Abstract:Appling ferric aluminum slag produced in the recycling process of waste lithium batteries as main raw material and shale as auxiliary material to prepare sintered block of ferric aluminum slag. Effects of shale content, sintering holding time and sintering temperature on volume density, water absorption and compressive strength of sintered block were systematically studied, and the optimal sintering conditions were obtained as follows: mass fraction of shale is 30%, molding pressure is 25 MPa, heating rate is 3℃/min, sintering temperature is 950 ℃, and holding time is 1.0 h. Under these conditions, volume density of sintered block sample is 1.68 g/cm3, water absorption is 18.13%, and compressive strength is 21.81 MPa. XRD and SEM results show that the generated eutectic fills the gap and improves the compactness and strength. The toxic leaching results of product meet the leaching requirements specified in GB 5085.3—2007 Hazardous Waste Identification Standard: Leaching Toxicity. There is no risk of heavy metal pollution in the use process.