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1.发明授权公开(公告)号：US06390810B1
公开(公告)日：2002-05-21
申请号：US09763537
申请日：2001-02-21
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。
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公开(公告)号：US06270551B1
公开(公告)日：2001-08-07
申请号：US09122972
申请日：1998-07-27
IPC分类号： C21B1308
CPC分类号： C22B1/245 , C21B13/0046 , C21B13/08 , C21B13/10 , C21B13/105 , C22B1/24 , Y02P10/136
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. Blending with the mixture an organic binder. The mixture is then 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 5-12 minutes at a temperature of between about 2200-2500° 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。 与混合物混合有机粘合剂。 然后将混合物团聚以形成生坯。 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2200-2500°F的温度下加热约5-12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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公开(公告)号：US6152729A
公开(公告)日：2000-11-28
申请号：US358161
申请日：1999-07-20
CPC分类号： C21B13/105 , F27B9/16 , F27B9/39 , F27D3/08 , F27D9/00 , F27B2009/386 , F27D2009/0016 , F27D2009/0021 , Y02P10/136
摘要： A discharge assembly for removing material from a hearth in a rotary hearth furnace including a discharge auger and a coolant spray. The discharge auger is positioned above the hearth of the rotary hearth furnace and includes a central shaft having at least one helical flight affixed to the exterior of the central shaft and the hood is disposed above the discharge auger. The coolant spray cools the discharge auger.
摘要翻译： 一种用于从包括排出螺旋推运器和冷却剂喷射的旋转炉床炉中的炉床中去除材料的排出组件。 排放螺旋推运器位于转底炉的炉床上方，并且包括具有固定在中心轴的外部的至少一个螺旋形飞行的中心轴，并且该罩设置在排放螺旋推运器的上方。 冷却剂喷雾冷却排放螺旋钻。
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公开(公告)号：US5601692A
公开(公告)日：1997-02-11
申请号：US565851
申请日：1995-12-01
摘要： A continuous process for treating a noncaking coal to form stable char. The process includes the sequential steps of drying the coal to remove moisture therefrom and form a dry coal; pyrolyzing the dry coal by progressively heating substantially all of the coal to a temperature sufficient to vaporize and remove low end volatile materials from the coal to form char and sufficient to mobilize at least a portion of high end volatile materials within the char and at least partially collapse micropores within the char. The char is then cooled to a temperature sufficient to demobilize the volatile materials within the at least partially collapsed micropores of the char to pyrolytically passivate the char. The char is then conveyed to a reaction vessel wherein a process gas having about 3%-21% by volume oxygen flows through the reaction vessel to oxidatively passivate the coal by chemisorption of oxygen. The oxidatively passivated char is then substantially simultaneously rehydrated and cooled to form a char having about 5-10 wt % moisture and then conveyed to a final passivation vessel wherein a process gas having about 3%-21% by volume oxygen flows through the vessel to finally passivate the rehydrated char by chemisorption of oxygen.
摘要翻译： 一种用于处理不凝煤以形成稳定炭的连续方法。 该方法包括干燥煤以从其中除去水分并形成干燥煤的顺序步骤; 通过将基本上所有的煤逐渐加热到足以蒸发并从煤中除去低端挥发性物质以形成炭并足以在焦炭中至少部分地移动至少一部分高端挥发性物质的温度来热解干煤， 在焦炭内折叠微孔。 然后将炭冷却至足以使焦炭的至少部分收缩的微孔内的挥发性物质复活以使焦炭热解钝化的温度。 然后将炭输送到反应容器，其中具有约3体积％〜21体积％氧气的工艺气体流过反应容器，以通过化学吸附氧气来对煤进行氧化钝化。 然后将氧化钝化的炭基本上同时再水合并冷却以形成具有约5-10重量％水分的焦炭，然后输送至最终钝化容器，其中具有约3体积％-21体积％的氧气的工艺气体流过容器至 最后通过化学吸附氧来钝化再水化的炭。
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公开(公告)号：US5865875A
公开(公告)日：1999-02-02
申请号：US797108
申请日：1997-02-10
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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公开(公告)号：US5601631A
公开(公告)日：1997-02-11
申请号：US519844
申请日：1995-08-25
申请人： Franklin G. Rinker , Deane A. Horne
发明人： Franklin G. Rinker , Deane A. Horne
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 combining the iron-bearing materials, having metal oxides including iron oxides therein, with carbonaceous material to form a dry mixture. The dry mixture is agglomerated under conditions sufficient to mobilize volatile matter from the carbonaceous material to function as a binder and bond the dry mixture and 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 2150.degree. F. to 2350.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。 该方法包括将含有其中的氧化铁的金属氧化物的含铁材料与含碳材料组合以形成干混合物的步骤。 干燥混合物在足以从碳质材料中挥发挥发物质的条件下附聚，起粘合剂的作用，并将干燥混合物结合并形成生坯。 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2150°C至2350°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旋转炉床炉中排出，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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公开(公告)号：US06395060B1
公开(公告)日：2002-05-28
申请号：US09597923
申请日：2000-06-19
申请人： Deane A. Horne , Franklin G. Rinker
发明人： Deane A. Horne , Franklin G. Rinker
IPC分类号： C22B702
CPC分类号： C22B5/10 , C22B7/02 , C22B19/28 , Y02P10/212 , Y10S75/961
摘要： A method of processing flue dust, where the flue dust contains one or more compounds from a first group of zinc, lead and cadmium compounds, and contains one or more compounds from a second group of iron, silicon, calcium, magnesium and aluminum compounds, includes mixing the flue dust with a carbonaceous material, heating the flue dust/carbonaceous material mixture under non-turbulent conditions to cause a substantial portion of the compounds from the first group to become gas-borne while retaining a substantial portion of the compounds of the second group in a non-gas-borne condition, and separating the gas-borne compounds from the non-gas-borne compounds.
摘要翻译： 一种处理烟道灰尘的方法，其中烟道灰含有来自第一组锌，铅和镉化合物的一种或多种化合物，并且含有来自第二组铁，硅，钙，镁和铝化合物的一种或多种化合物， 包括将烟道粉尘与碳质材料混合，在非湍流条件下加热烟道尘埃/碳质材料混合物，使大部分化合物从第一组变成气相，同时保留大部分化合物的 在非气体条件下的第二组，并且将气相化合物与非气体传递的化合物分离。
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公开(公告)号：US5873925A
公开(公告)日：1999-02-23
申请号：US797117
申请日：1997-02-10
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。
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公开(公告)号：US5782957A
公开(公告)日：1998-07-21
申请号：US746203
申请日：1996-11-06
申请人： Franklin G. Rinker , Deane A. Horne
发明人： Franklin G. Rinker , Deane A. Horne
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 treating iron-bearing material with a carbonaceous material to form a dry 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 dry mixture. The dry mixture is agglomerated to bond the dry 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. 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.
摘要翻译： 用含碳材料处理含铁材料以形成干混合物的方法，其中加入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干混合物混合。 干燥的混合物凝聚以粘合干燥混合物并形成生坯。 将生坯压块加载到加热炉中并在约2100°-2500°F的温度下加热约5-12分钟，将含铁氧化物的成型体还原成含有元素铁和过量碳质材料的压块，其中 过量的碳质材料抵抗元素铁的再氧化。 然后将还原的压块从炉中排出。
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公开(公告)号：US4805881A
公开(公告)日：1989-02-21
申请号：US055426
申请日：1987-05-28
CPC分类号： C21D1/763 , B01J8/04 , B01J2208/00061 , B01J2208/00132 , B01J2208/00212 , B01J2208/00389 , B01J2208/00495 , B01J2208/00504 , B01J2208/00522 , B01J2208/0053 , B01J2208/00548
摘要： An internal gas generator in combination with a standard heat treat furnace is provided for producing either an endothermic product gas or a purge gas. The generator includes a reaction tube containing alternating packed beds of a highly active catalyst and inert heat transfer particulates. The reaction tube is surrounded by an elongated tubular heating element which heats the reaction tube, the combination producing an acceptable product gas in a small arrangement suitable for retrofit applications to existing furnaces. A flanged mounting permits the reaction tube to be easily removed for standard replacement in the event of catalyst poisoning and the like.
摘要翻译： 提供与标准热处理炉组合的内部气体发生器用于产生吸热产物气体或吹扫气体。 该发生器包括含有高活性催化剂和惰性传热颗粒的交替填充床的反应管。 反应管由加热反应管的细长管状加热元件围绕，该组合以适合于对现有炉的改造应用的小布置产生可接受的产物气体。 法兰安装允许在催化剂中毒等情况下容易地去除反应管以进行标准更换。
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