METHOD FOR PREPARING LITHIUM IRON PHOSPHATE PRECURSOR FROM HIGH-IRON RED MUD

Provided in the present disclosure is a method for preparing a lithium iron phosphate precursor from high-iron red mud. The method comprises: mixing high-iron red mud with an acid liquor, and then leaching the mixture to obtain a red mud leachate; mixing the red mud leachate with a phosphate, and then subjecting the mixture to a first homogeneous reaction to obtain a primary homogeneous solution; adjusting the pH value and iron-phosphorus ratio of the primary homogeneous solution, and then subjecting the primary homogeneous solution to a second homogeneous reaction to obtain a secondary homogeneous solution; and precipitating the secondary homogeneous solution to obtain a lithium iron phosphate precursor. La présente divulgation propose un procédé de préparation d'un précurseur de phosphate de fer et de lithium à partir de boue rouge à haute teneur en fer. Le procédé comprend : le mélange de boue rouge à haute teneur en fer avec une liqueur acide, puis la lixiviation du mélange pour obtenir un lixiviat de bou