过磷酸钙又叫过磷酸石灰,简称普钙,生产工艺简单,价格便宜,适用范围广,肥效好。普钙在我国磷肥中占有重要地位,目前约占我国磷肥总生产量的70%,施用量占磷肥总施用量的70%以上。成分性质普钙是水溶性磷酸一钙称和40—50%的石膏的混合物,含水溶性五氧化二磷12—20%,另含2—4%的硫酸铁、硫酸铝,以及少量的磷酸三钙和游离酸。 Superphosphate, also known as over-phosphoric acid lime, referred to as calcium, production process is simple, cheap, wide range of applications, fertilizer and good. Calcium in China plays an important role in the phosphate fertilizer, accounting for about 70% of the total phosphate fertilizer production in China, the total amount of phosphate fertilizer application accounted for more than 70%. Component Properties: Calcium is a mixture of water-soluble monocalcium phosphate and 40-50% gypsum. It contains 12-20% water-soluble phosphorus pentoxide and 2-4% ferric sulfate, aluminum sulfate and a small amount of tris Calcium and free acid.