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在磷铵生产中要排出大量的磷石膏废渣，不仅要占用大量土地堆放且污染环境。笔者介绍了以磷石膏废渣作原料生产硫酸钾铵的３０００ｔ／ａ中间试验装置，包括磷石膏与碳酸铵复分解反应制备硫铵及硫铵与氯化钾复分解反应制取硫酸钾铵
In the production of ammonium phosphate to discharge a large amount of phosphogypsum waste, not only to take up a lot of land and pollute the environment. The author introduced the use of phosphogypsum waste raw materials for the production of potassium ammonium sulfate 3000t / a pilot plant, including phosphogypsum and ammonium carbonate metathesis reaction of ammonium sulfate and ammonium sulfate and potassium chloride metathesis reaction of potassium ammonium sulfate