| 摘要 |
PROBLEM TO BE SOLVED: To enhance fertilizer effects of a raw material for fertilizers using steel slag as raw material.SOLUTION: A raw material for phosphate fertilizers contains CaO, SiO, POand iron oxide, based on Fe, in a total of 55 mass% or higher and includes 10 mass% or higher of a Ca(PO)phase in which 1-5 mass% of Si is solid-dissolved. |
