磷石膏是化工厂用磷矿石制磷酸后排放出的废渣。我国每年磷石膏的排放量达300万t。这些废渣一直未能很好利用,堆积如山,侵占良田,污染环境。磷石膏小型空心砌块的研制成功,不仅为磷石膏废渣的大量利用开辟了一条新路,而且,也将为墙体材料改革做出贡献。 Phosphogypsum is the waste residue discharged from phosphorous ore produced by chemical plants. China’s annual discharge of phosphogypsum reaches 3 million tons. These waste residues have not been well used, piled up like mountains, invaded farmland and polluted the environment. The successful development of small phosphogypsum hollow blocks not only opens up a new path for the extensive use of phosphogypsum waste residue, but also contributes to the reform of wall materials.