SD silicon-aluminum-calcium composite aluminum slag pellets can be used as special alloys to perform slag conditioning, deoxidation, and other functions during the steel (iron) melt process; this dataset includes primary raw and auxiliary materials, energy consumption, but excludes infrastructure such as production equipment and facility construction from its system boundary; the life cycle inventory is compiled from data sourced from multiple references; the production process of SD silicon-aluminum-calcium composite aluminum slag pellets includes mixing, forming, inspection, and packaging stages.