... Compared with traditional sands and coal filter material, ceramic sand filters have great advantages as follows:1. Shaped in sphere, the ... of great amount of pollutant entrapment, up to 9-10 kg/m3, about 1.2 or 1.5 times ... H2SO4 solution for 14 days Alkali resistance,82.5Mixed in 10% NaOH+10% KOH solution for 14 days 4. Product Size(mm ... ,Φ1-2,Φ2-3,Φ5-6,Φ6-8,Φ8-10,Φ10-12,Φ13-16,Φ16-20,Φ20-30. Ceramic Sand ...