MANUFACTURING METHOD FOR ACTIVATED MINERAL SALT CONTAINING FERROUS-FERRIC SALTS

摘要

A method of producing activated mineral salt containing ferrous and ferric salts is provided to form the activated mineral salt which can replace organic mineral salts used in various processes such as drinking water treatment, water purification, waste water treatment and/or deodorization by using bittern and magnetite(Fe3O4) as byproducts of salt production using sea water or deep ocean water. The method includes the steps of: baking shells or animal bones at 850 to 1200deg.C; milling the shells or animal bones into powder having 300 to 400 mesh; dissolving the powder in 5 to 10wt.% hydrochloric acid solution to form a calcium solution; adding the calcium solution to bittern obtained as byproduct of a salt production process using sea water or deep ocean water so as to form a solution with Ca/Mg ratio by weight of 2 to 6; preparing a ferrous or ferric salt solution by dissolving magnetite powder containing 3 to 15wt.% of iron ingredient in terms of dry content in 5 to 10wt.% hydrochloric acid solution; adding the ferrous or ferric salt solution to the previously prepared solution having Ca/Mg ratio by weight of 2 to 6, thereby producing the activated mineral salt.