萃余酸脱镁渣制备过磷酸钙工艺研究

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中图分类号：TQ126.35 文献标识码：A 文章编号：1004-8901（2025）04-0046-04

Studyon the Preparation Processof Calcium Superphosphate from MagnesiumRemovalSlagofRaffinateAcid

SHI Tong-shan，WANG Shi-han  ，LIU Xu，XIE Bo，ZHANGLiang，JIANGXiao-lin  （1.StateKeyLaboratoryofEfficient UtilizationofMediumandLow GradePhosphateOreandAssociatedResources， Guiyang Guizhou 550016，China;2.Wengfu（Group）Co.，Ltd.，Guiyang Guizhou 55000o，China； 3.Guizhou UniuersityofScience and Technology，GuiyangGuizhou 55oooo，China）

AbstractThisstudyivestigatsteprossofproucingmsuperposptefroMagnesmoallagofaateacidfocsingon theefectsofdiferentratiosofMagnesumremoalslagtoospateconcentrateandposphateoreoncalcumsuperpospateproductionTe resultsshowthatMagnesiumremovallgandsulfuricacidcouldbemixedinanyratiotoprepareamixedacidWhentheacid-tooremasstio is 1：2 ，and phosphoric concentrate ⋅P2O5 content of 32% ，sieved to 200mesh ）isaddedand mixed forO.5hours，followedbyagingforthree weeks，calciusuperpospateproductsmetigtfistassprouctstadardsofGB/4-canegeneatedTsroesispe in operation and easy to industrialize.

Keywords：raffinate acid；sulfuric acid method；Magnesium removal slag；calcium superphosphate doi： 10，3969/j .issn.1004-8901.2025.04.014

过磷酸钙是最早的化肥品种之一[]，是用硫酸分解磷矿直接制得的一种低浓度磷肥，含 12%～ 18% 的 P2O5 ，主要组分为磷酸二氢钙的水合（Ca（H2PO4）2⋅H2O） 、无水硫酸钙和少量游离的磷酸2。（剩余3692字）