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公开(公告)号：EP4159879A1
公开(公告)日：2023-04-05
申请号：EP21814169.5
申请日：2021-05-14
摘要： This method for producing reduced iron is a method for producing reduced iron that produces reduced iron by reducing iron oxide charged in a shaft furnace, in which a heated gas mixture which contains a reducing gas and a nitrogen gas, the reducing gas containing 90 volume% or more of a hydrogen gas, is blown into the shaft furnace from a tuyere equipped at a lower portion of a reduction zone of the shaft furnace, at least part of the reducing gas is blown into a cooling zone of the reduced iron provided at a lower portion of the shaft furnace at normal temperature, and the reducing gas that has flowed up in the cooling zone is used for reduction of the iron oxide.
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公开(公告)号：EP3611278A1
公开(公告)日：2020-02-19
申请号：EP18784257.0
申请日：2018-04-13
发明人： FUNAGANE, Hitoshi , HAMAOGI, Kenji
IPC分类号： C22B9/22 , B22D11/00 , B22D11/041 , B22D21/06 , B22D27/02 , B22D43/00 , C22B34/12 , C22C14/00
摘要： A method for producing a metal ingot by using an electron-beam melting furnace including an electron gun capable of controlling a radiation position of an electron beam, and a hearth that accumulates a molten metal of a metal raw material, in which, in a downstream region between an upstream region in which the metal raw material is supplied onto the surface of the molten metal and a first side wall, an irradiation line is disposed so as to block a lip portion and so that two end portions are positioned in the vicinity of the side wall of the hearth. A first electron beam is radiated onto the surface of the molten metal along the irradiation line, and the first electron beam is radiated along the irradiation line. By this means, the surface temperature (T2) of the molten metal along the irradiation line is made higher than the average surface temperature (T0) of the entire surface of the molten metal in the hearth, and a molten metal flow from the irradiation line toward upstream that is a direction toward the opposite side to the first side wall is formed in an outer layer of the molten metal.
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