This dataset represents a product that is electrolytic nickel, a high-purity end metal product obtained by purifying copper–nickel mixed concentrate and high-grade nickel matte via a full grinding–flotation–electrolysis process. Its core characteristics are distinctive: a silvery-white metallic appearance, excellent mechanical strength, ductility and high chemical stability, and resistance to corrosion and oxidation; it is a basic material and important strategic resource required for the national economy, the national defence industry and scientific and technological development. The upstream and downstream of its industrial chain are closely linked: the upstream core raw materials are copper–nickel mixed concentrate and high-grade nickel matte, and the grinding–flotation–electrolysis process consumes auxiliary materials such as flotation reagents, electrolysis auxiliary materials and acid solutions; the downstream application fields are extensive, with the core use in the steelmaking industry; at the same time, high-purity electrolytic nickel plays an irreplaceable key role in emerging low-carbon frontier technologies such as geothermal-energy development, electrolytic hydrogen storage and power batteries, and can be used to manufacture end products such as power-battery cathode materials and core components of high-end energy-storage equipment; it is the core end product of the nickel-industry value chain. The entire production process focuses on the grinding–flotation–electrolysis stage, with the full process covering the entire high-purity transformation process from the input of copper–nickel mixed concentrate and high-grade nickel matte to the output of the electrolytic-nickel product. The dataset includes the main raw and auxiliary materials, energy and wastes in the production process; infrastructure such as the manufacture of production equipment and plant construction is not included within the boundary of the dataset; the data inventory is formed by merging data from multiple sources.