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Short-Process and Clean Preparation Technique for Battery-Grade Iron Phosphate
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Zhenyong MEI1, 2, Li YANG1, Qiang GUO2, Yongli LI2, Weiyong CUI2
Mining and Metallurgical Engineering | 2025, 45(4) : 147 - 152
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Mining and Metallurgical Engineering | 2025, 45(4): 147-152
• METALLURGY •
Short-Process and Clean Preparation Technique for Battery-Grade Iron Phosphate
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Zhenyong MEI1, 2, Li YANG1, Qiang GUO2, Yongli LI2, Weiyong CUI2
Affiliations
  • 1.School of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China
  • 2.National Engineering Research Center for Green Recycling of Strategic Metal Resources, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
Published: 2025-08-01 doi: 10.3969/j.issn.0253-6099.2025.04.027
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A new short-process preparation technique for battery-grade iron phosphate was explored with iron powder and phosphoric acid as main raw materials. The effects of iron powder dissolution mechanism, iron phosphate reaction conditions, and mother liquor recycle on product indicators were investigated. The results show that the dissolution rate of iron powder can reach 97.92% at a temperature of 70 ℃, with phosphoric acid at a concentration of 20%, iron and phosphorus at a ratio of 1/3, and iron powder at a size of 150 μm；after 1 h precipitation at 100 ℃, with an addition of hydrogen peroxide at 110% of the theoretical amount, an iron phosphate with D50 of 2 μm was prepared with the precipitation rate of 98.86%. The obtained iron phosphate has stable crystal form with uniform crystal grains, and the contents of elemental impurities are significantly lower than the requirements specified in the HG/T 4701—2021 standard. The precipitated mother liquor in the process can be recycled, leading to actualization of low-carbon and green production.

iron powder  /  iron phosphate  /  battery-grade  /  iron-phosphorus ratio  /  mother liquor recycle  /  short-process
Zhenyong MEI, Li YANG, Qiang GUO, Yongli LI, Weiyong CUI. Short-Process and Clean Preparation Technique for Battery-Grade Iron Phosphate[J]. Mining and Metallurgical Engineering, 2025 , 45 (4) : 147 -152 . DOI: 10.3969/j.issn.0253-6099.2025.04.027
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doi: 10.3969/j.issn.0253-6099.2025.04.027
  • Receive Date：2025-02-17
  • Online Date：2026-03-05
  • Published：2025-08-01
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  • Received：2025-02-17
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Affiliations
    1.School of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China
    2.National Engineering Research Center for Green Recycling of Strategic Metal Resources, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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