Inorganic Chemicals Industry >
Preparation of battery-grade iron phosphate by jet-enhanced air oxidation method
Received date: 2024-05-09
Online published: 2024-06-11
The preparation of battery-grade iron phosphate using air as oxidizing agent has the problems of large particle size and low efficiency with traditional mechanical stirring reactor and bubbling reactor.In this study，it was proposed to prepare battery-grade iron phosphate by using jet-enhanced air oxidation，using a self-developed jet oxidation reactor as the experimental setup，and air as the oxidizing agent for the oxidative precipitation of ferrous dihydrogen phosphate solution.It was found that the jet-enhanced air oxidation method could preferably prepare battery-grade iron phosphate.In addition，the effects of reaction temperature，reaction time，reactant flow rate，air flow rate and pH on the particle size and yield of the product during the preparation of iron phosphate were investigated by the method of orthogonal test.The synthesized products were characterized and analyzed by X-ray diffraction，laser particle size analyzer and scanning electron microscopy.The results showed that the optimum process conditions were reaction temperature of 90 °C，reaction time of 100 min，ferrous dihydrogen phosphate solution flow rate of 10 L/min，air flow rate of 3.5 L/min，and pH of 2.0.Under these conditions，the prepared ferrous phosphoric acid was a spherical-like particle，with a high degree of crystallinity，a narrow particle size distribution，and the D50 was 5.37 μm，the yield was 93.28%.
YU Hesong , WANG Dexi , YU Honglei , ZUO Maosheng , LI Jiazhi . Preparation of battery-grade iron phosphate by jet-enhanced air oxidation method[J]. Inorganic Chemicals Industry, 2025 , 57(4) : 31 -36 . DOI: 10.19964/j.issn.1006-4990.2024-0259
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