公开(公告)号：US20040244532A1

公开(公告)日：2004-12-09

申请号：US10886720

申请日：2004-07-08

Inventor： Walter N. Blejde ,  Joel Sommer

IPC: C21C005/30

CPC classification number: F27D19/00 ,  B22D1/00 ,  B22D46/00 ,  C21C7/0075 ,  C21C7/06 ,  C21C7/064 ,  C21C7/072 ,  F27D21/00 ,  F27D21/0014 ,  F27D2019/0003

Abstract: A system for determining process parameters for the ladle refinement of steel includes a computer executing a number of software algorithms for determining one or more process parameters for various steel refinement process steps. In one embodiment, for example, the computer is configured to determine the total amount of flux additions to achieve a desired sulfur percentage as part of a steel desulfurization process. In another embodiment, the computer is configured to determine the total quantity of oxygen to be injected into the steel as part of a steel reoxidation process. In still another embodiment, the computer is configured to determine a melting temperature of inclusions within the refined steel, and to determine whether this melting temperature is within an acceptable range to successfully process the steel in a continuous steel strip casting apparatus/process, or whether the steel must be reworked to achieve an acceptable inclusion melting temperature.

Abstract translation: 用于确定钢包的钢包精炼的工艺参数的系统包括执行许多软件算法的计算机，用于确定用于各种钢精炼工艺步骤的一个或多个工艺参数。 在一个实施例中，例如，计算机被配置为确定作为钢脱硫过程的一部分来实现所需硫百分比的助焊剂添加量的总量。 在另一个实施例中，计算机被配置为确定作为钢再氧化过程的一部分而被注入到钢中的氧的总量。 在另一个实施例中，计算机被配置为确定精炼钢内的夹杂物的熔融温度，并且确定该熔融温度是否在可接受的范围内以在连续钢带铸造设备/工艺中成功地处理钢，或者是否 钢必须进行再加工以达到可接受的夹杂物熔融温度。

公开(公告)号：US20040079199A1

公开(公告)日：2004-04-29

申请号：US10282507

申请日：2002-10-29

Inventor： Randal S. Harris

IPC: C21C005/30

CPC classification number: C21C7/06 ,  C21C7/0037 ,  C21C7/0075

Abstract: A method for making killed steel that permits use of high-carbon manganese without increasing the carbon content of the steel to an unacceptable level. During tapping from the furnace into the ladle, a carbon-containing manganese, and advantageously a high-carbon manganese, is first added to the molten steel, followed thereafter by addition of a strong deoxidizer. The carbon-containing manganese addition reduces the free oxygen content in the molten steel such that less of a strong deoxidizer is subsequently needed to achieve the remainder of the desired oxygen reduction.

Abstract translation: 制造能够在不将钢的碳含量提高的情况下使用高碳锰的杀死钢的方法达到不可接受的水平。 在从炉中进入钢包中时，首先将含碳锰，有利地是高碳锰添加到钢水中，然后加入强力的脱氧剂。 含碳的锰添加剂减少了钢水中的游离氧含量，使得随后需要较少的强脱氧剂以达到所需氧还原的余量。

公开(公告)号：US20030102609A1

公开(公告)日：2003-06-05

申请号：US10218741

申请日：2002-08-14

Applicant: Bethlehem Steel Corporation

Inventor： Thomas P. Swift

IPC: C21C005/30

CPC classification number: C21C5/4673 ,  C21C5/462

Abstract: The present invention is directed to an oxygen lance crane assembly that includes a measuring device positioned to take measurements to a target area within a BOF vessel. The measuring device includes an optical head for receiving and directing an energy beam to the target area within an associated metallurgical vessel, and for receiving and directing a reflected energy beam to a processor that converts the reflected energy beam into a distance measurement. A drive means, provided within a housing fastened to the lance crane assembly, is attached to the optical head so that when the drive means is operated the optical head is either extended through an opening in the housing to a remote measuring position at a line of sight to the target area within the metallurgical vessel, or retracted back through the opening to a stored position within the housing. The drive is also attached to a cover that is removed from the opening when the optical head is extended and placed over the opening when the optical head is retracted. An air purge is injected into the interior of the housing to cool the housing space and maintain a positive pressure within the housing.

Abstract translation: 本发明涉及一种氧枪起重机组件，其包括定位成对BOF容器内的目标区域进行测量的测量装置。 测量装置包括光学头，用于接收并引导能量束到相关联的冶金容器内的目标区域，并且用于接收和引导反射的能量束到将反射的能量束转换成距离测量的处理器。 设置在紧固到喷枪式起重机组件的壳体内的驱动装置附接到光学头，使得当驱动装置被操作时，光学头或者通过壳体中的开口延伸到远离测量位置 瞄准冶金容器内的目标区域，或者通过开口回缩到壳体内的存储位置。 驱动器也附接到当光学头延伸并且当光学头缩回时放置在开口上方的从开口移除的盖子。 空气吹扫被注入到壳体的内部以冷却壳体空间并在壳体内保持正压力。

公开(公告)号：US20020002880A1

公开(公告)日：2002-01-10

申请号：US09837077

申请日：2001-04-18

Inventor： Milorad Pavlicevic ,  Gianni Burba ,  Allessandra Primavera ,  Fabio Guastini

IPC: C21B009/14 ,  C21C005/30

CPC classification number: C21C5/52 ,  C21B13/0086 ,  C21B13/14 ,  Y02P10/136 ,  Y02P10/216

Abstract: The present invention relates to a high energy-saving process for preheating and final reduction of directly reduced iron (DRI) to be conveyed to a melting process, by using melting furnace off-gas, which is characterized by a high temperature and a high CO-content.

Abstract translation: 本发明涉及一种用于预热和最终还原直接还原铁（DRI）的高节能方法，其通过使用熔化炉废气（其特征在于高温和高CO -内容。

公开(公告)号：US20040000747A1

公开(公告)日：2004-01-01

申请号：US10179220

申请日：2002-06-26

Inventor： William John Mahoney ,  Terrance T. Pavlack

IPC: C21C005/30

CPC classification number: F27D3/16 ,  C21C5/4606 ,  C21C5/5217 ,  F23D14/22 ,  F23D14/32 ,  F27B3/225 ,  F27D2003/164 ,  F27D2003/165 ,  F27D2003/168 ,  Y02P10/216

Abstract: A coherent jet lance and operating method wherein the need for a lance extension is eliminated using two rings of ports to deliver respectively fuel and oxidant flame envelope gases around the primary gas jets to maintain the gas jets coherent wherein the ports of the two rings are aligned on the lance face.

公开(公告)号：US20020007699A1

公开(公告)日：2002-01-24

申请号：US09815574

申请日：2001-03-23

Inventor： Stephen C. Montague ,  Brian W. Voelker ,  Russell Kakaley

IPC: C21C001/04 ,  C21C005/30

CPC classification number: F23C6/047 ,  B01J19/26 ,  B01J2219/00058 ,  B01J2219/00094 ,  B01J2219/00123 ,  B01J2219/00155 ,  B01J2219/00157 ,  B01J2219/00159 ,  B01J2219/00164 ,  C01B3/363 ,  C01B3/384 ,  C01B2203/0233 ,  C01B2203/0255 ,  C01B2203/0816 ,  C01B2203/0822 ,  C01B2203/141 ,  C01B2203/142 ,  C21B13/0073 ,  C21B13/02 ,  C21B2100/64 ,  C22B5/12 ,  Y02P10/136 ,  Y02P20/128

Abstract: An apparatus and method for adjusting the parameters of a reducing gas stream prior to introduction into a direct reduction furnace, such parameters including temperature of the gas stream, and amount of hydrocarbon, carbon monoxide, and hydrogen contained in the reducing gas. The apparatus is placed in-line with the reducing gas recycle loop of a direct reduction furnace, which has an enrichment section which introduces hydrocarbon components to the main stream, and an oxygen/fuel injection system, located downstream from the enrichment section, which injects a shrouded stream of oxygen and hydrocarbon gas into the reducing gas stream. Temperature, carbon monoxide content, and hydrogen content of the reducing gas are adjusted by controlling the flow of oxygen and the ratio of hydrocarbon to oxygen injected in the oxygen/fuel injection system. Hydrocarbon content of the reducing gas is adjusted primarily by controlling the flow rate of the enrichment section.

Abstract translation: 在引入直接还原炉之前调整还原气流的参数的装置和方法，包括气流的温度，还原气体中所含的烃，一氧化碳和氢的量等参数。 该设备与直接还原炉的还原气体循环回路连接，该直接还原炉具有将烃组分引入主流的富集部分，以及位于浓缩部分下游的氧/燃料喷射系统，其注入 氧气和烃气体被覆盖的气流进入还原气流。 通过控制氧气流和氧气/燃料喷射系统中注入的烃与氧的比例来调节还原气体的温度，一氧化碳含量和氢含量。 还原气体的烃含量主要通过控制浓缩部分的流量来调节。

公开(公告)号：US20010003930A1

公开(公告)日：2001-06-21

申请号：US09781816

申请日：2001-02-12

Inventor： Stephen C. Montague ,  Russell Kakaley ,  Gregory D. Hughes ,  Gary E. Metius

IPC: C21B011/02 ,  C21B013/02 ,  C21C001/04 ,  C21C005/30

CPC classification number: C22B5/12 ,  B01J2219/00058 ,  B01J2219/00094 ,  B01J2219/00123 ,  B01J2219/00155 ,  B01J2219/00157 ,  B01J2219/00159 ,  B01J2219/00164 ,  C01B3/363 ,  C01B3/384 ,  C01B2203/0233 ,  C01B2203/0255 ,  C01B2203/0816 ,  C01B2203/141 ,  C01B2203/142 ,  C21B13/0073 ,  C21B13/02 ,  C21B2100/64 ,  Y02P10/136

Abstract: An improved method and apparatus for increasing the productivity of a direct reduction process in which iron oxide is reduced to metallized iron by contact with hot reducing gas; comprising the steps of: a) providing a first hot reducing gas consisting essentially of CO and H2; b) providing additional reducing gas by reaction of a gaseous or liquid hydrocarbon fuel with oxygen; c) mixing the first hot reducing gas with the additional reducing gas to form a reducing gas mixture; d) enriching the reducing gas mixture by the addition of a gaseous or liquid hydrocarbon; e) injecting oxygen or oxygen-enriched air into the enriched mixture; and f) introducing the enriched mixture into an associated direct reduction furnace as reducing gas.

Abstract translation: 一种用于提高通过与热还原气体接触将氧化铁还原成金属化铁的直接还原工艺的生产率的改进方法和装置; 包括以下步骤：a）提供基本上由CO和H 2组成的第一热还原气体; b）通过气态或液态烃燃料与氧气的反应提供额外的还原气体; c）将第一热还原气体与另外的还原气体混合以形成还原气体混合物; d）通过加入气态或液态烃来富集还原气体混合物; e）将氧气或富氧空气注入富集的混合物中; 和f）将富集的混合物引入相关的直接还原炉中作为还原气体。

公开(公告)号：US20040182203A1

公开(公告)日：2004-09-23

申请号：US10482560

申请日：2003-12-30

Inventor： Ryuji Nakao ,  Tomoaki Tanaka ,  Masao Igarashi ,  Koichiro Yoshino

IPC: C21C005/30

CPC classification number: C21C7/0685 ,  C21B5/001 ,  C21C5/005 ,  C21C5/4673 ,  C21C7/072 ,  C21C7/10 ,  C21C2300/06 ,  Y02P10/286 ,  Y10S706/904

Abstract: The present invention: solves the problems of hitherto disclosed technologies, such as insufficient suppression of the oxidation loss of nullCrnull and the excessive erosion of refractories, in the decarburization-refining of chromium-contained molten steel under a normal or reduced pressure; and is characterized by: determining, in sequence; a molten steel temperature during the refining through actual measurement or computation from a molten steel temperature before the refining and refining conditions; nullCnull and nullCrnull concentrations during the refining through actual measurement or computation from molten steel components before the refining and refining conditions; a CO partial pressure PCO in an atmosphere during the refining from the total pressure P of the atmosphere, an oxygen gas supply rate and an inert gas supply rate; a Hilty's equilibrium temperature TH from said nullCnull and nullCrnull concentrations and PCO; the difference nullT between said molten steel temperature during the refining and said Hilty's equilibrium temperature TH: and controlling the refining conditions so that said nullT is equal to a prescribed value or higher.

Abstract translation: 本发明解决了在正常或减压下含铬钢水的脱碳精炼中迄今为止公开的技术的诸如不充分抑制[Cr]的氧化损失和耐火材料过度侵蚀的技术的问题; 其特征在于：依次确定 精炼过程中的钢水温度在精炼和精炼条件之前由钢水温度进行实际测量或计算; 在精炼过程中，通过在精炼和精炼条件之前从钢水部件进行实际测量或计算，精炼中的[C]和[Cr]浓度; 在从大气的总压力P的精炼期间的气氛中的CO分压PCO，氧气供给速率和惰性气体供给速率; 来自所述[C]和[Cr]浓度和PCO的Hilty平衡温度TH; 在精炼期间的所述钢水温度与所述Hilty的平衡温度TH之间的差ΔTt，并控制精炼条件使得所述ΔT等于或等于规定值以上。

公开(公告)号：US20030205109A1

公开(公告)日：2003-11-06

申请号：US10411676

申请日：2003-04-11

Applicant: KAWASAKI STEEL CORPORATION

Inventor： Tetsuo Akiyoshi

IPC: C21C005/30

CPC classification number: F27D3/14 ,  F27D17/001 ,  F27D17/008 ,  F27D2009/0086

Abstract: Fume dust is prevented when molten metal is poured into a vessel, and water or water mist is sprayed into the vessel or onto the molten metal, creating a reduced level of oxygen concentration of about 12% by volume, preferably about 8% by volume, inside the vessel or at the molten metal surface.

Abstract translation: 当将熔融金属倒入容器中时，防止了灰尘，并将水雾或水雾喷入容器或熔融金属上，形成约12体积％，优选约8体积％的氧浓度降低， 在容器内或熔融金属表面。

公开(公告)号：US20020148328A1

公开(公告)日：2002-10-17

申请号：US09978162

申请日：2001-10-16

Inventor： K. Jaqueline Holz ,  Jean-Jacques Duruz

IPC: C21C005/30 ,  C22B026/00 ,  C22B015/00 ,  C22B021/00 ,  C21C007/00 ,  B05D003/02

CPC classification number: F27D27/00 ,  C04B41/5037 ,  C04B41/507 ,  C04B41/87 ,  C22B9/05 ,  C22B21/064 ,  F27D1/0006 ,  F27D1/1684

Abstract: An apparatus for treating, in particular purifying or degassing, molten metal (40), comprising a component (10) exposable to molten metal to be treated and means (13) for imparting a rotary motion to the molten metal (40) about a substantially vertical axis. The apparatus is so arranged that during use at least part of a wear-exposed surface of the component (10) is temporarily or permanently in contact with molten metal (40), the contacting molten metal being in motion relative to the wear-exposed surface. The wear-exposed surface is coated with a slurry-applied protective coating (18A,18B) of refractory material in a heat stable binder, in particular an inorganic colloidal and/or polymeric binder, protecting the wear-exposed surface against erosion, oxidation and corrosion.

Abstract translation: 一种用于处理，特别是净化或脱气的熔融金属（40）的装置，包括可暴露于待处理的熔融金属的组分（10）和用于向熔融金属（40）施加旋转运动的装置（13） 垂直轴。 该设备被布置成使得在使用期间，部件（10）的磨损暴露表面的至少一部分暂时或永久地与熔融金属（40）接触，接触熔融金属相对于磨损表面 。 磨损的表面在耐热材料的涂料保护涂层（18A，18B）涂覆在热稳定粘合剂中，特别是无机胶体和/或聚合物粘合剂中，保护磨损表面免受侵蚀，氧化和 腐蚀。