This industrial process data set refers to the production of hot metal or molten iron using a blast furnace. The input materials for the ironmaking process include sinter, pellets, lump ore, and scrap. The output of the process, hot metal, is primarily used in steelmaking operations to manufacture a variety of steel products. When utilizing this data set for Life Cycle Assessment, attention should be paid to the specific ironmaking technology used, as it affects emissions and energy use. It should be ensured that the data match the technological generation of the assessed blast furnace. Recycling of scrap steel in the blast furnace should also be accurately accounted for, as it influences the environmental impacts of iron production. If the data is applied to model the use phase of steel products, behavior specific to the steel grade and product application must be taken into account.