Anthracite is a kind of filter used in water treatment. It is suitable for the treatment of common acid, the middle degree alkali. This product has large surface area, and its various indexes all exceed the Construction Department’s standard. Anthracite filter is especially selected from the deep well minerals, so it includes the highest percentage of carbo. It must have been filtered and washed to make sure it can be used for water filting. Since it has better granular maintaining ability, so it can improve the floating granular’s cleaning ability. nalysis index Analysis index Analysis index specific gravity 1.57 >1.8g/cm3 subsistance ≤3% S 0.05% volume weight 0.947t/m3 HCL'S solubility 0.98% Pb 0.045% Wear rate ≤0.68% Zn 0.04% mud ≤0.52 poriness 51.99% ashes ≤1.0% Cu 0.025% asymetrical ratio K80less ≤1.5 density 1.57g/cm3 K60 ≤2.0 burnt value 6800Kee/kg solid content ≤1% other heavy mental's content not exceed to national drinking water standard C's ≤90