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公开(公告)号：EP1660688B1
公开(公告)日：2007-01-03
申请号：EP04740520.4
申请日：2004-07-01
IPC分类号： C21C5/52
CPC分类号： C21C5/527 , Y02P10/216
摘要： In a method of charging fine-grained metals, in particular directly reduced iron (DRI), into an electric-arc furnace (1), the metal is supplied via a downpipe (12) to an opening (10) provided in the furnace roof (4), is introduced into the furnace (1) through this opening (10) as bulk material stream (11), and falls onto the melt (13) merely by grav ity. Further, an electric-arc furnace (1) suited for this purpose is described. A rather loss-free introduction even of fine-grained material having a mean grain size of less than 1 mm is achieved by passing the bulk material stream (11) through a dosing orifice (8) after the downpipe (12) and before entering the furnace (1). The bulk material stream (11 ) then enters the furnace essentially undisturbed.
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公开(公告)号：EP1756324A1
公开(公告)日：2007-02-28
申请号：EP05746507.2
申请日：2005-05-20
CPC分类号： C21B13/002 , C21B13/0033 , C21B2100/282 , C21B2100/44 , C21B2100/64 , C21B2100/66 , C22B5/14 , Y02P10/122 , Y02P10/126 , Y02P10/136
摘要： A direct reduction process for a metalliferous material comprises supplying the metalliferous material, a solid carbonaceous material, an oxygen-containing gas, and a fluidising gas into a fluidised bed in a vessel and maintaining the fluidised bed in the vessel, at least partially reducing metalliferous material in the vessel, and discharging a product stream that comprises the at least partially reduced metalliferous material from the vessel. The process is characterised by: (a) reducing the metalliferous material in a solid state in a metal-rich zone in the vessel; (b) injecting the oxygen-containing gas into a carbon-rich zone in the vessel with a downward flow in a range of plus or minus 40 degrees to the vertical and generating heat by reactions between oxygen and the metalliferous material (including metallised material), the solid carbonaceous material and other oxidisable solids and gases in the fluidised bed, and (c) transferring heat from the carbon-rich zone to the metal-rich zone by movement of solids within the vessel. The metal-rich zone is formed in a lower section of the vessel and the carbon-rich zone is an intermediate section below an upper section of the vessel. Oxygen-containing gas is injected into a central region of the vessel.
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公开(公告)号：EP1766099A2
公开(公告)日：2007-03-28
申请号：EP05741974.9
申请日：2005-05-20
IPC分类号： C21B13/00
CPC分类号： C21B13/0033 , C21B13/146 , F27B15/10 , Y02P10/122 , Y02P10/126 , Y02P10/136
摘要： An apparatus for reducing a metalliferous material in a fluidised bed comprises a vessel for containing the fluidised bed, a means for supplying the metalliferous material, a solid carbonaceous material, an oxygen-containing gas, and a fluidising gas into the vessel for forming the fluidised bed in the vessel. The oxygen-containing gas supply means comprises one or more than one oxygen-containing gas injection lance having a lance tip with an outlet that is positioned for injecting the oxygen-containing gas in a downward flow into the vessel within a range of plus or minus 40 degrees to the vertical.
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公开(公告)号：EP1756322A2
公开(公告)日：2007-02-28
申请号：EP05754200.3
申请日：2005-05-20
IPC分类号： C21B13/00
CPC分类号： C21B13/0033 , C22B5/10 , C22B5/14 , Y02P10/122 , Y02P10/126 , Y02P10/136 , Y02P10/216
摘要： A direct reduction process for a solid metalliferous material having a particle size distribution that at least in part comprises micron sized particles, comprises supplying the metalliferous material, a solid carbonaceous material, an oxygen-containing gas, and a fluidizing gas into a fluidized bed in a vessel and maintaining the fluidized bed in the vessel, at least partially reducing metalliferous material in the vessel, and discharging a product stream that comprises the at least partially reduced metalliferous material from the vessel. The process is characterized by: (a) establishing and maintaining a carbon-rich zone within the fluidized bed; (b) passing metalliferous material, including metallised material (which term includes partially metallised material), through the carbon-rich zone; and (c) injecting the oxygen-containing gas into the carbon-rich zone and oxidizing metallised material, solid carbonaceous material and other oxidisable solids and gases and causing controlled agglomeration of particles.
摘要翻译： 对于具有的粒度分布使得至少部分地包括微米大小的颗粒的固体含金属材料，包括提供含金属材料，固体含碳材料，含氧气体和流化气体进入流化床中的直接还原过程 容器中并保持容器中的流化床，至少部分地还原容器中的含金属材料，以及从容器排出包含至少部分还原的含金属材料的产物流。 该方法的特征在于：（a）在流化床内建立并保持富含碳的区域; （b）使含金属材料（包括金属化材料（该术语包括部分金属化材料））通过富碳区; （c）将含氧气体注入富含碳的区域并氧化金属化材料，固体碳质材料和其它可氧化固体和气体，并引起颗粒的受控聚集。
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公开(公告)号：EP1753883A1
公开(公告)日：2007-02-21
申请号：EP05752214.6
申请日：2005-05-20
CPC分类号： C21B13/0033 , C21B13/14 , C22B5/14 , Y02P10/122 , Y02P10/126 , Y02P10/128 , Y02P10/136
摘要： A direct reduction process for a metalliferous material comprises: supplying a solid carbonaceous material and an oxygen-containing gas into a fluidised bed in a first vessel (3) and generating heat by reactions between the oxygen-containing gas and the solid carbonaceous material and any other oxidisable solids and gases in the fluidised bed and discharging a hot off-gas stream containing entrained solids; and supplying the metalliferous material to a fluidised bed in a second vessel and supplying the hot off-gas stream containing entrained solids from the first vessel to the fluidised bed in the second vessel and at least partially reducing the metalliferous feed material in the solid state in the fluidized bed and discharging a product stream of at least partially reduced metalliferous material and an off-gas stream containing entrained solids.
摘要翻译： 用于含金属材料的直接还原方法包括：将固体含碳材料和含氧气体供入第一容器（3）中的流化床中并通过含氧气体和固体含碳材料之间的反应产生热量，以及 其他可氧化固体和气体在流化床中并排出含有夹带固体的热废气流; 以及将含金属材料供应至第二容器中的流化床并将含有夹带固体的热废气流从第一容器供应至第二容器中的流化床并且至少部分地还原处于固态的含金属原料 流化床并排出至少部分还原的含金属材料的产物流和含有夹带固体的尾气流。
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公开(公告)号：EP1660688A1
公开(公告)日：2006-05-31
申请号：EP04740520.4
申请日：2004-07-01
IPC分类号： C21C5/52
CPC分类号： C21C5/527 , Y02P10/216
摘要： In a method of charging fine-grained metals, in particular directly reduced iron (DRI), into an electric-arc furnace (1), the metal is supplied via a downpipe (12) to an opening (10) provided in the furnace roof (4), is introduced into the furnace (1) through this opening (10) as bulk material stream (11), and falls onto the melt (13) merely by grav ity. Further, an electric-arc furnace (1) suited for this purpose is described. A rather loss-free introduction even of fine-grained material having a mean grain size of less than 1 mm is achieved by passing the bulk material stream (11) through a dosing orifice (8) after the downpipe (12) and before entering the furnace (1). The bulk material stream (11 ) then enters the furnace essentially undisturbed.
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