How to produce Magnesium Sulfate Heptahydrate via Sulfuric acid process?
Raw materials: Magnesium oxide or magnesium hydroxide or magnesium carbonate and sulfuric acid.
Reaction formula:
MgO+H2SO4+6H2O = MgSO4.7H2O
Make an example as Magnesium Oxide:
1. Measure the magnesium oxide ore and sulfuric acid proportionally.
2. Add some water in neutralizing tank, slowly adding magnesium oxide and Stiring it,after that adding sulfuric acid and keep PH=5,Density=1.370g/m³ - 1.384g/m³,Temperature=80℃.
3. Filter the mixture and put it in the crystallizer.
4. Cooled to 30℃ and subjected to centrifugal separation.
5. Put wet material into vibration fluidized bed.
6. Dry it and get Magnesium Sulfate Heptahydrate at 50℃-55℃
