公开(公告)号：US09238253B2

公开(公告)日：2016-01-19

申请号：US13821169

申请日：2011-09-09

申请人： Gary M. Levanduski ,  Kyle Bartholomew ,  David W. Hendrickson ,  Christopher P. Manning ,  Anthony Ramjewan

发明人： Gary M. Levanduski ,  Kyle Bartholomew ,  David W. Hendrickson ,  Christopher P. Manning ,  Anthony Ramjewan

IPC分类号： B07B1/00 ,  C21B11/06 ,  C21B13/08

CPC分类号： B07B1/00 ,  C21B11/06 ,  C21B13/08 ,  Y02P10/136 ,  Y10T428/2982 ,  Y10T428/2991

摘要： A processed DRI material having an average surface roughness (Ra) of less than 1.5 μm is disclosed. A method and system for making processed DRI are also disclosed. One embodiment of the method and system may include assembling a rotatable chamber having an internal screen capable of supporting DRI during tumbling, with at least one opening in the chamber to permit fines to exit the chamber during tumbling, and delivering DRI into the chamber to tumble the DRI on the screen to remove fines from the DRI. Another embodiment of the method and system may include assembling a rotatable chamber having a feed end and an exit end, and having a screen therein capable of supporting DRI as the DRI moves through the chamber, and delivering DRI to the chamber and rotating the chamber to tumble the DRI while removing fines.

摘要翻译： 公开了平均表面粗糙度（Ra）小于1.5μm的经处理的DRI材料。 还公开了一种用于制造经处理的DRI的方法和系统。 该方法和系统的一个实施例可以包括组装具有能够在翻转过程中支撑DRI的内部屏幕的可旋转腔室，以及在室中的至少一个开口，以允许细小块在翻滚期间离开腔室，并将DRI输送到腔室中以翻滚 屏幕上的DRI从DRI中删除罚款。 方法和系统的另一实施例可以包括组装具有进料端和出口端的可旋转腔室，并且当DRI移动通过腔室时，其中具有能够支撑DRI的筛网，并将DRI输送到腔室并将腔室旋转至 翻滚DRI，同时取消罚款。

公开(公告)号：US20140000834A1

公开(公告)日：2014-01-02

申请号：US13925500

申请日：2013-06-24

申请人： Yieh United Steel Corp.

发明人： Wen-Chien Hsu ,  Pei-Te Huang ,  Yi-Cheng Wu ,  Cheng-Tung Yang

IPC分类号： C21B13/00

CPC分类号： C21B13/004 ,  C21B13/006 ,  C21B13/026 ,  C21B13/08 ,  C21C5/005 ,  C21C5/28 ,  C22B23/005 ,  C22B23/023 ,  C22B34/32 ,  C22C1/00 ,  C22C1/02 ,  C22C33/04 ,  C22C38/40

摘要： A method for manufacturing an austenitic stainless steel from a nickel laterite ore and a chromite ore includes the steps of determining a nickel content of the nickel laterite ore; processing the nickel laterite ore into a nickel-containing precursor based on the determination; obtaining a molten ferrochrome from the chromite ore; transferring the nickel-containing precursor into a converter, and hot charging the molten ferrochrome into the converter to obtain a molten stainless steel; and charging the molten stainless steel into a continuous casting machine to obtain a stainless steel slab.

摘要翻译： 从镍红土矿和铬铁矿生产奥氏体不锈钢的方法包括测定镍红土矿的镍含量的步骤; 根据测定，将镍红土矿石加工成含镍前体; 从铬铁矿中获得熔融的铬铁矿; 将含镍前体转移到转炉中，并将熔融铬铁热填充到转炉中，得到熔融不锈钢; 并将熔融不锈钢装入连续铸造机中以获得不锈钢板坯。

公开(公告)号：US20090260483A1

公开(公告)日：2009-10-22

申请号：US12375760

申请日：2007-07-31

申请人： Gerard Pretorius ,  Derek Roy Oldnall

发明人： Gerard Pretorius ,  Derek Roy Oldnall

IPC分类号： C21B13/08 ,  C21B13/00

CPC分类号： C21B13/14 ,  C21B13/004 ,  C21B13/08 ,  C21B13/12 ,  F27B7/00

摘要： A method for the production of iron from an iron oxide-containing material includes contacting an iron oxide-containing material with a particle size distribution range with a ∂90 of less than 2 mm, with a carbon-containing material with a particle size distribution range with a ∂90 of less than 6 mm, in a commercial scale reactor at a temperature of between 900° C. and 1200° C. for a contact time sufficient to reduce the iron oxide to iron.

摘要翻译： 一种从含氧化铁的材料生产铁的方法包括使含氧化铁的材料与∂90小于2mm的粒度分布范围与具有粒度分布范围的含碳材料接触 在900℃至1200℃之间的温度下，在商业规模的反应器中的∂90小于6mm的接触时间，足以将氧化铁还原成铁。

公开(公告)号：US20090249922A1

公开(公告)日：2009-10-08

申请号：US12012834

申请日：2008-04-02

申请人： Tadeusz Adrian Soyland

发明人： Tadeusz Adrian Soyland

IPC分类号： C21B15/00

CPC分类号： C21B13/0073 ,  C21B13/08 ,  C22B5/12 ,  Y02P10/136 ,  Y02P10/138

摘要： A manufacturing plant and process for producing steel from iron ore, at the iron ore mine, using a locally produced hydrogen as the reducing agent, where the hydrogen is produced through the electrolysis of water, using electricity generated by a wind power generator, thereby producing the cheapest possible reducing agent, on the mine site and producing steel with only oxygen and water vapor as the effluents from the process.

摘要翻译： 在铁矿石生产钢铁的制造工厂和工艺，使用局部生产的氢作为还原剂，利用风力发电机产生的电力通过电解水生产氢，由此生产 最便宜的还原剂，在矿场上生产钢，只有氧气和水蒸汽作为流出物。

公开(公告)号：US20080087135A1

公开(公告)日：2008-04-17

申请号：US11906761

申请日：2007-10-03

申请人： Jiann-Yang Hwang ,  Xiaodi Huang

发明人： Jiann-Yang Hwang ,  Xiaodi Huang

IPC分类号： C21C5/52 ,  C21B11/06 ,  C21C5/38

CPC分类号： C21C5/567 ,  C21B13/0046 ,  C21B13/08 ,  C21B13/105 ,  F27B1/10 ,  F27B7/34 ,  F27B9/16 ,  F27B9/36 ,  Y02P10/122 ,  Y02P10/136

摘要： A method and apparatus for reducing iron oxides using microwave heating in a furnace chamber which is sealed against the entrance of air reduces the energy required and produces a low temperature reduction and allows the recovery of combustible synthetic gas as a byproduct of the process. Avoidance of the reduction of sulfur, phorphorus and silica is also insured, as is the need to reduce the silica content of the feed material prior to reducing the ore. A continuous rotary hearth furnace, a rotary kiln, a linear conveyor and vertical shaft furnace chamber configurations are described. A secondary heating zone can also be included to process the reduced iron into iron nuggets or liquid metallic iron.

摘要翻译： 在与空气入口密封的炉室中使用微波加热还原铁氧化物的方法和装置减少了所需的能量并产生低温降低，并允许作为该方法的副产物回收可燃合成气体。 还保证避免硫，磷和二氧化硅的还原，以及在还原矿石之前需要减少进料的二氧化硅含量。 描述了连续旋转炉床，回转窑，直线输送机和垂直竖炉炉室结构。 还可以包括二次加热区以将还原铁加工成铁块或液态金属铁。

公开(公告)号：US06221127B1

公开(公告)日：2001-04-24

申请号：US09438079

申请日：1999-11-10

申请人： David W. Rierson

发明人： David W. Rierson

IPC分类号： C21B1308

CPC分类号： C21B13/08 ,  C22B1/216 ,  C22B1/2413

摘要： A method of pyroprocessing mineral ores, such as iron ore. The method includes receiving a preheated product stream of iron-containing pellets at an infeed end of a rotary kiln and introducing an oxidizing gas into the tumbling bed toward the infeed end of the rotary kiln. Additionally, a combustible fuel is introduced through ports above the tumbling bed such that combustion of the introduced fuel increases the temperature of the product stream toward the infeed end. The increase in the temperature of the product stream allows the intensity of the flame from the centerline burner to be decreased, resulting in a reduction in the production of NOx. The apparatus for introducing both the oxidizing gas and fuel into the rotary kiln are common with each other.

摘要翻译： 一种高效处理矿石的方法，如铁矿石。 该方法包括在旋转窑的进料端处接收含铁颗粒的预热产物流，并将氧化气体引入转向床朝向回转窑的进料端。 此外，可燃燃料通过转台上方的端口引入，使得引入的燃料的燃烧将产品流的温度提高到进料端。 产物流的温度升高允许来自中心线燃烧器的火焰的强度降低，导致NOx的产生减少。 将氧化气体和燃料两者都引入回转窑的装置是相互共同的。

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。

公开(公告)号：US5186741A

公开(公告)日：1993-02-16

申请号：US684622

申请日：1991-04-12

申请人： Norman L. Kotraba ,  Carl A. Holley

发明人： Norman L. Kotraba ,  Carl A. Holley

IPC分类号： C21B13/00 ,  C21B13/08 ,  C21B13/10 ,  C22B1/16 ,  C22B1/24 ,  C22B7/02 ,  C22B7/04

CPC分类号： C21B13/08 ,  C21B13/0046 ,  C21B13/105 ,  C22B1/24 ,  C22B7/02 ,  C22B7/04 ,  Y02P10/216 ,  Y10S75/961

摘要： The invented pellet reclamation process includes forming green pellets of a mixture of steel furnace dust, a carbonaceous material such as coal, charcoal, lignite, petroleum coke, or coke, and an organic binder. The green pellets are fed over a layer of burnt pellets on a rotary hearth furnace which successively conveys the pellets first through a drying and coking zone in which the pellets are dried and any volatile matter driven out of the carbonaceous material. The pellets then travel through a reduction zone where the pellets are subjected to a higher temperature at which the contained iron oxide is reduced and remains within the pellets and the zinc, lead and cadmium oxides are reduced, volatilized, re-oxidized and carried off as oxides in the waste gases. The reduced pellets (DRI) are ultimately carried into a discharge zone where they are discharged from the rotary hearth furnace. An apparatus for performing the process is also disclosed.

公开(公告)号：US4613364A

公开(公告)日：1986-09-23

申请号：US700656

申请日：1985-02-11

申请人： Bjorn Hammarskog

发明人： Bjorn Hammarskog

IPC分类号： C21B13/00 ,  C21B13/08 ,  C22B5/12

CPC分类号： C21B13/0086 ,  C21B13/08 ,  C22B5/12

摘要： A method and a means for continuously producing a preformed metal product through direct reduction of a material containing ferric oxide in a shaft furnace and feeding the product manufactured in the shaft furnace via a gas lock into a hot preforming machine, the hot product obtained from the shaft furnace being kept at the temperature required for the subsequent hot preforming process, preferably at least about 550.degree. C., by means of hot, non-combustible gas consisting primarily of N.sub.2 and/or CO.sub.2 which has been heated by excess heat from the shaft furnace.

摘要翻译： 一种用于通过在竖炉中直接还原含有三氧化二铁的材料连续生产预成型金属制品的方法和装置，并且将通过气锁将在竖炉中制造的产品进料到热预成型机中， 竖炉保持在随后的热预成型过程所需的温度下，优选至少约550℃，借助于主要由N 2和/或CO 2组成的热不可燃气体，其已被来自 竖炉。

公开(公告)号：US4405362A

公开(公告)日：1983-09-20

申请号：US402716

申请日：1982-07-28

申请人： William V. Bauer

发明人： William V. Bauer

IPC分类号： C21B13/00 ,  C21B13/08

CPC分类号： C21B13/08 ,  C21B13/0066 ,  Y02P10/136 ,  Y02P10/212

摘要： In the direct reduction of iron ore, there is recovered a solid mixture of carbonaceous reductant and used flux, followed by dispersion of the mixture in an aqueous liquid and carbonation of the flux in the mixture in order to enable effective separation of the used flux from the carbonaceous reductant. After separation, the carbonaceous reductant is recycled to the reducing of iron ore.

摘要翻译： 在铁矿石的直接还原中，回收了碳质还原剂和二氧化碳助剂的固体混合物，然后将混合物分散在水性液体中，并将​​助熔剂碳酸化在混合物中，以便有效地将所用助焊剂从 碳质还原剂。 分离后，碳质还原剂再循环到铁矿石的还原中。