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公开(公告)号：EP2796565A4
公开(公告)日：2015-11-04
申请号：EP12859458
申请日：2012-03-01
申请人： JFE STEEL CORP
发明人： MURAO AKINORI , FUJIWARA DAIKI , WATAKABE SHIRO
CPC分类号： C21B5/003 , C21B7/163 , C21B2005/005
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公开(公告)号：EP2653563A4
公开(公告)日：2017-03-08
申请号：EP11856085
申请日：2011-07-15
申请人： JFE STEEL CORP
CPC分类号： C21B5/003 , C21B5/06 , C21B7/163 , C21B2005/005 , C21B2100/26 , C21B2100/60 , Y02P10/283
摘要： Provided is a method for operating a blast furnace in which further improvement in combustion temperature and further reduction of the specific consumption of reducing agents are possible. A double tube lance is used as a lance 4 through which reducing agents are injected into a blast furnace via a tuyere 3. By injecting a solid reducing agent such as pulverized coal 6 and an inflammable reducing agent such as an utility gas 9 through the double tube lance 4 and by setting the oxygen excess ratio of air blown to the tuyere 3 to be from 0.7 to 1.3, there is a significant increase in the temperature of the pulverized coal 6 due to the utility gas 9 which contacts O 2 contained in the blown air in first being burnt, which causes an increase in the heating rate of the pulverized coal 6 and the pulverized coal 6 being sufficiently burnt. As a result, there is a significant increase in combustion temperature, which makes it possible to reduce the specific consumption of reducing agents. At the same time, it is possible to prevent the double tube lance 4 from being deformed due to the increased temperature by setting the flow velocity at the exit of the outer tube of the double tube lance 4 to be from 20 m/sec to 120 m/sec.
摘要翻译： 本发明提供一种高炉的运转方法，能够进一步提高燃烧温度，并且能够进一步降低还原剂的比耗。 双管喷枪用作喷枪4，还原剂通过喷枪3通过风口3喷射到高炉中。通过双喷嘴将固体还原剂如煤粉6和可燃性还原剂如商用气体9喷射到高炉 通过将喷吹到风口3的空气的氧过剩率设定为0.7〜1.3，由于接触了包含在风筒3中的O 2的市电气体9，煤粉6的温度显着上升 首先吹入的空气被燃烧，这导致粉煤6和煤粉6充分燃烧的加热速率增加。 结果，燃烧温度显着增加，这使得可以减少还原剂的特定消耗量。 同时，通过将双管喷枪4的外管的出口处的流速设定为从20m / sec到120，可以防止由于升高的温度导致双管喷枪4变形 米/秒。
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公开(公告)号：EP2987871A4
公开(公告)日：2016-04-27
申请号：EP14785099
申请日：2014-03-28
申请人： JFE STEEL CORP
发明人： MURAO AKINORI , FUJIWARA DAIKI , WATAKABE SHIRO , SATO MICHITAKA , WATANABE TAKASHI , SHIMOMURA AKIO
IPC分类号： C21B5/00
CPC分类号： C21B5/003 , C21B5/007 , F27D3/16 , F27D3/18 , F27D2003/168 , F27D2003/185
摘要： [Task] It is to propose a blast furnace operation method capable of increasing the productivity and decreasing CO 2 emission even in the operation at a pulverized coal ratio of not less than 150 kg/t-p. [Solution] A method of operating a blast furnace by blowing a pulverized coal at an amount of not less than 150 kg/t-p from tuyeres through a lance into a blast furnace, characterized in that when the operation is performed under a condition that lump coke charged from a furnace top has a strength defined in JIS K2151 (DI 150 15 ) of not more than 87%, the pulverized coal blown through the tuyere contains not more than 60 mass% as a weight ratio of coal having a particle size of not more than 74 µm and has an average volatile matter of not more than 25 mass%, and a blast temperature blown through the tuyere is not higher than 1100°C, oxygen is simultaneously blown into the furnace with the blowing of the pulverized coals through the lance and a gas having an oxygen concentration of 60 vol%-97 vol% is used as a carrier gas for the blowing of the pulverized coal.
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公开(公告)号：EP2653565A4
公开(公告)日：2017-03-15
申请号：EP11856543
申请日：2011-07-15
申请人： JFE STEEL CORP
CPC分类号： C21B5/06 , C21B5/003 , C21B7/163 , C21B2005/005 , C21B2100/26 , C21B2100/60 , Y02P10/283
摘要： Provided is a method for operating a blast furnace in which further improvement in combustion temperature and further reduction of the specific consumption of reducing agents are possible. By injecting all of pulverized coal (PC: solid reducing agent), a utility gas (inflammable reducing agent) and O 2 (combustion improving gas) so that each of these are separately injected thorough any one of the inner tube lance, the intermediate tube lance and the outer tube lance which constitute a triple tube lance, there is, for example, an explosive diffusion of the pulverized coal caused by the O 2 and the utility gas burning in first and, at the same time, there is a significant increase in the temperature of the pulverized coal due to the combustion heat of the utility gas, which results in an increase in the heating rate of the pulverized coal and a significant improvement in the combustion temperature, which makes it possible to decrease the specific consumption of the reducing agents. In addition, by injecting some of oxygen to be added to a injected air through the triple tube lance, the excessive supply of oxygen to be used can be avoided and the specific consumption of O 2 can be decreased while gas balance in a blast furnace is maintained.
摘要翻译： 本发明提供一种高炉的运转方法，能够进一步提高燃烧温度，并且能够进一步降低还原剂的比耗。 通过将所有粉煤（PC：固体还原剂），商用气体（可燃性还原剂）和O 2（燃烧改善气体）全部注入，使得这些中的每一个通过内管矛杆，中间管 例如，构成三管喷枪的喷枪和外管喷枪中，首先由O 2和公用燃气引起的煤粉的爆炸性扩散，并且同时显着增加 在由煤气的燃烧热引起的粉煤温度中，导致煤粉加热速率增加和燃烧温度显着提高，这使得可以降低 还原剂。 另外，通过从三重管喷枪喷射注入的空气中的一部分氧气，能够避免所使用的氧气的过剩供给，并且能够降低高炉中的气体平衡的同时消耗O 2的比耗量 保持。
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公开(公告)号：EP2653564A4
公开(公告)日：2017-03-08
申请号：EP11856222
申请日：2011-07-15
申请人： JFE STEEL CORP
CPC分类号： C21B5/001 , C21B5/003 , C21B5/06 , C21B7/163 , C21B2100/26 , C21B2100/60 , Y02P10/283
摘要： Provided is a method for operating a blast furnace in which further improvement in combustion temperature and further reduction of the specific consumption of reducing agents are possible. The mixture of a solid reducing agent and an inflammable reducing agent is injected through the same tube constituting a lance 4. For example, a solid reducing agent and an inflammable reducing agent are mixed and the mixture thereof is injected through a single tube lance 4. In addition, using a double tube lance 4 as the lance, while the mixture of a solid reducing agent and an inflammable reducing agent is injected through the inner tube of the double tube lance 4, a combustion improving gas is injected through the outer tube of the double tube lance. In addition, using a double tube lance 4 as the lance, while a combustion improving gas is injected through the inner tube of the double tube lance 4, the mixture of a solid reducing agent and an inflammable reducing agent is injected through the outer tube of the double tube lance. The solid reducing agent mainly consists of pulverized coal, and a utility gas, converter gas, blast furnace gas, coke oven gas and hydrogen are used as the inflammable reducing agent. O 2 is used as the combustion improving gas.
摘要翻译： 提供了一种操作高炉的方法，其中可以进一步提高燃烧温度并进一步降低还原剂的比消耗。 通过构成喷枪4的同一管道注入固体还原剂和易燃还原剂的混合物。例如，固体还原剂和可燃性还原剂混合，其混合物通过单管喷枪4注入。 此外，使用双管喷枪4作为喷枪，同时通过双管喷枪4的内管注入固体还原剂和可燃性还原剂的混合物，通过外管喷射燃烧改善气体 双管枪。 此外，使用双管喷枪4作为喷枪，同时通过双管喷枪4的内管喷射燃烧改善气体，固体还原剂和易燃还原剂的混合物通过外管 双管枪。 固体还原剂主要由粉煤组成，用作燃气，转炉煤气，高炉煤气，焦炉煤气和氢气作为易燃还原剂。 O 2用作燃烧改进气体。
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6.发明公开METHOD FOR LOADING RAW MATERIAL INTO BLAST FURNACE 审中-公开欧莱雅芬兰的VERFAHREN ZUM LADEN EINES ROHMATERIALS
公开(公告)号：EP2851434A4
公开(公告)日：2015-12-09
申请号：EP13790282
申请日：2013-05-17
申请人： JFE STEEL CORP
摘要： A method for charging blast furnace raw material into a blast furnace, includes, when charging blast furnace raw material including coke and ore material such as sintered ore, pellet, or lump ore into the blast furnace using a rotating chute: mixing the ore material with the coke to produce mixed material; and charging the mixed material into the blast furnace to form a mixed layer in a predetermined region in the blast furnace, in which the mixed material is discharged into the blast furnace at a discharge rate of 1.5 t/s or more to thereby improve homogeneity of the mixed layer.
摘要翻译： 一种将高炉原料装入高炉的方法，包括：使用旋转滑槽向高炉中加入包括焦炭和矿石材料如烧结矿，丸粒或块矿石的高炉原料，将矿石料与 焦炭生产混合材料; 并将混合材料装入高炉中以在高炉中的预定区域中形成混合层，其中混合材料以1.5t / s或更高的排出速率排放到高炉中，从而提高了均匀性 混合层。
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公开(公告)号：EP2796566A4
公开(公告)日：2015-12-02
申请号：EP12860851
申请日：2012-03-01
申请人： JFE STEEL CORP
发明人： FUJIWARA DAIKI , MURAO AKINORI , WATAKABE SHIRO
摘要： A lance 4 for injecting a fuel through a tuyere 3 is a double tube. Pulverized coal is injected through an inner tube 21 of the double wall lance 4. Oxygen is injected through an outer tube 22 of the double wall lance 4. Notches 23 are formed in a injecting front end of the inner tube 21 of the double wall lance 4. The concentration of oxygen in a gas composed of a carrier gas for the pulverized coal and a gas injected through the outer tube is 35% by volume or more. Even in an operation using pulverized coal having a volatile matter content of 25 mass% or less at a high pulverized coal ratio of 150 kg/t or more, the combustion temperature can be increased, and consequently CO 2 emissions can be reduced. The specific oxygen consumption can be suppressed by decreasing the oxygen concentration to less than 70% by volume. The notches 23 may be circumferentially evenly spaced in the inner tube 21 of the double wall lance 4 and further improve combustion efficiency.
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公开(公告)号：EP2851436A4
公开(公告)日：2015-08-05
申请号：EP13790736
申请日：2013-05-17
申请人： JFE STEEL CORP
IPC分类号： C21B5/00
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公开(公告)号：EP2851435A4
公开(公告)日：2015-12-30
申请号：EP13790679
申请日：2013-05-17
申请人： JFE STEEL CORP
摘要： A method for charging blast furnace raw material into a blast furnace, comprising, when charging blast furnace raw material including coke and ore material such as sinter, pellet, or lump ore into the blast furnace using a rotating chute, forming a central coke layer at a shaft central portion of the blast furnace; and forming a mixed layer of the coke and the ore material on the outside of the central coke layer with a coke mixing ratio varying in a continuous or stepwise manner from the shaft of the blast furnace towards the furnace wall in the blast furnace radial direction. The method ensures gas permeability in the blast furnace, stabilizes blast furnace operations, and improves thermal efficiency even when an operation to blow in a large amount of pulverized coal is performed.
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公开(公告)号：EP2851437A4
公开(公告)日：2015-12-16
申请号：EP13791416
申请日：2013-05-17
申请人： JFE STEEL CORP
摘要： According to the present invention, by setting the average layer thickness L av1 at each rotation of the rotating chute, calculated by Expression 1, to be smaller than the thickness h of coke charged into the shaft central portion of the blast furnace, it is possible to provide a method for charging raw material into a blast furnace that ensures gas permeability in the blast furnace, stabilizes blast furnace operations, and improves thermal efficiency even when the amount of coke is small, or an operation to blow in a large amount of pulverized coal is performed. Expression 1 is L av1 = V n /((R n 2 -R n-1 2 )À), where V n is the charged raw material volume (m 3 ) per rotation at the n th rotation, and R n is the falling radius (m) of charged raw material at the n th rotation.
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