Metal extract with a purity of 260# serves as an extraction diluent, utilized in tandem with the extraction agent. In the manufacturing processes involving cobalt, nickel, vanadium, indium, tungsten, copper, molybdenum, and similar metals, the extractant can be maximally diluted. It exhibits rapid phase separation and minimal losses compared to conventional solvent oils, boasting a high flash point and excellent safety profile. Its primary applications are in wastewater treatment, metal mining, and extraction and smelting operations.