有色金属科学与工程2026，Vol.17Issue(4)：569-580,12.DOI:10.13264/j.cnki.ysjskx.2026.04.009
锰铁合金制备磷酸锰铁溶液
Preparation of manganese iron phosphate solution from ferromanganese alloy
摘要
Abstract
For the resource utilization of ferromanganese alloy,a phosphoric acid leaching method was proposed to prepare the precursor solution(manganese-iron phosphate solution)for lithium battery cathode materials.Through single-factor and orthogonal experiments,the optimal conditions were determined as follows:an acid excess coefficient of 1.2,a liquid-to-solid ratio of 11∶1,a temperature of 70℃,and a time of 1 h.Under these conditions,the leaching rates of Mn and Fe reached 97.42%and 92.81%,respectively.The impurity content in the purified solution met industrial standards.Thermodynamic analysis confirmed the spontaneous reaction characteristics(ΔG<-40 kJ/mol),and the E-pH diagram of the Mn-Fe-H3PO4 system was constructed.It revealed the critical conditions for the stable existence of Mn2+at pH<2.20 and for the precipitation of Fe3+at pH>0.56.Kinetic studies indicated that the leaching process followed the unreacted core model,with activation energies of 44.47 kJ/mol for Mn and 48.08 kJ/mol for Fe,suggesting a chemical reaction-controlled mechanism.This work provided a new low-cost approach for the preparation of lithium manganese iron phosphate(LMFP).关键词
锰铁合金/磷酸浸出/热力学/动力学/正交实验/电池材料Key words
ferromanganese alloy/phosphoric acid leaching/thermodynamics/kinetics/orthogonal experiment/battery materials分类
矿业与冶金引用本文复制引用
周芳羽,王家伟,王海峰,周兴杰,田松,刘馨阳,叶婷婷,唐旭..锰铁合金制备磷酸锰铁溶液[J].有色金属科学与工程,2026,17(4):569-580,12.基金项目
贵州省基础研究资助项目([2025]重点095) （[2025]重点095）
贵州省中央引导地方科技发展资金资助项目([2025]026) （[2025]026）
铜仁市科技重大专项资助项目(铜市科研[2024]93) （铜市科研[2024]93）
贵州省科技支撑重点资助项目([2022]重点020) （[2022]重点020）
贵州省重大专项资助项目([2022]003) （[2022]003）
