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single superphosphate
释义
single superphosphate
Encyclopedia
工学
湿法磷肥
释
single superphosphate
过磷酸钙
用硫酸分解磷矿直接制得的磷肥。又称普通过磷酸钙,简称普钙。主要有用组分是磷酸二氢钙的水合物[Ca(H2PO4)2·H2O]和少量游离的磷酸,还含有无水硫酸钙组分(对缺硫土壤有用)。过磷酸钙含有效五氧化二磷为14%~20%(其中80%~95%溶于水),属于水溶性速效磷肥,灰色或灰白色粉料或颗粒料(由粉料造粒制成),可直接作磷肥,也可作制复合肥料的配料。
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stress corrosion cracking
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stress corrosion cracking test
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