Fundamentals of fast reduction of ultrafine iron ore at low temperature

Pei Zhao and Peimin Guo State Key Laboratory for Advanced Iron and Steel Processes and Materials, China Iron and Steel Research Institute Group, Beijing 100081, China

摘 要：Fundamentals on the fast reduction of ultrafine iron ore at low temperature, including characterization of ultrafine ore, deoxidation thermodynamics of stored-energy ultrafine ore, kinetics of iron ore deoxidation, and deoxidation mechanism, etc., and a new ironmaking process are presented in this article. Ultrafine ore concentrate with a high amount of stored energy can be produced by mechanical milling, and can be deoxidated fast below 700°C by either the coal-based or gas-based process. This novel process has some advantages over others: high productivity, low energy consumption, and environmental friendliness.

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