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介绍以芒硝、石膏、硫酸铵、硫酸镁为原料，通过复分解制取硫酸钾的方法以及各种方法的优缺点。
The methods of preparing potassium sulfate by metathesis, gypsum, ammonium sulfate, magnesium sulfate as raw materials and the advantages and disadvantages of various methods are introduced.