1. Natural Mineral Method
The natural mineral method extracts magnesium sulfate from minerals containing magnesium sulfate. Common magnesium sulfate-containing minerals include magnesite and pyrite. These minerals are crushed, and an appropriate amount of water is added. After leaching, filtration, concentration, and crystallization, magnesium sulfate is obtained.
2. Sulfuric Acid Method
The sulfuric acid method produces magnesium sulfate by reacting sulfuric acid with magnesium oxide or magnesium hydroxide. First, magnesium oxide or magnesium hydroxide is added to water to form a slurry, and then sulfuric acid is added to react. After the reaction, the product is obtained through filtration, concentration, and crystallization.
3. Salt Lake Brine Method
The salt lake brine method utilizes the magnesium sulfate resources in salt lake brine to extract magnesium sulfate. Salt lake brine has a high magnesium sulfate content. After evaporation, concentration, and crystallization, magnesium sulfate is obtained.
