Phosphoric Acid Leaching of Ni–Co–Fe Powder Derived from Limonitic Laterite Ore
摘要
Efficient extraction of nickel and cobaltCobalt from laterite oresLaterite ore is essential for the rapid development of new energy vehicles (EVs). In this work, Ni–Co–Fe powderNi-Co-Fe powder with nickel, cobaltCobalt, and iron grades of 11.98%, 1.18%, and 70.13%, respectively, was obtained from a limonitic lateriteLimonitic laterite ore via rotary kiln reductive roastingRoasting followed by magnetic separationMagnetic separation. The powdery alloy was readily dissolvable in the phosphoric acid solution at atmospheric pressure. From the leachingLeaching solution, amorphous FePO4 · xH2O was precipitated by adjusting pH, and the purified Ni–Co-rich solution could be used for Ni–Co sulfate.