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3.4 Filtration Anthracite (Filtracite)
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Filtracite is manufactured from highly durable anthracite, which following extraction by mining is screened, washed and processed to produce a comprehensive range of water filtration products.
The physical and chemical inert nature of Filtracite makes it suitable for all potable, municipal and industrial processes where the removal of finely divided particulate material from aqueous suspension is required.
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Potable Water - Filtracite is used in combination with sand in rapid gravity filters for the treatment of both raw and coagulated, settled water. The benefits in this application are;
- Longer filter runs
- Increased filtration rate
- Improved filtration quality
- Lower residual aluminium levels
- Reduced backwash water and power consumption
Municipal Sewage Treatment - The tertiary treatment of sewage effluent to remove solids is necessary to meet discharge consents. Filtracite, used in isolation or as a dual media allows the use of higher filtration rates and reduced operating costs. Filtracite also exhibits a greater capacity for solids allowing extended operation between backwash intervals.
Industrial Water Purification - Effective removal of particulate matter from process streams in the chemical, petrochemical, textile,paper and pharmaceutical industries is achieved by the use of Filtracite in conjunction with other filtration medium such as sand and garnet. For process supply water, Filtracite provides an effective particulate removal medium in conjunction with other filtration medium or as support material for mechanical or adsorption filters.
CPL Carbon Link manufactures a range of Filtracite for water treatment.
The key features of these product are;
- Low bulk density
- Irregular shaped particles create a high void volume, high surface area and tortuous flow path
- High solids loading
- High permeability
- UK Drinking Water Inspectorate (DWI) approved
| Bulk density (kg m³) 740 Solubility (%w/w)* 1.5
Hardness (Moh scale) 3 Attrition loss (%)** 0.4
* in 10% HCl at 20°C and 10% NaOH at 20°C
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| Grade (mm) | Size (mm) | Effective Size (mm) | Uniformity Coefficient |
| 1 | 0.6 - 1.2 | 0.7 | <1.5 |
| 1s | 0.8 - 1.4 | 0.9 | <1.5 |
| 2 | 1.2 - 2.5 | 1.2 | <1.5 |
| 2s | 1.4 - 2.5 | 1.6 | <1.4 |
| 3 | 2.5 - 4.0 | 2.6 | <1.5 |
| 4 | 5.0 - 10.0 | Nominal within 85% of size range | |
| 5 | 20.0 - 40.0 | Nominal within 85% of size range | |
| 6 | 40.0 - 80.0 | Nominal within 85% of size range | |
| 7 | 0.6 - 1.2 | Nominal within 85% of size range | |
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