Manganese sand filter is made of high quality manganese ore as raw material block, made by crushing screening, the appearance of rough, brown, has a good performance of iron and manganese removal, commonly used in drinking water in addition to iron and manganese filter. 
 China's production of manganese sand filter is mainly used for iron and manganese removal water filter, the manganese-based form of the manganese oxide is manganese processing of natural selection, screening is made, the appearance of brown, spherical, high mechanical strength, chemical stability, long service life, in the treatment without adding any pharmaceutical use of the treated water met the national drinking water quality standards, the company building the implementation of standards for the People's Republic of urban water treatment industry standards using natural manganese sand filter CJ/T3041-1995. 
 Natural manganese sand is a strong oxidant, can share the water from the oxidation of iron. Sand on the use of natural iron manganese dioxide, the principle there are two kinds: one is the role of the so-called active filters, manganese sand surface layer of strong oxidation. The other is antiferromagnetic manganese sand itself is a catalyst. The water into three of ferrous iron catalyst, and then ferric kHz sand particles attached to the surface of manganese to iron play purpose. Natural manganese dioxide can be oxidized in the water divalent ferric iron to precipitate removed, the water clean, manganese dioxide oxidation of dissolved oxygen in the water, seven-valent manganese oxide. Seven of manganese in water and then oxidized to divalent ferric iron.