Process Route Overview The Iron Oxide Red Method (hereinafter referred to as the "Iron Red Method"), also known as the carbothermal reduction iron red method, is a process route that uses ferric oxide (Fe₂O₃) as the iron source, composite salts such as lithium dihydrogen phosphate (LiH₂PO₄) as the lithium and phosphorus sources, and organic carbon sources like glucose as both the reducing agent and conductive coating agent. Through a high-temperature solid-state carbothermal