BOUSSINGAULITE PRODUCTION PROCESS FROM LIQUID WASTE CONTAINING MAGNESIUM SULPHATE

摘要

boussingaultite production process from liquid effluents containing magnesium sulphate. A process for producing a double salt of hydrous magnesium ammonium sulfate or boussingaultite ((nh4) 2so4.mgso4.6h2o) is described using a magnesium sulfate-rich liquid effluent from hydrometallurgical processes of metal production such as nickel, copper, rare earths. According to the invention, the process route for the production of boussingaultite, with physical properties suitable for use in fertilizer mixtures, involves the steps of double boussingaultite salt precipitation, filtration and thermal drying.