Pyrometallurgical recycling only requires simple disassembly and discharge of the waste LIBs and direct hightemperature smelting. Cobalt, nickel, copper, and other metal alloys are obtained by adding slag forming agent and reducing agent, while aluminum, lithium, and other metal elements enter the slag. This dataset is intended for life cycle assessment practitioners assessing the environmental impact of battery recycling processes. When using the data, ensure to consider the simplified disassembly and discharge stage of the waste lithium batteries prior to the high-temperature smelting process. Inclusion or exclusion of the energy and emissions associated with the smelting operation and the subsequent separation and refining of metals should be critically evaluated. It is also essential to account for the fate of metals like aluminum, lithium, and others that enter the slag, their potential environmental impacts, and any considerations for slag processing or disposal.