Patent
System and method for fluidized direct reduction of iron ore concentrate powder
朱庆山,Qingshan Zhu,范川林,Chuanlin Fan,李洪钟,Hongzhong Li,谢朝晖,Zhaohui Xie,牟文恒,Mou Wenheng,王存虎,Wang Cunhu,焦新刚,Jiao Xingang +13 more
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In this paper, a two-phase fluidized bed is used for the direct reduction of iron ore concentrate powder, which is formed by a bubbling bed and a circulating bed.Abstract:
A system and method for the fluidized direct reduction of iron ore concentrate powder. A two-phase fluidized bed is used for the direct reduction of iron ore concentrate powder. Each phase of the fluidized bed is formed by a bubbling bed and a circulating bed. Use of serial-connection processing involving gas and of high-gas-velocity processing of the circulating bed increase the gas utilization rate and the reduction efficiency of single-phase reduction. Once reduced gases are subjected to preheating, each gas is sent into an initial reduction phase and a final reduction phase so as to implement reduction of minerals. Use of mixed-connection processing involving gas appropriately reduces processing pressure. Hot flue gas produced by combustion in a gas heater is sent to a mineral pre-heating system that is used for pre-heating iron ore concentrate powder.read more
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