Pre-melted low basicity slag can be used in steelmaking refining furnaces to reduce the alkalinity of the refining slag and improve slag fluidity. The dataset includes major raw materials, auxiliary materials, and energy used in the production process, but infrastructure such as production equipment and factory construction is not included within the system boundary of the dataset. The life cycle inventory is compiled from data from multiple sources. The production activities of pre-melted low basicity slag include pre-mixing, shaping, screening, classification, and packaging processes.