Abstract: The fact that the metallurgical properties of natural lump ores were not insufficiently comprehensive and thorough grasped is obstructing the technology development of using lump ores in a modern blast furnace. Through analyzing and inspecting each metallurgical property of natural lump ores from main habitats in the world by experiment, the article indicates that the lump ores' metallurgical properties can meet a modern blast-furnace except the softening and melting properties. And the interaction between the sinter and the lump ores was found in the high temperature zone of the blast furnace, which can obviously improve the softening and melting properties of the lump ores. The blast burden structure also can be optimized by the interaction.