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1. 发明授权

US06390810B1 Method and apparatus for reducing a feed material in a rotary hearth furnace 失效
标题翻译：用于在转底炉中还原进料的方法和设备
公开(公告)号：US06390810B1
公开(公告)日：2002-05-21
申请号：US09763537
申请日：2001-02-21
申请人： Franklin G. Rinker , Deane A. Horne , James Alan Thornton
发明人： Franklin G. Rinker , Deane A. Horne , James Alan Thornton
IPC分类号： F27B1502
CPC分类号： F27B9/16 , F27D17/001 , F27D2009/0086 , F27D2099/0048
摘要： A rotary hearth furnace for reducing a feed material is disclosed. The rotary hearth furnace includes a rotating hearth disposed in an enclosure and mounted for rotary movement. The enclosure includes an annular inner wall, an annular outer wall and a roof. The enclosure is sealed to the hearth and divided into a plurality of zones including at least a loading zone, a process zone and a discharge zone. The furnace further includes a plurality of burners positioned in at least the outer wall of the enclosure to provide a controlled temperature within the rotary hearth furnace and a flue positioned within the reduction zone of the furnace between the preheat zone and the discharge zone to exhaust combustion gases from the burners and gases resulting from the processing of the feed material. Said flue contains space for combustion and settling of the unburned particulates. A water spray quench reduces the temperature of the furnace off-gas so that subsequent combustion by the introduction of air or oxygen does not produce significant nitrogen oxides.
摘要翻译：公开了一种用于还原原料的转底炉。转底炉包括设置在外壳中的旋转炉床，用于旋转运动。外壳包括环形内壁，环形外壁和屋顶。外壳被密封到炉膛上，并被分成至少包括装载区，处理区和排放区的多个区。炉子还包括多个燃烧器，其定位在外壳的至少外壁中，以提供旋转炉床炉内的受控温度和位于预热区域和排放区域之间的炉内还原区域内的烟道以排放燃烧来自燃烧器的气体和由进料的加工产生的气体。所述烟道含有用于燃烧和沉淀未燃烧颗粒的空间。喷水骤冷可降低炉尾气的温度，从而引入空气或氧气后的燃烧不会产生显着的氮氧化物。

2. 发明授权

US5873925A Process for treating iron bearing material 失效
标题翻译：铁轴承材料处理方法
公开(公告)号：US5873925A
公开(公告)日：1999-02-23
申请号：US797117
申请日：1997-02-10
申请人： Franklin G. Rinker , Deane A. Horne , James Alan Thornton
发明人： Franklin G. Rinker , Deane A. Horne , James Alan Thornton
IPC分类号： C21B13/00 , C21B13/08 , C21B13/10 , C22B1/24 , C22B1/245
CPC分类号： C22B1/245 , C21B13/0046 , C21B13/08 , C21B13/105 , C22B1/24 , Y02P10/136
摘要： A process for treating iron-bearing material with a carbonaceous material to form a mixture, wherein the amount of carbonaceous material added exceeds the stoichiometric amount required to reduce the metal oxide to elemental metal. In one embodiment, the process also includes blending an organic binder with the mixture. The mixture is agglomerated using compaction to bond the mixture and form green compacts. The green compacts are loaded into a heated furnace and heated for about 5-12 minutes at a temperature of between about 2100.degree.-2500.degree. F. and at a CO/CO.sub.2 ratio of about 1.5-2.5 proximate the discharge area to reduce the iron oxide containing compacts to compacts containing elemental iron and an excess amount of carbonaceous material wherein the excess amount of carbonaceous material counteracts re-oxidation of the elemental iron. The reduced compacts are then discharged from the furnace. The furnace includes counterflow and co-flow exhaust to maintain the charge area and the discharge area of the furnace at a pressure about equal to atmospheric pressure.
摘要翻译：用含碳材料处理含铁材料以形成混合物的方法，其中添加的碳质材料的量超过将金属氧化物还原成元素金属所需的化学计量量。在一个实施方案中，该方法还包括将有机粘合剂与该混合物混合。使用压实将混合物凝聚以粘合混合物并形成生坯。将生坯装入加热炉中，在约2100°-2500°F的温度下加热约5-12分钟，在排放区附近以约1.5-2.5的CO / CO 2比加热约5-12分钟，以减少铁含氧化物的成形体成型为含有元素铁和过量的含碳材料，其中过量的碳质材料抵消元素铁的再氧化。然后将还原的压块从炉中排出。该炉包括逆流和共流排气，以将炉的计量区域和排放面积维持在等于大气压的压力。

3. 发明授权

US5865875A Process for treating metal oxide fines 失效
标题翻译：处理金属氧化物细粉的方法
公开(公告)号：US5865875A
公开(公告)日：1999-02-02
申请号：US797108
申请日：1997-02-10
申请人： Franklin G. Rinker , Deane A. Horne , James Alan Thornton , Valdis R. Daiga
发明人： Franklin G. Rinker , Deane A. Horne , James Alan Thornton , Valdis R. Daiga
IPC分类号： C22B1/16 , C21B13/00 , C21B13/08 , C21B13/10 , C22B1/24 , C22B1/245
CPC分类号： C22B1/245 , C21B13/0046 , C21B13/08 , C21B13/10 , C21B13/105 , C22B1/24 , Y02P10/136 , Y10S75/961
摘要： A process for recovering iron from iron-bearing materials including steel mill waste and iron-bearing ores. The process includes the steps of providing a mixture of iron-bearing materials having iron oxides therein and carbonaceous material. The mixture is agglomerated to form green compacts. The green compacts are then loaded into a preheated rotary hearth furnace void of compacts to form a layer of compacts no more than about two compacts high. The green compacts are heated for about 5 to 12 minutes at a temperature of between about 2200.degree. F. to 2500.degree. F. to reduce the compacts and evolve undesirable oxides from the compacts. The reduced compacts are then discharged from the rotary hearth furnace whereupon they are soaked to provide additional time for reaction to achieve 99% or more reduction of the iron oxides. The metallized iron compacts may then be cooled or transported hot to a steel making operation.
摘要翻译：从含铁材料回收铁的方法，包括钢厂废铁和含铁矿石。该方法包括提供其中含铁氧化物的含铁材料和含碳材料的混合物的步骤。将混合物凝聚以形成生坯。然后，将压坯装入预热的旋转炉床炉中，其不具有压块，以形成不超过约两个压块的压实层。将生坯在约2200°F至2500°F的温度下加热约5至12分钟，以减小压块并从压块中产生不需要的氧化物。然后将还原的压块从转底炉中排出，然后将它们浸泡以提供额外的反应时间以实现99％或更多的氧化铁还原。然后可以将金属化的铁压块冷却或热输送至炼钢操作。

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