公开(公告)号：US20120007292A1

公开(公告)日：2012-01-12

申请号：US13193813

申请日：2011-07-29

申请人： Koji Tokuda ,  Shoichi Kikuchi ,  Osamu Tsuge

发明人： Koji Tokuda ,  Shoichi Kikuchi ,  Osamu Tsuge

IPC分类号： F27B3/22 ,  F27B7/36 ,  F27B7/30

CPC分类号： C21B13/105 ,  C21B13/0006 ,  C21B13/0073 ,  C22B1/245 ,  C22B5/10 ,  F27B9/16 ,  F27D7/06

摘要： A feedstock-feeding step of feeding a feedstock containing a carbonaceous reductant and an iron oxide-containing material into a rotary hearth furnace, a heating/reducing step of heating the feedstock to reduce iron oxide contained in the feedstock into reduced iron, a melting step of melting the reduced iron, a cooling step of cooling the molten reduced iron, and a discharging step of discharging the cooled reduced iron are performed in that order in the direction that a hearth is moved. The furnace includes flow rate-controlling partitions, arranged therein, for controlling the flow of furnace gas and the furnace gas in the cooling step is allowed to flow in the direction of the movement of the hearth with the partitions.

摘要翻译： 将含有碳质还原剂和含氧化铁的材料的原料进料到转底炉中的原料给料步骤，加热还原步骤，加热原料以将原料中所含的氧化铁还原成还原铁;熔融步骤 对还原铁进行熔融，冷却熔融还原铁的冷却步骤，以及排出冷却的还原铁的排出步骤按照炉床移动方向的顺序进行。 该炉包括设置在其中的流量控制分隔板，用于控制炉内气体的流动，并且允许冷却步骤中的炉内气体沿着具有隔板的炉床运动方向流动。

公开(公告)号：US08012236B2

公开(公告)日：2011-09-06

申请号：US10553199

申请日：2004-03-11

申请人： Koji Tokuda ,  Shoichi Kikuchi ,  Osamu Tsuge

发明人： Koji Tokuda ,  Shoichi Kikuchi ,  Osamu Tsuge

IPC分类号： C21B7/16

CPC分类号： C21B13/105 ,  C21B13/0006 ,  C21B13/0073 ,  C22B1/245 ,  C22B5/10 ,  F27B9/16 ,  F27D7/06

摘要： It is an object of the present invention to provide a technique for solving the following problem by properly controlling the flow of gas such as air (oxidizing gas): a problem that the degree of reduction cannot be increased due to the air entering a feedstock-feeding zone or a discharging zone. The technique is a method for producing reduced iron. The method includes a feedstock-feeding step of feeding a feedstock containing a carbonaceous reductant and an iron oxide-containing material into a rotary hearth furnace, a heating/reducing step of heating the feedstock to reduce iron oxide contained in the feedstock into reduced iron, a melting step of melting the reduced iron, a cooling step of cooling the molten reduced iron, and a discharging step of discharging the cooled reduced iron, these steps being performed in that order in the direction that a hearth is moved. The furnace includes flow rate-controlling partitions, arranged therein, for controlling the flow of furnace gas and the furnace gas in the cooling step is allowed to flow in the direction of the movement of the hearth with the partitions.

摘要翻译： 本发明的目的是提供一种通过适当地控制气体（例如空气（氧化气体））的流动来解决以下问题的技术：由于进入原料的空气而导致的降低程度不能增加的问题， 进料区或排放区。 该技术是生产还原铁的方法。 该方法包括将含有碳质还原剂和含铁氧化物的原料的原料进料到转底炉中的原料给料步骤，加热还原步骤，将原料中所含的氧化铁还原为还原铁， 熔化还原铁的熔融步骤，冷却还原铁的冷却步骤以及对冷却的还原铁进行排放的排出步骤，这些步骤按照炉床移动方向的顺序进行。 该炉包括设置在其中的流量控制分隔板，用于控制炉内气体的流动，并且允许冷却步骤中的炉内气体沿着具有隔板的炉床运动方向流动。

公开(公告)号：US20070034055A1

公开(公告)日：2007-02-15

申请号：US10553199

申请日：2004-03-11

申请人： Koji Tokuda ,  Shoichi Kikuchi ,  Osamu Tsuge

发明人： Koji Tokuda ,  Shoichi Kikuchi ,  Osamu Tsuge

IPC分类号： C21B13/08

CPC分类号： C21B13/105 ,  C21B13/0006 ,  C21B13/0073 ,  C22B1/245 ,  C22B5/10 ,  F27B9/16 ,  F27D7/06

摘要： It is an object of the present invention to provide a technique for solving the following problem by properly controlling the flow of gas such as air (oxidizing gas): a problem that the degree of reduction cannot be increased due to the air entering a feedstock-feeding zone or a discharging zone. The technique is a method for producing reduced iron. The method includes a feedstock-feeding step of feeding a feedstock containing a carbonaceous reductant and an iron oxide-containing material into a rotary hearth furnace, a heating/reducing step of heating the feedstock to reduce iron oxide contained in the feedstock into reduced iron, a melting step of melting the reduced iron, a cooling step of cooling the molten reduced iron, and a discharging step of discharging the cooled reduced iron, these steps being performed in that order in the direction that a hearth is moved. The furnace includes flow rate-controlling partitions, arranged therein, for controlling the flow of furnace gas and the furnace gas in the cooling step is allowed to flow in the direction of the movement of the hearth with the partitions.

摘要翻译： 本发明的目的是提供一种通过适当地控制气体（例如空气（氧化气体））的流动来解决以下问题的技术：由于进入原料的空气而导致的降低程度不能增加的问题， 进料区或排放区。 该技术是生产还原铁的方法。 该方法包括将含有碳质还原剂和含铁氧化物的原料的原料进料到转底炉中的原料给料步骤，加热还原步骤，将原料中所含的氧化铁还原为还原铁， 熔化还原铁的熔融步骤，冷却还原铁的冷却步骤以及对冷却的还原铁进行排放的排出步骤，这些步骤按照炉床移动方向的顺序进行。 该炉包括设置在其中的流量控制分隔板，用于控制炉内气体的流动，并且允许冷却步骤中的炉内气体沿着具有隔板的炉床运动方向流动。

公开(公告)号：US20130098202A1

公开(公告)日：2013-04-25

申请号：US13807442

申请日：2011-06-27

申请人： Osamu Tsuge ,  Itsuo Miyahara ,  Shuzo Ito

发明人： Osamu Tsuge ,  Itsuo Miyahara ,  Shuzo Ito

IPC分类号： C21C5/52

CPC分类号： C21C5/52 ,  C21C5/5252 ,  C22B1/245 ,  C22B5/10 ,  Y02P10/214 ,  Y02P10/234

摘要： A process for producing a molten steel (G) is disclosed in which particulate metallic iron can be more efficiently melted. The process includes the step of melting, in an electric arc furnace (2), all charge for iron which comprises: particulate metallic iron (A) produced by a method including a step in which a feed material comprising a carbonaceous reducing material and an iron oxide-containing substance is heated in a rotary hearth furnace (1) as a reducing/melting furnace and the iron oxide contained in the feed material is thereby reduced in the solid state to yield metallic iron and a step in which the resultant metallic iron is heated to a higher temperature to melt the metallic iron and the molten iron is aggregated while separating the iron from the slag (B); and scraps (D) which are another feed material for iron. The process is characterized in that the content of carbon in the particulate metallic iron (A) is regulated to 1.0-4.5 mass % and the carbon in the particulate metallic iron (A) is burned by oxygen blowing. The process is further characterized in that the particulate metallic iron (A) is used in an amount of 40-80 mass % with respect to all charge for iron and that the scraps (D) are initially charged into the electric arc furnace (2) to obtain molten iron (F) and then the particulate metallic iron (A) is continuously charged into the molten iron (F).

摘要翻译： 公开了一种用于生产钢水（G）的方法，其中可以更有效地熔化颗粒状金属铁。 该方法包括在电弧炉（2）中熔化铁的所有装料，其包括：通过包括以下步骤的方法制备的颗粒状金属铁（A），其中包括含碳还原材料和铁 含氧物质在作为还原/熔融炉的旋转炉床炉（1）中被加热，并且由此在原料中包含的氧化铁在固态下降低以产生金属铁，并且所得到的金属铁为 加热到更高的温度以熔化金属铁，并且铁水从炉渣（B）分离时聚集; 和作为铁的另一种饲料的废料（D）。 该方法的特征在于，将金属铁颗粒（A）中的碳含量调节为1.0-4.5质量％，并且通过吹氧将金属铁颗粒（A）中的碳燃烧。 该方法的特征还在于，金属铁（A）的使用量相对于铁的所有电荷为40-80质量％，并且废料（D）最初被装入电弧炉（2） 以获得铁水（F），然后将颗粒金属铁（A）连续地装入铁水（F）中。

公开(公告)号：US07846235B2

公开(公告)日：2010-12-07

申请号：US12183871

申请日：2008-07-31

申请人： Shoichi Kikuchi ,  Osamu Tsuge ,  Gilbert Yould Whitten ,  Brian William Voelker

发明人： Shoichi Kikuchi ,  Osamu Tsuge ,  Gilbert Yould Whitten ,  Brian William Voelker

IPC分类号： C21B13/08

CPC分类号： C21B13/008 ,  C21B13/0006 ,  C21B13/0066 ,  C21B13/105 ,  C22B1/245 ,  F27B9/16 ,  F27D1/0006 ,  Y02P10/136

摘要： A method for producing metallic iron in which a mixture including a carbonaceous reducing agent and iron oxide is fed onto a hearth of a moving hearth reducing-melting furnace and is then heated so that the iron oxide is reduced and melted. Metallic iron to be obtained is cooled and is then discharged outside the furnace for recovery. Prior to the feed of raw agglomerates, a granular hearth material is bedded on the moving hearth for forming a layered renewable hearth which can be renewed. Part or the entirety of the renewable hearth which was degraded during operation is renewed, and the hearth material for forming a new renewable hearth is fed. The surface of the newly formed hearth is then leveled and mixture is subsequently fed.

摘要翻译： 一种金属铁的制造方法，其中将含有碳质还原剂和氧化铁的混合物供给到移动炉床还原熔融炉的炉床上，然后被加热，使得氧化铁被还原和熔化。 将得到的金属铁冷却，然后排出炉外进行回收。 在进料原料团块之前，将一个颗粒状的炉床材料铺在移动的炉床上，以便形成可更新的层状可再生炉床。 在运行期间退化的可再生炉床的全部或全部更新，并且用于形成新的可再生炉床的炉床材料被供给。 然后将新形成的炉床的表面平整，随后加入混合物。

公开(公告)号：US20060096675A1

公开(公告)日：2006-05-11

申请号：US10542359

申请日：2004-01-16

申请人： Shoichi Kikuchi ,  Osamu Tsuge ,  Gilbert Whitten ,  Brian Voelker

发明人： Shoichi Kikuchi ,  Osamu Tsuge ,  Gilbert Whitten ,  Brian Voelker

IPC分类号： C21D1/84

CPC分类号： C21B13/008 ,  C21B13/0006 ,  C21B13/0066 ,  C21B13/105 ,  C22B1/245 ,  F27B9/16 ,  F27D1/0006 ,  Y02P10/136

摘要： An object of the present invention is to provide a method for producing metallic iron, in which after a mixture including a carbonaceous reducing agent and iron oxide is fed onto a hearth of a moving hearth reducing-melting furnace and is then heated so that the iron oxide is reduced and melted, metallic iron to be obtained is cooled and is then discharged outside the furnace for recovery. In the method described above, even when powdered metallic iron is squeezed into the surface of the hearth, or the hearth is damaged by slag infiltration and corrosion, the removal and repair can be easily performed, the operation rate and maintenability of the hearth can be improved, and hence a long continuous operation can be suitably performed. According to the present invention, metallic iron is produced by the steps of, prior to the feed of raw agglomerates, bedding a granular hearth material on the moving hearth for forming a layered renewable hearth, which can be renewed; removing part or the entirety of the renewable hearth, which was degraded during operation, and then newly feeding the hearth material for forming a new renewable hearth; leveling the surface of the newly formed hearth; and subsequently feeding the mixture.

摘要翻译： 本发明的目的是提供一种金属铁的制造方法，其中将含有碳质还原剂和氧化铁的混合物供给到移动的炉床还原熔融炉的炉床上，然后加热，使铁 氧化物被还原和熔化，所得到的金属铁被冷却，然后排出炉外进行回收。 在上述方法中，即使粉末状的金属铁被挤压到炉床的表面，或者炉底被熔渣腐蚀而损坏的情况下，可以容易地进行除去和修理，炉床的运转率和可维护性可以 可以适当地进行长连续的操作。 根据本发明，通过以下步骤制造金属铁，在原料团聚体的供给之前，将活性炉床上的粒状炉床材料层叠，形成可更新的层状可再生炉床; 去除在运行期间退化的可再生炉床的一部分或全部，然后新加入用于形成新的可再生炉床的炉床材料; 平整新形成的炉膛的表面; 并随后进料该混合物。

公开(公告)号：US20130118307A1

公开(公告)日：2013-05-16

申请号：US13811782

申请日：2011-07-29

申请人： Shoichi Kikuchi ,  Osamu Tsuge

发明人： Shoichi Kikuchi ,  Osamu Tsuge

IPC分类号： F27B3/10 ,  C21B11/08 ,  F27B3/06

CPC分类号： F27B3/10 ,  C21B11/08 ,  C21B13/105 ,  F27B3/06 ,  F27B9/24

摘要： A device for producing granular metal iron by placing a mass of a raw material mixture comprising a substance containing iron oxide and a carbonaceous reducing agent onto a heath of a moving heath type heating furnace and heating the mass to reduce iron oxide in the mass, thereby producing the granular metal iron. The device comprises, in addition to the moving heath type heating furnace, a sieving machine, a first magnetic separator and a second magnetic separator, and also comprises a passage through which a discharged substance from the moving heath type heating furnace is supplied to the sieving machine, a passage through which crude granules that have been sieved by the sieving machine are supplied to the first magnetic separator, and a passage through which fine granules that have been sieved by the sieving machine are supplied to the second magnetic separator.

摘要翻译： 通过将包含含有氧化铁和碳质还原剂的物质的原料混合物的块放入移动的健康型加热炉的
蒸发器上并加热该物质以还原该物质中的氧化铁，从而生产颗粒状金属铁的装置，从而 生产颗粒状金属铁。 该装置除了移动的健康型加热炉之外还包括筛分机，第一磁选机和第二磁选机，还包括一个通道，将来自移动式加热炉的排出物质通过该通道供给到筛分机 机器，将通过筛分机筛过的粗颗粒供给到第一磁选机的通道，并且将通过筛分机筛选的细颗粒供给到第二磁选机的通道。

公开(公告)号：US08187359B2

公开(公告)日：2012-05-29

申请号：US12282187

申请日：2006-03-24

申请人： Koji Tokuda ,  Osamu Tsuge

发明人： Koji Tokuda ,  Osamu Tsuge

IPC分类号： C21B13/10 ,  C22B1/16

CPC分类号： C21B13/10 ,  C21B13/0053 ,  C21B13/0093 ,  Y10T428/12181

摘要： An object of the present invention is to provide a method for producing granulated metallic iron superior in rust resistance. Another object of the present invention is to provide a method for producing such granulated metallic iron. In the method, the granulated metallic iron is produced by agglomerating a material mixture including an iron-oxide-containing material and a carbonaceous reducing agent; charging and heating the agglomerated material mixture in a moving hearth-type reducing furnace to reduce the iron oxide in the material mixture with the carbonaceous reducing agent to obtain hot granulated metallic iron; and cooling the hot granulated metallic iron, wherein the hot granulated metallic iron is cooled while its relative position is changed; and an oxide coating is formed on the surface of the hot granulated metallic iron by bringing moisture into contact with almost the entire surface of the hot granulated metallic iron.

摘要翻译： 本发明的目的在于提供一种耐锈性优异的造粒金属铁的制造方法。 本发明的另一个目的是提供一种生产这种颗粒状金属铁的方法。 在该方法中，颗粒状金属铁通过将包含含铁氧化物的材料和碳质还原剂的材料混合物凝聚而制成; 在移动的炉床式还原炉中加热和加热凝聚的材料混合物，以减少与碳质还原剂的材料混合物中的氧化铁，得到热颗粒金属铁; 并冷却热粒状金属铁，其中热粒状金属铁在其相对位置改变时被冷却; 并且通过使水分与热粒状金属铁的整个表面接触而在热粒状金属铁的表面上形成氧化物涂层。

公开(公告)号：US20060169103A1

公开(公告)日：2006-08-03

申请号：US10548955

申请日：2004-02-24

申请人： Shuzo Ito ,  Osamu Tsuge

发明人： Shuzo Ito ,  Osamu Tsuge

IPC分类号： C21B13/00 ,  C21B15/00

CPC分类号： C21B13/008 ,  C21B13/0006 ,  C21B13/105 ,  C22B1/22 ,  C22B1/245 ,  C22B5/10 ,  Y02P10/136

摘要： The amounts of a CaO-containing substance, an MgO-containing substance, and a SiO2-containing substance, contained in a raw material mixture, are adjusted such that manufacturing operation is performed with the slag basicity (CaO+MgO)/SiO2 of 1.3 to 2.3, and with MgO-concentration of 5 to 13% by mass as to the slag composition, which are dependent upon the concentration of each of CaO, MgO, and SiO2, contained in the raw material mixture. This provides a manufacturing method for high-quality granulated metallic iron with low sulfur concentration, wherein a raw material mixture containing an iron-oxide-containing substance such as iron ore and a carbonaceous reducing agent such as a carbon material are subjected to reducing and melting with a moving hearth-type reducing furnace while suppressing sulfur concentration as much as possible, generated in the granulated metallic iron, particularly due to the carbon material such as coal.

摘要翻译： 包含在原料混合物中的含CaO物质，含MgO物质和含SiO 2物质的量被调节，使得制造操作以炉渣碱度（ CaO + MgO）/ SiO 2/2为1.3〜2.3，MgO组合物的MgO浓度为5〜13质量％，这取决于CaO，MgO， 和SiO 2，包含在原料混合物中。 这提供了一种低硫浓度的优质颗粒状金属铁的制造方法，其中将含有铁氧化物的物质如碳酸钙和碳质还原剂如碳材料的原料混合物进行还原和熔融 同时在颗粒状金属铁中产生的尽可能多的硫浓度，特别是由于诸如煤等碳材料而产生的移动的炉式还原炉。

公开(公告)号：US20090183600A1

公开(公告)日：2009-07-23

申请号：US12183871

申请日：2008-07-31

申请人： Shoichi Kikuchi ,  Osamu Tsuge ,  Gilbert Yould Whitten ,  Brian William Voelker

发明人： Shoichi Kikuchi ,  Osamu Tsuge ,  Gilbert Yould Whitten ,  Brian William Voelker

IPC分类号： C21B11/08

CPC分类号： C21B13/008 ,  C21B13/0006 ,  C21B13/0066 ,  C21B13/105 ,  C22B1/245 ,  F27B9/16 ,  F27D1/0006 ,  Y02P10/136

摘要： A method for producing metallic iron in which a mixture including a carbonaceous reducing agent and iron oxide is fed onto a hearth of a moving hearth reducing-melting furnace and is then heated so that the iron oxide is reduced and melted. Metallic iron to be obtained is cooled and is then discharged outside the furnace for recovery. Prior to the feed of raw agglomerates, a granular hearth material is bedded on the moving hearth for forming a layered renewable hearth which can be renewed. Part or the entirety of the renewable hearth which was degraded during operation is renewed, and the hearth material for forming a new renewable hearth is fed. The surface of the newly formed hearth is then leveled and mixture is subsequently fed.

摘要翻译： 一种金属铁的制造方法，其中将含有碳质还原剂和氧化铁的混合物供给到移动炉床还原熔融炉的炉床上，然后被加热，使得氧化铁被还原和熔化。 将得到的金属铁冷却，然后排出炉外进行回收。 在进料原料团块之前，将一个颗粒状的炉床材料铺在移动的炉床上，以便形成可更新的层状可再生炉床。 在运行期间退化的可再生炉床的全部或全部更新，并且用于形成新的可再生炉床的炉床材料被供给。 然后将新形成的炉床的表面平整，随后加入混合物。