This study uses phosphogypsum without impurity removal, sodium carbonate and hydrochloric acid to produce special calcium carbonate of high purity over 99%, and the whiteness reaches up to 95%.

• 摘要利用未经除杂的磷石膏、碳酸钠以及盐酸在一定条件下制备纯度高达99%25以上，白度达95%25的特殊碳酸钙。