Anthracite filter material is made from high-quality raw coal through selection, crushing and two rounds of screening. It has a good luster, is spherical in shape, has high mechanical strength, good compressive performance and stable chemical properties. It is an excellent filtering material.
The working principle of anthracite filter material
Anthracite filter material is made from high-quality anthracite as raw material through processes such as selection, crushing, re-screening powder, and water washing. It is a commonly used double-layer or triple-layer rapid filtration material.
It is suitable for the purification treatment of general acidic, neutral and alkaline substances, and has a good specific surface area. All indicators meet the standards of the Ministry of Construction (CJ/T44-1999). Anthracite filter material is specially selected from deep well minerals and has the highest percentage of carbon content.
Anthracite filter material is manually classified, which can reduce irrelevant minerals and lower the ash content. It has also undergone filtration and rinsing to ensure its suitability for water filtration.
Due to its good solid particle retention capacity, anthracite can reliably enhance the removal ability of suspended particles. In addition, anthracite filter material has a relatively low uniformity coefficient, which helps to accelerate the flow rate of anthracite filter material.
Performance requirements for anthracite filter media
It should have high mechanical strength, and the sum of the breakage rate and wear rate should not exceed 3%.
It has stable chemical properties and contains no toxic substances. It is insoluble in general acidic, alkaline and neutral water. The products leaving the factory have been tested by the China Water Treatment Filter Material Supervision and Testing Center: the hydrochloric acid solubility rate is 0.68% (the ministry-issued standard is 3.5), and they can achieve good purification effects in various water sources.
The particle size gradation is reasonable and the specific surface area is large. The product has a spherical appearance with sharp edges and corners, and good gloss. After three mechanical vibration screenings, the gradation meets the relevant technical indicators. The uniformity coefficient (K60) is no more than 1.5 (Japanese standard), the non-uniformity coefficient (K80) is between 1.6 and 2.0, and the void ratio is greater than 50%.
For particle sizes smaller than the specified lower limit, the weight shall not exceed 5%; for those larger than the specified upper limit, the weight shall not exceed 5%.
https://www.naturecarbon.com/anthracite-filter-media/
