0,5 H2O, Na2SiF6, AlPO4, SrSO4, FePO4

  • Weight of solid content 25 – 33%

  • Medium particle size 80 (10; 320) μm

  • Operation Temperature 75-86°C

  • Chemistry: pH 1

  • Calcium sulfate hemihydrate and phosphoric acid extraction

Our Solution - DID 11028:

  • Hemi-hydrate Process requires: ~ 1000L/dm²min air permeability fabrics

  • DID 11028 as an alternative was successfully tested in Israel

  • Both fabrics offer:

  • High lifetime

  • Excellent filtration throughput

  • Superior filtration performance

  • Precise fabrication

  • Improved service lifetime up to 40%

4. Contaminated Water Removal and Recovery - Filter Press

4. Contaminated Water Removal and Recovery - Filter Press

Filter presses are essential for purifying contaminated process water, but they come with challenges like precise fabrication and ensuring strong filtration performance. Smooth cake discharge, in particular, plays a critical role in maintaining efficiency and reliability.

Markert Group stands out as a leading manufacturer of filter press cloths. By understanding the unique challenges presented in various industries, we can offer high quality solutions that are specifically designed to optimize operational efficiency for their application.

Our Solution - PPD 3134:

  • Clear Filtrates
  • Excellent Cake Release
  • Easy Installation
  • Tailor-Made Production
  • High Flow Rates
  • Dry and Clean Filter Cakes
  • Good Cleanability
5. Markert Customized Solutions

5. Markert Customized Solutions


Development process for a custom engineered filter fabric
 

Labratory Testing

Markert runs a laboratory analysis of the filter cloth with subsequent analysis of the results.
This includes determination of:

  • Filtration test and fabric screening with our pressure nutsche
  • Electric resistance through and along the fabric
  • Air permeability
  • Water permeability
  • Pore size through microscope
  • Weight
  • Binding type
  • Fabric material
  • Thickness
  • Yarn type
  • Abrasion behavior
  • Chemical resistance
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