This dataset is a market activity dataset, where each market represents a consumption mix of products within a specific region, connecting suppliers with consumers of the same product within that region. The market covers producers and importers of the product within the same geographical area. In addition, the market also takes into account the transport, freight of the product to the consumer, and losses during transportation.

Iron ore is the primary raw material for steelmaking, while steel is one of the core materials for modern industry and infrastructure construction. Hematite ore has a chemical composition of α-Fe2O3, which belongs to the hexagonal crystal system of oxide minerals. It forms a homologous polymorph with magnetite (γ-Fe2O3) of the isometric crystal system, with a Mohs hardness of 5.5 to 6.5. In Chinas iron ore resources, Hematite ore accounts for a considerable proportion and is characterized by its wide distribution, large reserves and low grade. Compared with magnetite ore, Hematite ore has a finer mineral dissemination size, higher clay content, and greater mineral processing difficulty.